468 DC MRS_Satellite_Synchronized_Clock_Oct86 MRS Satellite Synchronized Clock Oct86
User Manual: 468-DC-MRS_Satellite_Synchronized_Clock_Oct86
Open the PDF directly: View PDF 
.
Page Count: 154
| Download | |
| Open PDF In Browser | View PDF |
TRUETIME
OPERATING AND
SERVICE MANUAL
"MODEL 468-DC-MRS"
Satellite Synchronized Clock
,.
0
...
.:i
'.,.,,
-~'
_j ,_
'•
I
•
~7
_j
l •
l
I
";
~J
• "l
"j . )
- •
NB,$, TIME
" . , · . : .. i
KINEMETRICS/TRUETIME:
3243 SANTA ROSA AVE., SANTA ROSA, CA 95407 (707) 528-1230 - TELEX 176687 - FAX (707) 527-6640
MANUAL DATED 10/86
~
KINEMETRICS
"References in
this manual to:
468-DC
A-468MS
A-468RK
KINEMETRICS I TRUETIME
3243 Santa Rosa Ave.
Santa Rosa, CA 95407
May be
replaced 'by:
468-DC/MM
A-468MS/RK/MM-2
A-468RK/MM-2 11
TRUETIME
KINEMETRICS
MARTIN MARIETTA CORPORATION
SAT .RS OP..DER NO.
In 1982 Kinemetrics/TrueTime redesigned the Models A-468MS/RK and
A-468RK GOES antenna system.
The newer MK II version of the
Model A-468MS/RK has a different circuit card and has different
dimensions than the MK I.
The MK II antenna is still compatible
with the MK I Remote Kit, and the MK II Remote Kit is still compatible with the MK I antenna as far as function is concerned.
The MK II version of the Remote Kit also has a different circuit
card and different dimensions.
When we supplied GOES antennas to Martin Marietta in 1984, we
were able to remanufacture MK I kits from resources that were
still available to us.
Those resources are no longer available.
Producing MK I antennas at this point in time would entail an extremely prohibitive expense for Martin Marietta.
The MK II GOES
antenna system is now the only version available to us. However,
we can still accommodate Martin Marietta van application by
providing a special adapter plate to be installed on the MK II
Remote Kit.
This plate will allow the user to interchange both
MK I and MK II Remote Kits. Both units are
as far as input/outputs are concerned.
The mounting holes in the antenna pedestal baseplate have been
drilled out to 0. 459", and the upright mounting stanchion has
been shorted to 9.5" to conform to Martin Marietta Drawing No.
850MROR0026. Applicable drawings follow this page.
KINEMETRICS/TRUETIME: 3243 SANTA ROSA AVE., SANTA ROSA, CA 95407 (707) 528-1230 - TELEX 176687 - FAX (707) 527-6640
·468DC-MRS SYSTEM DESCRIPTION
-ITEM
PART NUMBER
DESCRIPTION
l
468~DC
2.
A-468MS/RK MM 2
GOES Antenna Mark II
3
A-468RK MM
Antenna Remote Kit
4
A-468Br/MM
Base Plate Adapter for Item 3
5
A-468 MM - 1.5
Cable Assembly 1.5 foot length
6
A-468 MM - 20
Cable Assembly 20 Foot length
RG 214 with "N" Connectors
7
A-468BC/MM
"N" Bulkhead Connector
8
A-468AP1/MM
Paint Code 17925 for Item 2 (White)
9
A-468PP1/MM
Paint Code 17925 for Item 4 (White)
MM
GOES Satellite Synchronized Clock
WARRANTY INFORMATION:
The Kinemetrics/TrueTime design of the 468-DC-MRS is considered proprietary.
Kinemetrics/TrueTime's Santa Rosa factory is the only facility authorized to
perform warranty repairs. This warranty is transferable from Martin Marietta
to their end user. Refer to pages 1 through 3 of this manual for additional
details.
APPENDIX •A"
PAGE
DESCRIPTION
1
468-DC{MM ·
2
A-468MS/ ~MM
3
A-468RK/MM· ·
4
A-468 BP/"· MM·
~
10.00 MAX
"'
<
T
.22 TYP
MODEL 468-DC/MM
GOES SATELLITE CLOCK
TO A-468RK/MM-2
REMOlE KIT
"N• CONNECTOR
~Annc-1
IVIVLJLL
/\_.A~QU~
I\
/DLt lt..At..A-?
'-
IVUIVl....J/ l ' I ' / 1v11v1
GOES ANTENNA
WITH MOUNTING HARDWARE
TO 468-DC/MM
·aNc· CONNECTOR
FROM A-468MS/RK/MM-2
•N• CONNECTOR
MODEL A-468RK/MM-2 REMOTE KIT
RIVNUTS
(HOLE PATIERN TO MATCH NEW
REMOTE Kil) FITS 5/16• BOLT
r
ADAPTER
COUNTERSUNK HOLES
PLATE
FOR ATTACHMENT TO VAN
{HOLE PATTERN TO MATCH OLD
REMOTE KIT) FITS 10-32 FLATHEAD SCREWS
7
··-
• fV\._
.050·
10.00·
I I
1.00·
0.75•
......_------13.00•
-----------4....
NOTE: DRAWING NOT TO SCALE
MATERIAL: 1/8• PLATE ALUMINUM, PAINTED
MODEL A-468BP /MM
MK I TO MK II REMOTE ADAPTER PLATE
TABLE OF CONTENTS
SECTION
I
PAGE
GENERAL INFORMATION
1-1
1-7
1-8
II
INTRODUCTION...................................
WARRANTY .......................................
SPECIFICATIONS.................................
INSTALLATION
2-1
2-7
2-9
III
1-1
1-3
1-4
ANTENNA INSTALLATION ................ ~ ..........
RACK MOUNTING..................................
INSTRUMENT START-UP ............................
2-1
2-4
2-4
OPERATION
3-1
3-3
3-7
3-11
3-13
3-16
3-18
3-24
3-26
3-28
3-36
3-41
3-45
3-51
3-55
3-66
3-74
3-7 5
3-79
3-84
3-88
3-92
3-94
3-97
3-98
3-104
3-106
3-114
3-123
3-125
'"\
1
'"\ /""\
.)-1.)U
3-133
3-134
3-135
INTRODUCTION .................................. .
SATELLITE EAST-WEST LED ....................... .
DISPLAY ....................................... .
HOURS OFFSET .................................. .
12/24 HOUR CLOCK OPERATION .................... .
AUTOMATIC/MANUAL SATELLITE SELECTION .......... .
PROPAGATION DELAY ............................. .
1 Hz •••••••••••••••••••••••••••••••••••••••••••
1 KHz •.•••••••••••.••••.....•.•.•••••••••••••••
IRIG-B (REMOTE DISPLAY DRIVING OUTPUT) ........ .
SLOW CODE ..................................... .
C..()
vu
u~
11~
•
•••••••••••••••••••••••••••••••••••••••••
EXTERNAL OSCILLATOR (Option) .................. .
IRIG-H (Opt ion) ............................... .
PARALLEL BCD TIME OUTPUT (Option) ............. .
RS-232 TIME OUTPUT (Option) ................... .
RS-232 MODE DESCRIPTIONS ...................... .
MODE C........................................ .
MO DE T •••••••••••••••••••••••••••••••••••••••••
M0 DE F •••••••••••••••••••••••••••••••••••••••••
MODE M........................................ .
MODE P ........................................ .
MODE R........................................ .
NOTES ......................................... .
MODE U - DUT1 MODE ............................ .
M0 DE E . . . . . . . . . ............................... .
I -MODE - (Opt ion) ............................. .
DAMS/HEALTH MESSAGE SOFTWARE (Option) ......... .
DAMS/HEALTH MESSAGE SET UP KEY STROKESo••······
VERIFICATION KEY STROKES ...................... .
DAMS/HEALTH MESSAGE INFORMATION KEY STROKES ....
OPERATING NOTES ................................
IEEE-488 OUTPUT (Option) .......................
INTRODUCTION ...................................
1
3-1
3-1
3-4
3-4
3-5
3-5
3'.'""5
3-7
3-8
3-8
3-9
3=9
3-10
3-10
3-11
3-15
3-19
3-19
3-19
3-20
3-21
3-21
3-22
3-22
3-23
3-24
3-24
3-25
3-27
3-27
3-29
3-29
3-30
3-30
TABLE OF CONTENTS
(cont.)
SECTION
III
OPERATION (cont.)
3-137
3-140
3-142
3-146
3-151
3-156
3-158
3-161
3-165
3-167
3-170
3-173
3-177
3-179
IV
PAGE
HARDWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXTERNAL TRIGGER ...............................
SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODE F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODE M.........................................
MODE N.........................................
MODE P .........................................
MODE T.........................................
SAMPLE PROGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D.C. POWER INPUT (Option) ......................
SOus TIMING (Option) ...........................
DAYLIGHT SAVINGS TIME CORRECTION .......•.......
RS-232 STANDARD MODES .........................
ADVANCED PERFORMANCE OPTION ....................
3-30
3-31
3-31
3-31
3-32
3-33
3-33
3-34
3- 3 5
3-37
3-37
3-38
3-38
3-39
THEORY OF OPERATION
4-1
4-16
4-17
4-19
4-21
4-26
4-31
4-34
4-36
4-38
4-42
4-47
4-52
4-58
4-61
4-64
4-68
4-71
4-75
4-77
4-81
4-84
4-87
4-90
4-102
4-103
4-105
4-107
4-119
THEORY OF OPERATION MODEL 468-DC .............. .
DETAILED DESCRIPTION OF OPERATION ............. .
ACTIVE ANTENNA ASSEMBLY 86-170 ................ .
PRE - AMP LI F IE R. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
lST L.O. MUL'NPLIER/MIXER ..................... .
INTERMEDIATE FREQUENCY AMPLIFIER .............. .
DETECTOR BOARD ASSEMBLY 86-73 ................. .
ANALOG BOARD ASSEMBLY 86-74 ................... .
RF LOCK DETECTOR .............................. .
RF LOCK LOOP .................................. .
DATA DETECTOR ................................. .
DATA LOCK DETECTOR ............................ .
COARSE PHASE LOCKED LOOP .......•...............
FINE DATA PHASE LOCKED LOOP ................... .
EXTERNAL OSCILLATOR INPUT (Option) ............ .
TIMING CHAIN ..........................•......•.
DIGITAL BOARD - ASSEMBLY 86-42 ................ .
POWER SUPPLY - ASSEMBLY 86-52 ...............•..
DISPLAY BOARD - ASSEMBLY 86-43 ....•............
PARALLEL BCD TIME OUTPUT (Option) - ASSY. 86-44
RS-232 INTERFACE (Option) - ASSEMBLY 86-46 .....
DAMS/HEALTH MESSAGE (Option) ..................•
IEEE-488 INTERFACE (Option) - ASSEMBLY 86-47 .. .
D.C. POWER INPUT (Option) ..................... .
SOFTWARE ...................................... .
PROGRAM DESCRIPTION ........................... .
RECEIVER CONTROL AND DATA PROCESSING .......... .
DESCRIPTION OF THE STATE DIAGRAMS ...•........•.
TIMING OUTPUTS ................................ .
2
4-1
4-6
4-6
4-6
4-6
4-7
4-8
4-8
4-8
4-8
4-9
4-11
4-13
4-14
4-15
4-16
4-16
4-17
4-17
4-17
4-18
4-18
4-18
4-18
4-20
4-20
4-20
4-20
4-26
V
MAINTENANCE AND TROUBLESHOOTING
5-1
5-4
5-8
5-10
5-12
5-14
5-16
5-18
5-22
5-49
5-51
VI
MAINTENANCE MODEL 468-DC .......................
THIRD I.F. TRIM - AS~EMBLY 86-73 ...............
DATA SYMMETR~ ADJUSTMENT - ASSEMBLY 86-74 ......
EAST SWEEP TRIM - ASSEMBLY 86-74 ...............
WEST SWEE? TRIM - ASSEMBLY 86-74 ...............
10 MHz FINE TIMEBASE TRIM - ASSEMBLY 86-74 .....
1 MHz COARSE TIMEBASE, ASSEMBLY 86-74 ..........
FIRST LOCAL OSCILLATOR PEAKING, ASSEMBLY 86-74.
TROUBLESHOOTING ................................
TROUBLESHOOTING THE EXTERNAL OSCILLATOR (Opt.).
TROUBLESHOOTING THE D.C. SUPPLY (Option) .......
5-1
5-1
5-2
5-2
5-3
5-3
5-3
5-3
5-4
5-8
5-8
SCHEMATICS AND PARTS LISTS
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11
6-12
6-13
6-14
6-15
6-16
6-17
6-18
6-19
6-20
6-21
6-22
6-23
6-24
6-25
6-26
6-27
6-28
6-29
6-30
6-31
6-32
6-33
PARTS LOCATION - ASSEMBLY 86-170 .............. .
SCHEMATIC - ASSEMBLY 86-170 ................... .
SYMBOL DESIGNATION REFERENCE 86-170 ........... .
PARTS LOCATION - ASSEMBLY 86-173 .............. .
SYMBOL DESIGNATION REFERENCE 86-173 ........... .
SCHEMATIC - ASSEMBLY 86-173 ................... .
PARTS LOCATION - ASSEMBLY 86-73 ............... .
SYMBOL DESIGNATION REFERENCE 8r ~1 ............ .
SCHEMATIC - ASSEMBLY 86-73 .................... .
PARTS LOCATION - ASSEMBLY 86-74 ............... .
SCHEMATIC - ASSEMBL'- 96-74 .................... .
SYMBOL DESIGNATION R~iERENCE 86-74 ............ .
PARTS 10CATION - ASSEMBLY 86-42 ............. .
SYMBOL DESIGNATION REFERENCE 86-42 ............ .
SCHEMATIC - ASSEMBLY 86-42 .................... .
PA~TS LOCATION - ASSEMBLY 86-43 ......... ~- ..... .
SYMBOL G:SIGNATION REFERENCE 86-43 ............ .
SCHEMATIC - ASSEMBLY 86-43 .................... .
PARTS LOCATION - ASSEMBLY 86-44 ............... .
SYMBOL DESIGNATI0N REFERENCE 86-44 ............ .
SCHEMATIC - ASSEMBLY 86-44 .................... .
PARTS LOCATION - ASSEMBLY 86-46 ............... .
SYMBOL DESIGNATION REFERENCC 86-46 ............ .
SCHEMATIC - ASSEMBLY 86-46. , ................ .
PARTS LOCATION - ASSEMBLY~: -47 ............... .
SYMBOL DESIGNATION REFERENCE 86-47 ............ .
SCHEMATIC - ASSEMBLY 86-47 .................... .
PARTS LOCATION - ASSEMBLY 86-52 ............... .
SYMBOL DESIGNATION REFERENCE 86-52 ............ .
SCHEMATIC - ASSEMBLY 86-52 .................... .
PARTS LOCATION - ASSEMBLY 86-147 .............. .
SYMBOL DESIGNATION REFERENCE 86-147 ........... .
SCHEMATIC - ASSEMBLY 86-147 ................... .
3
6-2
6-3
6-4
6-6
6-6
6-7
6-8
6-8
6-9
6-10
6-11
6-12
6-14
6-14
6-15
6-16
6-16
6-17
6-18
6-18
6-19
6-20
6-20
6-21
6-22
6-22
6-23
6-24
6-24
6-25
6-26
6-26
6-27
VI
SCHEMATICS AND PARTS LISTS
6-34
6-35
6-36
6-37
6-38
6-39
6-40
6-41
6-42
6-43
6-44
6-45
6-46
6-47
6-48
6-49
6-50
6-51
VII
PARTS LOCATION - ASSEMBLY 86-53 ................
SYMBOL DESIGNATION REFERENCE 86-53 .............
SCHEMATIC - ASSEMBLY 86-53 .....................
REAR PANEL ASSEMBLY 220-30 .....................
PARTS LIST 220-30 ..............................
SUBCHASSIS ASSEMBLY 221-30 .....................
PARTS LIST 221-30 ..............................
MODEL 468-DC FINAL ASSEMBLY 151-70 .............
PARTS LIST 151-70 ..............................
MODEL A-468MS FINAL ASSEMBLY 142-170 ...........
PARTS LIST 142-170 .............................
MODEL A-468MS SUB-ASSEMBLY 141-170 .............
PARTS LIST 141-170 .............................
MODEL A-468HX SUB-ASSEMBLY 141-171 .............
PARTS LIST 141-171 .............................
MODEL A-468HX FINAL ASSEMBLY 142-171 ...........
PARTS LIST 142-171 ASSEMBLY 142-171 ............
A-468 ANTENNA SYSTEMS ..........................
6-28
6-28
6-30
6-31
6-31
6-31
6-31
6-32
6-32
6-33
6-33
6-33
6-33
6-34
6-34
6-34
6-34
6-35
ANTENNA INSTALLATION FOR MODELS A-468MS, A-468HX,A-468RK,
A-468Rtc, EXTERNAL ANTENNA INPUT
7-1
7-4
7 -9
7-10
7-14
7- 15
7 - 21
7-27
VIII
(cont.)
GENERAL INFORMATION ............................
MODEL A-468MS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I NS TALLA TI ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL A-468HX..................................
INSTALLATION...................................
M0 DEL A- 4 6 8RK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M0 DEL A- 4 6 8RK C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXTERNAL ANTENNA INPUT .........................
7-1
7 -1
7- 3
7-3
7-4
7- 6
7- 8
7-8
IRIG-B AND IRIG-H TIME CODE FORMAT
8-1
8-4
8-11
INTRODUCTION...................................
IRIG CODE FORMAT ...............................
CONTROL FUNCTIONS ..............................
4
8-1
8-1
8-2
SECTION I
GENERAL INFORMATION
INTRODUCTION
1-1
1-2
This manual has been designed and written to provide
the owner of the Model 468-DC 'GOES' Satellite Synchronized Clock
r.1 ;
VY
...L.
th
'- L
J
a
1 1
\.A ..L
..L
/"\ f
'-J
.L.
f'-
h
o
L J "-
rt
..._...
!l
'-"
t-
'-
!l
\.A
!l
n
rt
\.A L J. '"4
;
n
..&.. .L J.
f /"\ r m
.L
..._,,
.L
!l
l..l.J. \.A
t; '-J
/"\ nL
'.L
J.
n1. .I o""-'" 'o- rt
o rt
..._... ' -
"-&
t- /"\
' - .._,.
/"\ no
t' """" r
'-'
.L.
!l
'-"
t- o
'-
"-'
!l
n
rt
\.A L J. '-.&
11
f- ;..L -
\A ' -
lize all its features.
1-3
The information included in this manual is as complete
as possible and includes normal maintenance and adjustment data
that may be required to facilitate field repair of the unit.
1-4
The Model 468-DC has been designed to receive the NOAA
"GOES" Satellite which transmits on a frequency of 468 MHz and
decode the time information from the broadcasts as well as display outputs for supplying the time information to other equipment.
The Synchronized Clock in its standard configuration provides a front panel display of days, hours, minutes, and seconds
with five rear panel BNC connectors with IRIG B, 1 Hz, 1 kHz,
Precision 60 Hz, and Slow Code locked to the electrically outputted time (and options if ordered), may be in either Universal
Coordinated Time (UTC), more commonly referred to as Greenwich
Mean Time (GMT), or in local time.
This is done through the
proper time zone offset selected by the rear panel thumbwheel
switches. The Model 468-DC is shipped to display the time of
year in the twenty-four hour format.
By simply removing the
cover and switching the position of the small switch on the
microprocessor circuit board, the unit can be converted to display and output time in the more conventional twelve hour format.
1-5
This instrument has been designed to be completely
automatic requiring only antenna installation and connection of
the unit to the power source. Once the instrument is installed
and turned on, the microprocessor will lock to the signal from
the "GOES" Satellite (either East or West Satellite by sweeping
for lock), decode and display the time. From that point on, the
unit will require no further attention and will provide time to
an accuracy of +1.0 ms, continually updated by and phase locked
to the transmissions of the "GOES" Satellite. In the event of
loss of signal, the unit will continue operation on its internal
crystal time base.
If power should fail, upon restoration, the
unit will again read the time signals and start displaying the
time transmitted.
1-6
The Model 468-DC Satellite Svnchronized Dis:dtal Clock.
when using the A-468MS Antenna, is gu~ranteed to op~rate ~t any
location within the 5° viewing angle of the satellite as shown on
the map enclosed. For viewing angles of 0° - 5° the Model 468-HX
should be utilized.
1-1
150°
180°
EAST
FIGURE 1-1
150°
120°
900
~o
~o
~
+ IN-ORBIT SPARE LOCATED AT 105° W
WEST
GOES SATELLITE COVERAGE MAP
1-2
1-7
WARRANTY
KINEMETRICS/TRUETIME warrants each
instrument it manufactures to be
free from defects in material and
workmanship for a period of one
year from the date of delivery to
the original purchaser. Under this
warranty, any instrument which is
returned to us (freight pre-paid)
and is found by us to be defective
in material or workmanship will be
repaired or replaced (at our option) at no charge to the customer
and returned freight pre-paid.
Our obligation under this warranty
is limited to servicing or adjustment of any instrument returned.
Items not covered by this warranty
are:
fuses, batteries, and any
illuminated parts or damage caused
by accident or physical destruction
of the instrument.
This warranty is expressly in lieu
of all other obligations or liabilities on the part of TrueTime.
TrueTime neither assumes nor authorizes any other person to assume
for them any other liability in
connection with our sales.
1-3
1-8
SPECIFICATIONS
RECEIVER FREQUENCY:
468.8250 and 468.8375 MHz Automatic
Manual select.
SYSTEM
SENSITIVITY:
The sensitivity is suitable for proper
operation with satellite viewing angle
5° or more above the horizon when using
the A-468MS
Antenna.
(approximately
.2uV/m)
SYSTEM NOISE MARGIN:
Operates with 9db attenuator inserted
between A-468MS flat plate and preamp
input in locations which have a satellite elevation of greater than 15°.
TIMING ACCURACY:
1)
+1.5 ms of UTC/NBS Time when corrected
for
propagation
delay
through on-board switches and using
the A-468MS Antenna.
2)
The time difference between neighboring clocks locked to the same
satellite is considerably improved
over UTC timing accuracy.
Consult
the factory for specification and
conditions.
or
PROPAGATION
DELAY CORRECTION:
Two internal decade switches provide
+50 ms correction capability in 1 ms
steps.
TIME BASE STABILITY:
When not phase locked,
to +l x 10-6.
crystal controls
For higher stability time base when not
phase locked to satellite, see "External
Oscillator Input" Option.
1/2" high planar gas discharge.
Displays day of year, hours, minutes and
seconds.
DISPLAY:
DISPLAY
ACCURACY:
-0 to +100 ms,
flashing.
anytime colons are not
NOMINAL TURN-ON TIME:
Three minutes from power on and signal
reception
with 90% confidence under
average signal conditions.
OPERATING TEMP:
0°
1-4
to 50° C.
REAR PANEL OUTPUTS:
1 Hz:
Rising edge on time, drives ten TTL
loads or CMOS. High 10%, Low 90%. See
SECTION III, entitled "l Hz".
1 KHz:
Rising edge on time, drives two TTL
loads or CMOS. High 10%, Low 90%. See
SECTION III, entitled "l KHz".
DRM()'l'R
.l\..LU:J \J ..L .U
f\T
~ DT AV
L I . L U L. .UC:J. .&..
DRIVING (IRIG B):
IRIG B Time Code is provided on a rear
panel BNC connector.
Standard IRIG B
Time Code is an amplitude modulated 1
KHz carrier.
This output can also be
easily field converted to TTL compatible
D.C. level shift time code. See Section
III, entitled "IRIG-B (REMOTE DISPLAY
DRIVING OUTPUT)".
SLOW CODE:
BNC output of 1 pulse per minute (lppm),
1 pulse per hour (lpph), and 1 pulse per
day (lppd). The pulses go high on time
and remain high for 2 seconds for minute
mark, 4 seconds for hour mark and 6
seconds for day mark.
Capable of
sourcing 40 MA at 4.0 volts minimum, and
pulled to ground by a lk ohm resistor.
See SECTION III, entitled "SLOW CODE".
60 HZ:
Provided on BNC connector as frequency
source to drive a synchronous motor
through a power amplifier.. Capable of
driving 10 TTL loads. The output square
wave has an unusual duty cycle. The 60
Hz is a 50% duty cycle over 50 ms (3
cycles).
Cycle #1
Cycle #2
Cycle #3
High 9ms, Low 8ms
High 8ms, Low 9ms
High 8ms, Low 8ms
See SECTION III, entitled "60 Hz".
EXTERNAL
OSCILLATOR
(Option):
Input level of less than 4V and greater
than 2.4 volts (TTL) sine wave or square
wave is required. Any frequency from
100 KHz to 10 MHz in multiples of 100
KHz is satisfactory. No unit adjustment
is needed regardless of frequency.
Used
as clock time-base when not phase locked
to the satellite~
See SECTION III.
entitled "EXTERNAL OSCILLATOR".
.
1-5
IRIG H (Option):
BNC output of standard IRIG H format TTL
DC level shift supplied unless otherwise
requested. If 1 KHz amplitude modulated
carrier requested, IRIG B will automatically be supplied in D.C. Level Shift
format.
See SECTION III,
entitled
"IRIG-H (Special Order Option)".
PARALLEL BCD
TIME (Option):
If ordered, Parallel BCD time of year is
provided on rear panel 50 pin "D" connector.
Days, hours, minutes, seconds
and milliseconds are provided.
Lines
indicating worst-case time error of +l,
+5, +50 and +500ms drives 15 "LST'T"L"
Toads-or 'CMOS': See SECTION III, entitled "PARALLEL BCD TIME OUTPUT (Special
Order Option)".
The High Capacity Parallel
100 LSTTL loads.
BCD
drives
RS-232 (Option):
The displayed time of year is outputted
in EIA Standard RS-232C configuration
via a "Motorola ACIA". Output format is
D
D
D
H
H M
M
S
S
and an indicator of the time quality,
CR/LF. Baud Rate and "ACIA" opt ions are
dip switch selectable. See SECTION III,
entitled "RS-232 TIME OUTPUT (Options)".
I-MODE (Option):
Time can be preset and displayed without
synchronization to NBS transmissions.
S-MODE (Option):
DAMS/Health Message Software.
Assists
users of NESS data collection system to
check the quality of uplink transmissions.
IEEE-488
(Option): IEEE Buss interface is also available.
The time is outputted in ASCII format,
with the most significant digit first
(lOO's of days).
Among operating modes
is time on demand to the millisecond
level, or marked time to the milliseconds level.
See SECTION III, entitled
"IEEE-488 OUTPUT (Option)".
HOURS OFFSET:
Rear panel thumbwheel switch
allows
adjustment of + or - "O" to "11" hours
from transmitted UTC time.
See SECTION
III, entitled "HOURS OFFSET
•
11
•
1-6
12/24-HR. OPERATION:
Dip Switch located inside unit allows
use as 12 hour clock in place of 24 hour
format as shipped.
See SECTION III,
entitled "12/24-HOUR CLOCK OPERATION".
468-DC SYNCHRONIZED DIGITAL CLOCK
SIZE:
1-3/4" x 17" x 10-1/2" (4.4 x 43.2 x
26.7cm) behind panel.
Mounts in standard 19" (48.9cm) EIA rack system, hardware included.
24" (60. 9) hardware
available.
WEIGHT:
7-1/4 lbs.
(5.4kg).
POWER (Standard):
96-135VAC, 60-400Hz, less than 25 volt
amps. Others available on request.
D.C. POWER INPUT:
When ordered, the standard AC input is
replaced with binding posts on 3/4"
centers, red is positive, black is negative.
Common "Banana Plugs" can be
used. Input voltage may be 11 vdc to 32
vdc.
Power is approximately 20 watts
depending upon option.
(3.5kg) Ship Wt.
12 lbs.
A-468MS ANTENNA
CT7"R.
u.Lu:J.J•
10" x l 0
cm).
