CalAmp Wireless Networks 2424094-001 User Manual 8

CalAmp Wireless Networks Corporation 8

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Document Title	8

3492 SYNTHESIZED 900 MHZ TRANSCEIVER
SERVICE MANUAL
Copyright© 1997 by the Johnson Data Telemetry Corporation,
The Johnson Data Telemetry Corporation designs and manufactures radios and radio modems to serve a wide variety of data
communication needs The Johnson Data Telemetry Corporation produces equipment for the fixed data market including
SCADA systems for utilities, petrochemical, waste and fresh water management markets and RF boards for OEM applications
in the Radio Frequency Data Capture market. In addition, the Johnson Data Telemetry Corporation provides wireless commu-
nication solutions to the mobile data market sewing public safety, utilities and industrial users.
DATA TELEMETRY PRODUCT WARRANTY
The manufacturer“: warranty statement for this product is available from your product supplier or from the Johnson Data
Telemetry Corporation, 299 Johnson Avenue. PO Box 1733, Waseca, MN 56093-0833. Phone (507) 83543819,
WARNING
This device complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause han'n-
ful interference. In addition, changes or modiﬁcation to this equipment not expressly approved by the Johnson Data Teleme-
try Corporation could void the user‘s authority to operate this equipment (FCC rules, 47CFR Pan 15.19).
DO NOT allow the antenna to come close to or touch, the eyes. fate, or any exposed body parts while the radio is transmitting,
DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere.
DO NOT operate the radio unless all the radio frequency connectors are secure and any open connectors are properly termi-
nated.
DO NOT allow children to operate transmitter equipped radio equipment.
SAFETY INFORMATION
Proper operation of this radio will result in user exposure below the Occupational Safety and Health Act and Federal Commu-
nication Commission limits,
The infonnation in this document is subject to change without notice.
April 1997
Part No. 001-3492-001
,4__—__—-—-——————————————"—
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
11
2.2
3.1
3.2
3.3
3.4
4.1
4.2
TABLE OF CONTENTS
GENERAL INFORMATION
SCOPE OF MANUAL ......................... _ 1.1
EQUIPMENT DESCRIPTION , 1-1
GENERAL ................. . 1-1
DL3492 WITH LOADER BOARD . 1-1
DL3492 WITH MODEM .............. 1.2
DM3492 SYNTHESIZER PROGRAMMmG . 1-2
TRANSCEIVER IDENTIFICATION . . 1-2
ACCESSORIES ................ 1-2
PART NUMBER BREAKDOWN . l-Z
FACTORY CUSTOMER SERVICE . 1-3
PRODUCT WARRANTY ...................... 1-3
REPLACEMENT PARTS. 1-3
FACTORY RETURNS . . . 1-3
INSTALLATION
PRE~INSTALLATION CHECKS .......
INTERFACING WITH DATA EQUIPME .
DM3492 (RF Board) ...........................
PROGRAMMING
INTRODUCTION ............................ . 3-1
DM3492 SYNTHESIZER DATA PROTOCOL . 3-1
GENERAL ............ . 3-1
SYNTI-IESIER DATA . 3-1
D-WORD CALCULATION (24 BITS) ............. 1 3-1
C-WORD CALCULATION (24 BTTS) . 3-2
B»WORD CALCULATION (24 BITS). . 3»2
AO-WORD CALCULATION (24 BIT S) ............ . 3-2
TX I RX FREQUENCY SHIFT AND BAND SELECTION . . 3-3
RADIO DIAGNOSTICS ........................
RECEIVE TO TRANSMIT SEQUENCE .
TRANSMTT TO RECEIVE SEQUENCE .........
CIRCUlT DESCRIPTION
GENERAL ...........
INTRODUCTION , .
SY'N'I'HESIZER. .
RECEIVER. 1 1 .
TRANSMITTER .
SYNTHESIZER .......
VOLTAGE-CONTROLLED OSCILLATOR ........
VCO AND RB-‘ERENCE OSCIIJATOR MODULATION .
CASCADE AMPLIFIERS . .
AMPLIFIER. 1 .
VOLTAGE FILTER. . 1
VCO FREQUENCY SHIFT.
SYNTHESIHR INTEGRATED CIRCUIT (UBOO) .
LOCK DEFECT ...............................
TABLE OF CONTENTS
RECEIVER CIRCUIT DESCRIPTION ........ . . . . ,,,,, 4.5
CERAMIC FILTER RF AMPLIFIER 4.5
MIXER ............................... . . 4-5
FIRST LO AMPLIFIER ...... 4.5
CRYSTAL FILTER, FIRST IF SECTION ............ 4-6
SECOND LOIMIXER/DETECTOR ..... . 4-6
TRANSMITTER CIRCUIT DESCRIPTION .......... . . . . 4-7
DRIVER ............................. 4.7
FINAL, COMPARATOR ............. . 4-7
ANTENNA SWlTCH ........
TRANSMlT KEY-UP CONTROL
VOLTAGE REGULATORS ..... . _ .4—8
+9.6 AND +5.5V REGULATED ......... 4-8
SERVICING
GENERAL ............. ...,5-l
PERIODIC CHECKS ..... , 5.|
SURFACE-MOUNTED COMPONENTS ........ , , 4 5-1
SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS . . . 5-1
REPLACEMENT PARTS LIST ................. , S-I
TCXO MODULE NOT SERVICEABLE . , _ 5.1
SYNTHESIZER SERVICING A . A .5-I
INTRODUCTION ..................... . S-I
REFERENCE OSCILLATOR .......... 5—1
VCO ......... . 5-1
SYNTHESIZER ( 00). 5-2
RECEIVER SERVICING ................ . 4 . 5-2
SUPPLY VOLTAGES AND CURRENT . 5~2
MIXER/DETECTOR . . . . . . . 5-2
SECOND L0 ...... ., 5—3
AUDIO BUFFER AMP ..., .. 5-3
CRYSTAL mTERS ........ . . . . 5-3
MIXER ....................... . . 5—3
LOW NOISE AMPLIFIER (LNA). A . 5-3
ANTENNA SWITCH ........ .. 5-3
TRANSMITTER SERVICING . . 5-3
5-3
. 5-3
SUPPLY VOLTAGES AND CURRENT ,
VCO ...................
FINAL AMPLIFIER. ...... 4
ANTENNA SWTI‘CH. . 5-3
MODULATION INPUT. . . . . . 5-4
TCXO ...................... . 5-4
6.1
6.2
63
6.4
6.5
6.6
6.7
TABLE OF CONTENTS
ALIGNMENT PROCEDURE
GENERAL ........................
TEST EQUIPMENT
INITIAL SETTINGS ........
VCO CONTROL VOLTAGE. ‘ . . .
TRANSMITTER AND FREQUENCY .
MODULATION ALIGNMENT ........
TRANSMITTER/FREQUENCY WITH DOADER
MODULATION ADJUSTMENT .......
RECEIVER ........................
PARTS LIST
SCII'EMATICS AND COMPONENT LAYOUTS
TABLE OF CONTENTS
SECTION 1 GENERAL INFORMATION
I.1 SCOPE OF MANUAL
This service manual contains alignment and ser-
vice information for the JDT DM3492 900 MHz Syn-
thesized Telemetry Unit.
This manual concentrates on the RF section of
the data link which may be paired with an intemal
Loader board or 9600 baud Modem board.
Service manuals addressing items speciﬁc to the
Loader board (001-3240-001) and the Modem board
(001-3276-001) should be referenced for the users
speciﬁc conﬁguration.
1.2 EQUIPMENT DESCRIPTION
1.2.1 GENERAL
The JDT DM3492 is a synthesized data trans-
ceiver (transmitter and receiver) which operates in the
928-960 MHz UHF frequency range. Transmitter
power output is 1-5 watts, SW at 13.3V nominal, and
operation is simplex or half duplex.
In addition to this 900 MHz radio, JDT has a full
line of radios and radio modems to meet wireless data
communication needs. Both OEM RF decks and com-
plete FCC type approved radios and radio modems are
available from 132—174 W-Iz at VHF, 380-512 MHz
at UHF and 928-960 MHz at 900 MHz in both SW
and 2W units (VHF and UHF). High Speciﬁcation
units are available to meet lntematiunal requirements
and bandwidths no meet U.S.A. refarming require-
mems. To lcam more about the other JDT products,
call 1-800-992-7774 or 1—612'890-SI 55 to speak to a
sales representative.
l-1
1.2.2 DL3492 WITH LOADER BOARD
The DL3492 (Pan No. 242-3492-5x0) includes
the 8-channel Loader Board (Part No. 023-3240-001),
which performs synthesizer loading through an
RS-232 DB-9 interface. The Loader Board has cir-
cuitry which provides electronic control of the
following:
- Transmit/Receive data conditioning and gating
Carrier Detect
Power Control
Preselector Tracking
Modulation Flamess
Audio/Data Filtering
Sleep/Wakevup to minimize current consumption
Diagnostics that include:
Input Voltage Sense
Input Current Sense
Ambient Temperature Sense
RSSI Indicator (RSSI Sense)
Forward/Reverse Power Sense.
The gating circuits allow the type of data ﬁlter-
ing to be selected (standard or wide band) and also
pre-emphasis/de-emphasis to be enabled or disabled.
This board is programmed using an IBM" PC or
compatible computer and the Johnson Data Telemetry
programming software. Programming information is
stored by an EEPROM on the Loader board. Referto
Section 3.3 for programming information.
June 1997
Part No. 001-3492-001
NERAL INFORMATION
OT E: The synthesizer must be loaded each time pow-
' is turned on. Therefore, one loader board or ous-
mer supplied programming circuit is required for
tch data transceiver.
2.3 DL3492 WITH MODEM
The DL3492 (Part No. 242-3492-5x0) includes
c 9600 baud Modem (Part No. 023-3276—001),
hich supports the RNETTM communication proto-
rl, allowing data communication between the
hnson Data Telemetry high speciﬁcation synthe»
Led products and the Motorola RNET radio/
odems.
tc Modem features include:
User Programmable Data Rates; 9600, 4800, 2400
and 1200 baud in a 25 kHz bandwidth.
RS-232 compatible.
Simplex or Half-Duplex operation.
RTS~CTS handshaking protocol with option for
conﬁguring any two units as a digital repeater.
Supports asynchronous, serial or transpwenl data
formats.
Front panel LEDs provide indication for Transmit,
Receive and Power.
Built-In Diagnostics rcponed both locally and
"Over-The-Air":
Reports speciﬁc unit programming
Loopback test feature
RSSI
Forward and Reﬂected Power
Temperature
Supply Voltage
8-Channels programmable with option to switch
channels remotely "Over-The-Air".
This board is programmed using an IBM PC or
1patible computer and the RSS programming soft-
c. The 3276 Modern Programming Kit (Part No.
-3276~005) includes programming instructions
tained in the R55 Manual.
5 1997
N0. 001-3492~001
1.2.4 DM349Z SYNTHESIZER PROGRAMMING
The DM3492, when used without the Universal
Loader Board (Part No. 023-3240-001) requires cus-
tomer supplied circuitry to load the synthesizer with
channel information. The protocol that this circuitry
must follow is described in Section 3.
1.3 TRANSCEIVER IDENTIFICATION
The transceiver identiﬁcation number is printed
on a label that is afﬁxed to the PC board. The follow-
ing information is contained in that number:
Modal "WT “mm“ Pl-u hm?
"ﬁrms-ti wakes L
1.4 ACCESSORIES
Accessories available for the 3492 data trans-
ceiver are listed in Table 1-1.
Table 1-1 ACCESSORIES
3276 Service Manual
00 1-3276—00 l
001-3240-001
023-3472-007
3240 Service Manual
Interface cable
1.5 PART NUMBER BREAIGJOWN
The following is a breakdown ofthe pan number
used to identify this transceiver:
242—3492 - 5 X 0
l: [2.5 kHz BW
3:25 kHz BW
5 = 928-960 MHz
1.6 FACTORY CUSTOMER SERVICE
The Customer Service Department of the
Johnson Data Telemetry Corporation provides cus-
tomer assistance on technical problems and the avail-
ability of local and factory repair facilities. Customer
Service hours are 7:30 am. - 4:30 pm. Central Time,
Monday - Friday, “There is also a 24-hour emergency
technical support telephone numbert From within the
continental United States, the Customer Service
Department can be reached at this toll-free number
1-800-992-7774
When your call is answered at the Johnson Data
Telemetry Corporation, you will hear a brief message
informing you of numbers that can be entered to reach
various departments. This number may be entered
during or aﬁer the message using a tone-type tele-
phone. If you have a pulse-type telephone, wait until
the message is ﬁnished and an operator will come on
the line to assist you. When you enter a ﬁrst number
of "3", another number is requested to further catego-
rize the type of information you need. You may also
enter the 4-digit extension number of the person that
you want to reach if you know what it is.
FAX Machine - Sales
FAX Machine - Cust Serv
(507) 835-6485
(507) 835~6969
If you are calling from outside the continental
United States. the Customer Service telephone num-
bers are as follows:
Customer Service Department - (507) 835-69] 1
Customer Service FAX Machine - (507) 835-6969
You may also contact the Customer Service
Department by mail. Please include all information
that may be helpful in solving your problem. The
mailing address is as follows:
Johnson Data Telemetry Corporation
Customer Service Department
299 Johnson Avenue
PO. Box 1733
Waseca, MN 56093-0833
GENERAL [N FORMATION
1.7 PRODUCT WARRANTY
The warranty statement for this transceiver is
available from your product supplier or from the War»
rarity Department, Johnson Data Telemetry Corpora-
tion, 299 Johnson Avenue, PO Box 1733, Waseea,
MN 56093-0833. This information may also be
requested by phone from the Warranty Depamnent.
The Warranty Department may also be contacted for
Warranty Service Reports, claim forms, or any ques-
tions concerning warranties or warranty service by
dialing (507) 8356970.
1.8 REPLACEMENT PARTS
Replacement pans can be ordered directly from
the Service Parts Department. To order parts by
phone, dial the toll—free number and then enter “3" as
described in Section L6. When ordering, please sup-
ply the part number and quantity of each pan ordered.
Johnson Data Telemetry dealers also need to give their
account number.
If there is uncertainty about the part number,
include the designator (C l 12, for example) and the
model number of the equipment the part is from (refer
to Section 1.3).
You may also send your order by mail or FAX.
The mailing address is as follows and the FAX num-
ber is shown in Section l.6.