WEIGHT:
10 lbs(4.5 kg) Ship Wt. 16 lbs.(7.3kg.)
II
hi
•• oh
..
~b
(25.4 cm x 25 .. 4 cm x 30.5
A-468HX ANTENNA
SIZE:
17" x 17" x 43" high (4'.1.2 cm x 43.2 cm
x 109 cm) Provided with a universal
mounting system and hardware.
WEIGHT:
22 lbs (10 kg)
Ship Wt. 66 lbs. (30 kg)
A-468RK DOWN CONVERTER
SIZE:
10 .. x 13" x 2.4" (2.54 cm x 33.0 cm
6. 1 cm) .
WEIGHT:
10 LBS (4.5 KG)
(7
' , •
1.
...,,,
lro'i
..
,/
~b
Ship Wt.
16 lbs.
•
1-7
x
17.00 - - - - - - - - - - - - - - - ·
15.00
FIGURE 1-2
1-8
MODEL 468-DC DIMENSIONS
17.00
SECTION II
INSTALLATION
2-1
ANTENNA INSTALLATION
2-2
The Model 468-DC Synchronized Clock is shipped ready for
operation and will require no adjustments.
The first step in
set-up and operation of the unit is to install the antenna included with the unit. An antenna supplied by KINEMETRICS/TRUETIME
for use with the Model 468-DC must be used in conjunction with
this receiver/clock as the antenna includes not only a preamp,
but receiver controlled frequency conversion circuits.
The use
of "in antenna conversion" of the 468 MHz frequency to a lower
frequency for transmission down the coax allows up to 1000 feet
of RG-58/U lead in coax to be used.
2-3
Satellite selection in the Model 468-DC can be either
automatic or manual. Maximum time accuracy is obtained in the
manual mode where the operator selects either the East or West
satellite then sets the propagation delay switches.
In the
automatic mode the Model 468-DC will try for the East satellite
first then the West satellite. If only basic time is required
and a change in the received satellite, which can result in a
worst case error in propagation delay of 9 milliseconds, is
acceptable then the automatic mode can be used and the advantage
of automatic scanning is achieved.
This scanning allows the
receiver to select either receivable satellite in the case of
poor or no reception from one. The automatic mode can be used
only if a common pointing direction will allow the antenna to
receive signals from both satellites. This can be evaluated by
the use of the pointing angle maps, FIGURES 2-1 and 2-2. The
beamwidth of the A-468MS antenna is approximately 90%.
Both
satellites can be received by the A-468MS antenna in most areas
where there are no obstructions from buildings, trees or mountains.
If maximum time accuracy is required with respect to UTC
or another 468-DC in the field then either the East or West
satellite must be selected, the antenna pointed at the selected
satellite, the propagation delay calculated and the internal
switches set.
SECTION III, PROPAGATION DELAY, gives switch sett i ng instr u c t ions.
2-4
Once it is determined which satellite will be received
(or if both are to be received) the attached maps can be used to
determine the best pointing direction for the users location. In
the case of the A-468MS, the antenna should be physically pointed
such that the signal from the satellite comes onto the antenna
receiving plate through the top of the plastic bubble. The axis
of the A-468HX. the Helix, should be pointed at the satellite for
best results. Thus, if the user was d~irectly under the satellite,
the antenna would be set with it facing straight up.
If the
satellite was at a 5° angle above the horizon, the antenna must
be tipped at 83°.
2-1
N
I
N
'"1'.I
II-«
Cl
LONGITUDE
c::
~
tl;l
100
90
120
140
160
E
180
w
160
140
I
120
.-.z
~
100
80
60
40
.-.z
TH
20
0
20
40
H
90
,......
80
80
0
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
pj
(/)
t:zj
>
{/)
-1
z>
t-i
t:zj
z
z
>
l'l:J
0
w
Cl
:::i
w
Cl
=>
0
.....
10
10
<(
....J
0
?O
20
>
z
30
30
40
40
50
50
60
60
lO
70
1-4
z1--J
t-4
~--
0
.....
Ic:(
_J
z
0
t""4
1:11
80
80
AZ
90
100
120
140
160
E
180
w
160
140
120
100
80
60
t~O
LONGITUDE
EASTERN SATELLITE POINTING ANGLES.
H
20
0
20
40
90
LONGITUDE
100
120
140
160
E
180
W
160
140
120
100
80
60
40
20
0
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A.Z. . . ..
H .. , .. . . . . . . . . . . . .. , .. . . . . . . . . . . . . . . . . . . . . . . . . . .-~_.llliilp.............,..... S'O
9 0 . -. .,_.~,._........mi.......................A.Z. . .TH
N
I
80
dO
70
70
60
to
N
0
0
~
en
50
40
40
30
.30
20
w
10
10
Cl
I-
1--
1 ()
~:5
I-
l·-
.....J
20
30
30
40
50
60
70
80
AZ
TH
AZ
H
90._..........- ............- .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._...._. .._.......... -.... -.... -. .. -......... -........_.....11111111......i.......i.-.._.. ._......_.........._. 90
100
120
140
160
E
180
W
160
140
120
100
80
60
40
LONGITUDE
l;..)
::::>
0
c:(
N
1
Lu
C..J
::::>
WESTERN SATELLITE POINTING ANGLES.
20
0
20
40
2-5
Included with the antenna is a mounting flange with a
shaft attached to allow versatile tipping as well as rotation for
proper antenna pointing.
The stand also allows attachment of
this antenna to a flat surface for mounting. See Section VII.
2-6
Once the mounting and pointing of the antenna is complete, attach a lead in coax. For this purpose RG-58/U is available from Kinemetrics/Truetime in 50' and 100' lengths.
2-7
RACK MOUNTING
2-8
If it is desired to mount the Model 468-DC in a standard 19" rack system, use the rack mounting ears provided with
the unit.
These ears may be attached to the side of the cabinet
~y
removing the two 8-32 flat head screws on the side of the
instrument and placing the screws through the counter-sunk hole
in the bracket and re-installing the screw.
The unit now may be
mounted in a 1-3/4" opening in any EIA standard 19" rack system.
2-9
INSTRUMENT START-UP
2-10
After the antenna installation is complete, as described in SECTION II, entitled "Antenna Installation" above, the
lead-in coax should be connected to the rear panel BNC connector
labeled "ANTENNA".
Connect the power cord to the socket on the
rear panel and plug the unit into an appropriate power source.
The power switch on the front panel may now be turned on.
2-11
When the power is turned on, the initial indication of
proper operation of the Model 468-DC is the colons on the
display.
The colons will blink off and on at about once per
second.
This indicates to the user that the unit is operating
properly and that the receiver is looking for phase lock to the
carrier of the signql and then to the 100 Hz data rate of the
information broadcast.
Next, after the 468-DC has read and
recognized the maximum length sequence (MLS) transmitted each 1/2
second, the colons will be locked on solid.
2-12
Following this data lock, the synchronized clock will
recognize that it is reading data, a satellite location (as
transmitted in the message) will be read. From this information,
the 468-DC can determine if it is locked to the "EAST" OR "WEST"
Satellite and 1 ight the appropriate "LED" on the front panel.
2-13
Finally, after two 30 second long time frames of information of the time of year have been read which agree as to the
time, the front panel display will light indicating the correct
time of year.
At this same time, any options which have been
ordered to electrically output the time will begin to function.
2-14
One of the most often overlooked and yet most important
factors in the installation and operation of the Model 468-DC is
proper
antenna
installation.
Without a
proper
antenna
installation, the signal from the satellite will not be received
and thus the unit cannot possibly function properly.
In many
2-4
11
case s
j us t to tr y i t out 11 ,
an at tempt wi 11 be mad e to ope r ate
the
unit with the antenna inside a building or
without
determining the proper antenna pointing angle. This, as often as
not, results in inability to lock to the satellite signal, and
failure to decode the time.
2-5
SECTION III
OPERATION
3-1
INTRODUCTION
3-2
The Model 468-DC Synchronized Clock provides the user
with a means of obtaining time traceable to the U.S. National
Bureau of Standards with an accuracy of +L5msy
For stability,
the time base is phase-locked to the satellite data rate. The
time-of-year information broadcast by The National Oceanic and
Atmospheric Administration through the 11 GOES 11 Satellite is displayed in days, hours, minutes and seconds on the front pan~l.
Also available are outputs of this time information in the form
of Remote Display Driving Output (IRIG-B, Parallel BCD Time, or
RS-232C compatible interface, or IEEE-488 compatibility). The
Model 468-DC has been specifically designed to minimize operator
set-up and will provide many years of service without attention.
3-3
SATELLITE
EAST-WEST LED
3-4
Located on the lower left hand corner of the front
panel are two LED's labeled "Satellite", "WEST" or "EAST". These
green LEDs will light anytime the unit is receiving a sufficient
signal from one of the satellites to allow the internal time base
to phase lock to data frequency of 100 Hz.
When the unit is
initially turned on, if adequate signal is present, this LED will
light within 30 to 45 seconds. If, during the course of operation, phase lock with the satellite is lost long enough for the
R.F. Circuits to sweep for phase lock, (about 150 seconds), this
light will go out. When phase lock is regained and a satellite
position is recognized in the data, the appropriate LED will
again 1 ight.
3-5
Phase lock will be maintained continually in most areas
and the only occasion for loss of lock will be experienced due to
local noise interference.
The most common source is "land
mobile" transmitters on a frequency of 468.8250 MHz which is
directly on the Western Satellite frequency.
3-6
The Satellite LED also provides information as to the
Satellite position. If the 468-DC is able to read the time of
ye a r in for ma t ion b u t t he s a t e 11 i t e po s i t i on in form a t i o nr e ad in
code does not agree with the position shown on the propagation
determination maps, (FIGURES 3-1 and 3-2), the LED will blink.
If the R. F. carrier on which the time data was found is on the
468.8250 MHz frequency, the West LED will blink, if on 468.8375
MHz, the East LED will blink. This indicates to the user which
S3tellite is being received, but that propagation delay information may be incorrect and exact satellite position should be
determined if accuracies to the millisecond level are desired.
Satellite LED blinking also occurs when the unit is in "Automatic" satellite selection, the 468-DC has swept to the other
3-1
L.U
LONGITUDE
I
N
100
120
140
160
E
180
W
160
140
120
100
80
60
40
20
0
20
40
90 ............................................................................................................................................................................,........... 90
20
10
w
Cl
w
Cl
:::>
t-
::::>
0
tc:(
*---l+---+-~-+--fll~-++--+--++~~~+-+--4f---+~-+-~-+-~~~+--~t----1'-~-- 1
_J
I-
o
20
50
50
90 ...........................................................................................1111111111................................................................................... 90
100
120
140
160
E
180
W 160
140
120
100
LONGITUDE
FIGURE 3-1
WESTERN SATELLITE MEAN DELAYS
80
60
40
20
0
20
40
l-
:3
LONGITUDE
40
0
20
40
bO
80
100
120
JL40
160
E 180 W 160
120
140
100
90 .......................--i,_.........,.................,...........................................................,.................................~..................l. . . . . . . . . . . . . . . . . . . . .~.90
80
60
50
40
40
10
LaJ
0
:::;:)
I-
0
Ic(
....J
LaJ
0
:::;:)
10
40
50
60
90 .........................................................................................................................................................l. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
100
120
140
160
E
180
W 160
140
120
100
LONGITUDE
VJ
I
VJ
FIGURE 3-2
EASTERN SATELLITE MEAN DELAYS
80
60
40
20
0
20
40
I-
satellite, but complete time synchronization is not complete.
This usually requires less than 15 minutes to accomplish and then
clears the blinking.
3-7
DISPLAY
3-8
The front panel display of time is blank when the unit
is initially turned on, because the correct time is not known.
The time information broadcast by the "GOES" Satellite is
repeated every 30 seconds. The time in format ion is broadcast in
the first 11 seconds of each half minute. Requirements for the
display to light are: 1) the unit must obtain phase lock with the
carrier of satellite, 2) phase lock with the lOOHz data rate must
be obtained, and 3) two consecutive frames of time code must be
read which agree as to the time. When these three er iter ia are
met, the display will light showing the correct time in days,
hours, minutes, and seconds, Universal Coordinated Time (UTC)
more commonly referred to as Greenwich Mean Time (GMT).
Correct ion to local time, conversion to a 12-hour clock in place of the
24-hour time base as transmitted and correct ion for propagation
delay are covered in the following sections.
3-9
The display has been designed to indicate to the user
the accuracy of the time information being displayed and on the
time output lines if ordered. After the display turns on it will
indicate the worst case accumulated drift of the time information
should phase lock with the satellite be lost. When the unit has
accumulated loss of lock for 13.9 hours since the last synchronization to +Sms., the colons will flash.
The flashing colons
indicate that-the estimate of the worst-case error of the display
and outputted time is +SOms. of N.8.S. time. When the unit has
been in operation for T38.9 hours without phase lock since the
last synchronization, the complete display will flash.
This
flashing is certain to attract the operators attention and indicates that the time as displayed and outputted may have a worstcase error of more than ~SOOms. (1/2 second).
3-10
Display or colon flashing will stop when the signal
from the satellite is regained, phase locked to and the time code
is read. Under normal operation this will occur without operator
attention. It is very unlikely that either of these conditions
will occur under normal conditions. Due to the ability of the
unit to phase lock to the carrier frequency down to very low
signal levels, persistent flashing of the colons or di splay may
be an indication of poor reception due to local interference or
antenna location and/ or installation. Refer to SECTION V "Ma intenance and Troubleshooting" for additional information on this
subject.
3-11
HOURS OFFSET
3-12
Located on the rear panel is a thumbwheel switch labeled "HOURS OFFSET". This switch is set for "O" at the factory
which means that the displayed time will be Coordinated Universal
Time as broadcast. To change the hours on the display to read
3-4
local time, set the switch to the number of hours your location
is offset from Greenwich, England.
For example, if you ·are
located in the Eastern Time Zone and desire to display Local
Standard Time, the switch should be set for "-5", or for Daylight
Savings Time set for "-4". If, in this case, the display was
indicatin~ 1800 UTC. the clock would subtract 5 hours and display
1300 hour~ for Locai Standard Time.
If the unit has electrically
outputted time (IRIG-B, Parallel BCD, RS-232, or IEEE-488), the
time supplied on these outputs
will agree with the display.
Additional information on these outputs is included in the following sect ions.
3-13
12/24-HOUR CLOCK OPERATION
3-14
The Model 468-DC is shipped from the factory for operation on the 24-hour clock system as broadcast by the National
Bureau of Standards.
If it is desired to convert the clock to a
12-hour clock display, a small internal switch can be turned.
3-15
To convert a clock
to the 12-hour format refer to
FIGURE 3-3. Remove the four screws retaining the lid and slide
the select switch indicated in the photograph to the 12-hour
position. Replace the cover and re-install the screws.
3-16
AUTOMATIC/MANUAL SATELLITE SELECTION
3-17
As described in SECTION I I, "ANTENNA INSTALLATION", the
Model 468-DC can be used to automatically select the "EAST" or
the "WEST" satellite, or can be set manually for lock to either
s.atellite.
The receiver, as shipped from the factory, is set for
"Automatic" scanning of the satellites.
If it is desired
to
lock the receiver onto either satellite, remove the four screws
retaining the lid.
By referring to FIGURE 3-1, locate the "EAST"
and WEST" Satellite Switch.
If it is desired to lock to the East
Satellite, turn the "EAST" Switch to "ON", if the 'WEST" Satellite is desired, turn the "WEST" Switch to "ON".
With both
switches "OFF" the unit will be returned to automatic scanning
operation.
3-18
PROPAGATION DELAY
3-19
This feature is included with the Model 468-DC to allow
the microprocessor to compensate for the delay in the displayed
and outputted time and timing marks due to the time required for
the signal to travel to the receiver from the transmitter.
3-20
This feature consists of two switches on the Digital
Board Assembly.
To adjust these switches, first remove the four
screws which hold the top cover in place, remove the lid and set
it aside.
Refer to FIGURE 3-3 for identification of the "Pro pan-
':l
t- ; n n
f:,U\,...L.VL.1
Tl
o 1 !:l u
V'-..L.UJ
~ r.7 ;
t- ,-. ho c 11
LJH..L.\...'-LJ\..-JiJ
e
'T'h
o
.LLJ'-
t- r.7 n
ll....VV\..J
c r.7 ; t- ,-. ho c
..:JVY..L\....\,,...LJ'-...:J'
,-.
':l
n
'-'-'Ll
ho
LJ'-
,-. nm h ; n o
r1
'-'\Jl.J.11.J.LLJ.\,,...'-.&
tf"\
'-'-'
provide for a total of 99 ms, propagation delay for the unit.
The switch toward the rear panel provides 0 to 9 ms. and the
switch toward the front adds to this in steps of ten from 0 to 90
ms.
The r e for e , i f i t i s des i r ed to com pens a t e for 5 9 ms . prop a 3-5
nuc-»
TTL/ AH
sll.J.J!.CT
JIJMPI!.11.
pR.Ol'AGATION DELAY
BY UNLOCK 1NDICATOR
(RED LED)
100B.z UNLOCK
1NDICATOlt (RED LED)
l"rj
v.::i
'
O"
""""
~
Vo)
'
Vo)
Pd
~
~
C/'l
bn
~
""""
~
'3.
0
~
t:""'
~
CJ'<
~
'
d
n
kJ.TERNAL osc1LLATOR
· .ftl»ICATOll ( GlU!-1!.ll lE1>)
EAST SATELLITE
SELECT sw1TCR
WEST SATELLITE
SELECT sw1TCR
SLOW coDE OUTPUT
gation delay, the front switch would be turned to 5 (for 50 ms)
and the rear switch to 9 (for 9 ms).
3-21
Through the ground station at Wallops Island, the National Bureau of Standards advances the time sent to the satellite
by 260.000 ms.
Propagation delay from Wallops Island to the
Satellite and back to earth varies between 242.50 and 271.50 ms.
depending on satellite position and the receiving location.
This
results in the receiver signal being advanced up to 17.50 ms. or
retarded by 11.50 ms. relative to UTC-NBS depending on receiver
location and satellite being received.
3-22
This offset can be compensated for by the propagation
delay switches described above.
A switch setting· of 50 as shipped from the factory, sets the output time of the synchronized
c 1 oc k s i mu 1 tan eo us w i th the r e c e iv ed t i me o f the s i g n a 1. Inc r ea s ing the propagation delay switch setting advances the output time
relative to the received time by LO ms. per step.
Thus, a
switch setting of 62 advances the time output by 12 ms. as a
setting of 32 on the switches retards the output time by 18 ms.
3-23
The
appropriate setting of the propagation delay
switches can be determined by the use of the attached maps,
FIGURES 3-1 and 3-2.
If the clock is locked to the "EAST" or
"WEST" satellite as described in SECTION III,
entitled
"AUTOMATIC/MANUAL SATELLITE SELECTION", the delay can be determined relatively accurately.
If the unit is left on the "automatic" mode, the best compromise must be determined depending on
the receiver location.
EXAMPLE:
3-24
1)
A user located in the southern tip of Florida, USA
and having his unit locked to the "EAST" satellite
should set the switches to read 36 ms., "3'' on the
lO's of milliseconds switch and "6" on the units
of millisecond switch.
2)
If a unit is located at 120° west longitude and
40° north latitude and left in "automatic" mode,
the switches should be set to read 46 or 47 milliseconds at the users option.
This would be obtained by setting the lO's of milliseconds switch
to 11 4" and the units switch to "6 11 or "7".
1 HZ
3-25
The 1 Hz is provided as a rear panel BNC connector and
can be used for a wide variety of timing functions.
This output
is a pulse going high as the second remains high for 100 milliseconds and going low for the remaining 900 milliseconds.
This
output is driven from a 2N3904 (Q3) on the microprocessor board
(Assembly 86-42, see SECTION V).
The collector of Q3 is pulled
up to +SVDC with a 3.3K ohm resistor.
This output is taken off
of Pin #3 of Assembly 86-42 and capable of driving 10 TTL loads.
3-7
3-26
1 KHz
3-27
The 1 KHz rear panel output is similar in form to the
1 Hz above.
It is a square wave going high on time, remaining
high for 100 microseconds and low the remaining 900 microseconds.
This output is driven by U23 on Assembly 86-74 (see SECTION V)
which is a CMOS part number 4050. This output is fed to Assembly
86-42 in interconnecting wire(s) and to the rear panel from 86-42
Pin Number #17.
3-28
IRIG B (REMOTE DISPLAY DRIVING OUTPUT)
3-29
The primary purpose of the IRIG-B time code output is
to drive slave displays manufactured by Kinemetrics/TrueTime.
This output consists of the standard IRIG-B time code.
Refer to
SECTION VIII for a full description of this code.
3-30
When using this code for other than driving the
Mod e 1 RD - B, i t sh o u 1 d be no t e d th a t f o u r
"Control Functions" are used.
These control functions encode
estimated time accuracy as fully described in SECTION VII.
K in em et r i c s I Tr u e Ti me
3-31
This output is supplied on a rear panel BNC connector.
When shipped, this output is in a 1 KHz carrier amplitude modulated format but can be field converted to D.C. level shift code
format.
In addition to driving remote displays, this output can
be used to synchronize commercially available Time Code Generators or direct recording on magnetic tape.
3-32
The modulated 1 KHz format is a sine wave driven by two
sections of a Texas Instrument Part Number "TL084" in series with
50 ohm located on Assembly 86-74.
The high level of the code
is 3.3 volt peak to peak +0.SV, at the low level it is 1 Volt
peak to peak +.2V. This output is fed to Assembly 86-42 via the
jumper wire (Pin Number "P") and to the rear panel from terminal
number 18.
3-33
If it is desired to convert che IRIG-B time code from
the amplitude modulated 1 KHz form as shipped, to a level shift
output, it is necessary to remove the lid and move one wire. To
remove the 1 id, take out the four screws in the cover and set the
lid aside. Locate the Analog Board, Assembly 86-74, which can be
identified with the assistance of the photograph in FIGURE 3-3 of
this manual.
3-34
After locating the Analog Board, Assembly 86-74, note
on the right side of the board near the edge a red jumper wire
has been installed in two of three holes in a triangular shape
pattern. The rear point to which the wire is soldered, labeled
"AM", should be unsoldered and swung forward and resoldered into
the hold, labeled "TTL" toward the front of the instrument. This
connects the lead from the 2N3904 transistor near this hole to
pin "P" of the edge connector. Replace the 1 id and the IRIG-B
output will now be in level shift format.
3-35
The Level Shift format is driven by QlOO (2N3904) on
3-8
Assembly 86-74 with 2.2K ohm pull
about 10 TTL loads. After leaving
red to Assembly 86-42 on jumper
panel connector via pin 18 on thib
3-36
up to +SVDC. This will dr
QlOO, the IRIG-B is transtc..
wire pin "P" and to the rear
assembly.
SLOW CODE
3-37
The "Slow Code" output from the Model 468-DC has been
provided primarily for the purpose of providing timing marks on
drum recorders such as the Kinemetrics/TrueTime Model VR-1. This
output is a single line which goes high once per minute.
un
minute marks the output remains high for two seconds, on hour
marks the line is held high for four seconds and for the day
mark, a six second high is provided.
3-38
This output is driven by Ql on Assembly 86-42. This is
a MPS3702 transistor and will source 40 ma at 4.0VDC. This drive
is provided fro:m Pin #2 on the Assembly 86-42 through a wire to
the rear panel BNC.
3-39
A second format of this slow code is provided and can
be easily field converted.
If the wire from Pin #2 of Assembly
86-42 is connected to Pin #1 on the assembly, the complement of
Pin #2 described above is provided (see FIGURE 3-3).
Pin #1
output is driven by Q2 (2N3904) with approximately 6K ohm pull up
to SVDC. This will drive 2 TTL loads. When wired in this manner, the output on the rear panel BNC will be normally high. On
the minute it will go low 2 seconds, 4 s'econds on the hour and 6
seconds for a day indicator.
3-40
NOTE:
If "External Oscillator" Option is ordered in
conjuncc1on w1cn Parallel-BCD, RS-232 or IEEE-488 Output Options,
the "Slow Code" Output is not on a rear panel connector but the
user is free to lift the lid and obtain this output from Pin #1
or Pin #2 of Assembly 86-42 for use.
3-41
60 Hz
3-42
The precision 60 Hz output on the rear panel BNC, like
the Slow Code, has been provided primarily for the purpose of
supplying a known 60 Hz signal to drive synchronous motors. This
output, when supplied through a power amplifier such as the
Kinemetrics Model PA-1, will provide a constant 60 Hz signal for
driving drum recorders independent of local power line variations.
3-43
A quasi-square wave is provided for this purpose with
transitions on exact milliseconds. The half cycle periods are
8ms, 8ms, 9ms, 8ms, 8ms, and 9ms; etc., then repeating the pattern. This provides exactly a 60 Hz square wave after the average of three cycles.
3-44
Driven by U 11 on Assembly 86-42 (74LSOO) this output
is capable of driving 5 TTL loads. The output is from the front
edge of Assembly 86-42 from a bifurcated terminal labeled "60
3-9
Hz", through a wire to the rear panel connector.
3-45
EXTERNAL OSCILLATOR (Option)
3-46
If optionally ordered, this rear panel input provides
for a local lab standard type of oscillator to be utilized as a
clock time base during periods when phase lock with the satellite
is lost.
3-47
The input frequency for this option may be anywhere
between 100 KHz and 10 MHz in increments of 100 KHz.
The signal
can be a sine wave or square wave with the low level less than
0.4V and the peak greater than 2.4 (TTL).
This input is presented from the rear panel BNC through a coax to the input of U 1
(74LS74), which has a lOK ohm pull up to +5VDC.
This input
therefore is one TTL load.
3-48
Operationally, any time the Model 468-DC is unable to
phase lock to the 100 Hz data rate from the satellite, the clock
time base will utilize the provided input in the "External
Oscillator" BNC connector.
If a reference frequency is not
provided on this BNC, the 468-DC will continue to operate on its
own internal crystal.
3-49
On Assembly 86-74, a green LED has been provided (see
FIGURE 3-3) to show the user that the 468-DC recognizes the
presence of his External Oscillator.
If the LED is not lit, the
unit does not recognize the input signal and further
investigation will be necessary for proper operation of this
option.
3-50
When the situation arises that lock to the satellite is
lost, even if a cesium oscillator is used for the External Oscillator, the indications of time drift continue. Therefore, the
colons on the display and whole display will blank and flash in
the usual manner to indicate loss of satellite reception even in
case of a "perfect" external time base. The output time error
message in IRIG-B, Parallel BCD, RS-232 and IEEE-488 also function to indicate loss of accuracy.
3-51
IRIG H (Option)
3-52
When ordered, IRIG His provided on a rear panel BNC.
If this is ordered in conjunction with Parallel BCD or RS-232 or
IEEE-488, the 1 Hz described in SECTION I I I is deleted in favor
of this output. The 1 Hz is available on assembly 86-42 as described but is not on a rear panel connector. The user can easily
open the lid and obtain this 1 Hz if desired.
3-53
The
Sect ion VII I.
format of the IRIG H time code is covered in
3-54
As shipped from the factory, the IRIG-H code is in DC
Level Shift format.
This output is provided through a 2N3904 (on
Assembly 86-42) with a 3.3K ohm pull up to +SVDC. On request,
3-10
this output can be supplied as a 1 KHz amplitude modulated carrier.
In this case, the IRIG-B will be supplied as DC level
shift see SECTION III, entitled "IRIG-B (REMOTE DISPLAY DRIVING
OUTPUT)".
The 1 KHz generation and modulation system, orig inal ly used for the IRIG-B, also under "REMOTE DISPLAY DRIVING
OUTPUT", will then be used for the IRIG-H, providing a 1 KHz
carrier amplitude modulated in IRIG-H format as described in
SECT ION I II, under "IRIG-B (REMOTE DI SPLAY ORI VING OUTPUT)".