Johnson Data Telemetry Corporation
Service Parts Department
299 Johnson Avenue
PO Box 1733
Waseca, MN 56093-0833
1.9 FACTORY RETURNS
Repair service is normally available through local
authorized Johnson Data Telemetry Land Mobile
Radio Service Centers. If local service is not avail-
able, the equipment can be returned to the factory for
repair. However, it is recommended that you contact
the Field Service Department before remming equip-
ment. A service representative may be able to suggest
a solution to the problem so that return of the equip-
ment would not be necessary. If using the toll»free
number in the preceding section, enter "3".
June 1997
Part No. 001 {Mn-001
________________________________________.___—-———-—-
ENERAL INFORMATION
Be sure to ﬁll out a Facmry Repair Request Form
271 for each unit to be repaired, whether it is in or
it ofwarrantyt These forms are available free of
large by calling the repair lab (see Section 1.6) or by
questing them when you send a unit in for repair.
learly describe the diﬁiculty experienced in the
race provided and also note any prior physical dam-
;e to the equipment. Include a form in the shipping
ntainer with each unit. Your phone number and
meet name are very impcmnt because there are
nes when the technicians have speciﬁc questions
at need to be answered in order to completely iden-
'y and repair a problem.
When returning equipment for repair, it is also a
0d idea to use a P0 number or some other reference
mber on your paperwork in case you need to call
: repair lab about your unit. These numbers are ref-
:nced on the repair order to make it easier and faster
locate your unit in the lab
Return Authoriution (RA) numbers are not nec-
;ary unless you have been given one by the Field
rvice Department. They require RA numbers for
mange units or if they want to be aware of a spe-
ic problem. If you have been given an RA number,
"erence this number on the Factory Repair Request
rm sent with the unit. The repair lab will then con-
1 the Field Service Department when the unit
rves.
l 997
No. 001-3492-001 1.4
GENERAL INFORMATION
3492 URI SYNTHESIZED TELEMETRY UNIT SPECIFICATIONS
The following are general speciﬁcations intended for use in testing and servicing this transceiver. For current ad-
vertised speciﬁcations, refer to the speciﬁcation sheet available from the Marketing Department. Speciﬁcations are
subject to change without notice.
GENERAL
Frequency Range
Frequency Control
Channel Spacing
Mode of Operation
Operating Voltage
Regulated Supply Voltages
Transmit Enable
Receive Current
Transceiver Enable
Power and Data Connector
RF Input/Output
Operating Temperature
Storage Temperature
Humidity
Maximum Dimensions
FCC Compliance
DM3492
RECEIVER
Bandwidth
Frequency Stability
Sensitivity— l2 dB Sl'NAD
RF Input Impedance
Selectivity
Spurious and Image Rejection
Conducted Spurious Emissions
Intermodulation
FM Hum and Noise
Receive Attack Time
Total Receive On Time
Audio
Distortion
Response
Output Bias
Buffered Impedance
Buffered Audio Level
RSSI
928-960 MHz
Synthesized
12.5/25 kHz with 6125 kHz Channel steps
Simplex or Half Duplex
+13.3V DC nominal (IO-16V DC operational)
+5V DC 15%
3-16V DC at 400 uA max
70 mA maximum
3<16V DC at less than 400 uA
14-pin in-line socket (Dupont 76308-14)
SMA Jack (female)
-30°C to +60°C (-22°F to +140“F)
-40°C to +85°C (40°F to +185“F)
95% maximum RH at 40°C, non-condensing
4.585" L, 3.25" W, 2.2"1-1
Parts 90, 94, 15
Customer must apply
32MHz
1145 PPM from -30°C to +60“C (—22°F to +l40°F)
S 0.35 LIV, -116 dBm psophornetrically weighted
50 ohms
65 dBZS kHL,60dB 12.5kHz
70 dB
< -57 dBm
70 dB
—40 dB, 25 kHz channels, -35 dB, 12.5 kHz channels
< 5 ms
7 ms maximum
< 3% psophometrically weighted
ﬁll—3 dB 0 to 2.5 kHz for 12.5 kHz Channel, 0 to 5 kHz for 25 kHz Channel
2.5V DC 10.5V DC
>10k ohms
150 mV 150 mV
0.7V to 2.0V DC output from -120 to -60 dBm
,4_______._——-———-——
June 1997
Part No. 001-3492-001
th LKAL INFORMATION
RANSMITTER
requency Stability ills PPM from «30°C to +60°C (-22°F to +140°F) A
¢andwidth 32 MHz
laximum System Deviation 5 kHz (25 kHz Channel), 245 kHz (12.5 kHz Channel)
requency Spread 32 MHz
lodulation FM/DC coupled _
lideband Data Input Bias 2.5V DC 11 %
arrow Band Input AC coupled
lput Impedance >50k ohms -
udio Distortion < 3% at 3 kHz deviation. 1 kHz tone
(with user interface board narrow band data port
udio Response iZ dB, DC to 5 kHz dev with a I kHz tone Programmable to t dB using DAC
amass $1 dB across 32 MHz bandwidth
F Power Output l-SW 120% adjustable (SW at 13.3V DC nominal)
aviation Symmetry 5%
7 Output Impedance 50 ohms
Jty Cycle 50% (30 sec. max transmit)
ansmitter Adjacent Power -70 dB
termodulation Attenuation -40 dB
iuﬁous and Harmonic FM -20 dBm max.
4 Hum and Noise -40 dB 25 kI-IL -35 dB 125 kHz
»\
1997
V0, 001349200] 1—6
—_—__—_____________—___________
SECTION 2 INSTALLATION
2.1 HIE-INSTALLATION CHECKS
Field alignment should not be required before the
3492 is installed. However, it is still good practice to
check the performance to ensure that no damage
occurred during shipment. Performance tests are
located in Section 6.2.
2.2 INTERFACING WlTI-I DATA EQUIPMENT
2.2.1 DM3492 (RF Board)
Connector 1201 on the data transceiver PC board
provides the interface with the data equipment. This is
a l4-pin female connector with 025" square pins on
0.1" centers (Dupont 76308-1 14). The cable (Part No.
023-3472—007) is not included with ﬁle data trans-
ceiver. An interface cable diagram and pin designa—
tions are shown in Figure 2-l.
The following is a general description of the
input and output signals on Transceiver Interface con-
nector 120] .
Pin 1 (Ground) - Chassis pound.
Pin 2 (+13.BV DC) - Input, transceiver main power.
Input range 10-16V DC with $3 dB variation in output
power.
Pin 3 (Tx Eu) - Input +3-l6V DC. Enables transmit
circuitry. 5 0.3V DC in Rx mode.
Pin 4 (Rx En) - Input +3-16V DC. Enables receive cir-
cuitry. S 0.3 V DC in Tx mode.
Pin 5 (RF En) - Input +3-16V DC. Shuts down on—
board regulators. To be used as a power save mode.
Pin 6 (Mod In) - Provides a response of 12 dB from
DC to 5 kHz across the RF band (referenced to
1 kHz). It is programmable to 1 dB with the diagiostic
DAC. The modulation capability is 250 mV RMS
13 dB that produces is kHz deviation with a l kHz
tone. When this input is used, a temperature compen-
sated 2.5V DC bias is required as variations in voltage
cause the frequency to change. The transceiver regula-
tory compliance must be applied for with the customer
supplied modulation limiting/ﬁltercircuit and chassis.
Pin 7 (Synth Lock) - Output from synthesizer lock de-
tect circuit. bow (< 1V DC) = unlocked, high (>2.5V
DC) = locked.
Pin 8 (Synth En) - TTL input. Latch enable signal for
synthesizer. 250 ns min. for D, C and B words; 3 ms
min. for A0 word. A rising edge latches the data loaded
into the synthesizer IC..
Pin 9 (Data) - TTL input. Serial data line used for pro-
gramming the synthesizer and diagnostic functions.
Pin 10 (Synth Clock) - ‘ITL input. Clock signal for se—
rial data input on Pin 9. Data is valid on the rising edge.
1 MHz max. frequency.
Pin 11 (Ding En) - TTL input. Loads programmed
DAC values into DAC (U900) for modulation adjust
and power set. Also provides the strobe signal for shiﬁ
register (u901) for selecting Forward and Reverse pow-
er diagnostics. 250 ns min. activates on rising edge.
Pin 12 (R581) - Analog output (0.5-2V DC). The Re-
ceive Signal Strength Indicator output provides a volt-
age that increases in proportion to the strength of the
RF input signal.
Pin 13 (Denied) -- Analog output. The Receiver De-
mod output level is 150 mV RMS with a modulation
signal of 1 kHz at 6056 of maximum deviation. The out~
put is DC coupled and referenced to +2.5V DC. Load
impedance should be >10k ohms.
Pin 14 (Ding) - Analog Output This pin is enabled by
pin 1 1. When the Loader board is used it has the capa-
bility to test the operating environment through diag-
nostics. The diagnostic capabilities are in Section 1.2.2
June I997
Part No. 001-3492-001
____—_______________________—_——-——-————
NSTALLATION
PART NO. 023-3472-007
Figure 2-1 DM3492 MERFACE CABLE
: 1997
No. 001-3492-00] 2-2
SECTION 3 PROGRAMMING
3.1 INTRODUCTION
DM3492 - The information in Section 3.2
describes synthesizer programming protocol. This
information can be used as a basis for designing the
synthesizer programming hardware and soﬁware
required.
3.2 DM3492 SYNTHESIZER DATA PROTOCOL
3.2.1 GENERAL
The 928-960 MHz band is divided into two scg~
ments for the purp05e of reducing VCO gain. The
"LOW“ band covers the 928-944 MHz segment and
the "HIGH" band covers the 944-960 MHz segment.
The VCO band selection is accomplished by capaci-
tive pin-switching. The band switching is imple-
mented in both the transmit and receive modes. The
front—end ﬁlters and transmitter line—up cover the
entire 928‘960 MHZ band without adjustment.
Receive Bandwidth 928-960 Nﬂ-Iz
Transmit Bandwidth 928-960 MHz
First IF 87.850 MHz
Second [F 4500 kHz
First DO Injection 840.1 50-872.150 MI-Iz‘
Second L0 Injection 87.40 MHz“
TCXO Frequency 17.50 MHz
Resolution 6.25 kHz
Loop Comparison Freq. 50 kHz
‘ Low Side Injection
nu D11 an (m .
r-
man
A diagram of the 32 Bit Synthesizer Serial Data
Stream with deﬁnitions of the bits is shown in Figure
3—1.
Clock 1 MHz (max)
Synth Enable 250 ns (min) (for D, C and B words
approximately 3 ms for A0 word)
DOG-D23 D, C, B and A0 words
3.2.2 SYNTHESIZER DATA
In order to implement the band selection and
Tx/Rx frequency shift mentioned in Section 3.2.1, an
additional shiﬁ register was added to the synthesizer
section. Therefore, an additional 8 Bits of data are
added to each of the synthesizer load words (D/C/B/
A0) as shown in the serial data stream in Figure 3-1.
3.2.3 D-WORD CALCULATION (24 BITS)
The D-Word programs the Main, Reference and
Auxiliary dividers, and sets the modulus (refer to
Figures 3—2 and 3-6).
NR = 350 Ftcxo/SO kHz=350
where Ftcxo=l7.5 MHz
SM = 00 Reference select for main phase detector
EM = 1 Main divider enable ﬂag
SA = 00 Reference select for aux phase detector
EA = I Auxiliary divider enable flag
FMOD = | Selects modulus 8
IDNG = 0 Send all 4 words with A0
D Word = M1 0x5E 0x26
mm h—‘bh—
mm
mJ‘LﬂJ’lﬂJ’l—JULFLUUU'LI'UUUL
a. |‘|
Figure 3~1 32-811” SYNTHESIZER SERIAL DATA STREAM
June 1997
Part No. 001-3492-00]
ROGRAMMING
.2.4 C-WORD CALCULATION (24 BITS)
The C-Word enables the auxiliary prescaler, and
ets the auxiliary divide ratio for the secondary (Sec-
nd L0) loop (refer to Figures 3-4 and 3-7)
A = 0 Sets aux prescaler mode to + 4
[A = 437 (OxlBS) Auxiliary divide ratio
87.4 MHz + (4 x 437) = 50 kHz
‘-Word = 0x91 0x55 0x00
.2.S B-WORD CALCULATION (24 BITS)
The B-Word programs the Fractional-N charge
ump current setting factor The Binary acceleration
rotors (CL/CK) and prescaler type (modulus 3).
The value of CN should be interpolated for fre-
uencies between the band edgesi With these recom-
mended values of CN, the transceiver should have the
notional spurs minimized far below the levels needed
1 make 70 dB adjacent channel Rx or Tx speciﬁca-
ons.
The Charge Pump Current setting (CN) could be
Hinged on a channel-hy-channel basis for ultimate
ejection of the Fraction N spurious responses close
ito the cam'er frequency. the 3492 synthesizer has an
Ijust (R823) for the fractional compensation cur-
:nt. The factory preset value will allow CN to be set
, the following ranges:
lefer to Figures 3-3 and 3»7)
requency in a Band CN
owest Tx 1 10
ighest Tx I 15
owest Rx 100
ighest Rx 105
N = ‘ (Channel/Frequency dependent variable)
(110-115 TX) (100-105 Rx)
K = 0000 Binary acceleration factor for integral
charge pump
L = 00 Binary acceleration factor for
proportional charge pump
R = 10 Selects modulus 3 prescaler
-Word = 0x80 (8 bit CN) 0x02
ne 1997
in No. 001-3492~00I
3.2.6 AO-WORD CALCULATION (24 BITS)
The AO-Word is sent last (see Figure 3»5). The
AO-Word contains the data for the loop dividers and is
programmed on a channel-by-channel basis. The
Functional-N (NF) word is a 3 bit word that programs
the synthesizer to the fractional steps determined by
the fractional modulus selection flag (I = modulus 8)
and the loop comparison frequency (50 kHz). The fre-
quency resolution (i.e. step size) is then 50 kHz + 8 =
6425 kHz.
NF=* Fractional increment for modulus 8 (3 hits)
NM1=' Number of main divider cycles when
prescaler modulus equals 64 (12 bits)
NM2=' Number of main divider cycles when
prescaler modulus equals 65 (4 bits, PR=IO)
NM3=‘ Number of main divider cycles when
prescaler modulus equals 72 (4 bits, PR=10)
' Indicates frequency/channel dependent variable
EXAMPLE: To program an 1875 kHz channel:
NF=18.75 kHz-+625 kHz
NF=3
NMI, NM2 and NM3 are calculated as follows:
N=(NM1+2)x64+NM2x65+(NM3 +I)x72
Where:
N = Total division ratio
NMl = Number of main divider cycles when
prescaler modulus equals 64
NM2 = Number of main divider cycles when
prescaler modulus equals 65
NM3 = Number of main divider cycles when
prescaler modulus equals 72
Example:
Calculate NM], NM2 and NM3 to Rx 944.150 MHz
Rx L0 = 944.15 - 87.85 = 8563 MHZ (Synth Freq)
(87.85 MHz IF with Low Side Injection)
N = Rx L0+ FCM =856.3 +005 = 17126
(FCM = Loop Reference Frequency)
PROGRAMMING
NM: = (INT(64 x FRAC [N + 64])+ S) - 1 3.2.7 TX / Rx FREQUENCY SHIFT AND BAND
= (INT (64 x 0.59375) -.- 8) - l SELECTION
= (1'NT(38 + 8)) - 1
= 4 - I As mentioned in 3.2.2, in order to implement the
= 3 band selection xnd Rx/Rx an additional 8 bits of data
are added to each of the synthesizer load words (D/C/
B/AO) (see Figure 3-1). The frequency bands and
NM2 = 8 x FRAC [N + s] Transmit/Receive Bits are deﬁned as follows:
= 8 x 0.75
= 6 Low Band 928~944 MI-lz
High Band >944 MHz to 960 MHz
NM] = INTEGER [N + 64] - NM2 - NM3 - 3 xx Don’t care
= 267 . 6 ~ 3 . 3 Low+ Low Band Select ( l=lowband, 0=highband)
= 255 Low- Low Band Select (0=lowband, l=highband)
Tx+ Tmnsmit Select (1=Tx mode, O=Rx mode)
Tx— Transmit Select (0=Tx mode, l=Rx mode)
BlTS l I! S 4 5 6 " S “ H1 11 12 13 14 15 16 I7 IX 19 20 21 22 13 24
l (l 1 0 47 l) 0 El l 0 l l) 1 1 I 0 0 0 l (l 0 1 W1 0
W g—z——/ La ‘—v-’
ADDRESS NR1REFERENCF pimps) J
z 350 FOR 30 kHz REPEKENCE
SM lALWAYS 00)
EM (ALWAYS ll
SA (ALWAYS (I)!
EA (ALWAYS 17
FMOD (l - MODULUS x;
LONG ¢l)=24 BIT WORD)
Figure 3-2 D—WORD
June 1997
3-3 _ Part No. 001-3492-001
IDGRAMMING
/‘\
ans: 1 3 4 5 6 f a wmu1213141515171519202122231.»
l\(7<))(l(b0(l|0|(lllIUUODUOOUV
ADDRESS NAijUXILIARV mvms RAT‘O]
= FORSukHlREFERENCF
PA (ALWAYS U) (ALWAVS m _
FigureS-S C-WORD
51751234 5 s - a 9mulzlsuumrmlozoznzzzlu
X 0 0 (I 0 U U 0 Oil “ll 0” 0” U“ "(I (1/1 W] H (7 0 I) (i U 1 0
ADDRESS Nm‘USED CN CK cu,
(ALWAYS (mm (CHARGE PUMP CURRENT smmm BINARY ACCELERATION
“MW“ ”KNOW—r) FACTOR (ALWAYS mm» A
m (PRESCALER TYPE) uo=M0DULus 3h
Figure3~4 nwom;
BITSI Z \ ‘ 5 6 Y I 7 IO M I2 I3 I‘ I5 In I7 II 19 m 2! 11 13 14
nmmln/lwlwlunMmmmmmmmmnumnnmmwlwlwl
ABDlBS ‘—V_‘ ‘ ""V—‘—‘ —f_’
NF um um
(NWBEROFMMNDwmncYcLEs mﬂwmunmwnﬂcvcm
mnmﬂcuﬂmmwwsxuy wmvmmuwuws-as;
Figure3-5 AO-WORD
ﬁx
19 [997
1 No. 001-3492—00! 3-4
____,_____,___________—.____——-——-———-—-————————-
PROGRAMMING
| 14
A0
m “1:qu
8“
C_
E “IE
I 24
\_,_a w
ADDRESSBITS TESTBTI'S
NO’IE: E-Wmd no! and in Symhesizer load
Figure3—6 SERIALINP'UTWORD FORMAT
nunnnuuz mmmmmmmwuulxuunnﬂ
n.
mum mum
n...
17-i-
Figllrc 3-7 DIAGNOSTIC SERIAL DATA STREAM
June 1997
3-5 ‘ Part No. 001-3492-00]
KOGRAMMING
..8 RADIO DIAGNOSTICS
The diagnostic features allow the user to program
)igital-To—Analog Convener (DAC) to adjust RF
put power and modulation flatness without remov-
; the radio from the enclosure. Bit "a0" can be set
provide an analog voltage representative of the for-
rd and reverse RF power at the radio interface con-
:tor JZOI, pin 14. This feature can be used to moni-
the condition of the transceiver and antenna/
dline. Figure 3-7 is a diagram of the Diagnostic
“ial Data Stream with deﬁnitions of the bits. It is 19
; long, the front (MSBs) can be padded with “Don’t
res" (XXs) to get to 24 bits.
wk 1 MHZ (max)
lg Enable 250 ns (min)
' Don’t Care
tC Bits
-A0 = DAC Output Select
=Power Set Data=0x00 to OxFF, RNG=1
=Mod Adj Data=0x00 to Oxl-‘F, RNG=1
=DAC Control Select Data=0x00 to OxFF, RNG=1
G = Range Select (max output) (Ref=5.SV+2)
1 x Ref
2 x Ref
-D0 = D/A Data
>0= 0.0V
7F = l x Ref (RNG=0)
'F = 2 x Ref(RNG=l)
ﬂ Register Bits:
= Diagnostic Select to 120], pin 14 (Analog Voltage)
Forward Power
Reverse Power
RECEIVE T0 TRANSMIT SEQUENCE
Synthesizer is loaded (D, C, B and A0 words).
Refer to Figure 3-8.
The state of the RX_EN line does not have to be
:hanged until the last bit is sent. However, Recieve
will cease as soon as it is changed.
e 1997
. No. 00I-3492-001
3—6
3. The SYNTH ENABLE line should be held l-HGH
for 2 to 3 milliseconds after the last word is sent.
This puts the frequency synthesizer in a SPEEDUP
MODE and slightly improves lock times then the
Synth Enable should be returned to a low state.
4. Aﬁer the last word is strobed in, 7 milliseconds
(worst case) should elapse before TX_F.N is turned
ON. This allows the synthesizer to come within
1 kHz of the desired frequency.
Figure 3—8 RX TO TX TIMING DIAGRAM
"Ramp-Up" is the amount of time required for
the transmitter to reach full power once the TX EN
has been applied. The Ramp—Up circuitry (located on
the transceiver) minimizes adjacent channel interfer-
ence caused by spectral spreading (sinx/x) when the
transmitter is keyed. The Ramp-Up time is approxi-
mately 3 ms.
3.4 TRANSMIT TO RECEIVE SEQUENCE
1. TX_EN is turned OFF. This signal is shaped.
Refer to Figure 3-9.
2. The synthesizer load process could begin slightly
before, but when the last bit is strobed in the synthe-
sizer it will become unlocked.
3. The RX_EN line should switch from low to high
AFTER the TX_EN is switched. The RX_EN not
only tums the RX circuits on but also Pin Shiﬁs the
VCO.
PROGRAMMING
4. For quickest lock times the SYNTl-l ENABLE line
on the last load word should be held high for 2 to 3
milliseconds. lt MUST NOT be Ieﬁ high as the syn-
thesizer in the SPEEDUP mode has poor noise pep
fonnnnce and would degrade the Receive
performance.
mm
Figure 3-9 TX T0 RX TINHNG DIAGRAM
Speedup is 2 to 3 ms
Lock is approximately 7 ms
Ramp is approximately 3 ms
Dekey is approximately 3 ms
"Ramp-Down" is the amount of time required for
the transmitter output power to be reduced before
switching off the transmitter and enabling the receiver
with the RX EN‘ The Ramp-Down circuitry (located
on the transceiver) minimizes adjacent channel inter-
ference caused by spectral spreading (sinx/x) when the
transmitter un tin-keyed. The Ramp-Down time is
approximately 3 ms.
June I997
3-7 Part No. 001-3492-001
_—________________________._____._____._.——-—-—-—-——
ROGRAMMLNG
This page intentionally Ieﬁ blank.
1a [997
H No. 001-3492—001 3-8
SECTION 4 CIRCUIT DESCRIPTION
4.1 GENERAL
4.1.1 INTRODUCTION
The main subassemblies of this transceiver are
the RF board, VCO board, TCXO, Loader board or
Modem. A block diagram of the transceiver is located
in Figure 4-1. The 3492 is also available in Transmit
only and Receive only models.
The 3492 has a reference oscillator stability of
$1.5 PPM. The 17.5 MHz TCXO (Temperature Com-
pensawd Crystal Oscillator) is soldered directly to the
RF board. The TCXO is not serviceable.
4.1.2 SYNTHESIZER
The VCO (voltage-controlled oscillator) output
signal is the receiver ﬁrst injection frequency in the
Receive mode and the transmit frequency in the
Trans-nit mode. The ﬁrst injection frequency is
87.35 MHz below the receive frequency The tie-
quency of this oscillator is controlled by a DC voltage
produced by the phase detector in synthesizer chip
U800.
Channels are selected by programming counters
in USCG to divide by a certain number. This program-
ming is performed over a serial bus formed by the
Synth Clock, Synth Enable, and Data pins of 1201.
This programming is performed by the Loader board,
modem or user supplied hardware and software (see
Section 3).
The frequency stability of the synthesizer in both
the receive and transmit modes is established by the
stability of the TCXO. The TCXO is stable over a
temperature range of -30° to +60‘7 C (-22° to +I40" F).
4—1
4.1.3 RECEIVER
The receiver is a double-conversion type with
intermediate frequencies of 87.85 MHz / 450 kHz.
Bandpass ﬁlters reject the image, half IF, injection,
and other unwanted frequencies. A four-pole crystal
ﬁlter enhances receiver selectivity.
4.1.4 TRANSMITTER
The transmitter produces a nominal RF power
output of SW at 13.3V DC, adjustable down to lW.
Frequency modulan’on ofthc transmit signal occurs in
the synthesizer. Transmit audio processing circuitry is
contained in the Loader board, modem or customer-
supplied equipment
4.2 SYNTHESIZER
Programming of the synthesizer provides the data
necessary for the internal prescaler and counters. One
input signal is the reference frequency. This frequency
is produced by the 17.5 MHz reference oscillator
(T CXO). The other input signal is the VCO
frequency.
A block diagram of the synthesizer is shown in
Figure 4-1 and a block diagram of Synthesizer IC
U800 is shown in Figure 4—2. As stated previously,
the synthesizer output signal is produced by a VCO
(volmge controlled oscillator). The VCO frequency
is controlled by a DC voltage produced by the phase
detector in U800. The phase detector senses the phase
and ﬁ'equency of the two input signals and causes the
VCO control voltage to increase or decrease if they
are not the same. The VCO is then "locked" on
frequency.
June 1997
PM No. Dbl-34924101
[RCUIT DESCRIP'HON
TRANSMITTER
F igure 4-1 TRANSCEIVER BLOCK DIAGRAM
is 1997
1 No, 001-3492-001 4-2
4.2.I VOLTAGE-CONTROLLED OSCILLATOR
Oscillator
The VCO is formed by 0820, several capacitors
and varactor diodes, and ceramic resonator L826‘ lt
oscillates at the transmit frequency in transmit mode
and first injection frequency in the receive mode (928-
960 MHz in transmit and 840.150-872.150 MHz in
receive).
Biasing of 0820 is provided by R823, R824 and
R826. An AC Voltage divider formed by C844 and
C845 initiates and maintains oscillation and also
matches 0820 to the tank circuit. Resonator L826 is
grounded at one end to provide shunt inductance to
the tank circuit.
ErequencyﬁnntmLandMadulation
The VCO frequency is controlled by a DC volt—
age across varactor diode CR824. As voltage across a
reverse-biased varactor diode increases, its capaci—
tance decreases. The VCO ﬁ'equency increases as the
control voltage increases. The control line is isolated
from tank circuit RF by choke L825. The amount of
frequency change produced by CR824 is controlled by
series capacitor C83 6.
The VCO frequency is modulated with the trans-
mit audio/data signal from 1201, pin 6 is applied
across varactor diode CR822 which varies the VCO
frequency at an audio rate. Series capacitors C825/
C824 couple the VCO to CRSZZ. R821 provides a
DC ground on the anodes of CR822/CR823, and isola—
tion is provided by R820 and C826. C827 is an RF
bypass.
The DC voltage across CR823 provides compen-
sation to keep modulation relatively ﬂat over the
entire bandwidth of the VCO. This compensation is
required because modulation tends to increase as the
VCO frequency gets higher (capacitance of CR824/
CR825/CR826/CR827 gets lower). CR823 also bal-
ances the modulation signals applied to the VCO and
TCXO. The DAC can be used to adjust the VCO
modulation sensitivity.
CIRCUIT DESCRIPTION
The DC voltage applied across CR823 comes
from the modulation adjust control R818 on the RF
board. R820 applies a DC biasing voltage to CR822;
C815 provides DC blocking. RF isolation is provided
by C827, R822 and R817.
4.2.2 VCO AND REFERENCE OSCILLATOR
MODULATION
Both the VCO and reference oscillator (TCXO)
are modulated in order to achieve a ﬂat frequency
response If only the VCO were modulated, the phase
detector in U800 would sense the frequency change
and increase or decrease the VCO control voltage to
counteract the change (especially at the lower audio
frequencies). If only the reference oscillator fre-
quency is modulated, the VCO frequency would not
change fast enough (especially at the higher audio ﬁ'e—
quencies). Modulating both VCO and reference oscil-
lators produces a ﬂat audio response. Potentiometer-
R818 sets the VCO modulation sensitivity so that it is
equal to the reference oscillator modulation
sensitivity.