3-55
PARALLEL BCD TIME OUTPUT (Option)
3-56
The Parallel BCD Time Output option is designed to
synchronize other equipment at the time provided by the National
Bureau of Standards. This output consists of 42 lines of BCD
data from lOO's of days to units of milliseconds as shown in
FIGURE 3-4. Also included with this option are four lines to
indicate the worst case error on the time outputted. Each line
has a different error weight, they are: +500rns, +50ms, +Sms and
one indicates +lms. 1 Hz and 1 KHz lines are available on the
output connector which can be used to indicate to the user when
the BCD time data on the lines are changing states.
If this
option is included, a 50 Pin "D" connector will have been installed on the rear panel.
3-57
All of the 42 BCD lines are driven by 74HC244's and are
capable of driving fifteen LS TTL equivalent loads.
These 1 in es
are high (+) to indicate a "l" in that position in the BCD code.
The high capacity version of the Parallel BCD Time Output has
74LS244'S as the line drivers.
These drivers have the capability
to drive 100 LSTTL equivalent loads.
For further information
regarding the output of these lines and their capabilities, refer
to SECT ION VI.
3-58
The pin of each output is shown in FIGURE 3-4 on the
following page.
3-59
During normal operation, after start-up and synchronization with the Satellite, the four time quality lines will be in
a low state. When phase lock with the transmitter is lost, the
Model 468-DC will provide the user with a worst-case estimate of
the accumulated clock drift based on the VCXO drift rate. This
estimate is provided by each of the four lines changing to the
high state in turn as the clock time base drifts from synchronization with N.B.S. When the time could be worse than +l.Oms the
output on Pin #50 will go high, at +5.0ms
Pin #14 will go high
and on through Pin #17 for worse than +0.5 second accuracy. Each
of these lines is driven by an RCA fCD4050 and is capable of
driving two TTL loads or multiple CMOS loads. It will be noted
that when the +50ms line goes high, the colons on the display
will flash and when the +500ms lines goes high, the complete
display will flash.
3-11
w
I
1--'
N
PIN if
OUTPUT DATA
PIN 1F
OUTPUT DATA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GROUND
IRIG B Time Code
2's of lOO's of days
l's of lOO's of days
B's of lO's of days
4's of lO's of days
2's of !O's of days
l's of lO's of days
1 kHz
B's of units of days
4's of units of days
2's of units of days
l's of units of days
+5ms. (See Note #3)
+50ms. (See Note #3)
1 Hz
+500ms. (See Note #3)
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
2's of !O's of
l's of !O's of
B's of hrs.
4's of hrs.
2's of hrs.
l's of hrs.
4's of 10' s of
2's of lO's of
l's of !O's of
B's of minutes
4's of minutes
2's of minutes
l's of minutes
4's of lO's of
2's of lO's of
l's of lO's of
NOTES:
1)
Mating Connector TRW #DD-SOP or equivalent.
2)
Time accuracy lines in high state indicates time accuracy worse than level specified.
hrs.
hrs.
mins.
mins.
mins.
sec.
sec.
sec.
FIGURE 3-4
PIN OUT CONFIGURATION - PARALLEL BCD TIME DATA - MODEL 468-DC
PIN if
OUTPUT DATA
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
B's of seconds
4's of seconds
2's of seconds
l's of seconds
B's of lOO's M-sec.
4's of lOO's M-sec.
2's of 100' s M-sec.
l's of lOO's M-sec.
B's of 10' s of M-sec.
4's of lO's of M-sec.
2's of lO's of M-sec.
l's of !O's of M-sec.
B's of units of M-sec.
4's of units of M-sec.
2's of units of M-sec.
l's of units of M-sec.
+l. Oms. (See Note 311)
3-60
When phase lock is regained, the lines will again go low
as the unit re-corrects to the proper time. On initial turn-on
of the instrument or after a power failure, the +500ms line will
remain in the high state until the display is turned on, thus
indicating that the time on the parallel output lines is not
correct to the accuracy indicated by the other lines, regardless
of their state. This line can therefore be used as a read inhibit line since the data should not be read when this line is in
the high state. Refer to the 1 Hz and 1 kHz description below
for additional parameters on reading the time of the Parallel
Output opt ion.
3-61
The 1 Hz output line on Pin #16 is driven by a #CD4050B
and is capable of driving two TTL loads or multiple CMOS loads.
This line goes to the high state on time and remains high for
900ms.
At any time the 1 Hz 1 ine is high, the data on the
parallel output lines from the seconds level up is not changing
states and is available for reading.
3-62
If it is desired to read the milliseconds lines as well
as the seconds through days, the 1 KHz line should be utilized
as an indicator that the lines are not changing states.
The
800's of milliseconds down to l's of milliseconds are driven by
synchronous counters and may be changing states during the first
1/2 microsecond of any millisecond.
3-63
The 1 KHz line is driven by a #CD4049B and is capable
of driving two TTL loads or multiple CMOS loads.
The 1 KHz
output can provide information to the user in two formats. The
first format is as shipped from the factory. The second output
format can be converted to in the field by two simple internal
modifications. See FIGURE 3-5.
3-64
As supplied from the factory, the 1 KHz output on Pin
#9 of the "D" connector goes high on the millisecond for 100
microseconds and then goes low for the remaining 900 microseconds. Since the state of the Parallel Output Time data may be
changing state during the first 1/2 microsecond of any millisecond, the transition from the low to the high state has been
delayed to allow the milliseconds counter to stabilize. The
rising edge of the 1 kHz signal may be used as a Data Strobe.
If, rather than one point in time, a time period of when it is
"OK" to read is desired, the time period starting at the rise in
level of the 1 KHz line and continuing for the next 500 microseconds can be used.
This 1 kHz line should be used in conjunction with the +500ms line as described above to determine if
the time data is correct and readable.
3-65
The second format for the 1 kHz output line will provide an output which will go to the high state approximately 3.0
microseconds before the millisecond and low 2 microseconds later.
This line will not go to the low state if the estimated time
error of the instrument is worse than +500ms and will also stay
in the high state after initial turn-on until the data on the
parallel output lines are correct. This line, therefore, pro3-13
FIRST FORMAT (AS SHIPPED FROM FACTORY)
~
r-
100 µSEC
I
I
I
~. 5
µSEC
MIN
II
-----.....,.~~,
- - - COUNT UPDATING
l.,... ,. ,_______
1.0mSEC
SECOND FORMAT (FIELD INSTALLABLE OPTION)
5 µSEC TYPICAL
(NOT TO SCALE)
.5 µSEC
MIN
FIGURE 3-5 MILLISECOND COUNTER TIMING DIAGRAM I kHz SIGNAL SHOWN
(PIN #9 OF OUTPUT CONNECTOR)
3-14
vides one line which,when in the low state, indicates that the
time data is "OK" to read. To convert the Model 468-DC to this
configuration on the 1 KHz line, remove the bottom cover of the
instrument and locate Assembly 86-44. For identification of this
Assembly and its parts, see FIGURE 3-6 of this manual. Locate
the jumper wires (looks like a 1/4 watt resistor with one black
band) labeled JPR3.
Unsolder the end connected to the hole
labeled "A" and solder it into the hole labeled "B".
Unsolder
the jumper marked JPR2 and remove it from the board.
In the
place of JPR2, solder in a 33k ohm resistor (1/4 watt +5% carbon
-roc--1
cf-1"\"r
L
~ .::;J L ~'-''-'.I...
n
rrorl'\
.t-' r o fL o
...._..
L
"-"
L
"-
......... ..._.. . /
e
Ronl
""'"- .t'
~
:::lf"P
- -
-
rho
- ... -
('()\TPr
-
. ._. . .., - -
;:inn
- - .. -
rhP
- -- -
~rrpw~.
- .. ~ ~
:..._. ._ -
thP
- -- -
conversion is now complete.
3-66
RS-232 TIME OUTPUT (Option)
3-67
The RS-232 Time Output option, available on Model 468DC, provides time communication to the user via a bi-directional
asynchronous RS-232 port.
The output is compatable electrically
and mechanically with the E.I.A. Standard RS-232C as described
for a data terminal. Thus, the rear panel connector is a Cannon
#DBP.25PAA or equivalent. Messages are sent and received using
ASCII coded characters in most standard data rates and formats.
3-68
Units supplied with this option have a rear panel
mounted 25 pin "D" connector with the following pinout:
PIN #
1
2
3
4
5
6
7
8-24
25
*
DESCRIPTION
Chassis Ground
Transmitted Data
Received Data
*Request to send (internally connected to #5)
*Clear to send
Not Used
Signal Ground
Not Used
*Remote Display Driving (IRIG B)
These are non-standard connections which are
nonetheless compatible with most data terminal
equipment.
3-69
The unit as shipped is set for a baud rate of 300, odd
parity, one stop bit, and a word length of 8 bits.
If it is
desired to change these functions, it will be necessary to remove
the bottom cover.
Remove the four screws which hold the bottom
lid on, remove the lid and set it aside. Located on this board
are two eight position switch assemblies. One assembly is for
the baud rates of 110 to 9600 and the other is to set the parity,
number of stop bits, the work length, and other -functions as
described in the "NOTES" section, See FIGURE 3-7.
3-15
••
••
FIGURE 3-6
3-16
PARTS LOCATION - PARALLEL BCD OUTPUT OPTION
FIGURE 3-7
PARTS LOCATION - RS-232C OUTPUT OPTION
3-17
3-70
The baud
for 300, to change
position.
Select
s wi t ch to t he "0 N"
at a time.
rate switch as shipped from thefactory is set
the rate simply slide that switch to the off
the desired rate and slide the appropriate
po s i t ion. En erg i z e on 1 y one s wi t ch po s i t ion
3-71
Format selection of the parity (odd or even), number of
stop bits (1 or 2) and the word length (7 or 8 bits) can be
accomplished by the use of the second eight position switch
assembly.
PARITY
ODDEVEN
NO. OF
STOP BITS
1 - 2
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
WORD
LENGTH
7 - 8
ON
ON
ON
ON
OFF
OFF
OFF
OFF
FORMAT
Even Parity
Odd Parity
Even Parity
Odd Parity
+
+
+
+
2
2
1
1
2
1
Even Parity + 1
Odd Parity + 1
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Bits
Bits
Bit
Bit
Bits
Bit
Bit
Bit
+
+
+
+
+
+
+
+
7
7
7
7
8
8
8
8
Bits
Bits
Bits
Bits
Bits
Bits
Bits
Bits
3-72
Electrically, the levels of the outputted ASCII code
are per EIA Standard RS-232C as available from Electronic Industries Association, Engineering Department, 2001 Eye Street, N.W.,
Washington, D.C.
20006.
This reference is suggested for any
user of this system as it is the industry accepted standard for
this interface system.
3-73
With the RS-232 output option, several modes of
operation are possible. When the clock is initially turned on,
the RS-232 option automatically defaults to the once per second
output mode of operation. Refer to MODE C, in SECTION IIL The
RS-232 output opt ion will always (except ions as in SECTION I I I,
note #4, Position 6.) stay in its then current mode until one of
the ASCII control characters (C, T, F, M, P, R, U, I, S) is
received to override the previous command.
Below is a description of these modes.
MODE
C
T
F
M
P
R
U
I
S
3-18
DESCRIPTION
Transmission of the time once each second.
Transmission of the time on request.
Selection of the format for the time message.
Transmission of a mark signal at a pre-programmed time.
Transmission of the current satellite position.
Reset Mode, which resets the format to the "Default
Format" and then goes automatically to Mode C.
DUT1 Mode, transmits the DUT1 as sent by NBS
(Option) Display time without synchronization to NBS
signals.
(Option) DAMS/Health Message software.
See standard MODE S description at the end of SECT. III
3-74
RS-232 MODE DESCRIPTIONS
3-75
MODE C
3-76
When the clock is turned on, the RS-232 option automatically defaults to the once per second output mode of operation
in a format as described below:
(CTRL A) DDD:HH:MM:SS Q
WHERE:
DDD
HH
MM
SS
(CR)
(LF)
rlicrir~
- -o - - - representing
the 2 digits representing
the 2 digits representing
the 2 digits representing
a time quality indicator
is the 3
is
is
is
is
Q
()- fr1- -::lV
J
VP::lr
J - --
hours
minutes
seconds
The time quality indicators are:
?
#
*
SPACE
indicates
indicates
indicates
indicates
indicates
a
a
a
a
a
possible
possible
possible
possible
possible
error
error
error
error
error
of
of
ofof
of
+500 milliseconds
milliseconds
+s milliseconds
+1 millisecond
Tess than 1 ms
+so
3-77
When in Mode "C" the carriage return (CR) start bit
begins on the second, +0 to 1 bit time. If the maximum timing
precision is desired from this output, it is recommended that
Mode "M" be used. See the "MODEM" section.
3-78
See Notes 1 and 2, in the "NOTES section.
3-79
MODE T
3-80
When a "T"
center of the start
in a buffer.
It is
format.
No further
until receipt of one
is received, the time as of 9 bits after the
bit (of the received "T" character) is saved
then immediately outputted in the current
data is outputted on the RS-232 interface
of the valid command character sequences.
3-81
A mode similar to Mode "T" can also be initiated by an
external trigger. When the external trigger is used, the current
time is noted when the "Clear to Send" 1 ine (Pin #5) goes low
(TTL or RS-232 levels). No further action occurs until "Clear to
Send" goes high, at which point the stored time is outputted in
the current format. The unit then awaits further instructions.
3-82
Since this external trigger takes precedence over the
other modes, it is normally locked out by a jumper wire on the
option board.
If it is desired to use this mode, remove the
bottom cover of the instrument. The printed circuit board, with
the nArts fac insr vou. is the RS-232 oot ion card.
See FIGURE 3-7.
C~t ~~t or unsold~r the jumper labeled "Trigger Mode". This mode
is now in operation.
Remember when this jumper is cut, the
external trigger takes precedence over all other modes and all
other normal commands are locked out whenever "CTS" is held low.
3-19
3-83
It may also be desirable to remove the jumper at the
rear edge of the circuit which connects the "Request to Send" and
"Clear to Send" lines together (Pin 4 and 5).
This will not
affect the operation of the output option but may have an effect
on other equipment in the system.
3-84
MODE F
3-85
After an "F" is received, the unit is placed in the
"Format Mode", awaiting a time message format string.
This
format string consists of a 17 character dummy time message
consisting of day-of-year through time quality character.
As
each character is received it controls its respective position in
the output format.
An "S" in any position suppresses the output
of its respective position.
In the delimiter positions, any
character received for that position will be outputted. In the
other non-delimiter pas it ions, any character other than "X" or
any of the ASCII control characters, (see Section 3-73), since
the clock will see them as a command, allows that position to be
outputted as understood by the clock's time system. Be certain
not to use an "M" as the unit will see this as a mode change
command to Mode "M".
The format can be selected within the
limits of the maximum format described below:
(CTRL A)
DDD
HH
MM
SS
SSS
Q
(CR)
(LF)
3-86
Each
represents a single delimiter position which
can be almost any ASCII character, typically colons, a decimal
point, etc.
3-87
This format will now be the format of the outputted
time.
It should be noted that the milliseconds are not available
in Mode "C", even if so formatted.
EXAMPLE:
If the option receives: F 123/12:34:56.789Q, the result
will be printing a slash between the days and hours
with colons separating hours from minutes and minutes
from seconds. A decimal point will be in the seconds
between the seconds and hundreds of milliseconds. This
string will be preceded by (CTRL A) and followed by a
time quality indicator (Q) and (CR)
(LF).
Secondly, if F XXXXXXXXXXXXX124X is received, the result will be printing only the fractional part of the
seconds, preceded by (CTRL A) and followed by (CR)
(LF) •
As a check of the entered format, the current time will
be sent in the new format after the completion of the
17 character format string.
3-20
3-88
MODE M
3-89
This mode allows the user to preset
future and to be notified when this time occurs.
by the desired alarm time presets the time into
desired time is then echoed, and ~hen the option
time to occur. When the desired time occurs,
(this may be suppressed by the dipswitch pos,ition
board - See Note 4 in the "NOTES" section.
a time in the
An "M" followed
the unit. The
waits for that
an "M" is sent
1 on the option
3-90
As a second indication that the alarm time is present,
the unit can be converted to pull Pin #4 low during the alarm
time. This is done by moving the jumr 'r connector Pin #4 to Pin
#5, to connect Pin #4 to hole "N'. See FIGURE 3-7. When this
change is made, Pin #4 will be held low through the alarm time
and high otherwise. This form of time indication is suggested
when the user desires the highest possible time precision from
the RS-232 output on the Model 468-DC.
3-91
When one inputs the string for the alarm time, all the
delimiters must be included for place holding. An "X" in any
po s i t ion ma k e s th a t d i g i t a "don ' t c a r e" d i g i t.
I f a "L in e Feed"
is placed in any position, this terminates the string and sets
successive set time digits to O, otherwise all 16 characters
including the milliseconds digits of the time must be sent.
EXAMPLE:
Ml85*11:06:04.387
This would trip the
the 4th of July and
quest to send line
above, this would be
alarm feature at 11:06:04.387 on
an "M" would be sent. If the rehad been converted as described
held low for that millisecond.
Ml85*ll:XX:XX.XXX
This would transmit an "M" at eleven o'clock on the
same day and the request to send line would stay low
for the hour (through 11:59:59.999).
MXXX*XX:XX:XX (LF)
This in put alarm con figuration would provide for an "M"
at the start of each second and the "Request to Send"
line would be held low for one millisecond.
3-92
MODE P
3-93
When ASCII "P" is received on the Model 468-DC, the
current position as received from the "GOES" Satellite will be
outputted.
3-21
An example of the format is:
13523+013+062
Where in this example:
13523 Represents the longitude of 135.23°
+
can be + or -
013 represents the latitude of +0.13°
+
can be + or -
062 represents +62 microseconds difference in the
radius of the satellite from the nominal position
3-94
MODE R
3-95
This mode, when used, is similar to the initial turn on
sequence of the instrument.
When "R" is received, the unit
automatically goes to the "default format" and into Mode "C".
3-96
The initial output string, after an "R" command is
r e c e iv e d by the synch r on i zed c 1 o c k, i s no t r e 1 i ab 1 e e i the r a st o
data, time or carriage return.
This is due to internal
sychronization with the data rate. This is also true when the
baud rate is changed in the "R" and "C" modes.
3-97
3-22
NOTES
1.
(CTRL A), (CR) and (LF) are the ASCII characters
01, OD, and QA in hexadecimal form. They are not
under format mode control. (CTRL A) is also known
as a start of header.
2.
During output, Transmissions are continuous, with
the end of the top bit of one character coinciding
with the beginning of the start bit of the next
character.
3.
The RS-232 output option will stay in the current
mode it is in (default mode at turn on) until one
of the valid ASCII control characters (C, T, F, M,
P, R, U, I, S)
is received to override the
previous command.
4.
As described in the previous sections of this
manual, the dip switch on this option printed
circuit card has several functions. The positions
and the functions they control are:
POSITION
FUNCTION
1
Output of an ASCII M at the present
time, as programmed by Mode M' is
suppressed when ON" .
NOT USED
Parity
Number of Stop Bits
Number of Data Bits
USED
NOT
..., ________
II
II
II
2
3
4
5
6-,
I
.:>uppi:e:::;:::;
//"1ITIT'I T
\ l.J l I\.L
A'\
ft)
in
..J_.c_ •• , ....
Ut::1.dU.LL.
.C~-- _.._
lVLllldL.
--1--Wllt:!Ll
ON"
Suppress colons in default format when
"ON"
II
8
3-98
5.
Input and out put is via an MC6850 AC IA. Re fer to
manufacturer's (Motorola) data sheet for further
information.
6.
Effective spring of 1984, the National Bureauof
Standards began including extended satellite
position data and parity err9r information for the
purpose of providing users with a higher degree of
timing precision with respect to UTC. This data
is accessible through the use of ASCII control
characters "E" and "S". These new modes function
in the following manner:
MODE U - DUT1 MODE
When the Model 468-DC receives a "U" over the RS-232
3-99
interface, the response will be the current correction to UTC-NBS
to obtain UT1.
This correction is transmitted via the GOES
Satellite Time Code and is referred to as DUT1.
The RS-232
message consists of 3 items.
1)
2)
3)
Sign of correction
3 digit correction in milliseconds
(CR)
(LF)
3-100
The sign is a "+" or a "-", indicating that the
correction must be added to or subtracted from UTC-NBS to obtain
the proper value for UT1.
3-101
The 3 dig.it correction is normally transmitted as an
integral number of hundreds of milliseconds, such as +400.
Thus
the last two digits should always be zero.
3-102
Four question marks (????) will be transmitted
successive transmissions of DUT1 do not agree.
if
3-103
A complete description of the information transmitted
by WWVB is described in SECTION IV.
3-23
3-104
MODE E
11
11
3-105
When an ASCII E is received on the 468-DC, the current satellite position with the extended resolution will be
output.
An example of the format is:
123.4567+1.2345-123.4
Where in this example:
123.4567
+
1.2345
123.4
3-106
Represents the longitude of 123.4567 degrees
can be + or Represents the latitude of+ 1.2345 degrees
can be + or Represents -123.4 microseconds difference in
the radius of the satellite from the nominal
position.
I-MODE (Option)
3-107
This option is intended to permit the user to preset
the clock to any desired time, without waiting for the clock to
automatically synchronize to N.B.S. time. Once preset, the clock
outputs will function normally as if N.B.S. sync has been
obtained.
If an antenna is connected, switchover to N.B.S. time
is either automatic or under user control at the user option.
3-108
While the preset time
are provided to alert the user:
the RS-232 link to set to 110 "
modified; on 468-DC the two
alternately illuminated.
is being output, two indications
the time quality character over
and the front panel display is
satellite indicator LEDS are
3-109
An attempt to set the clock after N.B.S. sync has been
ob t a i n e d w i 11 r e s u 1 t in t he r e s po n s e " DO Y0 U RE ALLY WANT T0
PRESET THE TIME ?" Any answer other than (Y)ES will abort the
attempt. A (Y)ES answer will restart the clock as if the power
had been interrupted.
At this point another "I" will allow
presetting the clock, without the previous question.
3-110
To set the time, send an "I" to the clock, followed by
the desired preset time in the format DDD:HH:MM:SS. This input
line can be edited using a backspace (control H). All characters
to the right of the correction made must be re-entered after the
correction.
When the input line is correct, carriage return
enters it into a temporary buffer, and echoes the time for
verification.
This echoed back time has been examined for valid
upper and lower bounds. A question mark (?) will be placed in
any location that is not valid. As an example 432:13:10:11 would
return ?32:1?:10:11 if the clock is set in 12 hour format and
3-24
?32:13:10:11 if set in 24 hour format.
At this point the user
must enter the desired preset time, and the same verification
process will occur. After a valid time is entered, a line feed
will then set the clock if in 24 hour format and ask the
following quest ion if in 12 hour format. "IS THE TIME PM?". Any
answer other than (Y)ES will be interpreted as AM.
3-111
After the clock has been preset (with the Line Feed)
the clock will ask:
"AUTOMATIC N.B.S. SYNC ?" A response of
(Y)ES will institute an automatic change-over to N.B.S. time when
it becomes available..
Anv resoonse other than (Y)ES will.
institute a change-over oO'ly af'"ter the following handshake
sequence: when the clock obtains N.B.S. sync, it sends "SYNC OK
NOW". From this point the user sends a Line Feed to initiate the
change-over.
3-112
When an "R" is entered to initiate the reset mode this
will initiate an RS-232 software reset and place the user in "C"
MODE under the internal N.B.S. time storage buffer.
If the
N.B.S. time is valid, the correct time will be displayed on the
clock.
If the clock does not have val id N.B.S. time, then what
ever time is in the buffer will be output.
The time quality
character will discriminate against the two times. There are
three areas in "I", MODE where an "R" wi 11 not initiate a reset of
the RS-232.
These are after the questions "DO YOU REALLY WANT TO
PRESET THE TI ME?" , "AU T 0 MAT IC N. B. S. SYNC ? " and " IS THE TI ME
PM?". The user must first respond to the quest ion and then may
enter an "R" reset.
3-113
During the transition periods of "I" TIME with N.B.S.
TIME, all outputs will no longer be valid.
The active mode
during "I" MODE TIME will also be the active mode after the
transfer to N.B.S. TIME.
As an example, if "C" MODE is used
before the N.B.S. transfer takes place, then after the transfer
"C" MODE will still be the active mode.
3-114
DAMS/HEALTH MESSAGE SOFTWARE (Option)
3-115
When
this
option
is
ordered
with
the
Kinemetrics/TrueTime Model 468-DC the capabilities of the RS-232
output option described in this section are modified.
The
purpose of this software package is to assist the users of the
National Environmental Satellite Services (NESS) "GOES" data
collection system to check the quality of the uplink
transmissions of any given platform under actual operating
conditions. This can be per formed in the lab before an on-site
visit or in the field during the actual installation or repair.
3-116
We will first briefly describe how the "DAMS Test Mode"
works. This Test Mode utilizes three portions of the NESS ground
system to measure, format and transmit this performance information back to the field.
3-117
As each platform message is received at the Wallops
Command and Data Acquisition Station, measurements of the signal
3-25
strength, frequency, modulation index and modulation quality are
made by the "Data Acquisition and Monitoring Subsystem" (DAMS).
This in format ion is passed to the Wallops computer where it is
interpreted and, for selected platforms, a command message is
formatted.
The command is then transmitted back through the
"GOES" satellite utilizing the Data Collection Platform
Interrogation Transponder.
This message appears to the Model
468-DC as a platform address at first glance.
3-118
Since the Test Mode has been designed to provide
information to many DCP' s at the same time, the command message
consists of two parts. The first is an address sequence which
identifies the platform for which the data is intended.
The
second part is one of 4096 unique addresses which have been
reserved for this purpose.
The Model 468-DC with the DAMS/HEALTH
Message Software option has the ability to first select and trap
only the message for the platform the user is interested in
(based on the user entering his platforms primary address) and to
decode the hexadecimal transmission of the platform status or
"HEALTH" into English.
3-119
This Test Mode can be used will all types of DCP's
interrogated, self-timed, random reporting and international.
All that is required to activate the Test Mode for any platform
is for the NESS computer system to be told to place that
particular platform in the "Test Mode".
This can be done by
c a 11 i ng t he DC S 0 PE RAT 0 R a t (3 0 1 ) 7 6 3 - 8 3 5 1 and g iv i ng t he
platform "PRIMARY ADDRESS" and asking to have this platform
placed in the "Test Mode".
This also can be done directly by
computer, consult your "GOES-DCS USERS INTERFACE MANUAL" for the
procedure.
After placing the platform in the Test Mode, any DCP
message received from that platform will generate a DAMS/HEALTH
Message.
In addition, if the platform is interrogated or is
scheduled to transmit, the NESS computer will transmit
DAMS/HEALTH Message even if no message is received. This will
tell the technician in the field or lab that the DCP didn't work
at all.
3-120
The first step in the use of this unit is to set up the
unit as for the reception of time as described in SECTION I I of
this manual.
The second step unique to utilization of the Model
468-DC for the Health Message, is to insure that the proper
satellite is selected for reception.
Be certain that the "EAST"
or "WEST" satellite selection switch is set properly for your
application.
See the description under "EAST, WEST, AUTO,
SATELLITE LOCK SWITCH" operation in this section.
3-121
After the unit has locked onto the proper satellite and
the display has come on with the correct time, you are ready to
use the Model 468-DC in the DAMS/HEALTH Message Mode. First, an
RS-232 terminal must be connected to the output port of the Model
468-DC.
For purposes of this manual it will be assumed that a
G.R. Electronics Ltd. "Pocket Terminal" is used, use of other
terminals will be virtually identical.
It should be noted here
that one main difference in the Pocket Terminal and other
3-26
terminals is that the display on the Pocket Terminal has only 8
characters visible at one time on its 32 character display
memory. Thus the "SL4" (shift left 4) and "SR4" (shift right 4)
keys are used to view the complete message as needed.