4.2.3 CASCADE AMPLIFIERS
The output signal on the collector onBZO is cou-
pled by 0846 to buffer ampliﬁer Q821/Q822. This is
a cascade ampliﬁer which provides ampliﬁcation and
also isolation between the VCO and the stages which
follow. The signal is capacitively coupled from the
collector of Q822 to the base of Q821. The resistors
in this circuit provide biasing and stabilization, and
C852 and C854 are RF bypass capacitors.
4.2.4 AMPLIFIER
Ampliﬁer 0823 provides ampliﬁcation and isola~
tion between the VCO, Receiver and Transmitter.
C85] provides matching between the ampliﬁers.
Bias for Q823 is provided by R840, R842 and R843.
Inductor L833 and capacitor C860 provide impedance
matching on the output.
4.2.5 VOLTAGE FILTER
Q845 on the RF board is a capacitance multiplier
to provide ﬁltering of the +9.6V supply to the VCO.
R845 provides transistor bias and C842 provides the
June 1997
. Part No. OBI-3492430]
__————————-————————-——————————-——-————’
[RCUIT DESCRIPTION
pacitance that is multiplied. lfa noise pulse or other
yltage change appears on the collector, the base volt-
;e does not change signiﬁcantly because of C842.
terefore, base current does not change and transistor
lrrem remains constant. CR840 decreases the charge
nc of C842 when power is tumed out This shortens
e start-up time ofthe VCO. C840 and C84] are RF
coupling capacitors.
2.6 VCO FREQUENCY SHIFT
The VCO must be capable of producing frequen-
es from 840-960 MHz to produce the required
ceive injection and transmit frequencies. If this
rge of a shiﬁ was achieved by varying the VCO con-
)! voltage, the VCO gain would be undesirably high.
terefore, capacitance is switched in and out of the
nk circuit to provide a coarse shiﬁ in frequency.
CLOCK
DATA
sman
ii ail; s
REF
12
REFERENCE Drvrm
SA
SECONDARY
REFERENCE
AUX
H seam. mm . PROGRAM LATCMFJ
l I PRESCALEl
FIACI'IDNAL
Accuwurc > ”WW-“s
The 928-960 MHz band is divided into two seg-
ments, 928-944 MHz and 944-960 MHz. The band
selection is controlled by shiﬁ register U840, digital
transistors 0843/0844 and pin diode CR820 on the
VCO board.
A frequency shift of 87.85 MHz is required to go
from transmit to receive mode and visa versa. Trans-
mit to receive frequency shiﬂ is accomplished by pro-
gramming shift register U840 which drives the digital
transistors 0841/0842. [n Transmit mode, 0841/
0842 forward bias pin diode CR821 which switches
in an inductive transmission line in parallel with the
VCO resonator causing the VCO frequency to
increase. In Receive mode 0841/0842 reverse bias
CR821 which switches out the inductive transmission
line and lowers the VCO frequency for the mixer
injection.
_ VDD
CONTIOL
é'ﬁ
RA
LOCK
VDDA Vssa
Figure 4-2 [1800 SYNTEESIZER BLOCK DIAGRAM
ne 1997
11 No. 001449200!
4.2.7 SYNTHESIZER INTEGRATED CIRCUIT
(U800)
Introduction
Synthesizer chip USOO is shown in Figure 4-2.
This device contains the following circuits: R (refer-
ence), Fractional-N, NM], NM2 and NM3; phase and
lock detectors, prescaler and counter programming
circuitry. The basic operation was described in Sec-
tion 4.2.1.
ChanneLEmgramming
Frequencies are selected by programming the IL
Fractional-N, NMI, NM2 and NM] in UBOO to divide
by a certain number. These counters are programmed
by Loader board or a user supplied programming cir-
cuit. More information on programming is located in
Section 3.
As previously stated, the counter divide numbers
are chosen so that when the VCO is oscillating on the
correct frequency, the VCO-derived input to the phase
detector is the same frequency as the reference oscilla-
tor—derived frequency.
The VCO frequency is divided by the internal
prescaler and the main divider to produce the input to
the phase detector.
4.2.8 LOCK DETECT
When the synthesizer is locked on frequency, the
SYNTH LOCK output of U800, pin 18 (1201, pin 7) is
JV. When the synthesizer is unlocked, the output is a
less than IV. Lock is deﬁned as a phase diﬁerenoe of
less than I cycle of the TCXO.
4.3 RECEIVER CIRCUIT DESCRIPTION
4.3.1 CERAMIC FILTER, RF AMPLIFIER
Capacitor C200 couples the receive signal from
the antenna switch to ceramic ﬁlter 2200. (The
antenna switch is described in Section 4.4.3.) Z200 is
a bandpass ﬁlter that passes only a narrow band of fre-
quencies to the receiver. This attenuates the image
and other unwanted frequencies.
4-5
CIRCUIT DESCRIPTION
Impedance matching between the Z200 and RF
ampliﬁer 0201 is provided by C201, C203 and L200.
CR200 protects the base-emitter junction of 0201
from excessive negative voltages that may occur dur-
ing high signal conditions. 0200 is a switched con-
stant cunent source which provides a base bias for
0201. 0200 base bias is provided by R200/R201.
Current ﬂows through R202 so that the voltage across
it equals the voltage across R200 (minus the base/
emitter drop of 0200). In the transmit mode the
receive 49.6V is removed and 0200 is off. This
removes the bias from 0201 and disables the RF
ampliﬁer in transmit mode. This prevents noise and
RF from being ampliﬁed by 0201 and fed back on the
ﬁrst injection line.
Addin’onal ﬁltering of the receive signal is pro-
vided by 7201. L201 and C206 provide impedance
matching between 0201 and Z201. Resistor R205 is
used to lower the 0 of L201 to make it less frequency
selective.
4.3.2 MIXER
First mixer 021 1 mixes the receive frequency
with the ﬁrst injection frequency to produce the
87.85 NH-Iz ﬁrst IF. Since low-side injection is used,
the injection frequency is 87.85 MHz below the
receive frequency. The RF signal is coupled to the
mixer through C211. L212 and C214 tune the mixer
output to 87.85. R214 lowers the Q of L212.
4.3.3 FIRST LO AIvﬂ’LIFIER
The ﬁrst injection frequency from the VCO is
coupled to the First Local Oscillator (LO) ampliﬁer
0260/0261 through C266. L261/C265 match 0260
to the VCO.
0261 is a switched constant current source which
provides a base bias for 0260. 0261 base bias is pro-
vided by R264/R265. Current ﬂows through R263 so
that the voltage across it equals the voltage across
R264 (minus the base/emitter drop of 0261). In the
msrnit mode the receive +9.6V is removed and
0261 is off. This removes the bias from 0260 and
disables the First L0 ampliﬁer in transmit mode.
June 1997
' Part No. 001-3492-001
IIRCU lT DESCRIPTION
3.4 CRYSTAL FILTER, FIRST IF SECTION
Z220 and 2221 form a 2-section, 4-pole crystal
ilter with a center frequency of 87.85 MHz and a
3 dB passband ofs kHz(lZ.5 kHzBW) or 15 kHz
25 kHz BW). This ﬁlter establishes the receiver
electivity by attenuating the adjacent channel and
ther siylals close to the receive frequency. C223,
3224, and L221 adjust the coupling ofthe ﬁlter.
222, C226, C227 and R223 provide impedance
"latching between the ﬁlter and U230.
3.5 SECOND LO/MlXER/DETECTOR
lscillator and Mixer
As shown in Figure 4-3, U230 contains the sec-
nd oscillator, second mixer, limiter, detector, and
quelch circuitry. The control line from synthesizer
1800 is on U230, pin 4. R250/C252/CR240 stabilize
ie base current of the oscillator control line. C243/
3245 provide the feedback for the Colpitts oscillator.
he 87.4 MHz output of the oscillator is on U230, pin
and is coupled to buffer Q240. Bins for 0240 is pro-
ided by R242/R243/R245. The output of 0240 is
oupled to the auxiliary input of U800, pin 10 to main-
iin the control line. The 87.85 MHz IF signal is
nixed with the 87.4 MHz second L0 to produce the
50 kHz Second lF.
Mixsaou-r
ISM}
lrmrln
mmut rum
‘ lrmrmrr
mum we
mm m
uulunlrrvirr W hm
mum as:
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Figure 4—3 11230 BLOCK DIAGRAM
me 1997
it! No. 00l-3492-001
Second IF Filter
The output of the internal double-balanced mixer
is the difference between 87.85 MHz and 87.4 MHz
which is 450 kHz. This 450 kHz signal is fed out on
pin 20 and applied to second IF ﬁlters 2230 and 2231.
These ﬁlters have passbands of 9 kHz (12.5 kHz BW),
or 20 kHz (25 kHz BW) at the -6 dB points and are
used to attenuate wideband noise.
Limiter-Ampliﬁer
The output of 2230/Z231 is applied to a limiter-
ampliﬁer circuit in U230. This circuit ampliﬁes the
450 kHz signal and any noise present; then limits this
signal to a speciﬁc value. When the 450 kHz signal
level is high, noise pulses tend to get clipped off by
the limiter; however, when the 450 kHz signal level is
low, the noise passes through the limiter. C233/C234
decouple the 450 kHz signal.
Quadrature Detector
From the limiter stage the signal is fed to the
quadrature detector. An external phase-shift network ‘\
connected to U230, pin 10 shifts the phase of one of
the detector inputs 90° at 450 kHz (all other inputs are
unshiﬁed in phase). When modulation occurs, the fre-
quency of the IF signal changes at an audio rate as
does the phase of the shiﬁed input. The detector,
which has no output with a 90° phase shiﬁ, converts
this phase shiﬁ into an audio signal. L230 is tuned to
provide maximum undistorted output from the detec-
tor. R232 is used to lower the Q of L230. From the
detector the audio and data signal is fed out on pin 8.
The audio/data output of U230, pin 8 is applied to
1201, pin 13.
. I: Hi
The audio/data output of U230, pin 8 is applied
to J201, pin 13.
Receive Si alStren Indicator RSSI
U230, pin 5 is an output for the RSS] circuit
which provides a voltage proportional to the strength
of the 450 kHz IF signal. The RSSI voltage is applied
to J201, pin 12.
4.4 TRANSMITTER CIRCUIT DESCRH’I'ION
4.4.1 DRIVER
The VCO RF output signal is applied to R846,
R847 and R848 that form a resistive splitter for the
receive ﬁrst local oscillator and the transmitter. The
VCO signal is then applied to a 50 ohm pad formed by
R500, R501, and R502. This pad provides attenuation
and isolation. 0500 provides ampliﬁcation and addi-
tional isolation between the VCO and transmitter.
Biasing for this stage is provided by R503 and R504,
and decoupling of RF signals is provided by C504.
Impedance matching to the power ampliﬁer is pro-
vided by L500/C505.
4.4.2 FfNAL, COMPARATOR
RF module U510 has an RF output of 1 to SW
and operates on an input voltage from 10- 16V.
Power control is provided by U520, U130, 0520
and a stripline directional coupler. The power is
adjusted by Power Set Control ofU900 that provides a
reference voltage to UIBOC. U130C drives 0520 and
PA module U510 when using the DAC. When not
using the DAC, the set voltage is applied through
U902, pin 2.
One end of the stripline directional coupler is
connected to a forward RF peak detector formed by
R535, CR530, C531 and U520A. The other end ofthe
stripline directional coupler is connected to a reverse
RF peak detector formed by R537, CR53 l, C534 and
USZOB.
If the power output of U5 1 0 decreases due to
temperature variations, etc., the forward peak detector
voltage drops. This detector voltage drop is buffered
by U520A and applied to inverting ampliﬁer U130C
which increases the forward bias on 0520. The
increase on 0520 increases the power output level of
U510. lf the power output ofUS 10 increases, the for-
ward peak detector voltage increases and U l 30C
decreases the fonavard bias on 0520. The decrease on
0520 decreases the output power of U510.
The output ofCR530 and CR53] are fed to
USZOAIB respectively. If the output of either buffer
increases, the increase is applied to the inverting input
ofU130C. The output ofUlflOC then deems and
4-7
CIRCUIT DESCRIPTION
0520 decreases the input voltage to U510 to lower the
power. The control voltage is isolated from RF by fer-
rite bead EPSlO and C51 1 decouples RF.
The forward/reverse power voltages ﬁ'om
U520A/B are also applied to U901 for Diagnostic out-
puts on 1201, pin 14.
The low-pass ﬁlter consists of C541, L540,
C542, L541, C543, L542 and C544. The ﬁlter attenu-
ates spurious frequencies occurring above the transmit
frequency band. The transmit signal is then fed
through the antenna switch to antenna jack J501.
4.4.3 ANTENNA SWITCH
The antenna switching circuit switches the
antenna to the receiver in the receive mode and the
transmitter in the transmit mode. In the transmit
mode, +9V is applied to L543 and current ﬂows
through diode CR540, L544, diode CR541, and
R540. When a diode is forward biased, it presents a
low impedance to the RF signal; conversely, when it is
reverse biased (or not conducting), it presents a high
impedance (small capacitance). Therefore, when
CR540 is forward biased, the transmit signal has a
low-impedance path to the antenna through coupling
capacitor C546.
L544 and C552 form a discrete quaner- wave
line. When CR541 is forward biased, this quarter-
wave line is effectively AC grounded on one end by
C552. When a quarter-wave line is grounded on one
end, the other end presents a high impedance to the
quarter-wave frequency. This blocks the transmit sig-
nal from the receiver. C545/CS46 matches the
antenna to 50 ohms in transmit and receive.
4.4.4 TRANSMIT KEY-UP CONTROL
When 3~16V is applied to 1201, pin 3 (1X_EN)
is applied to the base of 0133 it tums the transistor on
and causes the collector to go low. This low is on the
base of 0134 and tums the transistor on to apply
+5.5V to U130A, pin 2. C130 and C131dccouple RF.
The +5.5V from 0134 is divided by R132/R133 to
produce a +3.6V reference on U130A, pin 3. C136,
C137, C138 and C139 provide RF decoupling.
June 1997
Part No. 001-3492-001
TRCUIT DESCRIPTION
Q130, 0131 and Q132 act as switches that turn
1 with the RX_EN line. When 1201. pin 4 goes low,
1130 is turned on“, which turns on 0131 that turns on
1132. This applies +13.3V to U130 before the
XiEN line on 1201, pin 3 goes high.
U130B provides the key-up/key-down condition-
1g circuit. C141/R137 provide a ramp up/mmp down
Fthe +9V TX during key-up/key-down which
zduces load pull of the VCO during key-up.
The output on U130B, pin 7 is applied to the non-
tverting input ofcomparator U130D, pin 12. The
rtput ofU130D, pin 14 is applied to the base ofctrr—
ent source 0135. The output onI 35 is on the emit-
r and is applied back to the inverting input ofcom-
traitor U130D, pin 13. A decrease or increase at
130D, pin 13 causes a correction by U130D to stabi-
ze the +9V transmit output. R140/‘R141 establishes
e reference voltage on UIBOD, pin 13. C144 pro-
des RF bypass, C143 provides RF decoupling and
145 stabilizes the output. The +9V transmit voltage
then distributed to the circuits
ne 1997
n No. 001-3492-001
7—________________________.____.___———-—-—
4-8
4.5 VOLTAGE REGULATORS
4.5.1 +96 AND +5.5V REGULATED
The +3-16V applied on 1201, pin 5 is applied to
the base on110 turning the msistor on. This
causes the collector to go low and applies a low to the
control line of U1 10, pin 2 and R110 provides supply
voltage isolation. The +13.3V from J201, pin 2 is on
U1 10, pin 6 to produce a +5.5V reference output on
U1 10, pin 4. C110 stabilizes the voltage and C114/
C111 provide RF decoupling. C117 provides RF
bypass and C123 provides RF decoupling. C119
helps to stabilize the voltage when the +5.5V supply
ﬁrst turned on.
The low from the collector onl 10 is also
applied to the control line ofUl 1 1, pin 2. The +13.3V
from 1201, pin 2 is on U1 1 1, pin 6 to produce a+9.6V
output on Ulll, pin 4. C118 provides RF bypass and
C122 provides RF decoupling. C 120 helps to stabilize
the voltage when the +9.6V supply ﬁrst tun-red on.
SECTION 5 SERVICING
5.1 GENERAL
5.1.1 PERIODIC CHECKS
This transceiver should be put on a regular main-
tenance schedule and an accurate performance record
maintained. important checks are receiver sensitivity
and transmitter frequency, modulation, and power out-
put. A procedure for these and other tests is located in
Section 6. It is recommended that transceiver perfor-
mance be checked annually even though periodic
checks are not required by the FCC. During the ﬁrst
year, make an additional check or two to ensure no
TCXO frequency drifting has occurred.
5.l .2 SURFACE-MOUNTED COMPONENTS
A large number of the components used on the
transceiver board are the surface-mounwd type. Since
these components are relatively small in size and are
soldered directly to the PC board, care must be used
when they are replaced to prevent damage to the com-
ponent or PC board. Surface-mounted components
should not be reused because they may be damaged by
the unsoldering process.
5.l.3 SCHEMATIC DIAGRAMS AND COlvﬂ’O-
NENT LAYOUTS
Schematic diagrams and component layouts of
the PC boards used in this transceiver are located in
Section 8. A component locator guide is also pro-
vided to aid in component location.
5.1 .4 REPLACEMENT PARTS LIST
A replacement parts list with all the parts used in
this transceiver is located in Section 7. Parts are listed
alphanumerically according to designator. For infor-
mation on ordering pans, refer to Section 1.8.
5.1.5 TCXO MODULE NOT SERVICEABLE
The 11.5 PPM TCXO module is not ﬁeld ser-
viceable. Part changes require a factory recalibran'on
to ensure that the oscillator stays within its 1:15 PPM
tolerance.
5.2 SYNTHESIZER SERVICING
5.2.1 INTRODUCTION
When there is a synthesizer malfunction, the
VCO is not locked on frequency. When an unlocked
VCO is detected by the lock detector circuit, USOO,
pin 18 goes low (OV).
NOTE: The user-supplied circuitry must disable the
Irmmilter and receiver when an uul-of—Iack condi-
tion is indicated.
When the VCO is unlocked, the fR and fV inputs
to the phase detector are usually not in phase (see Sec-
tion 4.1.2). The phase detector in U800 then causes
the VCO control voltage to go to the high or low end
of its operating range. This in turn causes the VCO to
oscillate at the high or low end of its frequency range.
As shown in Figure 4-1, a loop is formed by
VCO 0820, ampliﬁer Q82 1/0822, and the RF l'N of
U800. Therefore, if any ofthese components begin to
malfunction, improper signals appear throughout the
loop. However, correct operation of the counters can
still be veriﬁed by measuring the input and output fre—
quencies to check the divide number.
Proceed as follows to check the synthesizer l/O
signals to determine if it is operating properly.
5.2.2 REFERENCE OSCILLATOR
Check the signal at U800, pin 8. It should be
17.5 MHz at a level of approximately 0.5V P-P. If the
TCXO module is defective, it is not serviceable and
must be replaced with a new module as described in
Section 5.1.5.
5.2.3 VCO
Output Level
Tlle output level of 0823 can be measured with
an RF voltmeter or some other type of high impedance
meter. The minimum level after a power splitter at
R846 should be ‘3 dBm.
June 1997
Part No. 001-3492-001
ERVICING
nutmlloltage
Check the DC voltage at C815 with a channel
ear the center of the band. If the VCO is locked on
equency, this should be a steady DC vohage near
V. If it is not locked on frequency, it should be near
|e lower or upper end ofits range (UV or 5.5V).
mainline-lax
Check the VCO frequency at R841. If the VCO
locked on frequency, it should be stable on the
ansmit channel frequency. If the VCO is not locked
n frequency, the VCO control voltage is probably
ear 0V or 5.5V
24 SYNTHESIZER (USOO)
ock Detector
When the VCO is locked on frequency, the lock
etect output on J201, pin 7 should be high.
3 RECEIVER SERVICING
To isolate a receiver problem to a speciﬁc sec-
on, refer to die troubleshooting ﬂowchart in Figure
-1. Tests referenced in the ﬂowchart are described in
ie following information.
UTE: Supply voltages are provided by the risen
3.1 SUPPLY VOLTAGES AND CURRENT
Measure the supply voltages on the following
us at interface connector J201:
?in 4 - 3-16V DC Receive
’in 5 - 3-16V DC
Place a DC ammeter in the supply line to the
ansceiver and the following maximum currents
rould be measured:
’in 4 - 400 MA
)in 5 - 400 uA
ne 1997
rrt N0. 001-34924701
5.3 .2 MIXER/DETECTOR
Data Output
Using a .01 pF coupling capacitor, inject a
8785 MHz, 1 mV signal, modulated with 1 kHz at
$3 kHz deviation (for 25 kHz radios) 11 .5 kHz (for
12.5 kHz radios) at U230, pin 1. The signal output at
U230, pin 8 should be approximately 150 mV P-P.
NOT E: This signal consists of the 1 kHz modulation
and harmonic: of 45 0 kHz.
RSSI Oumut
The RSSI output on 1201, pin 12 should be <900
mV DC with no signal applied, and >1.8V DC with a
1 mV input signal.
unsure CURRENT
AND VOﬂ'AGES
mm sen-nous;
yes
CHECK Mixenl
CHECK mm
ourru'r
km 1!) seem»! 5.3.6
Figure 5-1 RECEIVER SERVICING
5.3.3 SECOND LO
Verify that the Second LO signal is present at
R245. The Second LO should be at 87.40 MHZ and
not has than 250 mV P-P.
5.3.4 AUDIO BUFFER AMP
The Data output on 1201, pin 13 should be 100—
200 mV RMS, with the preceding injection signal. If
these levels are not correct, verify proper adjustment
of LBU (see Section 6.7). The gain of U230 is 2.8 for
25 kHz mdios and 5.8 for 12.5 kHz radios.
5.3.5 CRYSTAL FILTERS
The 87.85 MHz IF signal is provided to the crys-
tal ﬁlters Z220/Z221 .
5.3.6 MIXER
The mixer converts the RF signal (928-960 MHz)
to 87.85 MHz. The Local Oscillator is pmvided by
the VCO and 0260/0261. The level of the LO should
be approximately +3 dBm.
5.3.7 DOW NOISE AMPLIFIER (LNA)
The LNA provides approximately 12 dB of gain
at 928-960 MHz. 0200 provides active bias to Q201.
5.3.8 ANTENNA SWITCH
CR540‘ CR54I, L544, C551 and C552 form a
Pi-network antenna switch. CR540 and CR541 are
reversed biased in Receive Mode.
5.4 TRANSMITTER SERVICING
5.4.l SUPPLY VOLTAGES AND CURRENT
Measure the supply voltages on the following
pins of interface connector 1201:
Pin 2 - l3.3V DC nominal
Pin 3 - 3-16V DC
Pin 4 - 0.0V DC (while transmitting)
Pin 5 — 3-16V DC
Pin 6 - 2.5V DC il‘Vo/l.5V P—P max
SERVICING
Place a DC ammeter in the supply line to the
transceiver and the following maximum currents
should be measured:
Pin 2 - 2.5A maximum
Pin 3 - 400 uA
Pin 5 — 400 uA
5.4.2 VCO
1. Check VCO aﬁer power splitter for power output.
(Power output should be at least -3 dBm.)
2. Check 9V Transmit (Q1 35, emitter).
3. If9V is not present cheek Q133/Ql34, Ul30, Ql35,
Ql30, OB] and 0132 (see Section 4.4.4).
4. Check voltages on Driver 0500.
Input = 1.5V DC
Output = 3.5V DC
Power output should be at least 2 mW (+3 dBm) at
C506 (50 ohm point).
5.4.3 FINAL AMPLIFIER
1. Check the voltages on U510.
Pin 2 = 9V DC
Pin 3 = .0V DC (varies with power setting)
Pin 4 = 13.3V DC
Power output at C540 should be 7.5-8.0W (+381 to
+39 dBm).
5.4.4 ANTENNA SWITCH
l. Check the antenna switch voltages.
CR540 = 8.6V DC
CR54I = 8.0V DC
The loss through the Antenna Switch should be 1.9
to 2.1 dB.
llme 1997
Part No. 00] -3492-00I
ERVlClNG
4.5 MODULATION INPUT
Check for audio/data signals at 120] , pin 6, YSOO,
pin 1 and A840, pin 3.
4.6 TCXO
Check YSOO, pin I f0r2.5V DC il%.
Adjust Y800 to set the transmitter to the frequency
of operation.
‘ lfthe frequency cannot be set to the frequency of
operation, replace the TCXO.
Figure 5-2 TRANSMITTER SERVICING
me 1997
In No. 001-3492-001 5-4
SECTION 6 ALIGNMENT PROCEDURE
6.1 GENERAL
Receiver or transmitter alignment may be neces-
sary if repairs are made that could affect tuning.
Alignment points diagrams are located in Figure 6-5
or component layouts are located in Section 8.
Fabricate test cables by refen'ing to Figure 2-1.
This cable should include power and ground‘ a trans-
mit keying switch that shorts the keying line to
ground, data input and data output The test setup
must apply the various supply voltages and load the
synthesizer with channel information.
6.2 TEST EQUD’MENT
Modulation Analyzer, HP8901 or equivalent
RF Signal Generator, HP8656 or equivalent
Frequency Counter and "sniffer" probe
Power Meter
Oscilloscope
Digital Multimeter
20 dB Attenuator
Power Supply, HP8264A or equivalent
Audio Analyzer, HP8903A or equivalent
Misc. cables, connectors, attenuators.
00000000000
6.3 INITIAL SETTINGS
1. Adjust power supply voltage to +l3.3V DC.
2. Turn oﬁ'the power supply.
3. Connect RF and power cables.
Turn on the power supply.
. Using a DC voltmeter, monitor the DC voltage at
thejunction of R812/R814 (wiper of R814), referto
Figure 55.
Adjust R814 to 2.1V DC iOtOSV.
Verify the bias voltage at 1201, pin 6 is +2.5V DC
$0.05V.
6.4 VCO CONTROL VOLTAGE
l.
2.
Connect the test setup shown in Figure 6-1.
Adjust R525 fully counterclockwise.
Load the synthesizer with the HIGHEST channel
frequency in the band.
Key the transmitter.
A Verify the voltage at TP800 is < 5V DC.
Unkey the transmitter.
Load the synthesizer with the LOWEST channel
frequency in the band.
Key the transmitter.
. Verify the voltage at TPSOO is > W DC.
0. Unkey the transmitter.
6.5 mNSNﬂTTER AND FREQUENCY
NOTE: If the radio is intended to use Diagnostics or is
Radio/Loader board combination go to Section 6.6
. Connect the test setup shown in Figure 6—1.
t [pad the synthesizer with a channel frequency in
the MIDDLE of the band.
. Key the transmitter.
. The voltage at J201, pin 2 should be I3.3V DC.
[Do not transmit for extended periods.)
5.
6~I
Adjust R525 clockwise for 5.0w 1] W. Adjust volt-
age and power if necessary.
Check the power at a channel ﬁ-equency on the
LOW and HIGH ends of the band. The power out-
put should be 4-6W with current less than 2.5A.
June 19917
Part No. 00l-3492-00]
LIGNMENT PROCEDURE
5.1 MODULATION ALIGNMENT
Apply 11 IV, 100 Hz square-wave to 1201, pin 6.
Transmit into the modulation analyzer and observe
modulation output on the oscilloscope. Set the
modulation analyzer high pass ﬁltering OFF and no
less than a 15 kHz low pass filter.
Preset R818 to the center position.
Load the synthesizer with a channel frequency at
the MIDDLE of the band.
Adjust R818 for a ﬂat square wave.
Apply a 100 Hz sine-wave to 1201, pin 6. The mod-
ulation analyzer should still have the 15 kHz low-
pass ﬁlter selected.
Adjust the audio analyzer output level to achieve a
transmit deviation of:
1.5 kHz for 12.5 kHz BW radios
3.0 kHz for 25 kHz BW radios
Load the synthesizer with a channel frequency at
the LOW end of the band.
Input 3 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
.Apply a 1 kHz sine-wave. The level should be
within 1:2 dB ofthe reference at 100 Hz.
.Load the synthesizer with a channel frequency in
the MIDDLE ofthe band.
Input a 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
Apply a 1 kHz sine-wave. The level should be
within $2 dB of the reference at 100 Hz.
Load the synthesizer with a channel ﬁ'equency in
the HIGH end of the band.
.1nput a 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
re 1997
1 No. 001-3492-001
6-2
16.Apply a 1 kHz sine-wave. The level should be
within 12 dB of the reference at 100 Hz.
17. Unkey the transmitter.
We umm
Figure 6-1 TRANSMITTER TEST SETUP
6.6 TRANSNHTI‘ERIFREQUENCY WITH
LOADER
NOTE: If the radio is not intended to use Diagnostics
go to Section 65.