3-122
When the terminal is first plugged in, you will note
that once per second the time is sent to~the terminal by the
Model 468-DC.
You will also note that two flashing decimal
points on the display can be moved left and right by using the
"SL4" or "SR4" keys.
The proper place to start is with the
decimals one character from the right (press SR4 several times).
DAMS/HEALTH MESSAGE SET UP KEY STROKES
3-123
3-124
The first step in obtaining the Health Message is to
enter the "primary" platform address for the respective platform.
The key strokes for platform 75C093C6 would be:
1)
"S"
This tells the Model 468-DC that the next
eight digits will be the primary address of
the platform for which data is desired.
2)
"75C093C6"
This enters the eight digit address of the
platform desired.
3)
"SHIFT"
This prepares the terminal to send an "upper
case" of the next key stroke.
4)
"CR"
This "carriage return" enters into the Model
468-DC the eight digits keyed into the
terminal in Step #2.
NOTE:
The display on the Model 468-DC has now converted from
a nine digit time-of-year display to an eight digit address
display. the 9th digit is not significant, and as new platform
addresses are received they will be displayed in turn on the
panel display.
Since it is possible to receive addresses at the
rate of one each 1/2 second these digits may change at that rate.
3-125
VERIFICATION KEY STROKES
3-126
"X"
When this key is struck, the Model 468-DC responds
with the current platform primary address for
which the unit has been programmed.
It is al ways
wise to verify the entered address after the "CRn
is entered to assure there are no errors. If you
have incorrectly entered the address, simply
repeat steps 1) through 4) above.
3-127
"Z"
This key stroke will provide the user with one of
f-'J............,
l.LIC:
1)
.f="l 1 "-r_,..,: ........ ,...
l.V.L..L.VWl.llO
114,.....,..,....."-~,.,"",., •
LC:l::>J!Vlll::>C:l::>o
"DAMS FULLY OPNL"
This indicates that
everything is operating properly, both at the
users end and at NESS.
3-27
2)
11
3)
"NOT LOCKED TO SATELLITE"
This indicates
that the Model 468-DC is not locked to a GOES
satellite.
4)
"DAMS NOT OPNL" This tells the operator that
lock is achieved, but no "Health Message" is
being transmitted.
SCHEDULED S.T. ONLY" Tells the user that a
problem exists in the link between the World
Weather Building and interrogated platforms
are notpolled, thus no Health Message is
available at this time.
3-128
Until the sequence outlined in the following paragraph
is complete, striking keys G, H, I, K, or L will result in the
term in a 1 response of "NO DA TA YET".
This ind i cat es that the
Model 468-DC has not received the Health Message for the platform
yet (in this example 75C093C6).
3-129
At this point the user must wait for the following to
happen (or cause it to happen):
3-28
1)
Your platform to respond through the
when it is poled (75C093C6 in this
respond in its assigned time slot if
platform, or be triggered to respond
technician.
"GOES" system
example) or
a self-timed
by the field
2)
Next the Wallops Command and Data Acquisition
Station will receive your message, measure the
signal strength, frequency, modulation index, and
modulation quality. Once this is done the Wallops
computer interprets the data and forms a command
message.
This message is then transmitted over
the Data Collection Interrogation Link which
appears at first to be a platform primary address.
3)
The Model 468-DC with the DAMS/HEALTH MESSAGE
SOFTWARE option will recognize this message as
yours (since we keyed in our platform's primary
address earlier).
The unit will then lock this
eight digit ASCII code on the display and decode
it into English through the RS-232 terminal.
You
will note that when this occurs, the left three
digits of the clocks display will show "OCd".
This is due to the fact that the 9th digit is not
used, and the 8th and 7th are ~~~ "Cd" for a
Health Message.
4)
It should be noted that this DAMS/HEALTH MESSAGE
will now be locked onto the display (starting with
"Cd") and you may scroll through the commands
listed below under "DAMS/HEALTH MESSAGE
INFORMATION KEY STROKES", as often as needed until
the unit is reset by one of several commands.
the "OPERATING NOTES" that follow.
3-130
DAMS/HEALTH MESSAGE INFORMATION KEY STROKES
KEY
STROKE
3-131
See
RESPONSE
"MESSAGE RECEIVED"
or
"MESSAGE NOT RCVD"
"H"
"MESSAGE GOOD"
or
"PARITY ERROR(S)"
"I"
"MODULATION GOOD"
or
"MODULATION BAD"
"J"
"ZERO"
or
"ONE"
"K"
"XMIT POWER SB 45-49 IS XX"
(Where "XX" is between 26 and 56)
"L"
"XMIT FREQ. SB +250 IS YYY HZ:
(Where "YYY" is-between +700 and -800)
(NOT USED)
NOTE:
IN ORDER TO VIEW THE COMPLETE ENGLISH MESSAGE AS
DESCRIBED ABOVE WHEN US ING THE "G.R. ELECTRONICS LTD." TERMINAL
IT IS NECESSARY TO SCROLL LEFT (SL4) OR SCROLL RIGHT (SR4).
3-132
It is assumed at this ooint that the technician has
made the needed adjustments to his platform and will desire to
reset the Model 468-DC to once again look for the DAMS/HEALTH
MESSAGE for his platform. This can be done by one key stroke:
"Y"
3-133
This wili re_set previously set platform address into
the Model 468-DC to again capture the DAMS/HEALTH
MESSAGE for same primary address. (In our example
75C093C6 is automatically re-entered as if the "S" key
and the 75C093C6 plus CR were struck).
OPERATING NOTES:
1)
Any RS-232 terminal used with this software option must
be set up to operate with this RS-232 outr.ut port as described in
this section of the manual.
If the 'G.R. Electronics Ltd."
terminal has been purchased from Kinemetrics/TrueTime this set up
is complete as received into the panel mounted RS-232 connector.
2)
When the "DAMS/HEALTH MESSAGE SOFTWARE" option is
ordered,- several of the commands described in the previous
section "RS-232 TIME OUTPUT (Option)" have been changed to
facilitate the use of this software.
3-29
KEY STROKE W/O DAMS (see)
RS-232 TIME OUTPUT
"C"
"F"
DESCRIPTION
Time once per second
Format time message
All other commands described
section, are unchanged.
NEW KEY STROKE
WITH DAMS OPTION
"O"
"Q"
in "RS-232 TIME OUTPUT",
this
3)
Once the Model 468-DC has entered into the "S" Mode by
the entry of your platform address and striking the "CR", care
should be used in entering any other letters. If any letters
other than G, H, I, K, L, X, Y or Z are entered the Model 468-DC
will be removed from the "S" Mode and will not trap and retain
the Health Message you are interested in.
4)
When the system has been properly set up as described
above and the Health Message has been "trapped", the "Information
Key Strokes" (G, H, I, Kand L) can be re-struck as many times as
necessary and stroll~d through time and time again until another
key is struck. The next entry might be "Y" since you just made
the appropriate adjustment to your DCP and now desire to get
another set of data from Wallops after your platform responds
again.
3-134
3-135
IEEE-488 OUTPUT (Option)
INTRODUCTION
3-136
The IEEE-488 output option is available on the Model
468-DC to provide the user with a communication port via the
IEEE-488 bus. This option is compatible electrically and mechanically with the IEEE-488 standard 488-1978. Messages are sent
and received using strings of ASCII coded char~cters.
3-137
HARDWARE
3-138
The user interface with the option is through a
standard IEEE-488 connector. The "BUS ADDRESS" is set by a dipswitch on the output option circuit card. To access this switch,
remove the four screws which hold the bottom cover in place and
remove the cover. Note the circuit board in the center with the
components facing you. Toward the edge of the board nearest the
front panel you will find the 8 position switch. The "Address"
is set using positions 1-5 of this switch. This switch encodes
the address in binary format:
WHEN
WHEN
WHEN
WHEN
WHEN
POSITION #1 IS
POSITION #2 IS
POSITION #3 IS
POSITION #4 IS
POSITION #5 IS
POSITION #6, 7
THE ADDRESS OF THE
ENCODED BITS.
3-30
ON" A BINARY 1 IS ENCODED
!'ON" A BINARY 2 IS ENCODED
ON" A BINARY 4 IS ENCODED
"ON" A BINARY 8 IS ENCODED
II ON"
A BINARY 16 IS ENCODED
AND 8 NOT USED
INSTRUMENT IS 'THEN THE SUM OF THE
II
II
3-139
The Model 468-DC is shipped from the factory wit~ an
address of 11 5 ". Therefore, switch numbers 1 and 3 are "on" and
all others are in the "off" position.
EXTERNAL TRIGGER
3-140
3-141
Also located on this circuit board are two terminals.
One is provided for "EXTERNAL TRIGGER IN" and the other "EXTERNAL
TRIGGER OUT". These are not provided on rear panel connectors
but are available for the user to bring out if he desires. The
use of these triggers will be covered under "MODE T".
SOFTWARE
3-142
3-143
Communications over the bus take place using strings
of ASCII characters as mentioned earlier.
The output strings
from the clock are always terminated by a Carriage Return, Line
Feed sequence. The Bus management "EOI" is asserted for
the
line feed character.
The longest string of characters output by
the clock on the bus is 20 characters including the carriage
return and line feed.
3-144
Inputs to the Model 468-DC are also strings of ASCII
characters. Whenever a string is input to the unit, a Line Feed
or EOI will terminate the string and no action is taken on that
string until this termination is received.
Input strings are
stored in a 32 character buffer which wraps around when
overflowed. This will cause the 33rd character received to be
stored in the first position and so on.
3-145
Operation of the clock outputs on the bus is organized
by six different modes. A particular mode is initiated by sending
the clock a string containing a mode-defining character.
The
first valid mode-defining character in the string received defines the mode the clock will be set in.
The valid mode characters are:
3-146
F
FORMATTING OF THE TIME MESSAGE
M
MARKED TIME (ALARM CLOCK MODE)
N
VERIFICATION OF MARKED TIME IN MEMORY
p
POSITION INFORMATION OF GOES SATELLITE
T
TIME
MODE F
3-147
This mode allows the user to establish a desired format
for the time message. The format is determined by the strings of
ch a r a c t er s sent to the u n i t f o 11 ow in g the rec e i pt o f the "F 1 ' .
This format string consists of 17 characters to format the time
response of the clock. Each character in the string controls its
3-31
respective position in the new output format of the clock.
3-148
An "X" in any position of this string suppresses the
output of its respective position of the time message.
The
positions between the days and hours, the hours and minutes, the
minutes and seconds, and seconds and thousandths are referred to
as delimiter positions.
Any character inserted in the input
string to format the clock in these positions will be repeated in
that position.
3-149
The format of the
limits of the maximum format:
unit can be selected within the
DDD_HH_MM_SS_tttQ
3-150
Each "" above represents a delimiter position and can
be any ASCII character except "X".
EXAMPLE:
If the option port receives: Fl23/12:34:56.789Q, the
resulting response by the clock will be the day of
year, a slash, the hours, colons, the minutes, colons,
the seconds, a period, the thousandths carriage return
and 1 ine feed.
Secondly, if FXXXXXXXXXXXXX124X is received by the
unit, the resulting response will be printing only the
fractional part of the second followed by a carriage
return and line feed.
If the format string is terminated short of the 17
characters, the positions in the time string after the
termination of the format message will be unchanged by
the format operation.
3-151
MODE M
3-152
This mode allows the user to preset a time in the
future and to be notified when that time occurs. An "M" followed by the desired alarm time presets that time into the unit.
When the desired time occurs, a "service request" is initiated
and the external trigger output line (see SECTION III, entitled
"EXTERNAL TRIGGER" is set low. When the preset time has passed
the external trigger line is returned to the high state.
3-153
The service request will be cleared by a device clear
command, by setting a new alarm time, by reading the alarm time
using mode "N" (see SECTION III, entitled "MODE N") or by a
serial poll.
The status byte returned in a serial poll is an
ASCII "M". NOTE: This is in conflict with at least Tektronix
standards for the IEEE-488 bus.
3-154
When an alarm string is input, all of the delimiters
must be included as place holders.
An "X" in any position makes
3-32
that digit a "don't care" digit. If a line feed is placed in any
position, the string is terminated and sets the successive d~gits
t
0
II
O".
EXAMPLE:
•• .,f"\r- ...•... , ,
nr
l'\I
"lot
lVJ l 0 ::> "" l l : U 0 : U 4 • ) 0 I
This input to the unit would trip the alarm feature at
11:06:04.387 on the 4th of July and the external trigger would be
held low for that millisecond.
MXXX*XX:XX:XX
(line feed)
3-155
This program configuration would provide a service
request at the start of each second and the external trigger
output line would be held low for one millisecond.
3-156
MODE N
3-157
Mode "N" is provided for the purpose of verifying the
alarm time programmed into the unit.
When the Model 468-DC
r e c e iv e s an "N" the r e s po n s e wi 11 be the pr e v i o us 1 y pr o gr am me d
time in the ''M" mode.
After transmitting the complete time
string, the model 468-DC returns to "M" mode.
3-158
MODE P
3-159
Whenthe unit is placed in the "P" mode, the current
position of the satellite being received is outputted on the bus.
This position information is provided over the satellite link by
the National Bureau of Standards for the purpose of determining
propagation delay of the received signal at the user's site.
This position information is based on predictions of the satellite 30 days in advance and, as such, has obvious limitations.
Currently, the National Bureau of Standards only provides certainty that this information is accurate to ~100 microseconds for
propagation delay calculations.
3-160
Kinemetrics/Truetime makes no claims as to the accuracy
of this information but does provide it
f ,.... ...
.L V L
t-ho
\...LJ"'-
11cor
UU\,.,....L
interested in this information.
3-33
EXAMPLE OF CLOCK RESPONSE:
10523+013-062
Carriage Return Line Feed
Where:
10523
represents the longitude of 105.23° West
+
Can be + or -
013
represents the latitude of +0.13°
can be + or -
062
3-161
represents -62 microseconds difference in the
radius of the satellite from the nominal
position.
MODE T
3-162
When a "T" is received, the time as of the completion
of the handshake of the string terminator (LF or EOI) is saved in
a buffer. This saved time can then be read out by addressing the
clock as a talker and retrieving the time message. If the unit
has not had a format specified by the "M" Mode, the default
format of the time response will be:
DDD HH MM SS.tttQ carriage return line feed
This format being day of year, hours, minutes, seconds, milliseconds and time quality character. This is 19 characters incuding
the carriage return and line feed.
3-163
"Q" is the time quality character showing the estimate
of worst case time error:
WORST CASE ERROR
MORE
MORE
MORE
MORE
LESS
THAN
THAN
THAN
THAN
THAN
+ 500 ms.
+ 50 ms.
+
5 ms.
ms.
1
+
+
1 ms.
ASCII CHARACTER
?
#
*
(ASCII SPACE)
If a format change is desired see SECTION III, entitled "MODE F".
3-164
Either a Group Execute Trigger command or a positive
transition on the External Trigger In line will also catch the
time for output when read.
If a "T" or a Group Execute Trigger
is received, the time will be caught whether or not any previously caught time has been read. The External Trigger In line will
ignore the positive transitions after the first one, until the
time has been completely read out.
3-34
SAMPLE PROGRAMS
3-165
3-166
To help the user in learning to interface their IEEE488 System to the Kinemetrics/Truetime Model 468-DC with IEEE-488
output, below are sample programs. These programs are direct
print-outs and proven to operate with the Model 468-DC. We trust
these will be of assistance. Most of the problems encountered by
users in initially interfacing with the Model 468-DC on the "bus"
seem to have been in specifying the clock's address, and in
properly handling the terminating sequence of , which
the clock needs and supplies.
1.
HP 9825A Program:
u~
2.
REM
LIST
**
.- . ·i
:i··
(:';
i
~
:~~~ ~:.
:::'.
~
1;;= ,., ':
r ~~~ oJ
·r :t.: c~~ ~J J
i .i ~~
1
f'1 :f
HP 9830A Program:
TRUE TIME 60DC CONTROLLED BY H/P 9830A.
**
27 FEB 81
**
5 DIM A$[ 20 J
1(1 CMD "?U"
20 FOF.:MAT E:
30 OUTPUT (13,20)768;
4~?. CMD II ?U~~ II
50 OUTPUT ( 1 ~:'*>II FDDDDHHHMMM::;:::::: 1111"
55 CMD "?U\
6(1 OUTPUT ( 13' *)II T"
65 CMD "'?'E5
70 ENTER (13,*)A$
::: [1 DI ::; P .. TI ME : " As c 1 , :::: J " DA 'r' , •· A:t c 5 , t: J II H~: ::: " A$ [ s , ·:;. J .. Mrtr ::: II A:n n , 12 J .. ::: Ec ' ·:;
10(1 GOTO 55
110 EMD
11
11
3-35
3. "PET" Program:
Program to set tiffie strinq format and read time
via the IEEE-488 bus using a PET
fro~
True Time clack.
Informs PET of clock"s address on the bus
10 OPEN 5,5
20 PRINT#5,aFDDDXHHXMMXSSXTTTXn Sets clock for1at to omit delimiters.TD flaa
30 PRINTts, Ara
instructs clock to catch time
Reads time from clock
Displavs time
40 INPUT#5, A$
50 PRHH A$
4. SYSTRON-DONNER 3520 Program:
PROGRAM TO READ TRUE TIME CLOCK USIN6 SYSTRON-DONNER MODEL 3520 'BUSSER'
10
3-36
BUS CLEAR
BUS ADDRESS 00101
Just in case
20
30
BUS PRitWT"
40
BUS IN
Address clock as listener; send "T"
Address clock as talker; read&display ti1e
5
in
binary
strin~
3-167
D.C. POWER INPUT (Option)
3-168
The D.C. Supply Option is available at extra cost and
is installed in place of the standard 95-135 VAC 60-400 Hz power
supply. This option allows the clock to operate from direct
current sources of a nominal 12 or 24 VDC ratings.
The D.C.
Supply option will operate with an input voltage between the
absolute limits of 11 and 30 V.D.C. The power required will be
approximately 20 watts, depending on the other options installed
and the input current will decrease as the input voltage in3-169
Power connection is made through a pair of "5 way
binding posts" located on the rear of the unit.
They are spaced
3/4" apart to accept the common "double banana plug". The positive terminal is red and the negative terminal is black. Neither is connected to the chassis ground.
3-170
50us TIMING (Option)
3-171
This option may be specified at the time of order when
two or more Model 468 Satellite Synchronized Clocks are purchased.
It provides for the selection and adjustment of all
clocks in the order group to provide the user with 50 microsecond
timing correlation between clocks when several operating conditions are met.
3-172
The conditions necessary to assure the 50 microsecond
timing correlation are:
1)
All clocks are receiving the same satellite (GOES
EAST or GOES WEST). See SECTION III, entitled
"AUTOMATIC/MANUAL SATELLITE SELECTION".
2)
The receiving antenna must be properly aimed at
the satellite being received. An error in pointing of no more than 30' is allowable. See SECTION
II, entitled "ANTENNA INSTALLATION" for antenna
pointing information.
3)
Both units have maintained 100 Hz data lock for a
minimum of 1/2 hour. Momentary local interference
will probably not deteriorate the timing agreement.
4) The antenna of each unit has an unobstructed
view of the satellite. This means that there must
be no reflecting surfaces which will create strong
multipath interference. By multipath, we mean the
antenna receiving the satellite signal from both
the satellite directly and after bouncing off of a
nearby reflective surface.
5)
The ambient temperature difference of receiver to
receiver is held within l0°C. The ambient temper3-37
ature difference of antenna to antenna is also
held within l0°C.
6)
3-173
When the propagation path differences have been
properly taken into account.
This is intended to
be the propagation path from the satellite used to
each clock in the system at any time during the
period when the 50 microsecond timing accuracy is
expected.
The distance between clocks over which
this "propagation" difference can be held within
an acceptable range will vary from one user's
network configuration and geographic location to
the next.
It is therefore recommended that the
factory be consulted with the configuration, distances between units, and geographic location for
your system to assist in the determination of the
applicability of this option to your needs.
DAYLIGHT SAVINGS TIME CORRECTION
3-174
Effective spring of 1984 the National Bureau of Standards began including two bits in the "GOES" time code to inform
the user when the United States is on Daylight Savings Time.
3-175
For users who are operating the Model 468-DC with the
"HOURS OFFSET" (See Sect ion I I I, entitled "HOURS OFFSET") on the
rear panel set to "O", this change in the time code will not
affect your displayed or output time. This will allow these users
to continue to function in "UTC" which is unaffected by the DST
laws.
3-176
For those users with the "HOURS OFFSET" Switch set in
positions -4 thru -11, the Model 468-DC will automatically correct for the change between DST and Standard Time. Both the
displayed time and any electrical output of the time will be
changed to provide the user with this change in local time. A
small switch, located adjacent to the 12/24 Hour Select Switch on
the Digital Board (Assembly 86-42), will enable or inhibit the
automatic DST correction.
(Refer to FIGURE 3-3). With this
switch in the OFF position the automatic DST correction will be
applied.
Those users located in areas which do not observe U.S.
Daylight Savings Time will want to operate the 468-DC with this
switch in the ON position to continue to display the correct
local time.
RS-232 STANDARD MODE S
3-177
3-178
When an ASCII "S" is received on the 468-DC, an ASCII
number from 0 to F or an "*" will be returned. Interpretation of
this is as follows:
*
0 - 7
3-38
Means the clock is currently not synchronized
Represents the satellite position accuracy expectation
value.
Interpreted as a number N which is used in the
following equation to give a deviation in microseconds.
2 [2N+l] =
~
number of microseconds.
Normally this number will be a 3, which is equivalent
to an expected accuracy of no worse than +128
microseconds.
8
Means that a parity error was detected in the position
data.
Combinations of expectation value and parity error are
acceptable. For example a "B" would represent a parity error and
an expectation value of 3 which is equal to +128 microseconds.
ADVANCED PERFORMANCE OPTION
3-179
3-180
The 468-DC Advanced Performance Option consists of an
additional printed circuit board (86-147), modifications to the
analog board (86-74) and digital board (86-42), and additional
firmware. The following features are provided by this APO:
1)
10 to 1 improvement in resolution of propagation delay
compensation (100 microsecond increments).
2)
Automatic selection of proper delay compensation for
each of the three GOES satellites (East, West, and
Spare).
3)
Positive identification of the satellite whose signal
is being received.
4)
Reduced timing error
millisecond or less).
5)
Improved internal time base stability (1 x 10-6)
6)
Loss of lock indication in IRIG-B time code output.
when
switching satellites
(1
3-181
FIGURE 3-8 is a block diagram of the baseband data
phase-lock-loop circuits.
The new circuits for the Advanced
Performance Option are shown in the lower right corner, within
the dashed lines.
The seek/trace, lock/freeze, and fine/coarse
switches are solid state switches controlled by signals of the
same name that originate at the digital processor board (86=42).
The normal acquisition and tracking operation of these switches
is explained in SECTION IV of this manual. The switches are
shown in their normal tracking position, where the fine phase
detector and fine VCXO are part of the data loop.
3-182
A more detailed block diagram of the option circuits
only is shown in FIGURE 3-9.
3-183
The 86-147 PCB has nine ten-position switches that are
set by the operator. The switches are in groups of three, marked
3-39
w
~
I
~
~
C'l
0
100 Hz
LOCK
DETECTOR
c:
~
~
r
-
\,,lo)
TP4 9--
I
E DATA
00
,
~
=
~
>
en
r
DATA
DETECTOR
=
~
c
D
100 Hz
....
-....
T0
D
~
;en
tr.i
rP3
,.
~
1J
n
tJ I 5-8
'~
~
,.
~
I
t:""'
0
0
.t..
TS.5
--
.it!..
T4.5~
osc.
Tf -E-
~v
COARSE
PHASE
DETECTOR
~~]~
L/F
""d
t T
n
T0
~
~
0
lD
~
1-i
en
--
T9.S
f"A OM
I
t:""'
0
F/C
.-
1 MHz
COARSE
c
>
>
DATA
.J_
tr.i
1-i
100 Hz LOCK SIGNAL
_..,,
r
10 MHz
FINE
~
osc.
10
_...
~
~--r
-:- 100
±
T9.5
I-+
-:- 10
_f
~ TRACK
_J_
j
10
4. . . ADDRESS
4..J.. DATA
100
Hz
~
.i_
s
......
~
..-~-------'-.,
o
--.....
~
--· --- --- --- - --~-S]!:J________ -- -f-------------------- ~--.
~
FINE
PHASE
DETECTOR
·~
F/C
,
IRIG B
MOD.
OUT
_f
T4.5
T5.5
-:- 100
5
'~
MHz
MK 1. 5 CIRCUITS
,
1------~_\,,_ 1 kHz
~
1-1
PROPAGATION
DELAY SWITCHES
C':>
c:::
~
I
"°
47 ~ ,,.'-
10
w
EAST
4 ,/ "'
1.0
7
4L."'-..
7
)
DATA
1
4..L
"'/
-,
t:X'
["'4
~
7
7
0
0
C"l
41
MUX
0.1
>
'"'d
7
WEST
0
10
1.0
4L '-
.___.
7
I
...,, ,
3~
,
4_L_ \,.
77
0.1
1-1
>
C':>
~
41
,
~3, .....
....
4 ,/ \...
/
10
SPARE
7
41
'
7
/
1.0
4 ..L
0.1
/
.....
7
HUX
2
4.L
7
...y
~1
PULSE
SELECT
..,..
,,....
)'10
""
7
7 100
IRIG
MODULATOR
PULSE
SHAPER
r-L
RESET
I RIG IN
.../
'"lllf"
>-
LS
..:...
10
OUT
> MODULATED OUT
>l
,~
1 MHz
ADDRESS
kHz
'EAST', 'WEST', and 'SPARE', respectively. Each switch is labeled '10', '1.0', or '0.1', indicating the multiplier value of the
switch setting in milliseconds.
3-184
The operator must know the 468-DC location to within
18.6 miles (30 km). This is 15 minutes (1/4 degree) of latitude
or longitude. The propagation delay can be determined by running
the program shown in FIGURE 3-10, or by calling Kinemetrics/
TrueTime at 707/528-1230. The operator then sets the switches to
the correct setting.
EXAMPLE:
The operator has determined that propagation delay for
the East GOES satellite should be 37.4 milliseconds.
On the 'EAST' group of switches, the '10' switch would
be set to '3', the '1.0' switch to '7', and the '0.1'
switch to '4'.
3-185
The satellite selection switches, previously on the
digital board assembly, are now on the option board. Operation
of the switches is the same as before (see SECTION III,
"AUTOMATIC/MANUAL SATELLITE SELECTION").
3-186
The VCXO drift is reduced by clamping the 10 MHz fine
oscillator DC input voltage to a fixed value that was set when
the receiver was calibrated. Component and crystal aging will
still cause an increasing error with time, but cla~ping the input
is more accurate than allowing the integrator to drift to one of
the supply voltage rails. The time quality flags are set for an
error rate of approximately three milliseconds per hour. This is
much worse than actual measurements have shown, and allows for
crystal aging. Reference SECTION III, "DISPLAY", SECTION VIII,
"CONTROL FUNCTIONS".
3-187
When the operator selects either the East or West satellite, the selection data is compared against the received
signal to verify that the receiver is phase locked to the correct
satellite signal. The satellite signals contain position information as part of the data stream. This position information is
decoded and compared to positioh data stored in memory. The
correct signal is being received when the data stream information
and the position data in memory are compared, and found to agree.
In non-'Automatic' mode, if the receiver is locked to the wrong
signal, the sweep will continue until the correct signal is
found.
If the receiver has not found the correct signal after 10
to 20 minutes, the operator should check the antenna pointing
direction, or select the other satellite. In the 'Automatic'
mode the receiver locks to the first satellite signal it finds,
whhich can be either East or West.
3-188
With the Advanced Performance Option, timing errors are
minimized when the operator switches satellites, or the receiver
3-42
switches satellites due to low signal-to-noise. This has been
achieved by the extra propagation delay switches, reduced VCXO
drift, and removal from the data loop of the divider circuits
that generate the timing 1 KHz. Whenever the 100 Hz lock detector fails to indicate data lock after RF lock has been achieved
for more than 3 seconds, the coarse phase detector and coarse
VCXO are connected into the data loop (Lock/Freeze opens,
Fine/Coarse 2 closes, and Fine/Coarse 1 opens). This allows for
faster slewing of the data loop and data acquisition. After data
lock has been obtained for 32 seconds, F/C 2 opens, F/C 1 closes,
and LiF cioses, reconnecting the fine VXCO and fine phase detector into the data loop. Because the fine VXCO has been removed
from the data loop during acquisition, its drift is very low; the
added error in timing is one millisecond or less, as a result.
When a valid relock occurs, there is immediate synchronization to
satellite time. After the satellite signal has been identified,
multiplexer 2 in FIGURE 3-9 reconnects the correct '0.1' microsecond switch to the select circuit. The select circuit picks
one of the ten outputs from the divide-by-ten circuit to reset
the three dividers shown. This causes a phase shift in the data
loop divide-by-ten circuit, producing the fractional propagation
delay.
3-189
The IRI G-B c ire u its have been moved to the option"board
to maintain the accuracy during reacquisition time.
3-190
A loss-of-lock bit is added to the IRIG-B Time Code.
This bit is located at pr+530 milliseconds. Pr+530 milliseconds
= Control Element 4 (see SECTION VIII, FIGURE 8-1) The loss-oflock indication is a software modification that indicates loss of
carrer lock for more than 150 seconds.
3-191
The program in FIGURE 3-10 provides the user with
propagation delay switch settings and antenna elevation angles
for use with Kinemetr ics/TrueTime Model 468-DC GOES receivers.
The program has been written in BASIC and can be run on a CPM
8032 computer.
NOTE 1:
Enter longitude coordinates in terms of West longitude
in degrees.
NOTE 2:
Preface Southern latitude coordinates with a minus
sign.
A hard copy listing of a more detailed program, comwith operator prompts is available. -contact Kinemetrics/
TrueTime for a copy of this program.
pLe~e
3-43
8 REM PRGM DATE
1/15/83~
L.
ELMORE, G. HARDIN
14 PI=3.141592654000001#
20 R0=140580~:R~M SAT RADIUS
30 R1=21223~REM EARTH RADIUS
40 L1=75.46*PI/180: REM WALLOPS LONG
42 F1=37.85*PI/180
.44 F'R I !···.IT ENTER THE FOL..LO!/J I NG
CUORD I f-..!f.~TE:'.:)
Ii
IN
DEGPEES (:jr.!D
47 PF-t'.INT~PF:INT
!56 PR I NT" USERS UJNG I TUDE "; ~ INPUT L.:~:;: L.:3=:::t... :~:;"*.p I! l BO
11
~~;7 PF-< :r. NT" usEF<'.3 t...nT I TUDE
;
: INPUT
F~:; = F:~;:=::FS*-P r / t :30
!:::iti PF.: I l\rl ~Ph: I r.n·
11
t:-~.e PF\: I NT :::;?.YTELL. :i: TE LONG r TUDE i;; : 1 NPUT L.2: L'.Z::=L2-iw 1/1 c:o
70 PR I NT ii ~3(.~TEL..L.. I TE L.(~T I TUDE 11 ; : INPUT F:2: F2o.::F2·*-P I/ 1. i:30
130 REM CALCULATE WALLOPS>SATELL..ITE
1.40 L..O:::=L:I.
F 0 :::: F. :I.
GOSUB 500:REM RETURN WITH
170 Tl==TO
1 ;'~! 0
160
TO=TIME
190 REM NOW SATELLITE TO SITE
:2 0 0
L. O:::::L :.::;
2 J 0 FO===F:S
250 REM CALCULATE SWITCH SETTING & PRINT
260 T4=100-C310000'-T3-T1)/1000
~;::6~5 T t:~=== l N.T ( T .q.)
'..?68 PF:INT:PRINT
:~269 PF: I NT
27'4 F'Flt·~T'it)~'-IITCH SETTINb '';T4; 'MILLif3EC::OND~:;
2"/~S GOSUB 600
280 PR I t·rr ll ELE\/{\T I UN {i!"o.ff3L..E "; I NT ( ( H·fi· 1 E!O) / p I+" :5) ; ;; DE (_;::;FEE~)!!
285 PRINT:PRINT:PRINT:PRINT
1
:?Bf:- PPINT
'..?-=)6 PF: INT
297 PF< I Ni
::::;oo END
500 REM CALCULATE 1 WAY TRAVEL TIME
510 B=COSCABSCL2-L..O>>*CDS*CDS : F~EM
t:""4
z0
H
~
°'00......
70
I
80
I
l~;
910
I
TIME CODE
l0
10
I
TIME CODE
I I
A
H
I
30
I
MLS SYNC
ADDRESS
~1r--;1-~~=LS~SY~N~C~t--~~~A~D~DR~E~SS:....._~~-~1..._~1f--~~~1L~S~S~YN~C:.__+-~-~_.!..!.::~::..:::..:;:_~~----lf---+-_..:..;=-.::...:...:..;..:_-1--
2:
z
1°
BLOCK START
--
20
1
INTERROGATION{
MESSAGE
FORMAT
TIME CODE
1-4
•Cd
BLOCK START
4
~
0
15
31
15
4
31
4
BITS
~"------·~~~~~-B-IT--S~~--~~~~~
I
I
_1
.....'
C')
BITS
'-..---'
I
>
H
15
/
/
/
1'-1
/
0
/
z
/
/
/
:z
~
en
en
/
/
DATA
RECORD
START
>
~
~
r
1
/
I
/// . . . . . . . . .
0~ f,,...l__ ~
SEC 30 ~
~
0
SffOO
0101
~
l
H
1-4
/
//
~
1
loio' 'ioio'
0101
0101
~
J--',
INDEX (HALF SECONDS)
----
2
3
03 .o
02 . o
1
04.0
I
05.0
I
1010
0101
1010
0101
1010
0101
1010
0101
1010
0101
r--\
4
r--\
5
r---1
6
r--'>r---1
7
8
06.0
I
08.0
I
1010
0101
1010
0101
1240
1248
1240
1248
1200
~
r---1
~
~
J--',
J--',
~
9
10
09.0
I
I
10.0
I
1111
TS
UM
TM
- - - - - - - - - SYNC WORD---------
3:
07.0
I
1248
~
1248
1200
0000
J--',
T----S
r--\~
UH
TH
UD
TIME OF YEAR WORD
TD
HD
SIGN
LUT
1240
ts
CORR _J
~
n
0
0
~
~
0
~
3:
>
H
en
TI ME CODE
FORMAT
8
10.0
11. 0
12.0
I
I
I
1000
1?~8
1240
1248
r--\
~
r---1
~
UD
to
SATELLITE
- - - - LONGIUJDE
HD
TD
20.0
I
21.0
I
l"rj
~
0
:J:
SIGN: "1"
"O"
=
+
13.0
14.0
15 .0
16.0
I
I
I
1111
0000
1248
1248
T----S ~
~
~
1248
hD
SIGN
UD
to
SATELLITE
LATITUDE
IL__
22.0
I
23.0
I
I
1248
1111
0000
1248
1248
1248
~
T----S
J--',
T---S
r--\
hD
SIGN
HµS TµS
SATELLITE
RADIUS
___J L_
24.0
I
25 .0
I
17 .0
18.0
I
19 .0
I
UµS
__J
26.0
I
27.0
I
28.0
I
29.0
I
20.0
I
4-112
State 0 is entered a few seconds after normal RF lock
is attained. The detection of MLS is an almost certain indication that lock to a functioning satellite has been obtained.
There is no return to state 1, so the coarse timebase will not be
used again.
4-113
When interference causes loss of lock during normal
operation, state 3 is entered, freezing the timebase oscillator
at its present frequency (or switching to an external timebase if
one is provided).
State 4 permits re-lock to the data after
protracted loss of data lock has caused the timebase to drift out
of the.acquisition range of the fine data phase detector.
4-114
In state 0 at turn-on, "output time" commences from
zero, indicating elapsed time, but is not displayed on the front
panel. When two successive time frames agree, this time replaces
the elapsed time, the time quality flags are brought low, and the
display comes on.
TURN ON
STATE 0
NO SATELLITE
BOTH OFF
LOSS OF
RF LOCK
SIGNAL
FOR 2 MINUTES
READ TIME
WITHOUT READING
LEGAL SATELLITE
LONGITUDE
READ LEGAL
SATELLITE
LONGITUDE
07X0 OR 13X0
STATE 1
NORMAL OPERATION
LIGHT RESPECTIVE
LED
LOSS OF
RF LOCK
SIGNAL
FOR 2
MINUTES
READ LEGAL
SATELLITE
LONGITUDE
STATE 2
STANDBY SATELLITE
BLINK MOST
LIKELY LED
FIGURE 4-21
SATELLITE LED STATE DIAGRAM
4-25
4-115
If satellite signal is lost, output time continues to
update via the internal (or external) timebase.
Meanwhile, the
clock searches for the satellite signal and re-syncs to it without affecting the output time. This independence is achieved by
not applying the propagation delay correction while in mode 2
unless the switch setting is changed.
Since the timebase oscillator must still gain phaselock with the data, a slow drift of up
to five milliseconds can occur during this time.
4-116
Once data lock is re-established, no further adjustments to the output time will occur until four (4) consecutive
frames agree. At this point, the time quality flags go low and a
time jump of an integral number of milliseconds can occur, to
bring output time in sync with the new frame. Re-sync to the time
frame requires four consistant frames to reduce the probability
of incorrect time during adverse conditions.
4-117
The satellite LEDS are controlled by the received satellite longitude data. A position between 70 and 79 degrees west
will light the east LED, while 130 to 139 degrees west lights the
west LED.
4-118
A blinking LED indicates time lock without a legal
longitude. The most common cause of this condition is reception
of the back-up satellite at 105 degrees west during problems with
one of the ma in satellites. East or west bl inking merely ind icates which sweep the processor is attempting; if the manual
override switch on the analog board is in effect, no significance
attaches to which of the two LEDs is blinking.
4-119
TIMING OUTPUTS
4-120
The timing outputs under software control are:
One Hertz
Slow Code
60 Hertz
IRIG-B
IRIG-H
4-121
One Hertz,the Slow Code, and 60 Hertz are all present
beginning at power on. The IRIG time code outputs start after
NBS time has been acquired. The IRIG-B time code transitions are
within 40 microseconds of the data clock, the other outputs may
lag by up to 300 microseconds. This difference arises from the
fact that the IRIG-B output is pre-computed and output immediately after the data clock interrupt occurs, while the others are
output as they are computed during the interrupt service.
4-122
Operation of the communications options, RS-232C and
IEEE-488 are described separately. The program controlling these
options runs with lowest priority on the 1 KHz interrupt, so
there may be up to 300 microseconds jitter in these outputs.
4-26
SECTION V
MAINTENANCE AND TROUBLESHOOTING
5=1
MAINTENANCE - MODEL 468-DC
5-2
Equipment needed:
1.
RF Sweep Generator ... HP8601A or equivalent
2.
Oscilloscope ......... ! MHz or greater bandwidth
3.
Digital voltmeter .... Greater than 10 Meg. input
impedance
4.
Frequency counter .... Fluke 1900A or equivalent
5.
Spectrum analyzer .... HP 8558B/182T or equivalent
5-3
The Model 468-DC has been designed to provide maintenance free operation. The main instrument contains only seven
adjustments, most of which will never require resetting. They
are:
1.
Third IF trim, a ceramic trimmer capacitor on
Assembly 86-73, C9
2.
Data symmetry, a trimpot on Assembly 86-74, R45
3.
East sweep trim, a trimpot on Assembly 86-74, R38
4.
West sweep trim, a trimpot on Assembly 86-74, R37
5.
10 MHz fine timebase trim, a trimpot on Assembly
86-74, Rl7
6.
1 MHz coarse timebase trim, a tunable coil on
Assembly 86-74, Ll
7.
First L.O. peaking, a tunable coil on Assembly 867 4, Tl
5-4
THIRD I.F. TRIM - ASSEMBLY 86-73
5-5
The sweep generator and the scope are needed for this
adjustment which sets the third intermediate frequency to the
center of the passband of the 4.5 MHz crystal filter Tl, Yl, Y2,
etc.
5-6
Connect the sweeper RF output through a blocking capacitor (0.1 UF) to the antenna input BNC. Set up the scope so the
sweep output gives full scale horizontal deflection connecting
the X axis to the sweep output, and 2V to 5V gives full vertical
deflection. Connect the scope vertical input to TP3 on Assembly
86-74, the Analog Board. Set the sweeper to 4.500 MHz, 10 kHz
sweep width, about 5 sweeps per second sweep rate, and -40 dbm
output level. A faster sweep rate will distort the picture.
5-7
The display should appear as in FIGURE 5-1. The zero
beat must occur in the center of the filter passband. If the
zero beat is outside the -3 db points, C9 on Assembly 86-73 must
be adjusted to bring it back into the center. This adjustment
also affects receiver delay by up to 100 microseconds.
5-1
FIGURE- 5-1
5-8
THIRD LOCAL OSCILLATOR ADJUSTMENT
DATA SYMMETRY ADJUSTMENT - ASSEMBLY 86-74
5-9
To adjust data symmetry, R45, the clock must be locked
to a satellite. Connect the voltmeter to TP3, on Assembly 86-74
(see SECTION VI). A 6 second low pass is helpful for this adjustment. The FIGURE 4-23 shows the low pass filter which can be
used. Adjust R45 (Assembly 86-74) for 0+0.2V.
This adjustment
also affects receiver delay up to 100 microseconds.
TO TP3
,.... ____ 2.2M
_,,VV\J-----11----~~
J
TO VOLTMETER
3. 3µF
-
FIGURE 5-2
5-10
LOW PASS FILTER
EAST SWEEP TRIM - ASSEMBLY 86-74
5-11
Connect the frequency counter to the antenna input BNC
(after removing the sweeper). Ground TP6 on the Analog Board
( As s em b 1 y 8 6 - 7 4) and s e 1 e c t t he Ea s t Sa t e 11 i t e wi th S 2 ( 1 ab e 1 e d
"E"). Adjust R38, the center of the three-in-a-row trimpots, for
a frequency of 18,643,400 +50 Hz. See SECTION VI, Assembly 8674, for parts location of TP6, R38 and S2.
5-2
5-12
WEST SWEEP TRIM - ASSEMBLY 86-74
5-13
Select the west sweep with Sl (labelled "W") and adjust
R37 for a frequency of 18,642,650 ~50 Hz.
5-14
10 MHz FINE TIMEBASE TRIM, ASSEMBLY 86-74.
5-15
Ground TP8, attach the counter to TP12. Adjust Rl7 for
10,000,000 +10 Hz (1 PPM). See SECTION VI, Assembly 86-74, for
parts locat1on.
5-16
1 MHz COARSE TIMEBASE, ASSEMBLY 86-74.
5-17
Ground the coarse oscillator control voltage at TP13.
Connect the counter TPll. Adjust Ll (the shield can nearer the
front of the instrument) for 1.000 MHz ~0.001 MHz.
5-18
FIRST LOCAL OSCILLATOR PEAKING, ASSEMBLY 86-74.
5-19
If a spectrum analyzer covering 18-40 MHz with 50 Ohm
AC coupled input is available, see two sections below.
5-20
Connect the spectrum analyzer to the antenna input BNC
connector. Tune Tl (the can near the back of the instrument) to
minimize 37.3 MHz output while maximizing the 18.64 MHz output.
The 18.64 MHz component will be about +15 dbm, the 37.3 MHz
component about -15 dbm.
5-21
If no analyzer is available, make a dummy load using a
50 Ohm resister in series with a 0.1 micro F capacitor (see
FIGURE 5-4). Connect this load to the antenna input BNC. Look
at TPl with a scope capable of responding to 20 MHz and tune Tl
for maximum output.
REAR PANEL
ANTENNA BNC
0. lµF
TO SCOPE
FIGURE 5-3
50 OHM DUMMY LOAD
5-3
5-22
TROUBLESHOOTING
5-23
No exhaustive troubleshooting tree has been prepared.
It is believed that a more effective approach is to give some
hopefully useful hints to be used in conjunction with the "Theory
of Operation" section.
The circuitry in the instrument. is relatively straightforward.
Interaction with the program may vary
with the options supplied. Therefore, in case of trouble:
5-24
First, make sure that suitable power is supplied to the
instrument (fuse, switch).
5-25
Second, verify that an antenna is connected and that it
has a relatively clear view of a satellite.
(Trees can obstruct
the s i g n a 1 , as wi 11 bu i 1 d in gs) .
A DC v o 1 t meter sh o u 1 d read
approximately +12V at the antenna end of the lead-in coax.
5-26
In some locations, land-mobile service interference on
the west satellite frequency greatly delays time acquisition.
Try the east.
5-27
When the clock is first turned on, the colons should
blink; on one second, off one second, etc.
If they don't, the
program is probably not running. Take the cover off. Check that
all connectors inside are making proper contact. With no antenna, both unlock LED'S on the analog board should be lit.
5-28
At this point, check all ten power supply voltages:
On the digital board ... +5V,-5V, +12V, -12V.
On the analog board
+12V, +8V, two +5V, one -6V.
On the display board
+180V (Red Wire).
5-29
If the processor board is running, as evidenced by
blinking colons, check further in this section, if not, see next
paragraph.
5-30
Check for 1 KHz interrupt at U4 (pin 19) on the processor board. If none present, look for trouble in the timing chain
on the analog board.
5-31
Check that the processor clock at Ul pin 38 is 5.0 MHz
and that Ul pin 37 is 1.24 MHz.
5-32
Check that reset (pin 40) is low for a fraction of a
second at turn-on, then goes cleanly high and stays high.
5-33
ets.
5-4
Remove and re-insert the socketed chips in their sock-
+12V MND
OF R48
SINK OF
Ul
+8V END
OF R4
-6V
Ul~
PIN 11
V1
I
V1
FIGURE 5-4
VOLTAGE TEST POINT LOCATIONS - MODEL 468-DC
5-34
Check for the presence of the 1st local oscillator
sweep voltage on TP6 of the analog board.
This should be a
slowly ramping DC voltage which begins at approximately -3.Sv and
ramps to approximately 4.0v.
The period should be 40 seconds.
5-35
If the program is running, but no time comes on the
display after a few minutes, look at or listen to J2 on the
analog board.
5-36
At turn-on, there should be a few volts of audible
noise present. You can easily see/hear the satellite signal as
the receiver sweeps to it and locks. A marginally weak signal is
hard to discern on the scope but easily audible op the speaker.
A cassette tape of typical signal and interference conditions
(with earphone) is available from the factory for this checkout.
Contact Kinemetrics/TrueTime directly for this tape and earphone
set~
If no signal is present, there is probably a problem in the
antenna. If a strong signal is observed, the antenna is OK and
the problem is probably on the analog board (see paragraph later
in this section).
5-37
If the antenna appears to be malfunctioning, and you
don't want to return it to the factory, it is possible to open
and check it. To open the antenna, cut the silicone rubber seal
around the edge of the plastic bubble, pry off the bubble and
take the flat plate antenna off the metal box, too. You should
be looking at the 86-170 board.
5-38
If the green LED is lit and the red LED is not, the 8670/71 board is probably OK. Also, if no noise was apparent at
the TP3 on the analog board, the problem is likely in the I.F.
amplifier, QB thru Ql2.
5-39
Use of an RF sweeper greatly eases diagnosis and treatment of the I.F. board. Inject 21.4 MHz at the mixer I.F. port
(end of RS nearest the mixer). Locate R56 and ground the end
which is nearest the center of the board. This is the AGC line.
5-40
Set
dbm (3mv).
at about 300
nearest edge
the sweep width to 100 KHz and set the level to -37
You should get a rectangular passband 13 KHz wide
mv p-p when observing the drain of Q9 (end of R49
of board) using a xlO scope probe.
5-41
If that's ok,move the
Here you should get a similiar
amplitude with an input of -47
isn't running, no signal will be
scope probe to the drain of QlO.
passband and about 2 volts p-p
dbm (1 mv).
If the second L.O.
observed here.
5-42
Check the last two 4.5 MHz stages by looking at the
drain of Ql2.
Here you should see about 2 volts p-p with an
input of -97 dbm (3uv).
5-43
Remove the AGC ground. If the AGC and the control gates
of the dual-gate mosfets are operating properly, you should see
about 15 volts p-p of noise at the drain of Ql2.
5-6
5- 44
I f the pr ob 1 em i s in L. 0 .m u 1 t i p 1 i er , r e fer enc e to the
voltage chart, FIGURE 5-5, may prove useful. If proper operation
cannot be obtained by replacing a defective transistor, it is
recommended that the unit be returned to the factory for repair;
since tuning of the UHF circuits is critical and inter-active.
To use FIGURE 5-5. it is necessary to disable ALC on the multiplier chain. Do this by grounding TP2.
Supply Volts
,
i
MEASUREMENT POINT
TP3
TP4
TP5
TP6
Q1
Collector
TPl
FIGURE 5-5
0
£ I_
o.
oq
-TTnn~
=
T - - - - ...
L~V~~
12.0
~
I
,
"l ..l L.-
TiLUUW
VOLTAGE
TOLERANCE
0.5v
0.5v
0.8v
0.8v
7.lv
0.4v
O.lv
O. lv
0.2v
0.2v
0.4v
O. lv
ASSEMBLY 86-71 VOLTAGE CHART
5-45
To continue, you will need the sweeper and spectrum
analyzer.
5-46
Inject 18.64 MHz, sweep width 1 MHz, level 0 dbm into
the multiplier input. Check the input high pass and bandpass
filters by observing the base of Q3. You should see a peaked
response at 18.64 MHz with a bandwidth (-6 db points) of approx.
1 MHz. Next look successively at the emitter current test points
for the multiplier stages.
Adjust each stage for widest peak
of emitter current in the succeeding stage. Then adjust the 447
MHz helical filters for widest leveled response at TP8. Use of a
spectrum analyzer will aid in avoiding the possibility of spurious responses.
5-47
Troubles on the detector board, Assembly 86-73, will
show up as loss of signal going one direction or the other, and
as mistuning of the third L.O., covered under "Maintenance".
5-48
Troubles on the analog board generally are due to opamp outputs being stuck high or low, or analog switches latching
up or leaking excessively. These kinds of problems can often be
isolated by feeling the IC's for hot ones and by looking for
stuck op-amp outputs with inputs inconsistent with the output
state.
Refer also to the "Theory of Operation" section for
description of proper waveforms on the test points.
5-7
5-49
TROUBLESHOOTING THE EXTERNAL OSCILLATOR (OPTION)
5-50
If 0500 won't light when the external oscillator is
connected, look at U7 (pin 9). You should see approximate TTL
levels at half frequency.
If 0500 lights, but the clock doesn't
appear to lock to the external oscillator when the antenna is
pulled, check for drift between the waveforms at U7 (pin 3), 10
KHz, and U7 (pin 8), ext/2. Also check that U3 (pins 5 and 12)
both go high.
5-51
TROUBLESHOOTING THE D.C. SUPPLY (OPTION)
5-52
See SECTION IV, entitled D.C. POWER INPUT (Option).
5-8
SECTION VI
SCHEMATICS AND PARTS LIST
MODEL 468-DC
6-1
6-1
6-2
PARTS LOCATION - ASSEMBLY 86-170
~~=-,;;-;;;II':
,------'
I
I
I
!'Oil' 4•8-l"k'
- - - - - -
,.;.rr:
~
--- - - - - - - - l
~ fillil.llo-F JM"
':;;~-/.':,{:',...."-------------------------------------__,
I~
:::,
'f7o
4.0BAI#•
1~::"
""~
~OK
A'l7
l2k
rJ/1tttr
- -- -:;M
~
INPvr , . . _ ,
+&•
1
I
L., - 3-'
I
I~~~ 1~4-K'tF. 4-1.B·l'K. ""°'~!F
I W~~c'Z,'"J~~~."4
L.0. Li;'.VEL CONTROLTO QS
'>--,__'V'Jl.,.-4- C
f--__JL-----------'
Pit~~ AU F7
~----------------------~
A-----------------------------~
2.1.4 MHz.
TO
f.F. AMP
YI
- - HIGH PASS
&10
18.6 MH•
D
l=ROM RECE1Vi=R
Cl!
FILIER.--1-C/2
-------frl-r~0
--CABl-E
':?,.,,..N
1
~.~,.uN
IS., MHz_
__
BAND PAS.5
Cl4
C.15
f--- B
@'·"·
,link/
C't,.
Ci'"Z
4 17
1.0
4
::
C"5
;.;_,.
tt'O
4C
~4
~~l'et.AV(I
C/7
~z~
C/RCV/F
¥¥7MN£
TO FL4
/.:5.c1.+' !LO
i/70
D
LAST USEDo
~:~
;.;g
P5£
7L4
L::!
~~,5
L'27
M'
Q13
&
·~
....:
IVW#N 2euc-rs i'!'1r is
AT i"'"~~.
INSTil'L~C
s~c1,s14o,
i.11 1.s
~A.PACI' ?'4Nt:6 Jtllf~.(41"S AV ,,D/Clfl,tll"AA'A,PS,
~4~..rT;i#.tV&G """''"1f',& /N ""'1'MS :t.5~~ Y4W.
~Tt..1,71..1(.llfA!E' ""11.lf'~r 611'"
C';tlt:V/T" lt:MR~.
"'*"'.....,.-,,:::i
AlllTE$: ~"ktl'SS P1'Y4;fi11V/SE 6/&tf!r:/,IJT.tl.P
°'
w
I
6-2
SCH1&MATIC
ASSEMBLY 86-170
7'P9
~~
TO CIO
NOT
USE'D>
c.11.,a"z.
El!..3"-"'-',
t.e.,,
TL~
°'
I
~
°'
w
en
ti<
3:
"'
0
l:""I
c
~
en
......
c:i
~
t-1
......
0
!2
~
l'Tj
~
~
!2
C"'l
~
cc
°'....
I
.....i
0
mHIE'IRI~/
Ull!HE'lRI~/
'llUETD£
SYtBX. PART tUEER.
'DUETIME
I
SYtBX. PART tUEER.
PCB
Cl
C2
C3
C4
cs
C6
C7
CB
C9
ClO
Cll
Cl2
Cl3
Cl4
Cl5
Cl6
Cl7
CIB
Cl9
C20
C21
C22
C23
C24
C25
C26
C27
C2B
C29
C30
C31
C32
C33
C34
C35
C36
C37
C3B
C39
C40
C41
C42
C43
C44
C45
C46
C47
C4B
C49
C50
C51
C52
C53
C54
css
C56
C57
C5B
C59
C60
B5-170
36-33
36-50
36-SB
36-16
36-41
36-50
36-5B
36-5B
36-SB
36-39
36-33
36-39
36-50
36-24
36-01
36-24
36-35
36-12
36-SB
36-5B
36-01
36-16
36-37
36-0B
36-33
36-01
36-50
36-10
36-29
36-0B
36-33
36-50
36-01
36-16
36-16
36-41
36-33
36-33
36-41
36-33
36-41
36-33
36-B3
36-16
36-08
36-16
36-SB
36-SB
36-5B
36-08
36-5B
36-B3
36-58
36-SB
36-B3
36-16
36-08
36-16
36-5B
36-83
IEnUPTIClf
468MS
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Ca!J.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
~p.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
MK I I PCB
fot>nolithic
fot>oolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
fot>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
fot>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
fot>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
fot>nolithic
!i::>nol ithic
!i::>nolithic
!i::>nol ithic
!i::>nolithic
!i::>nolithic
!t:>nolithic
!i::>nolithic
!t:>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
!i::>nolithic
lt:>nolithic
!t:>nolithic
!t:>nolithic
!t:>nolithic
!t:>nolithic
lt:>nolithic
lt:>nolithic
lOOpF
470pF
.OOlpF
22pF
220pF
470~>F
.00 uF
.OOluF
.OOluF
180pF
lOOpF
180pF
470pF
47pF
l.OpF
47pF
120pF
12pF
.OOluF
.OOluF
l.OpF
22pF
150pF
8.2pF
lOOpF
1. OpF
470pF
lOpF
6BpF
B.2pF
lOOpF
470pF
1. OpF
22pF
22pF
220pF
lOOpF
lOOpF
220pF
lODpF
220pF
lOOpF
• OluF
22pF
B. 2pF
22pF
.OOluF
.OOluF
.OOluF
8.2pF
• OOluF
.OluF
.OOluF
.OOluF
.OluF
22pF
B.2pF
22pF
.OOluF
.OluF
~PTIClt
C61
C62
C63
C64
C65
C66
C67
C6B
C69
C70
C71
C72
C73
C74
C75
C76
C77
C7B
C79
C80
CBI
CB2
CB3
C84
CBS
36-B3
36-44
36-B3
36-B3
36-B3
36-B3
36-44
36-B3
36-B3
36-B3
36-B3
CRl
CR2
CR3
CR4
CR5
57-50B2-2BOO
NJT USED
35-B
57-50B2-2BOO
57-50B2-2800
Diode, Varicap, 2112
Diode, Sch., H.P. 50B2-2800
Diode, Sch., H.P. 50B2-2BOO
001
002
SB-5
SB-1
I.ED, Red, MV5053
I.ED, Green, MV5253
FLl
FL2
FL3
FLS
342-3
342-3
342-3
342-4
342-4
Filter,
Filter,
Filter,
Filter,
Filter,
Jl
381-lA
Connector, SMA, Flange Mt.