NOTE: Subtract the current drawn by the Test Loader
or any Interface Units ﬁom all measurements.
1.
Set the Diagnostic Enable DAC (DAC4) to 255,
(FFh).
Select a Transmit channel frequency in the MID-
DLE ofthe hand. Make sure voltage at 1201, pin 2
is 13.3V DC.
Adjust R535 fully clockwise for maximum power
output.
Adjust the Power Adjust DAC setting (DACl) to
set the power output to SW :1:0.3W. Make sure volt-
age 31.1201, pin 2 is 13.3V DC.
Adjust voltage and power if necessary.
6. Repeat Step 5 for channels on the LOW and HIGH
ends of the band.
7. Power output should be 4.7—5.3W (50% duty cycle)
and current should be less than 215A.
8. Select a Transmit channel frequency in the MID-
DLE of the band
9. Adjust the frequency displayed on the Modulation
Analyzer to the desired channel frequency by
adjusting the TCXO W801).
6.6.1 MODULATION ADJUSTMENT
1. Apply a IV, 100 Hz square wave to 1201, pin 6.
2. Transmit into the modulation analyzer and observe
modulation output on the oscilloscope. The modu-
lation analyzer should not have any high pass ﬁlter-
ing selected and no less than a 15 kHz low pass
ﬁlter.
3. Select a Transmit channel frequency in the MID-
DLE of the band. The DAC value should be "125".
4. If the square wave is peaked on the edges, adjust
R818 down in value for the ﬂattest square wave.
5. Repeat Steps 3 and 4 for channels on the LOW and
HIGH ends of the band.
6. Input a 100 Hz sinewave to 1201, pin 6. The mod-
ulation analyzer should still have the 15 kHz low
pass ﬁlter selected.
7. Adjust the audio analyzer output level to achieve a
transmit deviation of:
1.5 kHz for 12.5 kHz radios or
3 kHz for 25 kHz radios.
8. Select a Transmit channel frequency at the LOW
end of the band.
9. Input a 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
10.Apply a 1 kHz sine-wave. The level should be
within 1:2 dB of the reference at I00 Hz.
ll.Select a Transmit channel frequency in the MID-
DLE of the band.
ALIGNMENT PROCEDURE
12.1nput a 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
13.Apply a 1 kHz sine-wave. The level should be
within $2 dB of the reference at 100 Hz.
14. Select a Transmit channel frequency in the HIGH
end of the band.
15.Input a 100 Hz sine-wave and set a 0 dB reference
on the Modulation Analyzer.
161Apply a 1 kHz sine-wave. The level should be
within 22 dB of the reference at 100 Hz.
17.Unkey the transmitter.
cmnvﬁk‘am
asavlti um
Figure 6-2 TX WITH LOADER TEST SETUP
6.7 RECEIVER
C A U T I O N
Do not key the transmitter with the generator con-
nected because severe generator damage may reruIt.
NOTE: All distortion and SINAD memurements are
performed with psophometric audio ﬁltering.
1. Connect the test setup shown in Figure 6-3.
2. Preset tuning slugs of L2 12 and L222 ﬂush with the
top of the can.
3, Preset C223 to the center position (slot in-line with
axis of the part).
4. Re-adjust L212 and L222 clockwise 2 tums.
June 1997
Part No. 001-3492-00]
LlGNMENT PROCEDURE
Load the synthesizer with a receive channel fre-
quency at the MIDDLE of the band.
Apply a —47 dBm signal from the RF signal generlur
to J501 on the radio. Adjust deviation for:
1.5 kHz with 1 kHz tone for 12.5 kHz radios
3 kHz with 1 kHz tone for 25 kHz radios.
DTE: Maintain these deviation levels throughout the
st when measuring AC levels, SINAD and % distor-
m, unless otherwise instructed
Preset L230 for 2.5V DC 20.05V at 1201, pin 13.
Set RF signal generator to -105 dBm, unmodulaml.
Set generator frequency to :
3 kHz below channel center on 12.5 kHz radios
5 kHz below channel center on 25 kHz radios
I.Adjust C223 (ﬁrst) and L212 for peak RSS] voltage.
(Use 2V scale on DVM.)
.Apply a -47 dBm signal from the RF signal genera-
tor to J50] on the radio with standard deviation lev-
els.
LAdjust L222 for minimum distortion (psophomeui-
cally weighted).
.Set RF signal generator to -105 dBm, unnrodulared.
.Adjust L212 for peak RSSl voltage. (Use 2V scale
on DVM.)
Apply a -47 dBm signal from the RF signal genera-
tor to ISO] on the radio with standard deviation lev-
els.
Adjust L230 for maximum receive‘audio voltage.
Verify that the receive audio RMS voltage is
150 mV £50 mV.
.Verify that the receive audio DC voltage is
2.5V tOJV.
.Measure the % distortion
(spec is <3% psophometrieally weighted).
re 1997
1 No. 0014492410]
__________—_______________________—__.___._———-——
64
20.Adjust the amplitude of the RF signal generator on
J501 until an 12 dB SINAD level (psophometrically
weighted) is reached.
21.Measure the 12 dB SINAD sensitivity. The RF
input level should be less than -I 16 dBm (0.35 uV).
"mix
MSIIMX
Figure 6-3 RECEIVER TEST SETUP
22.Load the synthesizer with a receive channel fre-
quency to the LOW end of the band.
23.Verify the RF generator amplitude level is less than
-116 dBm at 12 dB SINAD.
24.Load the synthesizer with a receive channel fre-
quency to the H'lGH end of the band.
25.Verify the RF generator amplitude level is less than
-116 dBm at 12 dB SINAD.
26.Adjust generator RF level to -120 dBm and measure
DC (RSSI) voltage on 1201, pin 12 ofthe radio
(spec is less than or equal to 0.90V DC).
27.Adjust generator RF level to - 120 dBm and measure
DC (RSSI) voltage on 1201, pin 12 ofthe radio
(spec is less than or equal to 0.8V DC).
28.Adjust generator RF level to ~60 dBm and measure
DC (RSSl) voltage on J201, pin 12 of the radio
(spec is greater than or equal to 1.7V DC).
Figure 6-4 Rx WITH LOADER TEST SETUP
ALIGNMENT PROCEDURE
7 E
1501
C223
A840
L222 @
Figure 6-5 ALIGNMENT POINTS DIAGRAM
6-5
June I997
Part No. OCH-34924)“
LlGNMENT PROCEDURE
ne 1997
n No. 00l-3492-00l
6—6
SECTION 7
SYMBOL PART
mum nascmmnu uumm
3492 TRANSCEIVER
PART NO. 242-3492-510 (12.5 kHz)
PART NO. 242-302-530 ( 25 kHz)
A 840 VCO 928-960 MHz 023-3492-540
C 100 22 pF i5% NPO 0603 510-3674-220
C 101 1 uF 16V SMD tantalum 510-2625-109
C 110 l uF 16V SMD tantalum SIG-2625409
C 111 22 pF i5% NPO 0603 510-3674-220
5104625409
510-3674-220
510-3674-220
5 I 0—3675~ l 03
C112
C113
C114
C115
1 1.117 16V SMD tantalum
22 pF i:5% NPO 0603
22 pF i5% NPO 0603
.01 uF 110% X7R 0603
C 116 .01 “F i10% X7R 0603 510-3675-103
C 117 .01 uF $10% X7R 0603 510-3675-103
C 118 .01 uF 110% X7R 0603 510-3675-103
C 119 l uF 16V SMD tantalum 510-2625-109
C 120 1 “F 16V SMD tantalum 510-2625-109
C 122 22 pF t5% NPO 0603 510-3674—220
C 123 22 pF 25% NPO 0603 510-3674-220
C 130 22 pF *5% N'PO 0603 510-3674—220
C 131 22 pF tS‘Vn NPO 0603 510—3674-220
C 132 l uF 16V SMD tantalum 510-2625-109
C 133 .01 pF 3:10% X7R 0603 510—3675-103
C 134 1 pF 16V SMD tantalum 510-2625-109
C 135 22 pF i5% NPO 0603 510—3674-220
C 136 22 pF iS‘Vo NPO 0603 510-3674-220
C 137 .01 uF110%X7R0603 510-3675-103
C 138 22 pF t5% NPO 0603 510-3674-220
C 139 .1 pFiS‘M: X7R 1206 510-3609-104
C 140 101 MP 110% X7R 0603 510-3675-103
C 141 .0082 i107» X7R 0805 510-3605-882
C 142 22 pF atS'Va NPO 0603 510-3674-220
C 143 .01 1,117 110% X7R 0603 510-3675-103
C 144 22 pF :1:5% NPO 0603 510-3674—220
C 145 1 uF 16V SMD ummlum 510-2625—109
C 146 22 pF 15% NPO 0603 510-3674-220
C 170 22 pF 15% NPO 0603 510-3674—220
C 171 22 pF tS% NPO 0603 510-3674-220
C 172 22 pF 15% NPO 0603 510-3674-220
C 173 22 pF t5% NPO 0603 510-3674-220
C 174 22 pF 15% NPO 0603 510-3674-220
C 175 22 pF d:5% NPO 0603 510~3674—220
PARTS LIST
SYMBOL
NUMBER
C 176
C 177
C 178
C 179
C 180
C 181
C 182
C200
C201
C202
C203
C204
C206
C207
C210
C211
C213
C214
C217
C218
C219
C220
C223
C224
C225
C226
C227
C228
C230
C231
C232
C233
C234
C235
C236
C237
C240
C241
C242
C243
C244
C245
C246
C248
22 pF i5% NPO 0603
22 pF t5% NPO 0603
22 pF i5% NPO 0603
22 pF tS‘Vo NPO 0603
22 pF t5% NPO 0603
22 pF iS% NPO 0603
22 pF 15% NPO 0603
22 pF iS% NPO 0603
22 pF iS'Vo NPO 0603
.01 1.11“ 110% X7R 0603
3.3 pF iOJpF NPO 0603
.01 uF110% X7R 0603
2.2 pF i0.1pF NPO 0603
22 pF i5% NPO 0603
.01 uF i10ﬂ/a X7R 0603
22 pF $502, NPO 0603
22 pF £0.1pF NPO 0603
9.1 pF £0.1pF NPO 0603
,01 pF t10°/u X7R 0603
22 pF t5% NPO 0603
22 pF 15% NPO 0603
.01 uF $1 0°/n X7R 0603
15-5 pF SMD ceramic
2.4 pF $0. lpF NPO 0603
.01 uF 110% X7R 0603
6.2 pF 10.110]: NPO 0603
10 p17 t0.1pF NPO 0603
.01 uFilO% X7R 0603
.01 uFi10% X7R 0603
.01 pF 110% X7R 0603
.01 uF 110% X7R 0603
.01 uF 110% X7R 0603
.01 |,1F 3:10% X7R 0603
10 pF 10.11)?” NPO 0603
.01 uF £10% X7R 0603
.01 HF i10% X7R 0603
47 uF 10V SMD tantalum
.01uFilO"/o X7R 0603
22 pF 15% NPO 0603
18 pF 1:5% NPO 0603
.001 “F 110?“ X7R 0603
15 pF ﬁ% NPO 0603
.01uF110%X7R 0603
.001 "F110% X7R 0603
DESCRIEHDN
PART
NUMBER
510-3674-220
510~3674—220
510-3674-220
510—3674—220
510-3674-220
510-3674—220
510-3674-220
5104674420
510-3674-220
510-3675—103
510-3673-339
5 10»3675-103
510—3673-229
5104674420
510-3675-103
510-3674-220
510-3673-229
510-3673-919
510—3675-103
510-3674-220
510-3674—220
510-3675-103
512-1602-001
510—3673-249
5 10—3675— 103
510-3673-629
510-3673-100
510-3675-103
510-3675-103
510-3675-103
510~3675-103
510-3675-103
510-3675-103
510-3673-100
510-3675-103
510-3675-103
510-2624-470
510-3675-103
510-3674-220
5103674480
5 1 0—3675— 102
510-3674-150
510-3675-103
510-3675-102
June 1997
Pan N11 001-3492-001
ARTS LIST
{MBOL
UMBER
249
250
251
252
253
261
262
263
264
265
266
267
268
269
270
500
501
502
503
504
505
506
510
511
512
513
514
515
516
517
518
520
521
522
523
524
526
527
528
529
530
531
533
534
540
541
542
.1 pF 15% X7R 1206
.01 uF ilO‘Va X7R 0603
101 pF £10% X7R 0603
1 pF 16V SMD tantalum
101 pF i10% X7R 0603
22 pF 15% NPO 0603
22 pF 15% NPO 0603
22 pF 15°41 NPO 0603
.01 uF 110% X7R 0603
5.6 pF 10.1131: NPO 0603
22 pF i5% NPO 0603
22 pF iS‘Vo NPO 0603
22 pF 55°21 NPO 0603
.01 1,11: 3:10% X7R 0603
1.8 pF tOJpF NPO 0603
22 pF i5% NPO 0603
.01 11]: ill)% X7R 0603
68 pF i5% NPO 0603
10 pF iOJpF NPO 0603
22 pF 596 NPO 0603
22 pF 15% NPO 0603
22 pF t5% NPO 0603
22 pF 15% NPO 0603
22 pF 15% NPO 0603
22 pF 15V» NPO 0603
22 pF 15% NPO 0603
1 [AF 16V SMD tantalum
22 pF 3:5% NPO 0603
1 1m 16V SMD tantalum
1 1117 16V SMD tantalum
22 pF t5% NPO 0603
.01 pF th% X7R 0603
22 pF t5% NPO 0603
22 pF i5% NPO 0603
.01 pF 110% X7R 0603
22 pF 15°61 NPO 0603
.01 111“ 3:10% X7R 0603
22 pF iS‘Vn NPO 0603
22 pF 19/0 NPO 0603
22 pF tS‘Va NPO 0603
.01 uF d:10% X7R 0603
10 pF 10.1pF NPO 0603