Ll
L2
45-.33
45-.33
45-1.5
45-1. 5
45-.363
45-.363
45-.33
45-.197
45-.197
45-.33
45-.06
45-.06
45-.33
45-.22
Choke, RF, • 33uH, Molded
Choke, RF, .33uH, Molded
Coil, 1. 5uH, Var •
Coil, 1.SuH, Var.
Coil, 363nH, Var., 9-1/2 Turns
Coil, 363nH, Var., 9-1/2 Turns
Choke, RF, . 33uH, Molded
Coil, 197nH, Var., 5-1/2 Turns
Coil, 197nH, Var., 5-1/2 Turns
Choke, RF, .33uH, !t:>lded
Coil, 60nH, Var., 1-1/2 Turns
Coil, 60nH, Var., 1-1/2 Turns
Clioke, RF, . 33uH, Molded
Clioke, • 22uH, RF, !t:>lded
FL4
L3
L4
LS
L6
L7
L8
L9
LIO
Lll
Ll2
L13
Ll4
36-B3
36-41
36-B3
36-B3
36-54
36-B3
36-95
36-95
36-33
36-54
36-33
36-B3
36-B3
Cap., fot>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., tot>nolithic
Cap., tot>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., tot>nolithic
NJT USED
Cap., fot>nolithic
Cap., fot>nolithic
Cap., !i::>nolithic
Cap., !i::>nolithic
Cap., fot>nolithic
Cap., !i::>nolithic
Cap., !i::>nolithic
Cap., !i::>nolithic
Cap., !i::>nolithic
Cap., !i::>nolithic
Cap., fot>nolithic
Cap., fot>nolithic
Cap., !i::>nolithic
.OluF
270pF
.OluF
.OluF
.OluF
.OluF
270pF
.OluF
.OluF
.OluF
.OluF
.OluF
220pF
.OluF
.OluF
6BOpF
.OluF
• luF
. luF
lOOpF
680pF
lOOpF
.OluF
.OluF
Diode, Sch., H.P. 50B2-2800
Hex.
Hex.
Hex.
Hex.
Hex.
468MHz
468MHz
468MHz
447MHz
447MHz
O"\
1CnetE1RICS/
w
en
.-<
:z
=
0
t"""
c
~
tll
to-I
~
~
....
KIIDtE'IRICS/
TRIETIHE
I
~ PART R.1HR
SYfollOl. PART R.IHR
R28
R29
R30
R31
R32
R33
R34
R35
R36
R38
R37
R39
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49
RSO
RSI
R52
R53
Ll5
Ll6
Ll7
Ll8
Ll9
L20
L21
L22
L23
L24
L25
I.26
L27
1.28
L29
L30
45-.047
45-.075
45-1. 5
45-1.
45-1. 5
45-1. 5
45-1.5
45-3.3
45-3.3
45-3.3
45-3.3
41-0
41-0
41-0
Choke, 47nH, RF, Molded
Coil, 75nH, Core Removed
Coil, l.5uH, Var.
Coil, l.5uH, Var.
Coil, 1. 5uH, Var •
Coil, 1. 5uH, Var.
Coil, 1. 5uH, Var.
See "'r' Section
See "'r' Sect ion
Coil, 3.3uH, RF, t-blded
Coil, 3.3uH, RF, Molded
Coil, 3.3uH, RF, t-blded
Coil, 3.3uH, RF, Molded
Ferrite Bead (For Q8)
Ferrite Bead (For Q9)
Ferrite Bead (For Ql2)
Ml
50-1
Mixer, 1-500 MHz, SBL-1
s
to-I
0
2:
~
~
~
~
~
~
00
O"\
I
,.....
....,
0
,.....
°'
Q4
Q5
Q6
Q7
Q8
Q9
QlO
Qll
Ql2
Ql3
ALL
Rl
R2
R3
R4
RS
R6
R7
n
R8
•
......,
Rl3
0
0
rt
I
VI
Ql
Q2
Q3
R9
RlO
Rll
R12
Rl4
RlS
Rl6
Rl7
Rl8
Rl9
R20
R21
R22
R23
R24
R25
R26
R27
'JRIETIHE
JE.CDUPTIClf
175-901
Transistor, H.F., NPN, MRF901
175-309
Transistor, JFET, T0-92,J309
175-5179
Transistor, NPN, T0-7.2, 2N5179
175-5179
Transistor, NPN, T0-72, 2N5179
175-5179
Transistor, NPN, T0-7.2, 2N5179
175-6304
Transistor, High Freq., NPN, 2N6304
175-901
Transistor, H.F., NPN, MRF901
175-211
Transistor, MOSFET, T0-72, 3N211
175-211
Transistor, t-U>FET, T0-72, 3N211
175-211
Transistor, MOSFET, T0-72, 3N211
175-211
Tr ans i stor , t-U>FET, T0-72, 3N211
17S-211
Transistor, MOSFET, ID-72, 3N211
175-2369
Transistor, Sw., NPN,T0-92, MPS2369
RESISTCRS 1/4 WA'IT, +5% CARBON CCMP. UNLESS Ol'HERWISE OOTED.
02-8S
Resistor, 3.3K
02-73
Resistor, lK
02-56
Resistor, 200 otms
02-65
Resistor, 470 ohns
02-73
Resistor, lK
02-73
Resistor, lK
02-8S
Resistor, 3. 3K
02-121
Resistor, lOOK
02-69
Resistor, 680 otms
02-121
Resistor, lOOK
02-99
Resistor, 12K
02-73
Resistor, lK
02-56
Resistor, 200 otms
02-104
Resistor, 20K
02-121
Resistor, lOOK
02-108
Resistor, 30K
02-99
Resistor, 12K
02-118
Resistor, 7SK
02-73
Resistor, lK
02-113
Resistor, 47K
02-97
Resistor, Hl<
02-59
Resistor, 270 otms
02-113
Resistor, 47K
02-97
Resistor, lOK
02-59
Resistor, 270 otms
02-113
Resistor, 47K
02-97
Resistor, lCl<
IF.SaUPTIClf
02-121
02-73
02-121
02-121
02-145
20-7
Resistor, 270 otms
Resistor, 47K
Resistor, lOK
Resistor, 100 ol-ms
Resistor, 200 ohns
OOT USED
NJr USED
Resistor, 100 ol-ms
Resistor, 51 ohns
Resistor, 100 ol-ms
Resistor, l.5K
Resistor, IM
Resistor, l.5K
roT USED
Resistor, lM
Resistor, 100 ohns
Resistor, 270 ohns
Resistor, 2. 7K
Resistor, lM
Resistor, 100 ohns
Resistor, 270 ohns
Resistor, 1. SK
Resistor, 1. SK
Resistor, lOOK
Resistor, IM
Resistor, 100 otms
Resistor, 270 ohns
Resistor, lOOK
Resistor, IM
Resistor, 100 ohns
Resistor, 270 ol-ms
Resistor, lOOK
Resistor, lM
Resistor, lM
Resistor, 270 ol-ms
Resistor, lOOK
Resistor, lOOK
Resistor, lOK
NJr USED
Resistor, lOOK
Resistor, lK
Resistor, lOOK
Resistor, lOOK
Resistor, lM
Potentianeter, lOOK
L22
L23
52-4
52-4
52-4
Tr ans former , 4uH, l1.5 MHz
Transformer, 4uH, l1.5 MHz
Tr ans former , 4uH, L1.5 MHz
Ul
U2
176-324
176-7808
I.C.' Op. hnp. , LM324
I.C.' Reg. , LM7 808
Yl
Y2
Y3
Y4
Y5
S9-21400
59-21400
59-21400
59-21400
59-25900
Crystal,
Crystal,
Crystal,
Crystal,
Crystal,
R54
RS5
RS6
RS7
R58
RS9
R60
R61
R62
R63
R64
R65
R66
R67
R68
R69
R70
R71
R72
Tl
02-59
02-113
02-97
02-49
02-56
02-49
02-42
02-49
02-77
02-145
02-77
02-145
02-49
02-59
02-83
02-145
02-49
02-59
02-77
02-77
02-121
02-145
02-49
02-59
02-121
02-145
02-49
02-S9
02-121
02-145
02-145
02-S9
02-121
02-121
02-97
t-bnol ithic:, Filter,
t-bnol ithic:, Filter,
t-t>nolithic, Filter,
Monolithic:, Filter,
Osc., 2S.9 MHz
21.4
21.4
21.4
21.4
MHz
MHx
MHz
MHz
0\
6-4
PARTS LOCATION - ASSEMBLY 86-173
6-5
SYMBOL DESIGNATION REFERENCE 86-173
I
0\
KINEHETRICS/
TRUE Tl HE
PART NUMBER
DESCRIPTION
Cl
C2
C3
C4
cs
36-33
36-50
36-58
36-33
36-41
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
FLl
FL2
FL3
342-3
342-3
342-3
Filter, Hex. 468 MHz
Filter, Hex. 468 MHz
Filter, Hex. 468 MHz
Jl
J2
381-lA
381-lA
Connector, Receptacle
Connector, Receptacle
PCB
85-170
468 MHz Pre-Amp PCB Fab.
Ql
175-901
Transistor, MRF 901
SYMBOL
" Gl
{•jfti
G~:ir
@l\fil?
0
®
{·)~
f
Monolithic,
Monolithic,
Monolithic,
Monolithic,
Monolithic,
ALL RESISTORS 1/4 WATT, +5% CARBON
COMP. UNLESS OTHERWISE NOTED.
(
Rl
R2
R3
R4
2-85
2-73
2-56
2-65
Res
Res
Res
Res
st or,
star,
star,
star,
3. 3K
lK
200 ohm
470 ohm
lOOpF
470pF
.lOOpF
lOOpF
220pF
L _ _ __
----
-
- - - - - - -
-
-
-
- - - - -
°'
I
-.....J
6-6
SCHEMATIC - ASSEMBLY 86-173
_J
°'
00
6-7
PARTS LOCATION - ASSEMBLY 86-73
6-8
SYMBOL DESIGNATION REFERENCE 86-73
I
SYMBOL
IINEMETRICS/
TltlJETIRE
DESCRIPTION
SYMBOL
PART ROARER
Cl
C2
C3
C4
36-9S
36-9S
33-60
29-30
29-33
Cap., Monolithic .luF
Cap., Dipped Mica 180pF
Cap., Dipped Mica lSOpF
Cap., Dipped Mica 6SOpF
Cap. , Monolithic .luF
SELECT AT TEST
Cap., Monolithic .luF
Cap., Monolithic .luF
Cap. Cer. Var. lS-60bF
Cap., Dipped Mica lS pF
Cap., Dipped Mica lOOpF
JPR
387-12
"Flexstrip" Jumper, 12 Pin
Ll
L2
L3
L4
43-2
43-2
43-3
43-2
Coil
Coil
Coil
Coil
PCB
8S-73
Detector PCB FAB
Ql
Q2
17S-3702
17S-2369
Transistor MPS3702
Transistor MPS2369
cs
C6
C7
cs
C9
ClO
Cll
36-9S
29-39
29-39
29-S4
36-9S
Assembly
Assembly
Assembly
Assembly
(42-40)
(42-40)
(42-38)
(42-3S)
UNEMETRICS/
TIOETtRE
PART RDABER
DESCRIPTION
ALL RESISTORS 1/4 Watt, ,:!:S% CARBON COMP.
UNLESS OTHERWISE NOTED.
Rl
R2
R3
R4
RS
R6
R7
RS
R9
RlO
Rll
Rl2
Rl3
Rl4
RIS
Rl6
Rl7
Rl8
R19
R20
2-33
2-49
2-33
2-73
2-S9
2-S9
2-113
2-113
2-79
2-69
2-69
2-106
2-106
2-S9
2-89
2-106
2-106
2-89
2-89
2-97
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
22 ohm
100 ohm
22 ohm
lK
4.7K
4.7K
47K
47K
1.8K
680 ohm
6SO ohm
24K
24K
4.7K
4.7K
24K
24K
4.7K
4.7K
lOK
~
l:ll81E1lUCS/
IESC2IPTICll
~
PART lUeF.R
2.2K
2.2K
24K
24K
2.2K
2.2K
24K
lOK
24K
R21
R22
R23
R24
R2S
R26
R27
R2S
R29
2-in
2-Sl
2-106
2-106
2-Sl
2-Sl
2-106
2-97
2-106
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
T2
Tl
43-3
43-3
Toroid (42-42)
Toroid (42-43)
Ul
U2
U3
176-74LS74
176-1496
176-496
1.C. 74LS74
J.C. 1496
I.C. 1496
YI
S9-4499A
S9-4499
49-lSOOO
Crystal 4.S002 MHz
Crystal, 4.4996 MHz
Crystal, 18.000 MHz
43-100
Base, Toroid
Y2
Y3
TO .f"FRa1(
A#7z:NNA
G- r
I I
~
-- -1
Tg
1---e--------~
.R2
I
I
I
/OQ/l
1'1------l
I
l----il'
C-1
I
./
+IZ V-·-4.--~.._.
I
251' t'H -9.3-!J
l-i
I
I
I
CZ.
180
/$."4M#z-t-1
Cl
cs
,/
R2S
IZ
I
,/
.--...---.;SY
/4
C3
/BO
2-IK
I
I
I
6
,,,,,
~~~
-~v
I
--7---jl•
I
L. .,_
"''1!;
II
-.12V---
~
I
5
.43-uH
/3TCW
4.5-Z
-----f.5Y
-~v-f-
TP
···~··
*I •
i"SV -T---r-r'SV
I
I
I
II
I
RZI
e.21:::
ce
I
+5V
-73
i
I
I
•'''"'~:~ ·;
.;/,
. '• ···~~*'"'
...,·w~
··~
....·::iir,,v_.,,_,
)l\~t;;:,,
··-~::.~
6-10
6-10
PARTS LOCATION - ASSEMBLY 86-74
""'·I
. ~~,f _.,.~:..-1;5(!_
V.B~PN.E
&'!:.i'l?f?."
IC/:,€-;,,°!,"'-4
:f1~%1:~~..,~
!/ff~~-:~
I~~;: ~?r
j
I
,-
6-11
SCHEMATIC
ASSEMBLY 86-74
Q/{)O
6-12
°'
.......
SYMBOL DESIGNATION REFERENCE 86-74
I
N
ICINEMETRICS/
TRUE TIME
~ PART NUMBER
Cl
C2
C3
C4
cs
C6
C7
CB
C9
ClO
Cll
Cl2
Cl3
Cl4
ClS
Cl6
Cl7
Cl8
Cl9
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C3S
C36
C37
C38
C39
C40
C41-99
ClOO
36-95
36-95
36-32
36-83
36-83
36-83
24-13
29-54
28-43
29-10
36-9S
29-37
29-44
36-9S
36-83
28-43
36-9S
29-22
29-33
36-83
29-33
36-95
32-29
36-95
24-1
24-1
24-1
24-1
36-83
36-83
36-83
36-83
36-83
36-83
36-83
36-83
36-83
36-95
36-9S
DESCRIPTION
Cap., Monolithic .luF
Cap., Monolithic .luF
Cap., Film, .33uF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap.,·Polystyrene .OluF
Cap., Dipped Mica 680pF
NOT USED
Cap., Film 3.3uF
Cap., Dipped Mica lOpF
Cap., Monolithic .luF
Cap., Dipped Mica ISOpF
Cap., Dipped MicB 270pF
Cap., Monolithic .luF
Cap., Monolithic .OluF
Cap., Film 3. 3uF
Cap., Monolithic .luF
Cap., Dipped Mica 39pF
Cap., Dipped Mica lOOpF
Cap., Monolithic .OluF
Cap., Dipped Mica IOOpF
Cap., Monolithic .luF
Cap., Tant O.luF
Cap., Monolithic .luF
Cap., Polystyrene .OOluF
Cap., Polystyrene .OOluF
Cap., Polystyrene .OOluF
Cap., Polystyrene .OOluF
NOT USED
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .OluF
Cap., Monolithic .luF
NOT USED
Cap., Monolithic .luF
UNEMETRICS/
TRUETIHE
SYMBOL PART NUMBER
DESCRIPTION
ClOl
24-1
Cl02
29-20
Cl03-499
csoo
36-95
CSOl
32-29
C502
36-95
C503
36-58
C504
36-95
csos
33-20
Cap., Polystyrene .OOluF
Cap., Dipped Mica 33pF
NOT USED
Cap., Monolithic .luF
Cap., Tant. 0. luF
Cap., Monolithic .luF
Cap., Monolithic .OOluF
Cap., Monolithic . luF
Cap., Cer. Var. 4-20pF
DI
02
03
D4
DS
06
07
08
D9
010
Dll-499
DSOO
35-IS
3S-12
57-4148
S7-4148
57-4148
3S-8
S8-4
S7-4148
S7-4148
S8-4
58-1
Varicap MV2 ll S
Varicap MV2112
Diode 1N4148
Diode IN4148
Diode 1N4148
Varicap MV2108
LED-Red
Diode 1N4148
Diode 1N4148
LED-Red
NOT USED
LED-Green
Jl
J2
JPR-1
JPR-2
JPR-3
318-2S
369-2
387-12
387-12
387-12
Socket, 12 Pin Strip (318-12)
Jack, Earphone
"Flexstrip - 12 Pin
"Flexstrip - 12 Pin
"Flexstrip - 12 Pin
Ll
41-6A
Coil, R.F. 942-44)
PCB
85-74
Analog PCB Fabrication
QI
Q2
Q3
Q4
QS
Q6
Q7
QB-99
QlOO
175-3702
17S-2369
175-3702
175-2369
175-3702
175-2369
175-3702
Trans
Trans
Trans
Trans
Trans
Trans
Trans
not u
Trans
17S-3904
st or
st or
st or
st or
st or
st or
stor
ed
st or
MPS3702
MPS2369
MPS3702
MPS2369
MPS3702
MPS2369
MPS3702
2N3904
ICINEMETRICS/
TRUETIME
SYMBOL PART NUMBER
DESCRIPTION
NOTE: ALL RESISTORS ARE 1/4 WATT,
5% CARBON COMP. UNLESS OTHERWISE NOTED.
Rl
R2
R3
R4
RS
R6
R7
R8
R9
RIO
Rll
Rl2
R13
Rl4
RlS
R16
Rl7
RIB
Rl9
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
R42
R43
2-153
2-153
2-145
2-107
2-123
2-121
2-81
2-81
2-121
2-69
2-138
2-121
2-203
2-186
2-1S7
2-14S
20-7
2-121
2-97
2-121
2-69
2-81
2-121
2-161
2-89
2-177
2-121
2-117
2-14S
2-97
2-169
2-131
2-14S
2-177
2-73
2-97
20-7
20-7
2-121
2-121
2-133
2-121
2-121
Resistor, 2.2M
Resistor, 2.2M
Resistor, 1.0M
Resistor, 27K
Resistor, 120K
Resistor, lOOK
Resistor, 2.2K
Resistor, 2.2K
Resistor, lOOK
Resistor, 680 ohm
Resistor, SIOK
Resistor, lOOK
Resistor, lOOM
Resistor, 47M
Resistor, 3.3M
Resistor, I.OM
lOOK Var. Pot.
Resistor, IOOK
Resistor, l~K
Resistor, lOOK
Resistor, 680 ohm
Resistor, 2.2K
Resistor, IOOK
Resistor, 4.7M
Resistor, 4.7K
Resistor, 22M
Resistor, lOOK
Resistor, 68K
Resistor, I.OM
Resistor, !OK
Resistor, lOM
Resistor, 270K
Resistor, 1.0M
Resistor, 22M
Resistor, lK
Resistor, !OK
Pot., lOOK Var.
lOOK Var.
Pot
'
lOOK
Res stor,
Res stor, lOOK
Res stor, 330K
Res stor, lOOK
Res stor, lOOK
UHEMETRICS/
TRUETIME
SYMBOL PART NUMBER
DESCRIPTION
R44
R4S
R46
R47
R48
R49
RSO
RSl
RS2
RS3
RS4
RSS
RS6
RS7
RS8
RS9
R60
R61
R62
R63
R64
R6S
R66
R67
R68
R69
R70
R71
R72
R73
R74
R7S
R76
R77
R78
R79
R80
R81
R82
R83
R84
R8S
R86
R87
Resistor, 1.0M
lOOK Var.
Pot
'
Res stor,
330K
Res stor, lOOK
Res stor, lOOK
Res stor, 4.7K
Res stor, lOOK
Res stor, 270 ohm
Res stor, SlOK
Res stor, 1.0M
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, 1.0M
Res stor, SlOM
Res stor, 2.2K
Res stor, lOOK
Res stor, 4.7K
Res stor, 2.2K
Res stor, 330K
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, 1.0M
Res stor, lOOK
Res stor, 1.0M
Res stor, 330K
NOT USED
Res stor, lOOK
Res stor, lOOK
Res stor, lOOK
Res stor, 300K
Res stor, lSOK
Res stor, 2.2K
Res stor, lOOK
Res stor, lOOK
Res st or, lOOK
Res stor, SJ.OK
Res stor, 22K
2-14~·
20-7
2-133
2-121
2-121
2-89
2-121
2-S9
2-138
2-14~·
2-121
2-121
2-121
2-14~·
2-13B
2-81
2-121
2-89
2-81
2-133
2-121
2-121
2-121
2-121
2-121
2-121
2-8S
2-121
2-14~·
2-121
2-14~·
2-133
2-121
2-121
2-121
2-132
2-12~·
2-81
2-121
2-121
2-121
2-138
2- lO~i
KI.HEME TRI CS/
1:RUETIHE
SYMBOL PART NUMBER
DESCRIPTION
R88
2-121
R89
2-14S
R90
2-121
R91
2-121
R91
2-121
R92
2-121
R93
2-121
R94
2-121
R9S
2-121
R96-99
RlOO
2-97
RlOl
Rl02
2-81
Rl03
2-141
Rl04
2-12S
RIOS
2-133
Rl06
2-133
Rl07
2-14S
Rl08
2-146
Rl09
2-149
RllO
2-1S6
Rl 11
2-169
Rll2
Rl13
2-169
Rll4
2-1S6
RllS
2-149
Rll6
2-146
Rll7-119
R120
2-47
Rl21
2-49
R122-499
RSOO
2-12S
RSOl
2-8S
RS02
2-12S
RS03
2-Eil
RS04
2-121
RSOS
2-121
RS06
2-138
RS07
2-138
R508
2-89
RS09
2-69
RSlO
2-97
RSll
2-121
RS12
2-121
RS13
2-73
Resistor, lOOK
Resistor, I.OM
Resistor, lOOK
Resistor, lOOK
Resistor, lOOK
Resistor, lOOK
Resistor, lOOK
Resistor, lOOK
Resistor, lOOK
NOT USED
Resistor, lOK
NOT USED
Resistor, 2.2K
Resistor, 680K
Resistor, lSOK
Resistor, 330K
Resistor, 330K
Resistor, l.OM
Resistor, 1. lM
Resistor, 1. SM
Resistor, 3.0M
Resistor, lOM
Selected in test
Resistor, lOM
Resistor, 3.0M
Resistor, 1. SM
Resistor, 1. lM
NOT USED
Resistor, 82 ohm
Resistor, 100 ohm
NOT USED
Res stor, lSOK
Res stor, 3.3K
Res st or, lSOK
Res stor, 2.2K
Res stor, lOOK
Res stor, lOOK
Res stor, SIOK
Res stor, 510K
Res stor, 4. 71<
Res stor, 680 ohm
Res stor, lOK
Res stor, lOOK
Res stor, lOOK
Res stor, lK
NOTE:
KIHEMEirRICS/
TRUE1rIME
SYMBOL PART NUMBER
DESCR!f!!.Q!
Sl
S2
6S-l
6S-l
Switch, SPST, DIP
Switch, SPST, DIP
Tl
41-6A
Transformer (42-4S)
Ul
U2
U3
U4
176-7808
l 76-08L1
176-4016
l 76-08L1
176-4011
176-4016
176- 74LS74
176-74LS90
176-40lll
l 76-08L1
176-Q8l1
176-40l6
176-780S
176-7906
l 76-08L1
l 76-40ll6
I.C. 7808
I.C. TL084
I.C. 4016
I.C. TL084
I.C. 4011
I.C. 4016
I.C. 74LS74
I.C. 74LS90
I.C. 4011
I.C. TL084
I.C. TL084
I.C. 4016
I.C. 780S
I.C. 7906
I.C. TL084
NOT USED
NOT USED
I.C. 4Sl8
I.C. 4017
I.C. 4049
I.C. 4011
I.C. 4017
I.C. 40SO
I.C. 4011
I.C. 4081
I.C. 4016
I.C. TL084
I.C. TL084
1.C. 4016
I.C. TL084
I.C. 4016
I.C. TL084
I. c. 4016
NOT USED
I.C. TL084
NOT USED
I.C. 4016
S9-10000
S9-186l+32
Crystal 10.000 MHz
Crystal 18.6432 MHz
us
U6
U7
U8
U9
UlO
Ull
Ul2
Ul3
Ul4
UlS
Ul6
Ul7
Ul8
Ul9
U20
U21
U22
U23
U24
U2S
U26
U27
U28
U29
U30
U31
U32
U33
U34-99
UlOO
UlOl
Ul02
Yl
Y2
176-40~)0
176-4011
176-4081
l 76-40Jl6
l 76-08ll
l 76-08l1
176-4016
176-08l1
176-4016
17 6-08ll
176-4016
176-0811
The following i terns are installed when the Advanced
Performance Option (APO) is specified.
C30
R76
JPR4
6-12
176-4Sll8
l 76-40Jl7
l 76-40L19
176-40lll
176-401.7
SYMBOL DE:SIGNATION REFERENCE 86-74
36-S8
2-121
31S-26-2
(cont.)
Cap., .001 uf, Mono
Res is.tor, 100 K
Jumpe~r, 26 AWG, Red, 2" Lg.