.01 pF tIO‘Vo X7R 0603
IO pF 10.1pF NPO 0603
22 pF 2517/11 NPO 0603
6.2 pF 15°41 NPO 0805
4.3 pF 15% NPO 0805
me 1997
rt N0. 001-3492-001
DESCRIZUDN
PART
MEMBER
510-3609-104
510—3675403
510-3675-103
510-2625-109
510-3675-103
510~3674-220
510-3674-220
510-3674—220
510-3675-103
510-3673-569
510-3674-220
510-3674—220
510-3674-220
510-3675-103
5 111-3673» I 89
510-3674-220
510-3675- 103
510-3674—680
510-3673-100
510-3674-220
510—3674—220
510-3674-220
510-3674-220
510-3674-220
510-3674v220
SIG—3674420
510—2625-109
510—3674-220
510-2625-109
510-2625-109
510-3674-220
510-3675-103
510-3674-220
510-3674-220
510-3675-103
510-3674-220
510-3675-103
510-3674-220
510-3674-220
510-3674-220
510-3675-103
510-3673-100
510-3675- 103
510-3673- 100
510-3674-220
510—3601-629
510-3601—439
7-2
SYMBOL
MEMBER
C 543
C 544
C 545
C 546
C 547
C 548
C 549
C 550
C 551
C 552
C 800
C 801
C 802
C 803
C 804
C 805
C 806
C 807
C 808
C 809
C 810
C 81]
C 812
C 813
C 814
C 815
C 816
C 817
C 818
C 819
C 820
C 821
C 822
C 823
C 840
C 841
C 842
C 843
C 844
C 845
C 846
C 847
C 850
C 851
C 852
C 853
C 854
C 855
DESCRIHIQN
3.9 pF 4512, NFC 0305
3.3 pF 150/11 NPO 0305
2.7 pF 25% NPO 0805
22 pF 3m NPO 0003
22 pF 1m NPO 0603
68 pF 2594, NPO 0603
01 111= 41002, X7R 0503
10 pF 10.1pF NPO 0603
2.4 pF 3-512. NPO 0305
10 pF 00.110 NPO 0503
01 “F 51m X7R 0603
22 pF t5% NPO 0603
01 up 210% X7R 0603
22 pF 252. NPO 0603
.01 pp 31072. X7R 0503
01 up 31m X7R 0603
01 n1= 31m X7R 0603
22 pF tS% NPO 0603
1.5 pF 55101 NPO 0603
2.7 pF 20.1171: NPO 0603
22 pF 152. NPO 0603
22 pF 552. NPO 0603
22 pF 3m NPO 0003
22 pF 1m NPO 0603
22 pF 1m NPO 0603
1 111: 16V SMD tantalum
22 pF 3m NPO 0603
100 1.117 35% NPO 0003
039 1117 15% X7R 1206
0039 1.17 51012. xm 0805
0039 "F 11012. X7R 01105
1 pr 16V SMD 011101111111
22 pF 5542 NFC 0603
10 pF 10.111? NPO 0603
.01 0F 01012. X7R 0603
22 pF 0554. NPO 0503
4.7 pF 1ov SMD tantalum
01 nr 01002. x71z 0603
01 111“ 110% X7R 0603
01 111“ 010V. X7R 0003
01 up 31 00/1 X7R 0603
.01 1117110021 X7R 0603
22 pF 0m NPO 0603
22 pF ¢5% NPO 0003
22 [JP 55% NPO 0603
22 pF 55°41 NPO 0603
01 up 21m xm 0603
01 up 110% X7R 0603
PART
NHMBEB
510—3601-399
510-3601-339
510-3601—279
510-3674-220
510-3674~220
51035744530
510-3675-103
510-3673-100
5103501249
510-3673-100
510-3675-103
5103674-220
510-3675-103
5103570220
5103575403
5 1 03575-103
510-3675-103
510-3674-220
510-3674-159
510—3673-279
510-3674-220
510-3674-220
510—3674-220
510-3674-220
SIC-3674220
5 10»2625-109
510—3674-220
510-3674-101
5103609493
510-3605-392
510-3605-392
510-2625-109
5103574220
510-3673-100
510-3675-103
510—3674—220
510-2624-479
510-3675-103
5 10-36754103
510—3675-103
510-3675-103
510-3675-103
510-3674—220
510-3674-220
510-3674-220
510-3674-220
510-3675-103
510-3675-103
SYMBOL
minim
C 856
C 900
C 901
C 902
C 903
.01 1117 110% X7R 0603
.01 pF 110% X7R 0603
.01 nF th‘Vo X7R 0603
.01 ”F $10% X7R 0603
101 uF110% X7R 0603
CR200 Switching diode SOT-23
CR240 Varacwr BBSSS SOD-323
CR530 Hot carrier SOT-23
CR531 Hot carrier SOT-23
CR540 PIN switch diode SOT-23
CR541 Pl'N switch diode SOT-23
CR840 Varactor BBS35 SOD-323
EP130 Ferrite bead SMD
PART
MEMBER
510-3675-103
510-3675-103
510-3675-103
5 I 0-3675- 103
510-3675-103
523-1504-002
523-5005-022
523-1504-016
523-1504-016
523-1504-001
523-1504—001
523-5005-022
517-2503-001
EP200 Mini oer crystal pin insulator 010-0345-280
EPSlO Ferrite bead SMD 517-2503-001
EP511 Ferrite bead SMD 517-2503-001
EP512 Ferrite bead SMD123 517-2503-010
EP513 Ferrite bead SMD 517~2503~001
HW102 Gmfoil MHW 806 (25 kHz) 018—1007-104
HW104 900 MHz module shield 017-2225-754
HW104 4-40 machine panhead ZPS 575-1604—010
J 201 14-pin single row header 515»7110—214
J 501 Jack right angle PC mount 142-0701-501
L 200 2.2 nH iIO% 0805 SMD 542-9003-226
L 201 8.2 nH inductor LL2012 542-9003-826
L 210 22 n1-1 111m SMD 542-9003-227
L211 15 nH inductor LL21012 542-9003-157
L 212 270 nH variable SMT 542-5103-157
L 221 0.39 pH inductor SMD 542~9001-398
L 222 270 nH variable SMT 542-5 103- 157
L 230 680 111-1 quad coil 542-5102-001
L 240 120 nH 50 x 80 chip 542-9007-121
L 260 10 nH 3:10% 0805 SMD 5429003407
L 261 2.7 nH i10% 0805 SMD 542-9003-276
L 262 10 nH 110% 0805 SMD 542-9003-107
L 500 I pH inductor SMD 542-9001-109
L 540 8 nH air core inductor SMD 542-0030-003
L 541 12.5 nH air core inductor SMD 542-0030004
L 542 8 nH air core inductor SMD 542‘0030003
L 543 1 111-1 inductor SMD 542~9001~|09
L 544 2T 24 AWG 0.081D 542-0030-002
SYMBOL
Mummmzuom
MP101 Heat sink
MPIOZ Grafoil MHW 806
MP102 900 MHz shield (25 kHz)
MP107 Low pass
MP108 Synthisizer bottom shield
MPBOI VCO can
MP806 Crysml ﬁlter shield
NPN digital 47k/47 transistor
PNP digital 10k/47 transistor
NPN digital 47k/47 transistor
NPN digital 47k/47 transistor
NPN digital 47k/47 transistor
PNP digital 10k/47 transistor
NPN digital 47k/47 transistor
PNP digital 10k/47 transistor
NPN high current SOT-223
PNP gen purp SC70 MSB1218
NPN low noise SOT-23
Dual gate GaAS
VHF/UHF amp SOT-23
NPN low noise SOT-23
PNP gen purp SC70 MSB1218
Bipolar MMIC SOT-143
NPN high current SOT—223
Q 100
Q 101
Q 110
Q 130
Q 131
Q 132
Q 133
Q 134
Q 135
Q200
Q 201
Q 211
Q240
Q 260
Q 261
Q 500
Q 520
Q 800
Q 340
Q 841
Q 842
Q 343
Q 344
Q 845
Q9ll
NPN digital 47k/47 transistor
NPN digital 47k/47 transismr
NPN digital 47k/47 transistor
NPN digital 47k/47 transistor
NPN digital 47k/47 transistor
NPN Si SOT-23
R110
R111
R112
R113
R114
R130
R131
R132
R133
R134
R135
R136
R137
R138
100k ohm 15% 0.063W 0603
51k ohm 15% 0.063W 0603
15k ohm 1506 0.063W 0603
100k ohm 1594; 05063W 0603
15k ohm tS% 0.063W 0603
100k ohm t5% 0.063W 0603
1k ohm i5% 0.063W 0603
22k ohm 15% 0.063W 0603
43k ohm 15% 0.063W 0603
10k ohm tS‘Vn 0.063W 0603
10k ohm 15% 0.063W 0603
150k ohm t5% 0,063W 0603
150k ohm 15% 0.063W 0603
10k ohm 1:57; 0.063W 0603
PARTS LIST
PART
111MB
014-0778—047
018-1007-104
017-2225-754
017-2225-771
017-2225—772
017-2225-751
017-2225-699
576-0013-046
576-0013-032
576-0013-046
576-0013-046
576-0013-046
576-0013-032
576—0013-046
576—0013-032
576—0006-027
576-0013-700
576—0003-636
576—0006-405
576-0003-634
576—0003-636
576—0013-700
576—0003-640
576—0006—027
NPN gen purp sc70 MSD1819 5700013401
576~001 3-046
576—0013-046
5 76-0013-046
576-0013-046
5 76-001 3-046
NPN gen purp SC70 MSD1819 576—0013-701
576-0003-658
569-0155-104
569-0155-513
569-0155-153
569-0155~ 104
569-0155-153
569-0155-104
569-0155-102
569-0155-223
569-0155-433
569-0155-103
569-0155-103
569-0155‘154
569-0155-154
569—0155-103
June 1997
Part No 001-3492—001
\RTS LIST
'MBOL PART SYMBOL PART
JMBER nmcmm mmmm MIMER DESCRIEDDN MIMBER "\
139 470 ohm 15% 0.063W 0603 569-0155-471 R 520 470 ohm 15% 0.063W 0603 569—0155—471
140 3.6k ohm i5% 0.063W 0603 569-0155-362 R 521 10k ohm d:5% 0.063W 0603 569—0155-103
141 5.6k ohm i5% 04063W 0603 569—0155-562 R 522 100k ohm t5% 0.063W 0603 569-0155-104
148 10k ohm i5% 0.063W 0603 569-0155-103 R 525 100k ohm SMD trimmer 569—0130-104 ‘
200 12k ohm i5% 0.063W 0603 569-0155-123 R 526 10k ohm £5% 0.063W 0603 569-0155-103
201 39k ohm t5% 0.063W 0603 569-0155—393 R 527 10k ohm 15% 0.063W 0603 569—0155-103
202 300 ohm t5% 0.063W 0603 569-0155-301 R 528 10 ohm 1:5% 0.063W 0603 569-0155-100
203 39k ohm t5% 0.063W 0603 569-0155-393 R 529 10k ohm 15% 0.063W 0603 569—0155—103
205 22k ohm t5% 0.063W 0603 569-0155-222 R 531 10 ohm 15°41 0.063W 0603 5690155100
212 10 ohm 15% 0.063W 0603 569-0155-100 R 532 10k ohm 15% 0.063W 0603 569-0155-103
213 1k ohm t5% 01063W 0603 569-0155-102 R 534 1k ohm i5% 0.063W 0603 569-0155-102
214 10k ohm i5% 0.063W 0603 569-0155-103 R 535 51 ohm 3:5% 0.063W 0603 569-0155-510
215 160 ohm 15% 0.063W 0603 569—0155-161 R 536 IR ohm 15% 0.063W 0603 569-0155-102
223 1.5k ohm d:5°/a 0.063W 0603 569-0155-152 R 537 51 ohm 15% 0.063W 0603 569-0155-510
230 3.3k ohm iS"/n 0.063W 0603 569-0155-332 R 540 100 ohm t5% 0.75W 2010 569-0135-101
231 2.4k ohm 15% 0.063W 0603 569-0155-242 R 541 47k ohm 15% 0.063W 0603 569-0155—473
232 39k ohm t5°/n 0.063W 0603 569-0155-393 R 800 4.7k ohm 15% 0.063W 0603 569-0155-472
233 33k ohm t5% 0.063W 0603 569—0155»333 R 801 4,7k ohm iS% 0.063W 0603 569-0155472
234 7.5k ohm 25% 0.063W 0603 569—0155»752 R 802 4.7k ohm 15% 0.063W 0603 569-0155-472
(12.5 kHz BW) R 803 68k ohm i5% 0.063W 0603 569-0155-682
18k ohm t5% 0.063W 0603 569—0155-183 R 804 6.8k ohm 15% 0.063W 0603 569-0155-682
(25 kHz BW) R 805 6.8k ohm iS% 0.063W 0603 569-0155-682 _\
240 100 ohm £5% 0.063W 0603 569-0155-101 R 806 20 ohm 15% 0.063W 0603 569-0155-200
241 75k ohm t5% 0.063W 0603 569—0155-753 R 808 4.7k ohm i5% 0.063W 0603 569-0155-472
(1245 kHz BW Only) R 809 10k ohm i5% 0.063W 0603 569-0155-103
242 68k ohm 15% 0.063W 0603 569—0155-683 R 810 4.7k ohm 15% 01063W 0603 569-0155-472
243 22k ohm 15% 0.063W 0603 569—0155-223 R 811 51 ohm t5% 0.063W 0603 569-0155-510
244 10 ohm i5% 0.063W 0603 569-0155-100 R 812 4.7k ohm :5% 0.063W 0603 569—0155-472
245 1k ohm i5% 0.063W 0603 569-0155-102 R 813 16k ohm 15% 0.063W 0603 569—0155-163
246 100k ohm i5% 0.063W 0603 569-0155-104 R 814 100k ohm SMD trimmer 569-0130-104
247 330 ohm i5% 0.063W 0603 569-0155-331 R 815 120k ohm tS% 0.063W 0603 569-0155-124
248 330 ohm 15% 0.063W 0603 569-0155-331 R 816 39k ohm £5% 0.063W 0603 569411 55-393
249 22k ohm iS% 0.063W 0603 569-0155-223 R 817 10k ohm :5% 0.063W 0603 569-0155-103
250 4.7k ohm 15% 0.063W 0603 569-0155-472 R 818 220k ohm d:5% 01063W 0603 569-0155-224
260 2.2k ohm i5% 0.063W 0603 569-0155-222 R 819 68k ohm 15% 01063W 0603 569-0155-683
261 390 ohm d:5% 0.063W 0603 569-0155-391 R 820 10k ohm 15% 0.063W 0603 569—0155-103
262 39k ohm t5% 0.063W 0603 569-0155-393 R 821 10 ohm i594: 0.063W 0603 569-0155-100
263 220 ohm t5% 0.063W 0603 569-0155-221 R 822 18k ohm i5% 01063W 0603 569-0155-183
264 12k ohm t5% 0.063W 0603 569-0155—123 R 823 10k ohm tS‘Vn 0.063W 0603 569-0155-103
265 39k ohm t5% 0.063W 0603 569-0155-393 R 840 10k ohm i5% 0.063W 0603 56941155403 -
266 100k ohm :5% 0.063W 0603 569-0155-104 R 841 3.9k ohm i5% 0.063W 0603 569-0155-392
267 8.2k ohm i5% 0.063W 0603 569-0155-822 R 842 10k ohm 15% 0.063W 0603 569-0155-103
500 270 ohm $5% 0.063W 0603 569-0155-271 R 843 3.9k ohm i5% 0.063W 0603 569-0155-392