(Remove: R69)
°'
6-13
PARTS LOCATION - ASSEMBLY 86-42
6-14
SYMBOL DESIGNATION REFERENCE 86-42
I
SYMBOL
Kmm~~CS/
DESCRIPTION
P1JrT'"""RtJRlrER
Cl
C2
C3
C4
cs
C6
C7
cs
C9
ClO
Cll
Cl2
Cl3
32-29
36-95
36-9S
36-95
36-9S
36-9S
36-9 S
23-10-2S
36-95
23-10-25
36-9S
36-9S
36-9S
*
*
* 32-4 s
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Tant. !.OuF
Monolithic .luF
Monolithic .!uF
Monolithic . luF
Monolithic .luF
Monolithic .luF
Monolithic .luF
Electro 1 OuF 2 5V
Monolithic .luF
Electro !OuF 25V
Mono! ithic .luF
Mono! ithic . luF
Mono! ithic . luF
Cap., Tant 22uF l 5V
(May be used
CRl
CR2
CR3
57-414S
57-414S
57-414S
Diode, 1N414B
Diode, 1N414B
Diode, 1N414B
Jl
J2
J3
J4
JS
J6, 7
JS
J9
379-16
379-16
379-40
379-24
379-2S-l
31B-25
31S-25
Socket, 16
Socket, 16
Socket, 40
Socket, 24
Socket, 2S
NOT USED
Socket, 12
Socket, 12
JPR
3S7 -14
Jumper (3B7 - 7)
PCB
B5-42
Digital PCB FAB.
Ql
175-3 702
175-3904
175-3904
175-3904
175-3904
Transistor,
Transistor,
Transistor,
Transistor,
Transistor,
Q2
Q3
Q4
QS
Pin
Pin
Pin
Pin
Pin
Dip
Dip
Dip
Dip
Dip
Pin (31S-l 2)
Pin (31B-12)
MPS3702
2N3904
2N3904
2N3904
2N3904
NOTE: All Resistors are 1/4 Watt, 5% ca·rbon
Comp. unless otherwise noted.
2-121
Resistor ,
Resistor,
Resistor,
Resistor,
Resistor,
Resist or ,
Resist or,
Resistor,
Resistor,
Resistor,
NOT USED
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
NOT USED
Resistor,
51
52
53
65-1
63-2
63-2
Switch, SPST, DIP
Switch, 10 Pas. Rotary
Switch, 10 Pas. Rotary
UI
U2
U3
U4
U5-9
176-6802
176-6821
l 76-6B21
I 76-6B21
! .C. MC6B21
UlO
176-74LS13B
176- 74HCOO
176-2114
176-2114
176-4011
176-74LS13S
Rl
R2
R3
R4
RS
R6
R7
RB
R9
RlO
Rll
Rl2
Rl3
Rl4
Rl5
Rl6
Rl7
RIB
Ull
Ul2
Ul3
Ul4
UlS
2-153
2-138
2-177
2-B5
2-8S
2-8S
2-73
2-S5
11-121-10
11-121-10
2-SS
2-85
2-8S
2-8S
2-85
2. 2M
SIOK
22M
3.3K
3.3K
3. 3K
lK
3.3K
lOOK SIP
lOOK SIP
3.3K
3.3K
3.3K
3.3K
3.3K
IOOK
I. C. MC6802
I.C. MC6B21
I .C. MC6B21
NOT USED
I .C. 74LS13B
t.C. 74HCOO
I.C. 2114
I.C. 2114
I.C. 4011
t.C. 74LS13B
~I-9
~~~~ ~
t~ ~-~~ !~
~\: :~;zs ~
5\ :-IJ' :- s
·1 ..
r~>
~' :~; ~};~~
1
.-"\
~('
>c....t
l'ill70
\l~·
~
~
~
'"rrtf t
i
-t'ZV
l-'C~-,~-5'V ~e-'?V
t..:
1.THHU
1
~ :
It~.,,~~:~~~· ·~;zE'~.~:..,,~4i~~·~
~
~
1
I
r\
~ ~~ ~ ~ ~
~~~-IJ.
~
}0,_~,.
~ ~t ~
'"'
+<;v
-~'J ~~\] ~
(-,~v~
.,.. TC..A,1'J"-UX.
I')
llr\ ·I
-L~ iiil'l~ I~
J ~ - "~· i'Z:
~~
!t
~
i~
+7 '
l'l
~
~~u i
~
Qffl--i
1
0
I
~ ~· ~
r ~~~
~~ \)
m0 111
~~ ~
r~
D
r
4
!II
~·
~ -:'
"~
MoPe-1..
lOO !:'4.'V
OA"f'
r
D•C.•~ ....,._ECT l"C>J~
~Jli~:7
~~~:~ JI,~ ~
'-''
~
-
'i
--i
''
1.i:=-cx.h•.Ao'6._ 4'.B·OC.I V.ODEL
LOC.< IP!..1.A~
t(,:O L.OC.i<:
I
0
Pi.JA-"!iol!!! l...D<..l{'lrcol.4z
l 1 "~~..;;1.~ .. ~
·>'-"---+-~"---~
0
~
i
°'.......
I
VI
C.'l
n
Ea
3:
>
~
.....
n
>
en
en
~
3:
o:i
t""4
~!"~
~
00
°'J:tI
J6-1'
tf~~!ED
N
J.,L
0
~,_.,.~--~---·-·=------~---~-·~-g---"_,...I
~~~~
.JPf )> l> (
iii .. :;;
.;j 0 ~
=
0
z:
,,0
t
0
~
~
l>
J)
>
'O
)>
~
J> '\J J> "1
> ';;:) ]) 0
'1'16"".JL'3l~J:>.~ua-N
0
-
-!:!
ti
El~
6-16
PARTS LOCATION - ASSEMBLY 86-43
6-17
SYMBOL DESIGNATION REFERENCE 86-43
KINEMETRICS/
TRUETIME
SYMBOL PART NUMBER
KINEMETRICS/
TRUETIME
PART
NUMBER
~
DESCRIPTION
Monolithic
Monolithic
Monolithic
Monolithic
Monol it hie
Monolithic
Monolithic
Monolithic
Monolithic
Monolithic
Monolithic
.OOluF
.OOluF
.OOluF
.OOluF
O. luF
O.luF
O.luF
O.luF
O. luF
O. luF
O.luF
C9
ClO
Cll
36-58
36-58
36-S8
36-58
36-9S
36-9S
36-95
36-9S
36-9S
36-9S
36-9S
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
CRl
S5-S386
Diode, Zener 1NS386
Dl
D2
D2
D3
D4
05
D6
07
08
58-4
58-4
S8-4
58-4
58-4
S8-4
58-4
58-1
S8-l
LED,
LED,
LED,
LED,
LED,
LED,
LED,
LED,
LED,
PCB
85-43
Display PCB. Fab.
Ql
Q2
Q3
Q4
17S-MPSA43*
176-4889
17S-MPSA43*
17S-4889
Trans
Trans
Trans
Trans
Cl
C2
C3
C4
cs
C6
C7
CB
Red
Red
Red
Red
Red
Red
Red
Green
Green
st or
stor
st or
stor
MPSA43
2N4889
MPSA43
2N4889
QS
Q6
Q7
QB
Q9
QlO
Qll
Ql2
Ql3
Ql4
QlS
NOTE:
Rl
R2
R3
R4
RS
R6
R7
R8
R9
RIO
Rll
Rl2
Rl3
Rl4
Rl5
175-MPSA43*
175-4889
17S-MPSA438
17S-4889
17S-MPSA43*
17S-4889
17S-3904
17S-3904
17S-3904
175-3904
175-3904
DESCRIPTION
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
MPSA43
2N4889
MPSA43
2N4889
MPSA43
2N4889
2N3904
2N3904
2N3904
2N3904
2N3904
ALL RESISTORS 1/4 WATT, S% CARBON
COMP. UNLESS OTHERWISE NOTED.
2-81
2-117
2-lOS
2-136
2-93
2-117
2-106
2-136
2-93
2-117
2-105
2-136
2-93
2-117
2-106
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
Res
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
stor,
2.2K
68K
22K
430K
6.8K
68K
22K
430K
6.8K
68K
22K
430K
6.8K
68K
22K
l:INEMETRICS/
TRUE TIME
SYMBOL PART NUMBER
DESCRIPTION
Rl6
Rl7
Rl8
Rl9
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
2-136
2-93
2-117
2-IOS
2-136
2-93
2-81
2-81
2-14S
2-145
2-145
2-145
2-109
2-109
2-109
2-109
2-53
2-63
2-S3
2-109
2-63
2-63
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Ul
U2
U3
U4
176-8880
176-8880
176-4042
189-1
189-1
189-1
189-2
I. C. 8880
I.C. 8880
I.C 4042
Dig t Display
Dig t Display
Dig t Display
Dig t Display
us
U6
U7
430K
6.8K
68K
22K
430K
6.8K
2. 2K
2.2K
lM
lM
IM
lM
33K
33K
33K
33K
150 ohm
390 ohm
150 ohm
33K
390 ohm
390 ohm
20
20
20
30
Pin
Pin
Pin
Pin
(2 Dig t)
(2 Dig t)
(2 Dig t)
(3 Dig t)
6-18
SCHEMATIC - ASSEMBLY 86-43
"'
6-19
'X>
PARTS LOCATION
ASSEMBLY 86-44
'-
,~:
6-20
SYMBOL DESIGNATION REFERENCE 86-44
ltUB£TRICS/
'ltUETD£
SYND. ~
,\ii
C9
ClO
Cll
el2
Cl3
Cl4
C15
C16
C17
C18
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Cap.,
Jl
J2
372-1505
379-16
Connector SO Pin D Ft. Ang.
ocket, 16 pin DIP
JPRl
JPR2
JPR3
2-0
2-0
2-0
Jnol ithic .OOluF
M:>nolithic .OOluF
!t>nolithic .OOluF
M:>nolithic .OOluF
M:>nol ithic .OOluF
M:>nolithic .OOluF
M:>nol ithic .OOluF
M:>nolithic .OOluF
Dipped Mica lOOpF
M:>nolithic O.luF
M:>nolithic O. luF
M:>nolithic O. luF
M:>nolithic O. luF
M:>nolithic O. luF
M:>nolithic O. luF
M:>nolithic 470pF
M:>oolithic O. luF
M:>nolithic O.luF
36-58
36-SS
36-58
36-SS
36-58
36-SS
36-58
36-58
29-33
36-95
36-9S
36-95
36-95
36-95
36-95
36-50
36-95
36-95
Cl
e2
C3
C4
•
IESCRIPTI<»I
U9
UlO
Ull
Ul2
Ul3
Ul4
UlS
Ul6
Ul7
Ul8
Ul9
U20
U21
U22
U23
U24
U25
U26
U27
U28
U29
U30
U31
178-7411:244
178-741£244
178-7411:244
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4042
176-4013
176-4049
176-4001
176-4-42
176-4-42
176-4-42
176-40162
176-40162
176-40162
178-741£244
178-7411:244
178-7411:244
178-7 411:244
I .C., 7411:244
I.C., 7411:244
1.e., 7411:244
I.e. 4042
I.C. 4042
I.C. 4042
I.e. 4042
I.e. 4042
l.C. 4042
l.C. 4042
I.C. 4042
l.C. 4042
l.C. 4042
I.C. 4042
I.C. 4042
I.C. 4042
I.C. 4042
I.C. 4042
I.C. 4013
I.C. 4049
I.C. 4001
I.e. 4042
I.C. 4042
I .C. 4042
I .C. 40162
I.C. 40162
I.C. 40162
l.C., 7411:244
I.C., 7411:244
I.C., 7411:244
I .C., 740C244
~O PIN
IOC>SOAYS
[
I
1
~
--11 ·---
:f],jlRllOI>
l
-
I
I
.,
11.
DAYS
~
IO'!>HOURS
'Z~
JI
""t>"' C.ON.....eC.TOR
HOURS
~
10'.SMINS
~
IO'S SEC~
MINS
~
SECONDS
~
~
37--,
j
~
I
l'e"T"~~'l.44
I
I
IRIG&-.-r--
JJJ:1T•1
11'1 THIW " " • 1001( ~"
ll':llnlol\llrt(o•~.,I(~
ftF. p!i"!>IC........JP!H.
L.A."!>"!' IJ(,50: ~~·~if:~!>,
IJOT~t:>:
--------4-~..--~
-tJfliD-1
...---------------r~5-J
--------1f-$1-s
,
3
I
.,;:-
r - - - - -J
50----__J
i""'It
~~
6-21
SGHEMATIC
ASSEMBLY 86-44
e!'>--
lr"I
°'
N
6-22
PARTS LOCATION - ASSEMBLY 86-46
6-23
SYMBOL DESIGNATION REFERENCE 86-46
I
0
UNEMETRICS/
TRUE TIME
PART NUMBER
DESCRIPTIOB
C9
36-9S
36-9S
36-9S
36-9S
36-SO
36-SO
NOT USED
NOT USED
NOT USED
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
JI
372-125P
SYMBOL
Cl
C2
C3
C4
cs
C6
C7
CB
.luF
.luF
.luF
.luF
470pF
470pF
Conn., 25 Pin, Male 'D',
Rt. Angle
NOT USED
Conn., 40 Pin, Female
NOT USED
NOT USED
CONN., 40 Pin, Male
J2
J3
J4
JS
J6
401-1-2-20
JPR-1
387-12
JPR-2
JPR-3
2-0
2-0
"Flexstrip" Jumper 6 Cond.
(387-6)
Jumper
Jumper
PCB
85-46
PCB, RS232 Output
NOTE:
All resistors are 1/4 Watt, S% Carbon
Comp. unless otherwise noted.
Rl
R2•Rl3
Rl4
RlS
Rl6
Rl 7
Rl8
Rl9
R20
R21
R22
R23
2-169
11-121
11-121
11-121
11-121
11-121
11-121
11-121
Resistor,
NOT USED
Resistor,
NOT USED
NOT USED
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
SI
S2
65-8
65-8
Switch, 8 Pos. SPST DIP
Switch, 8 Pos. SPST DIP
Ul
U2
U3
U4
176-6850
176-81LS96
176- 74LS 138
176-1488
176-1489
176-14411
I. c. 68SO
I. C. 81LS96
I. C. 74LS138
us
U6
U7
UB
Yl
404-1-2-20
2-121
10 M
lOOK
S.I.P.
S.I.P.
S. I. P.
S. I .P.
S.I.P.
S. I .P.
S. I. P.
lOOK
IOOK
lOOK
lOOK
lOOK
lOOK
lOOK
I.C. 1488
I.C. 1489
I.C. 14411
177-2716
NOT USED
I .C. 2716
S9-1843
Crystal, 1.8432 MHz
I>
fl
~
19
~
~
)..
lJ
~
~
R
..,
ft)
Z7
~J()
7
GDY
'A
(K)J'I
"
~7
1'1
"'
I
N
......
6-24
SCHEMATIC - ASSEMBLY 86-46
O"I
6-25
I
N
N
PARTS LOCATION - ASSEMBLY 86-47
6-26
SYMBOL DESIGNATION REFERENCE 86-47
SYMBOL
•
---
KINEHETRICS/
TRUETIHE
PART NUMBER
DESCRIPTION
Cl
C2
C3
C4
36-9S
36-9S
36-95
36-95
36-9S
C9
36-9S
36-95
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
Cap., Monolithic
NOT USED
NOT USED
Cap., Monolithic
Cap., Monolithic
Dl
55-5231
Diode 1NS231
Jl
J2
J3
J4
JS
J6
3B4-24
404-1-2-20
401-1-2-20
Header, 24 Pin, Male
NOT USED
Conn., 40 Pin, Female
NOT USED
NOT USED
Conn., 40 Pin, Male
JPR-1
JPR-2
2-0
3 B7-l 2
Jumper
Jumper
PCB
BS-47
IEEE-4B8 Time Output PCB Fab.
Ql
175-3904
Transistor, 2N3904
NOTE:
All resistors are 1/4 Watt, 5%
Carbon"Comp. unless otherwise noted.
Rl
R2
R3
R4
RS
R6
R7
R9
RIO
Rll
Rl2
11-89
ll-B9
ll-B9
11-89
11-89
11-89
11-89
2-89
2-105
2-B9
2-lOS
2-B9
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Sl
6S-8
Switch, B Pos., SPST, DIP
Ul
U2
U3
U4
176-3448
176-3448
176-3448
176-344B
176-74LS04
176-68488
J.C. 3448
I.C. 3448
I .C. 344B
J.C. 3448
I .C. 74LS04
I .C. 68488
NOT USED
I.C. 74LS138
J.C. 6821
cs
C6
C7
CB
·:* -::/ii
'fl
c
#J
Ji.
°if!
•;i!c.
RB
u~
U6
U7
UB
U9
176-74LS13B
176-6B21
.luF
.luF
.luF
.luF
.luF
.luF
.luF
1/2
S.I.P.,
S.I.P.,
S.I.P.,
S.I.P.,
S.I.P.,
S.I.P.,
S.I.P.,
4.7K
22K
4. 7K
22K
4.7K
4.7K
4.7K
4.7K
4.7K'""
4.7K
4.7K
4.7K
A!J-..-----+"c...+---------~~~llll
Mt- ...,11~--..../),--'-I
/B
An ...~.__""""P:::;....r....-...1
ora~ __JJ·-------+-""'"'1.J~_
__,,......, >........--+-1-'-t-------__.°"'-li
OA""IQV }4 ,
'Jt-...,,.,..,...__________~'-'-1 CAZ.
-'iii!//
~2K
_JJ___
-~---+------~
~f/S- l,~'-----+-~fi-+--+---r-t>-.-+-+--1F-t---------=:L-t,1"77
a'""7 _
lJ
-+--"'5'-1---1--r-1
fsY
·' r
&$
""""::~~~~-=-._--::t-_,~=~~~~:-------=::=i ~:i/TQ ~nil ~
A7N-_!L·---------+--"IJ:;..1....."""";
__
+--J.~. L-11·
P~Y----!-4-!-------+~~.~1 r----......,.....,
... I1.tl II•
19
NC
>-.--+--+---+'-'°'----------=1
Al .PAC ___lU _ _ _ _-4--~-----.--1.
I
,.__J.~L-1 .
5
NR,&"~-__J_zj_ _ _ _ _-+~--1------.--1
~1---1!!. L..1 •. 'I-JV
~I- 126'1 h·
"
.Piie
11,VRP
NC 7 /JCO'
M::
/U(}
11
.NC ' /ZCO
M:' I/ /!'~ ~
~8488
&1
.If
:'\!
+SY
2e
"7/~#1
3
~It I/CO ~
87
...______.1...., ;opo ~
_ _____,;;;15'<110?0
M:: IS 1190 f(;,
g~
39
AZ
(J'\
I
N
w
6-27
SCHEMATIC - ASSEMBLY 86-47
°'
6-28
PARTS LOCATION - ASSEMBLY 86-52
6-29
SYMBOL DESIGNATION REFERENCE 86-52
I
N
ll1E£1RICS/
~
1RIETIME
sn&:I. PART lUl5F.R
~PTiaf
23-20-200
23-4700-2S
23-10-25
23-10-2S
23-400-SO
23-400-SO
23-10-2S
23-10-2S
36-9S
36-9S
36-9S
Cap., Electro 20uF 200V
Cap., Electro 4700 uF 25V
Cap., Electro lOuF 25V
Cap., Electro lOuF 25V
Cap., Electro 400uF SOV
Cap., Electro 400uF 50V
Cap., Electro lOuF 25V
Cap., Electro lOuF 2SV
Cap., 1'boolithic .luF
Cap., 1'bnolithic .luF
Cap., Monolithic .luF
DS
06
D7
08
09
DlO
Dll
012
Dl3
S7-400S
57-4005
57-400S
S7-4005
S5-S386
S7-400S
57-400S
S7-400S
57-4005
S7-400S
S7-400S
57-400S
S7-400S
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Jl
J2
318-2S
318-25
Socket, 7 Pin Strip (318-7)
Socket, 6 Pin Strip (318-6)
JPR-1
2-0
JlUlper
Cl
C2
C3
C4
cs
*
*
C6
C7 *
C8 *
C9
ClO
cu
01
D2
D3
04
1N400S
1N400S
1N400S
1N400S
1NS386
1N400S
1N400S
1N400S
1N400S
1N400S
1N400S
1N400S
1N400S
PCB
8S-S2
PCB, Power Supply
Ql
Q2
175-3904
17S-MPSA43
Transistor, 2N3904
Transistor, MPSA43
OOTE:
All resistors are 1/4 Watt, S'%.
Carbon Canp. unless otherwise noted.
Rl
R2
R3
R4
RS
R6
R7
R8
R9
2-133
2-81
2-169
2-121
2-121
2-89
2-89
2-97
2-104
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Resistor,
Tl
54-2
Tr ans former
Ul
U2
U3
176-7805
176-780S
176-78Ml2
176-7912
176-791.05
176-3130
I. C. +SV Reg. , l.M780S
U4
us
U6
*
l.C.
l.C.
I .C.
I.e.
l.C.
330K
2. 2K
HMEG
lOOK
lOOK
4. 7K
4.7K
10
20K
+5V Reg., U1780S
+12V Reg., l.M78Ml2
-12V Reg., U179Ml2
3 Pin Case
8 Pin Metal Can
Cap. Tant. 22UF lSV Part # 32-4S may be used.
~..!"7'"
Pl~~
,.f "/
t: /CJ•
t(2
~
Tl
vAf-2
i1e.
~M.f-
50V
llJ
U4
7912.
011
us
R~
R.4
\OM
IOOK
79L05
.+-SV
--t-JC.
RS
..__.......,...1--+-I + ia"
IOK.
HOTE: OIOOES DI THRU 04
..
0\
I
N
V1
tJOIEc:=..>'.
&
U~L..e.~~
C1THG•
RI
R2
R3
R4
R5
R6
R7
RB
R9
RlO
Rll
Rl2
Rl3
R14
Rl5
Rl6
Rl7
RIB,
Rl9
R20
R21
R22
R23
R24
R25
R26
Sl
S2
S3
S4
SS
S6
57
sa
S9
SlO
SlJ
Ul
U2
U3
U4
us
U6
U7
UB
U9
u10
Ul]
u12
Ul3
32-29
32-29
36-95
29-20
36-95
36-SB
29-31
36-95
36-95
36-95
36-95
387-12
Jl
J2
,IfZ;;;!;f.;ItJ1:
318-12
401-2-1-15
11-121
ll-121
11-121
11-121
ll-121
11-121
11-121
2-143
2-133
2-47
2-49
2-143
2-133
2-125
2-141
2-97
2-146
2-145
2-149
2-169
2-156
2-156
2-146
2-169
2-149
63-2
63-2
63-2
63-2
63-2
63-2
63-2
63-2
63-2
6S-1
65-1
~PI'M!
85-147
flt: l. 5 Option PCB Fab.
Cap., 1.0 uf, 35V, Tant.
Cap., 1.0 uf, 35V, Tant.
Cap., 0.1 uf, lt:>no,
Cap. , 33 pf, Di ppej Mica
Cap., O.J uf, lt:>oo.
Cap., .001 uf, 1'bno.
Cap,, 82 pf, Dipped Mica
Cap., O.J uf, lt:>no.
Cap., 0.1 uf, lt:>no.
Cap., 0.1 uf, lt:>no.
Cap., 0.1 uf, lt:>no.
"Flexstrip" Junper,
22 0>00.
Socket, 12 Pin Strip
Header, lS Pin Strip Rt. ~.
Resistor, lOOK SIP
Resistor, l()Gf( SIP
Resistor, lOOK SIP
Resistor, l()Gf( SIP
Resistor, lOOK SIP
Resistor, l()(l( SIP
Resistor, lOOK SIP
Resistor, 82()(
Resistor, 33(l(
Resistor r 82 ohn
Resistor, 100 Ohii
Resistor, 82()(
Resistor, 33()(
Resistor, lSOK
Resistor, 68()(
Resistor, 1()(
NJr USED
Resistor, 1.lH
Resistor, l. {if
Resistor, l.SM
Resistor, 10. {if
Resistor, 3. {if
Resistor, 3. {if
Resistor, I.IM
Resistor, 10. {if
Resistor, l. 5M
Switch, l 0 fus. Rotary
Switch, 10 Pos. Rotary
Switch, 10 Pos. Rotary
Switch, 10 Pos. Rotary
Switch, 10 fus. Rotary
Switch, 10 fus. Rotary
Switch, 10 Pos. Rotary
Switch, 10 Pos. Rotary
Switch, 10 Pos. Rotary
Switch sPsr
Switch sPsr
17B-74Ft::25J
I.e. 74Ft::253
l 78-74H::253
I.e. 74Ft::253
l 7B-74H::253
I.e. 74Ft::253
178-74ft::25J
I.e. 74H::253
178-74H::253
I.e. 74H::253
17B-74H::253
I.e.
176--084
74li'.:253
I.e. 7L084
176-4049
I.e. 4049
176-4016
I.e. 4016
l 78-74H::2s1
176-4518
I.e. 74H::25l
I.e. 4518
178-741£251
176-4017
I. C. 74fC251
i.e. 4017
rt-r_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-:_-_---r·--+T_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-:_-_-_-_-_-_-_-_---~-_-_-:__-:__-:__-:-.:..-:__-:_-:__-:_-:__-:__-:_-:__-:__-:__-:__-:__-:: _____H__--..;>-;-AL j'.f:~
,-----------r-+----------------------------------~------~J1-c
,..-----------!---1----------------·--------------------------~J1-4
,----------r-+--------------------------~----------------"-'-.DL
J1-0
,----------1---1-----------------~-~-----------~·-------------~D~i
J1·1
~-------___JL._l__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _·~-------------_____li_.J1-z
'•'11';'
$$~
·~~!<';-'
jq\Vl"f
d ~ .0
~$~
<'11',J'
le)l<(}tc:l
i .l~
ll''r.t..l.L
CZE.F
t;>E'S1C........_"fo'2~·
LA.~.....
u~e:;o.
Cll,ISl,.J'Z.
'1:'2.~.Ut!>
IJOI u"'!le.1;.
lil•1
0\
I
N
-....J
6-33
SCHEMATIC
ASSEMBLY 86-147
;)
"'
6-34
PARTS LOCATION - ASSEMBLY 86-53
6-35
SYMBOL DESIGNATION REFERENCE 86-53
I
N
00
SYMBOL
KINEHETRICS/
TRUETIME
DESCRIPTION
32-29
32-29
32-29
32-45
23-400-50
23-400-50
23-4700-25
23-20-200
36-95
24-13
32-45
36-50
36-50
36-83
36-83A
36-83A
Cap., l.OuF Tant.
Cap., 1. OuF Tant.
Cap., l.OuF Tant.
Cap., 22uF Tant.
Cap., 400uF SOV Alum. Electro
Cap., 400uF 50V Alum. Electro
Cap., 4700uF 25V Alum. Electro
Cap., 20uF 200V Alum. Electro
Cap., O.luF Monolithic
Cap., .OluF Polystyrene
Cap., 22uF Tant.
Cap., 470pF Monolithic
Cap., 470pF Monolithic
Cap., • OluF Monolithic
Cap., .02uF, lOOOV Ceramic
Cap., .02uF, lOOOV Ceramic
NOT USED
Cap., .OluF Monolithic
Cap., .OOluF Monolithic
Cap., .OOluF Monolithic
Cap., .047uF Monolithic
Cap., .0056uF Monolithic
Cap., • 001 uF Monolithic
Cap., .OluF Monolithic
Cap., lOOOuF 50V Alum. Electro
Cap., O.luF Monolithic
Cap., 0.luF Monolithic
PART NOMBER
Cl
C2
C3
C4
cs
C6
C7
CB
C9
ClO
Cll
Cl2
Cl3
Cl4
ClS
Cl6
Cl7
Cl8
Cl9
C20
C21
C22
C23
C24
C25
C26
C27
CRl
CR2
CR3
CR4
CRS
CR6
CR7
CR8
CR9
CRlO
CRll
CR12
36-83
36-58
36-58
36-91
36-78
36-58
36-83
23-1000-50
36-95
36-95
57-4934
57-4934
57-ERC82-004
57-FR107
55-5386
57-5391
57-4934
57-4148
57-4148
57-4148
Diode, IN4934
Diode, IN4934
Diode, ERC81-004
Diode, FR107
Diode, IN5386
Diode, IN5391
NOT USED
Diode, IN4934
NOT USED
Diode, IN4148
Diode, IN4148
Di od e , IN 414 8
Jl
318-25
Strip Connector (Cut into
6 & 7 conductor pieces)
J2
318-25
Strip Connector (Cut into
6 & 7 conductor pieces)
Ll
L2
43-6
43-6
Coil Assy. Inductor (42-58)
Coil Assy. Inductor (42-58)
SYMBOL
KINEMETRICS/
TRUJETtME
DESCRIPTION
SYMBOL
PART NUMBER
85-53
Printed Circuit Board
Ql
Q2
Q3
Q4
175-3904
175-D44Hll
175-3904
176-3904
Transistor
Transistor
Transistor
Transistor
NOTE:
All resistors are 1/4 Watt, 5%
Carbon Comp. unless otherwise noted.
Rl
R2
R3
R4
RS
R6
R7
211-3
2-89
8-3013
8-1003
2-169
8-3011
2-97
8-1501
8-1001
RB
°'
I
N
2-77
20-9
2-69
8-1001
2-97
2-97
8-1003
1--1
2-8S
2-49
2-89
8-1001
8-1001
2-97
2-101
2-85
20-9
10-lR-3
2-37
2-33
8-1001
8-1001
2-89
3-1000-0. 5
2-89
8-1003
2-113
2-138
8-7503
TRUETIME
DESCRIPTION
----
PART NUMBER
PCB
R9
RIO
Rll
Rl2
R13
R14
RlS
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
KINEMETRICS/
2N3904
D44Hll
2N3904
2N3904
Resistor, 47K
Resistor, 4.7K
Resistor, 301K, 1/8 W, 1% Film
Resistor, lOOK, 1/8 W, 1% Film
Resistor, lOM
Resistor, 3.0lK, 1/8 W, 1% Film
Resistor, lOK
Resistor, 1.SK, 1/8 W, 1% Film
Resistor, 1.0K, 1/8 W, 1% Film
Resistor, 1. SK
Pot., 5.0K Cermet
Resistor, 680 ohm
Resistor, 1.0K, 1/8 W, 1% Film
Resistor, lOK
Resistor, lOK
Resistor, lOOK, 1/8 W, 1% Film
Resistor, 1. OK, l / 8 W, 1 % Film
Resistor, 3.3K
Resistor, 100 ohm
Resistor, 4.7K
Resistor, LOK, 1/8 W, 1% Film
Resistor, 1.0K, 1/8 W, 1% Film
Resistor, lOK '
Resistor, 15K
Resistor, 3.3K
Pot., 5.0K Cermet
Resistro, 0.1 ohm, 3W, WW Carbon
Resistor, 33 ohm
Resistor, 22 ohm
Resistor, 1.0K, 1/8 W, 1% Film
Resistor, 1.0K, 1/8 W, 1% Film
Resistor, 4.7K
Resistor, 100 ohm, 1/2 W
NOT USED
Resistor, 4.7K
Resistor, lOOK, 1/8 W, 1% Film
NOT USED
Res stor, 47K
Res stor, 510K
Res star, 750K, 1/8 W, 1% Film
R41
R42
R43
8-1003
2-169
2-111
Resistor, lOOK, 1/8 W, 1% Film
Resistor, lOmeg.
Resist or, 39K
Tl
42-57
176-7912
176-78Ml2
176-79L05
176-8212
176-TL494
176-LM311
176-6N135
176-4049
176-4013
176-4093
176-4528
176-7808
Transformer
I . C. 7912, - l 2V Reg.
I.C. 7812, +12V Reg.
I.e. 79L05, -5V Reg.
I.C. ICL8212, Volt Monitor
I.C. 1~94, Switch Reg.
J.C. LM311N, Comparator
I.C. 6N135, Opto. Isolator
I.C. 4049, Hex Buffer
I.e. 4013, Dual D F/F
I.e. 4093, Quad 2 Schmit
I.e. 4528, Dual 1 Shot
I.e. 7808, +12V Reg.
370-1
370-2
363-2.0
253-4
251-4
Binding Post (Red)
Binding Post (Black)
Fuse, Slo Blo 2.0 amp
Washer, #4 Flat
Kepnut, #4
Ul
U2
U3
U4
us
U6
U7
U8
U9
UlO
Ull
U12
QTY
1
1
1
2
2
NOTE:
The following items are omitted or added
when the DC Power supply is installed.
OMIT
363-.750
342-1
86-52
315-20-4
315-20-7
Fuse, 3AG, 3/4A
Power Plug
P. W. Hoard Assy. Power Supply
Wire, #20AWG, Yellow
Wire, #20AWG, Violet
315-20-2
315-20-0
Wire, #20AWG, Black
Wire, #20AWG, Red
ADD
"°
6-35
SYMBOL DESIGNATION REFERENCE 86-53
(cont.)
O'\
I
w
'42-51
i I
0
W<
~-----!------------< J"1 - ~;+12V DC.
--<
Ji - 2<5;HC
rJ1·1;G.ND
J2 ·I0,7 +5V DC
J2-1-12v0C
J2-:i +12V DC
r:re-3;C:.IJD
~-----OVE:2. -C:.U22Ei.fr
...-+------------------------------------.
~
I.
ALL
2.·
ALL
UtJLE':l>;, NOTED.
C.APA.C.ITO~
IZE~\-.,TOlC
.A.EE
¢
r};
P2.IM"2.Y
PO'....Jt2 6G:nuND
CHA~IS GJZOt»JD:
l~!l
1
..,
AeE
VALUES
VALUE°='
~. L.OAt> 1'0\o./U! G:t~OU ~JD ~
1
I"-!
V.1C.12C~.l.RA.':"
\/4W, OMM""3.
{
IC
Ill~
•
'PISIC.S. LAST' L)SEJ;>:
en, CR1'2,J'Z., L.'21 &..... >RAl~,TIJlJl3
lr&F
~'S
FOR
.._..~P:F'C.t
MOi- ~Cl~
C.12''-
Cl'"I. CCZ-t, R54
"TO &II. cz•PL...•CEO l!!!i."'(
~~~~* ~~ci.4io~~~-s~~.,.~~J \~
6-36
SCHEMATIC - ASSEMBLY 86-53
..,.o aa
Hex NUT;..,.;~·~-:- t:,~ r,·.:;.,:../-:-5.A..!.GD
L.LJC-1<.'n.-t-.:)l-,C:/JC.
./£L; T"YP. ,Al.l. $A'C. C.&>Nl.JCC roe-:.
DC POWER SUPPLY OPTION
~EXISllNE.
6-38
8&-55 PCS
!!!,!!
6-37
6-39
REAR PANEL ASSEMBLY 220-30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SUBCHASSIS ASSEMBLY 221-30
_ul#.$7)/tt.
--~"Co-"'------ ----
~
216-30
365-1
342-1
61-14
375-1
256-.375
255-4-4
240-4-2
240-4-3
253-4
265-4
251-4
277-2
241-6-2
277-6
134-24
241-6-5
255-6-2
363-. 750
282-1
DESCRIPTION
Rear Panel
Fuse Holder
Power Socket & Line Filter
Thumb Wheel Switch
(+, - and 0-9)
BNC Connector
Solder Lug. . 375" I.D.
Spacer, 4-40 x 1/2" Threaded
Screw, 4-40 x 1/4" Long PHMS
Screw, 4-40 x 3/8" Long PHMS
Washer i4 Flat
Lockwasher #4 Internal Teeth
Kepnut, 4-40
Spacer, Circuit Board, 1/ 4" Lg.
Screw, 6-32 x l / 4" Long FHMS
Spacer, PCB 3/8" Lg.
NOT USED
NOT USED
~M i~~E~arness (Not Shown)
3
2
1
1
4
3
2
4
2
4
2
0
0
1
0
0
NOT USED
Screw, 6-32 x 5/8" Long FHMS
2
Spacer, 6-32 x 1/4" Long Hex. Nylon 2
Fuse, 3 AG, 3/4 A
1
A/R
Adhesive, Loclct ite
~()/,+'~~/
-----;- _______
l_J
-J- __ _
~
6-40
llllEMETB.ICS/
TR.UETIHE
PART HUMBER.
PARTS LIST 220-30
'"'STALL TAPe
Oti'i:R THI"!> EDC.1!"
PARTS LIST 221-30
l!!!IB..M..E!!!.!CS/
1
2
3
4
5
6
7
8
9
10
11
TR.UETIHE
PART HUMBER
DESCRIPTION
215-30
277-2
247-6-2
240-6-2
277-6
253-6
282-1
73-16
289-1
268-6-2
241-6-5
Sub-Chass is
Spacer, P.W. Board 1/4" Long
Screw, 6-32 X 1/4" Long FHMS
Screw, 6-32 x 1/4" Long PHMS
Spacer, P.C.B. Support, 3/8 Lg.
Washer, #6 Flat
Adhesive, Lod:t i te
Grommet, Rubber
Tape, Adhesive, 1/4" W., Mylar
Spacer, 6-32 x 1/4" Lg., Nylon
Screw, 6-32 x 5/8" Lg., FHMS
1
5
5
2
2
2
AIR
1
A/R
l
l
6-31
°'
w
I
N
M/S7;J/.U ;ISllSf(///lf6.P
(';71;/.S-i?ACY}
PARTS LIST
6-42
UllEllETUCS/
ITEM
Tl.UETUIE
PART ~
DESCRIPTION
220-10
Rear Panel Assembly
221-30
~~~~~~se~~/US/~·1.Y Lg. FHMS
241-B-5
100-70
217-10
251-8
~
9
10
II
12
J3
14
15
16
17
18
19
10
l1
203-•
60-1
Switch, SPOT
LEO, GRN. (Part of Assy 86-43)
210-2
Bezel, Plastic
86-71
8&- ]~
86-.:.2
86-43
86-52
PC 8d. Assy., Detector
106-30
375-1
256-.375
2]
240-L.-l
253-4
265-4
24
2;2-4
2;
261-1
240-4-2
2'H-IJ
22
26
",.
"
28
l<>
32
l\
l•
Ji
16
Panel, Fronl
Plate, Side Mounting
lr::epnut, #8
HOT USED
Cover, Top & Bor tom
NOT USED
PC Bd. Assv., Analog
PC Bd. ASliy., Digital
PC 8d. As.sy., Display
PC Bd. Assy., Power Supply
Plate. BNC Mounting
BNC Connect or
.37~"
Solder Lug.,
Screw, 4-40
I.D.
3/8" Lg., PHMS
Washe1", It. Flat
Loclc..,asher, #4 Int.. Teeth
Nut, 4-40 Hex
Rubber Feet
Screw,4-40
Kepnut, 16
111.i" Lg.,
24
NOT USED
263-1
271-4
272-2
Chassis Shim
Shoulder Washer, 14
Insulator, !11..::a
A/R
I
l
HOT USED
NOT USED
255-100
177-1764
2l.i9-l
J32-2
Power Cord
38
39
206-1
400-1
4t;
281-1
Bracket, Rack Mtg. (Not Shown)
Name Pl.ate, Product I .D.
Compound, Thermal (Nol Shown)
Adhesnre, Locktite (Not Shown)
NOT USED
8raid, Tinned Copper
41
282-2
~i
320-1
32~-.r.
400-l.
27t...-
~
(Not
Shown)
t!~:r~"~;oj~ ~a~:~· c~~~ i~~~~~)
8
Hole Plug
Mtg. Hardware for
P/N 58-1
6-41
llllEllETll.ICS/
Tll.UETl"E
.ill!!~~
Spacer, tr.-40
l/4" Lg.
l .c .. 2764
(U5. lnstall1td
86-42)
Screw, 4-40 x 1/4" Lg., FHHS, Blk
1'
45
46
41
48
NOTE:
When Opt ion Assembly 86-44 1 86-46 or 86-47 is ordered
item• 18, 19 and 20 will be deleted. Two each of 1ceoms 21 o1nd
will be deleted and replaced with P/N 2Sl-4, 14 Kepnut.
PHMS
s
l
2
50
401-2-1-1
176-2bLS31
On 86-42:
Header, 8 Pin
(401-2-1-8) (Jl2)
l .C., (U9) 26LS31
l
A/R
AIR
51
392-5
52
AIR
53
54
206-24
240-4-3
AIR
l
55
AIR
1 Set
56
253-4
251-4
366-2.0
On 22tl-30:
Cabll' Auy., RS-422 (Pl2)
Mtg.
Bracket
Screw, 4-40 x 3/8" Lg.,PHMS
Washei·, #4 Flat
Kepnur, 4-ltO
Circuit Brkr., 2A
(lnstal l
in place of
l
fuse
bi
fuseholder)
MODEL 468-DC FINAL ASSEMBLY 151-70
6-43
MODEL A-468MS FINAL ASSEMBLY 142-170
e-
_____~:cP:.
.,,
6-44
t
6-45
PARTS LIST 142-170
~
ll:INEMETRICS/
TB.UETIME
PART NUMBER
1
2
3
4
5
6
7
8
9
10
II
12
13
141-170
138-171
85-13
381-lA
227-16
141-173
138-174
248-. 31-8
254-.312
252-.312
400-2
400-1
285-1
DESCRIPTION
!}:!!.
Antenna Sub-Assy.
(NOT SHOWN)
Satellite Antenna PCB
Cover
Connector, SMA Flange Mt.
Dome Cover
1
l
l
l
I
1
Antenna Mtg. Kit
Pivot Bracket
I
Screw, Hex 5/16-18 x l" Lg.
4
Lock washer, 5/16 Split
4
Hex Nut 5/16-18
4
Label, Product Warranty (NOT SHOWN) l
Label, Product I.D. (NOT SHOWN)
l
Sealant, Silicone
A/R
MODEL A-468MS SUB-ASSEMBLY 141-170
+
@- - - - - - - - - - -
~i-
---------
-~)
I
.....-----------------------.-1 :
6-46
~
s
I
6
I
I
7
8
\O'-:
9
10
r1
PARTS LIST 141-170
ICINEMETRICS/
TRUETIME
PART NUMBER
DESCRIPTION
138-1 70
86-170
339-6-0
468MHz Down Converter PCB Assy.
Cable Assy. (Male SMA to Male SMA)
337-4
Cable, CoaA RG 188 A/U
383-1
256-.625
240-6-2
240-8-4
257-8
265-6
Connector N (Solder Cup)
Solder Lug, 5/8" I. D.
Screw, PAN HD, 6-32 x 1/4 Lg.
Screw, PAN HD, 6-32 x 1/2 Lg.
Washer, Seal #8
Lockwasher, #6 Int. Teeth
Antenna Box
6-33
A/R
l
l
5
l
l
5
6-47
MODEL A-468HX SUB-ASSEMBLY 141-171
,--------11.5 _ ____..,_. _r-1.o·TYP
-------._1,......._-t'
r..--+---;~, - _
I
-$---1
1
- - --~ i
1
I
4.0
4.o
-1~1
-.34 D.
6 HOLES
FIGURE 7-5
A-468RK AND A-468RKC MOUNTING DIMENSIONS
7-7
7-20
Once the Model A-468MS or A-468HX is mounted and
installed, as described earlier in this section, the Model 468RK should be mounted within the 25 ft. cable run of the antenna.
To connect the system:
7-21
1)
Using the provided 25 foot cable (RG-8U), connect
one end of the cable to the receiving antenna
out put "N" connector. Connect the other end to
the A-468RK "N'' connector labeled "FROM ANTENNA".
2)
Connect the 50 ft. lead-in coax (RG-58/U) to the
"N" conn e c tor 1 ab e 1 e d "T 0 REC E I VER".
The
remaining end of this 50 ft. cable is provided
with a BNC for connect ion to the "ANTENNA" input
on the Model 468-DC Synchronized Clock.
MODEL A-468RKC
7-22
The Model A-468RKC is normally ordered as a "no-charge"
option whenever the user wishes to use his own signal receiving
medium, such as an aircraft fin antenna. This A-468RKC consists
of all the same electronics housed in the Model A-468MS or
A-468HX antenna, but repackaged in a single housing without the
receiving medium.
7-23
When a Model
are supplied:
468-RKC is ordered, the following items
1)
Antenna electronics housing (Model A-468RKC)
2)
50 ft lead-in coax, RG-58/U
7- 24
The input conn e c tor for the A- 4 6 8 RKC i s an "N" con nector to accept the 468MHz signal from the users antenna. The
input cable from your receiving medium should be kept as short as
possible. It is recommended that RG-8 or RG8X cable be used and
kept less than 3 feet.
If RG-58/U is used, a length of less than
1 foot must be used.
7-25
The A-468RKC is identical in size and mounting pattern
as the A-468RK as shown in FIGURES 7-4 and 7-5.
7-26
For the ouput from the A-468RKC, a 50 foot length of
RG-58/U is provided. From the connector labeled "TO RECEIVER",
connect the appropriate end of this lead-in coax. Connect the
other end to the Model 468 "ANTENNA" input connector (BNC).
Additional cable in 50 and 100 foot lengths can be obtained from
TrueTime.
These additional lengths have BNC connectors on both
ends and includes a jack-to-jack adapter allowing the cables to
be connected end to end.
7-27
EXTERNAL ANTENNA INPUT
7-28
This option can be ordered in conjunction with the
standard Model A-468MS, or A-468HX antenna. When ordered, it
7-8
allows the unit to operate as a standard antenna or through the
use of an input from an "external antenna".
7- 29
Wi t h th i s opt ion , t wo 11 N'' c on n e c tor s a r e fa c t or y in stalled on the side of the antenna case and a short coax is
connected between them. When the signal is received in the helix
or through the microstrip, the signal goes out through the
connector labeled "FROM ANTENNA", through the short coax and into
the unlabeled "N'' connector.
If the jumper is disconnected from
the un 1 ab el ed "N" connector, the ex ter na 1 antenna can be fed
directly into the pre-amp.
7-30
basically
The size
unchanged
This option allows versatile input to the pre-amp and
allows the standard unit to be used as a Model 468-RKC.
and installation of the Model A-468MS or A-468HX is
by this option.
7-9
SECTION VIII
IRIG-B AND IRIG-H TIME CODE FORMAT
8-1
INTRODUCTION
8-2
and
The IRIG-B Time Code as outputted from the Model 468-DC
IRIG-H if optionally
ordered, I.
is- -as described in "IRIG
...
.::> 11\l~Ul\KU l ll"lr. r UK.l"ll\ i .::>
ie i.e-1..,,omm un ic a r ions wor King \..Jroup, 1 nrer Range Instrumentation Group, Range Commanders Council, IRIG
Document 104-70.
This document is published by Secretariat,
Range Commanders Council, White Sands Missile Range, New Mexico,
88002 dated August 1970.
,.,mA"l.TT"'\..AT"'\T"'\..
~T . . . ~
~"'T"'\
Am~•·
m_.,
-
,..,_
•
-
TT
_
_
1.
,., - -
'T'
•
8-3
The standard time formats described in this publication
were designed for use in missile, satellite and spaceresearch
programs which require the use of a standardized time format for
the efficient interchange of test data among the various users of
the data.
These formats are suitable for recording on magnetic
tape, oscillographs, film and for real-time transmission in both
automatic and manual data reduction. The IRIG-B format from the
Model 468-DC is suitable for remote display driving, recording on
magnetic tape and many other uses. When the output is used as
IRIG-B in the strict sense as described by the above mentioned
document, the output must be in Universal Coordinated Time (UTC)
and not converted to 12-hour basis or local time zone as is the
capability of this instrument. The same is, of course, true of
the IRIG-H output.
8-4
IRIG CODE FORMAT
8-5
The IRIG-B and
IRIG-H Time Code as provided by the
Model 468-DC is a serial time format with two coded expressions.
The first expression is a time-of-year code word in Binary Coded
Decimal (BCD) notation as days, hours, minutes and seconds.
The
second expression used here is a set of elements for encoding
control functions which are used in the Model 468-DC to provide
the user with worst case estimate of the timing accuracy. The
estimate for this timing accuracy is discussed in SECTION III,
entitled DISPLAY and also PARALLEL BCD TIME OUTPUT (Special Order
Option), of this manual. The third expression sometimes found in
the IRIG code, which is an expression of time-of-day in Straight
Binary Seconds (SBS) notation, is not outputted by the Model
468-DC.
8-6
Each pulse, or element, in the format of the levelshift encoded signal has a leading edge which is "on time"e
The
repetition rate of the elements in the IRIG-B is 100 pulses per
second and l pulse per second in IRIG-H.
The index count inter-
val, or the time between the leading edges of two consecutive
elements, is 0.01 seconds with IRIG-B and 1 second with IRIG-H.
8-1
8-7
The time frame format begins with a frame reference
marker and consists of all the elements between two consecutive
frame reference markers. This frame reference marker consists of
a consecutive position identifier element and a "P" reference
element each having a duration of 0.008 seconds in IRIG-B and .8
seconds in IRIG-H. The on time reference point of time frame is
the leading edge of the second pulse. The repetition ~ate of the
time frame called the "time frame rate" is 1 fps (frame per
second) with IRIG-B and 1 fpm (frame per minute) with IRIG-H. Po
occurs one index count interval before the frame reference point
and each succeeding position identifier (P1, P2, P3, P4, etc.)
occurs every succeeding tenth element. The repetition rate then,
of the position identifiers, is 10 pps in IRIG-B and 6 ppm in
IRIG-H. There are seven position identifiers per IRIG-H frame
and 11 position identifiers per IRIG-B frame.
8-8
The BCD time-of-year code word is pulse width coded. A
binary "l" element has a duration of 0.005 seconds, a binary "O"
has a duration of 0.002 seconds for IRIG-B. IRIG-H in .5 seconds
for a "l" and .2 seconds for a .. O". This format is then used to
encode the BCD time-of-year code word which consists of decimal
digits in a 1-2-4-8 binary sequence.
8-9
When the IRIG-B from the Model 468-DC is in the amplitude modulated 1 KHz format, the sine wave carrier frequency is
synchronized to have a positive going axis crossing coincident
with the leading edge of the modulating format elements. The
IRIG-H format is D.C. level shift format as supplied by the
factory.
See SECTION I I I, entitled IRIG-H (Special Order
Option).
8-10
FIGURE 8-1 on the following page depicts the IRIG-B
Time Code, and FIGURE 8-2 depicts IRIG-H.
8-11
CONTROL-FUNCTIONS
8-12
The control functions provide the user of the IRIG-B
Time Code with a record in their recording of the estimated worst
case accuracy of the Model 468-DC time information. This is more
fully covered in SECTION III, under DISPLAY and PARALLEL BCD TIME
OUTPUT (Special Order Option). A "l" or .005 second pulse width
in the following locations signify the accuracy specifically.
Control
Control
Control
Control
Control
Function
Function
Function
Function
Function
Elanent
Elanent
Elanent
Elanent
Elanent
4
6
7
8
9
(or
(or
(or
(or
(or
time
time
time
time
time
Pr+53Qns)
Pr+55Qns)
Pr+560ms)
Pr+57Qns)
Pr+580ms)
in-lock indicator
indicates +l.Oms worst case
indicates +5.0ms worst case
indicates +50.Qns worst case
indicates +"500.Qns worst case
8-13
This information is also utilized by the TrueTime Model
RD-B to duplicate the display of the 468-DC Master Clock. At
+50ms the colons are flashed, and at +SOOms the display will
blink on the Model RD-B.
8-14
The IRIG-H Time Code does not contain these control
bits.
These have not been included due to the relative time
frames and usage of this code as opposed to the IRIG-B Code.
TIME FRAME
0
20
10
- - - R E F . TIME
1R
1 SECOND
30
so
40
INDEX COUNT (0.01 SECONDS)
REF. MARKER
CONDS
I
_flf
MINUTES
10 20 40
1
1n
~ ~SMS
l
2 4
8
10 20 40
~POINTA
2MS
BINARY 'O'
(TYPICAL)
so
60
HOURS
DAY
~
1248
1
1020
2 4 8
10:!)4080
100 200
P211
11
SMS
l~NARY
'1'
(TYPICAL)
80
70
0
90
. 1 SEC. INDEX MARK ER
.01 SEC. INDEX MARK ER
r
.
I
_
(TIME OF DAY)
STRAIGHT BINARY SECONDS 17-BITS
CONTROL FUNCTIONS
~~~~~~~~~~~~~~
\___
. PS
.
P9
PO
Time at this point equals 173 Days, 21 Hrs., 18 Mins., 42.7SO Sec.
IRIG STANDARD TIME CODE
FORMAT 'B'
( 100 pps Code)
Reference I RIG Document 104-70
FIGURE 8-1
IRIG-B TIME CODE FORMAT
8-3
TIME FRAME
0
1nnur
PO
20
10
40
INDEX COUNT l SEC.
REFERENCE MARKER
MINUTES
DAYS
~--~'-------...
JLn--~~-~~
II
f.-o.s
-+j
l MINUTE
30
-.J~~~?A~~C: O'
11
SEC.
hYPICAL)
k
0.5 SEC.
BINARY 'l'
(TYPICAL)
5-------~
50
0
CONTROL FUNCTIONS
\_:o
Time at this point equals 173 days, 21 hours, 24 minutes, 57 seconds
G.
T_L~
T
3.3X X
TYPICAL MODULATED CARRIER
Recommended Frequency 100 Hz or 1000 Hz
FIGURE 8-2
8-4
IRIG-H TIME CODE FORMAT
IRIG STANDARD TIME CODE
FORMAT 'H'
(l PPS Code)
Reference IR I G Document 104-70
50
IN CASE OF FAILURE
FOLLOW UP INFORMATION EXCHANGE
---------------S/N-------OPTIONS
OPTIONS
MODEL
MODEL
First contact the Service Department at Kinemetrics/True
Time at (707) 528-1230. Complete this form, attach to
instrument and forward to Kinemetr ics/TrueTime.
Please fill in and mail on
(One Year).
1. How is the instrument us_ed_?__- - - - - - - -
NAME
2. Describe any problems or changes you would like to see
Describe Problem/Symptoms:
Failure Mode is:D
Constant
D
Intermittent
--------S/N
NAME
CCl1PANY
-----------------------------------------------CITY---------------·-------
-------------------
C:Cl1PANY
-----------------------
STREET
-------------------CITY-----------
STREET
STATE
---------
---------------
ZIP
PHONE NO.
STATE
ZIP
-----
~-----------
----------------PHONE
IN CASE OF FAILURE
NO.
-----------------
USER REGISTRATION
MODEL
MODEL
First contact the Service Department at Kinemetrics/True
Time at (707) 528-1230. Complete this form, attach to
instrument and forward to Kinemetr ics/TrueTime.
Please complete this card and return to Kinemetrics/True
Time. This will allow us to keep you directly informed
of any manual correct ions or additions and application
notes which apply to your particular instrument.
---------------S/N-------OPTIONS
Describe Problem/Symptoms:
Failure Mode is: D
Constant
Intermittent
NAME
D
OPTIONS
NAME
-------------------,COMPANY
STREET
---------------------------CITY-----------------
COMPANY
~-----------------
STREET
--------------S/N
----------------------
-----------------------CITY----------------STATE
------ ZIP---------------PHONE NO.----------------
STATE
ZIP
PHONE NO.
-------- ------------------
-------------
KINEMETRICS I TRUETIME
KINEMETRICS I TRUETIME
3243 Santa Rosa Ave.
3243 Santa Rosa Ave.
Santa Rosa, CA 95407
Santa Rosa, CA 95407
KINEMETRICS /TRUETIME
KINEMETRICS I TRUETIME
3243 Santa Rosa Ave.
3243 Santa Rosa Ave.
Santa Rosa, CA 95407
Santa Rosa, CA 95407
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.6 Linearized : No Create Date : 2015:04:27 14:58:23-08:00 Modify Date : 2015:04:27 15:14:27-07:00 XMP Toolkit : Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03 Metadata Date : 2015:04:27 15:14:27-07:00 Producer : Acrobat 11.0.10 Paper Capture Plug-in Format : application/pdf Document ID : uuid:f79158fd-87e0-ba46-a9a8-b5922f625415 Instance ID : uuid:13ae9cb0-03e8-a249-b205-cfe659fa8be3 Page Layout : SinglePage Page Mode : UseNone Page Count : 154EXIF Metadata provided by EXIF.tools