501 18 ohm 15% 0.063W 0603 569-0155-180 R 844 10k ohm 15% 0.063W 0603 569-0155-103
502 270 ohm i5% 0.063W 0603 569-0155-271 R 845 4.7k ohm 15% 0.063W 0603 569-0155-472
503 470 ohm 15% 01063W 0603 569»0155—471 R 846 24 ohm t5% 0.063W 0603 569—0155-240 ""
504 470 ohm i5% 0.063W 0603 569-0155-471 R 847 24 ohm tS% 0.063W 0603 569—0155-240
ne 1997
11 No, 001-3492-001 7-4
____________________________________.________—
SYMBOL
NUMBER
R848
R849
R900
R901
R911
R912
R913
R914
U 110
U 111
U 130
U230
U510
U520
U800
U840
U900
U901
U902
Y 800
Z 200
Z 201
Z 220
Z 220
Z 221
Z 221
Z 230
Z 230
Z 231
2231
DEW
24 ohm ﬁ% 0.063W 0603
24 ohm i596 0.063W 0603
10k ohm t5% 0.063W 0603
10k ohm 15% 0.063W 0603
10k ohm i5% 0.063W 0603
47k ohm iS% 0.063W 0603
47k ohm i5% 0.063W 0603
1k ohm t5% 0.063W 0603
Voltage regulator adjustable
Voltage regulator adjustable
Quad op amp 80-14 33]
FM IF SA676DK
6W power module 900 MHz
0p amp 80-8 MC33172D
Fractional-N synthesizer
s-stage shiﬁ regimr SOIC
Quad 8-bit TLC56201D
8-smge shiﬁ register SOIC
3 2-clml analog mnx/demux
17.5 MHz TCXO 11.5 PPM
944 MHz 3-pnle ceramic
944 MHz 3-pcle ceramic
87.85 MHZ 4-pole 8 kHz BW
(12.5 kHz BW)
87.85 MHz 4-pole 15 kHz BW
(25 kHz BW)
87.85 MHz 4-pole 8 kHz BW
(12.5 kHz BW)
87.85 MHz 4-pole 15 kHz BW
(25 kHz BW)
450 kHz 9 kHz BW ceramic
(12.5 kHz BW)
450 kHz 20 kHz BW ceramic
(25 kHz BW)
450 kHz 9 Id-lz BW ceramic
(12.5 kHz BW)
450 kHz 20 kHz BW ceramic
(25 kHz BW)
PART
HUMMER
569—0155-240
569-0155—240
569-0155-103
569-0155-103
569-0155-103
569-0155-473
569-0155473
569-0155-102
544-2603-093
544-2603-093
544—2020-01 7
544—2002—03 7
5 44-400] -049
54442019—01 7
544‘3954-027
544-3016-094
544-203 1 -014
544-301 6-094
544-3016-053
5 1 8-7009-521
532—2006-040
532—2006-040
532-0009-02 1
532-0009—022
532-0009-02 I
532-0009-022
532-2004-01 5
5324004-01 3
532-2004—01 5
53 2-2004-013
7-5
PARTS LIST
SYMBOL PART
BINDER DESCRLEIIQN MEMBER
VCO 928—960 MB:
Part No. 023-3492-540
C 820 22 pF d:5% NPO 0603 510—3674-220
C 821 22 pF £5% NPO 0603 510-3674-220
C 822 22 1:1" 15% NPO 0603 510-3674—220
C 824 1.5 pF 101 pF NPO 0603 510-3673-159
C 825 2 pF t0.l pF NPO 0603 510—3673-209
C 826 22 pF t5% NPO 0603 51 0-3674~220
C 827 22 pF t5% NPO 0603 510—3674-220
C 830 22 pF 15V.) NPO 0603 510—3674—220
C 831 22 pF 15% NPO 0603 510-3674-220
C 832 22 pF i5% NPO 0603 510-3674—220
C 833 6.8 1.71" 10.1 pF NPO 0603 510-3673-689
C 834 1 pF 10.1 pF NPO 0603 510—3673-109
C 835 22 pF 25% NPO 0603 510-3674-220
C 836 43 pF 10.1 pF NPO 0603 510-3673-439
C 838 1 [JP :1:0.1 pF NPO 0603 510-3673-109
C 840 .001 uF 3:10% X7R 0603 510-3675-102
C 841 22 pF 15% NPO 0603 510-3674—220
C 842 22 pF $01 pF NPO 0603 510-3673-229
C 844 3.9 pF 10.1 pF NPO 0603 510—3673-399
C 845 3.9 pF 10.1 pF NPO 0603 510—3673-399
C 846 2.7 pF 10.1 pF NPO 0603 510—3673-279
C 850 22 pF 15% NPO 0603 510-3674—220
C 851 4.7 pF 10,1 pF NPO 0603 510-3673—479
C 852 22 pF i5% NPO 0603 510-3674—220
C 853 22 pF i5% NPO 0603 510—3674-220
C 854 22 pF t5% NPO 0603 5 |0~3674—220
C 860 22 pF i5% NPO 0603 510-3674-220
C 861 4.3 pF $0.1 pF NPO 0603 510-3673—439
7C 863 2 pF 101 pF NPO 0603 510-3673-200
CR820 PIN switch diode SOT 523-1504—001
CR82I PIN switch diode SOT 523-1504—001
CR822 Varactor SOD-323 BBS35 523-5005-022
CR824 Varactor SOD-323 33535 523—5005-022
L 820 68 nH $1036 SMD 0805 542-9003—687
L 821 68 nH 110V“ SMD 0805 542-9003-687
L 822 68 MI 110% SMD 0805 542-9003-687
L 823 68 nH i10% SMD 0805 542-9003-687
L 825 68 nH th% SMD 0805 542-9003-687
L 826 Rmnator 0.5" long SMD 542-9004—011
L 830 68 nH 11W:- SMD 01105 542-9003-687
L 831 12 HH inductor LL2012 542-9003-127
L 832 3.3 nH inductor ceramic 542-9003-336
L 833 10 nH inductor LL2012 542-9003-107
June 1997
Part No. 001-3492-001
'ARTS LIST
YMBOL PART
[UMBER DESCBIEELQN NUMBER "\
y 820 NPN u‘ansistor NE85619 576~0003~651
2 821 NPN transistor NESS6I9 576-0003-651
2 822 NPN transistor NE85619 576-0003-651
2 823 NPN transistor NESS619 5760003-651
1820 10k ohm iS‘Vo 0.063W 0603 569-0155—103
’1 821 100 ohm tS% 01063W 0603 569-0155-10]
L 822 10k ohm i5% 0.063W 0603 569-0155-103
L 823 10k ohm i5% 0.063W 0603 569-01 55- 103
L 824 3.3k ohm t5% 0.063W 0603 569-0155-332
‘1 825 10 ohm tS% 0.063W 0603 569-0155- 100
‘1826 150 ohm tS% 0.063W 0603 569-0155-151
L827 10 ohm tS‘Vn 0.063W 0603 569-0155-100
‘1 830 413k ohm tS‘Vn 0.063W 0603 569—0155-432
1 831 516k ohm 15% 0.063W 0603 569-0155-562
1 832 3k ohm 25% 01063W 0603 569—0155-302
1 833 200 ohm 15% 0.063W 0603 569-0155-201
1 835 200 ohm 15% 01063W 0603 569-0155-201
1 836 200 ohm 15% 0.063W 0603 569-0155-201
1 840 100 ohm i5% 0.063W 0603 569-0155-101
1 842 27k ohm 15% 0.063W 0603 569-0155-273
1843 349k ohm t5% 0.063W 0603 569-0155-392 [A
—\
ne 1997
In No. 001-3492-001 7-6
7—~__—___________—.___—__———-—.——————
01.3286 4-LEVEL 9600 Bps MODEM
SERVICE MANUAL
3286 9600 / 4800 BPS PROGRAMMABLE 4—LEVEL FSK MODEM
PART NO. 242-40VW—WYZ
Copyright© 1998 by the Johnson Data Telemetry Corporation
The Johnson Data Telemetry Corporation designs and manufactures radios and radio modems to serve a wide variety of data
communication needs. The Johnson Data Telemetry Corporation produces equipment for the ﬁxed data market including
SCADA systems for utilities, petrochemical, waste and ﬂesh water management markets and RF boards for OEM applications
in the Radio Frequency Data Capture market.
JOHNSON DATA TELEMETRY PRODUCT WARRANTY
The manufacturer‘s warranty statement for this product is available ﬁom your product supplier or from the Johnson Data
Telemetry Corporation, 299 Johnson Avenue. PO Box 1733, Waseca, MN 56093-0833. Phone (507) 835-88”.
WARNING
This device complies with Part is of the FCC mlesr Operation is subject to the condition that this device does not cause
harmful interference. in addition, changes or modiﬁcation to this equipment not expressly approved by Johnson Data
Telemetry Corporation could void the users authority to operate this equipment (FCC rules, 47CFR Part 15.19)
DO NOT allow the antenna to come close to or touch, the eyes, face, or any exposed body pans while the radio is transmitting.
DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere.
DO NOT operate the radio unless all the radio lrequency connectors are secure and any open connectors are properly
terminated.
DO NOT allow children to operate transmitter equipped radio equipment.
SAFETY INFORMATION
Proper operation of this radio will result in user exposure below the Occupational Safety and Health Act and Federal
Communication Commission limits.
The information in this document is subject to change without notice
Johnson Data Telemetry is a trademark of the Johnson Data Telemetry Corporation.
all—m0— A_hiwammzrnv ® IBM is a registered trademark of Intemational Business Machines.
“SO“
TABLE OF CONTENTS
Section 1 - GENERAL MORMATION
Title N nmber
1.1 SCOPE OF MANUAL .......................
1.2 INTRODUCTION
1.2.1 GENERAL ............
1.2.2 DL-34I2, DL<3422, OR DL-3492 ...............
1.3 ACCESSORIES ...................
1.4 FACTORY CUSTOMER SERVICE .
1.5 PRODUCT WARRANTY .......
1.6 REPLACEMENT PARTS ............
1.7 IF A PROBLEM ARISES ............
1.7.1 mey Repair ........ . . . .
DL-3286 SPEClFICATIONS ............................................... 1—5
Section 2 - SETUP AND ALIGNMENT
2.1 GENERAL ............................................................
2.1.1 INTRODUCTION ..................
2.2 SETUP ........
2.2.1 GENERAL ...... . . . .
22.2 EQUIPMENT REQUIRED . .
2.2.3 ADmsmENTs ..............
22.4 8 POSITION DIP SWITCH SIoo .........
2.2.5 TRANSMIT DEVIATION LEVEL ADJUSTMENT.
2.2.5 RECEIVE LEVEL ADJUSTMENT ............................ , . .
2.2.7 2.5 VDC LEVEL ADJUSTMENT ...................................... 2-3
Section 3 — PROGRAMMING
3.1 GENERAL ........................
3.1.2 INTRODUCTION ..............
3.1.3 3276 PROGRAMMING OPERATION ...........
3.2 3286 WINDOWS ....................................
PanNo. 001-3286—001 bhhﬁw-
TABLE OF CONTENTS
3.2.1 FILE . . .
3.2.2 EDIT ........................................
3.2.3 EDIT FREQUENCIES WINDOW .................
3 .2.4 UTILITIES ..................
3.2.5 PROGRAM CODE ............
32.6 PRODUCTION TEST ..................
3.2.7 SETUP PRODUCTION FREQUENCIES .
3.2.8 I7 KEY FUNCTIONS ........
3.2.9 TEST FILE ........
3.2.10 ENGNEER ...............
3.2.11 WNDOW ......................................................... 3-12
Section 4 - PROTOCOL
4.1 INTRODUCTION
4.1.1 GENERAL . . ..
4.2 RTU INTERFACE ...........
4.2.1 INTERFACE DESCRIPTION .
4.2.2 FLOW CONTROL PROTOCOL
4.2.3 RTSICTS HANDSHAKING PROTOCOL ........
4.3 DIAGNOSTICS ...............
4.3.1 GENERAL ..............
4.3.2 HARDWARE DIAGNOSTICS
4.3.3 NETWORK DIAGNOSTICS ................... . .
4.3.4 MISCELLANEOUS .................................................. 4—4
Section 5 - CIRCUIT DESCRIPTION
5.1 GENERAL ...................
5.1.1 INTRODUCTION. . .
5.1.2 TRANSMIT DATA .
5.1.3 RECEIVE DATA .........
5.1.4 SYNTHESIZER PROGRAMMING .............
5.1.5 POWER SUPPLIES ..........................
5.1.6 MISCELLANEOUS FUNCTIONS ................................. 5-2
Seclinn 6 - SCHEMATICS AND LAYOUTS
6.1 GENERAL .............................................................. 6-1
”TAM“
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TABLE OF CONTENTS
a“
List of Figures
Figure/Title Page
Number
2-1 3286 Programming Soﬁwm Screenr . .
2-2 3286 Modem Board ................
3-1 Main Window ..............................
3-2 Edit Radio Types Window. .
3-3 Edit Frequencies Window . .
3—4 Advanced Radio Frequencies Window . . .
3-5 Communication Settings Window ...........
3-6 Edit Radio Speciﬁcations Window ..........
3-7 Production Test Window .....................
3-8 Setup Production Frequencies Window .........................
4-1 RTU Data Controlled by CTS Signal ............................
4—2 Absence of CT 5 Signal in Small Packet Use ..............
4-3 RTS/CTS Handshaking Protocol (Resembling a PIT Signal) .........
5—1 Modem Board Functional Block Diagram .................................... 5-3
6-1 3286 Modem Board Component Layout (Top) ................... 6-1
6-2 3286 Modem Board Component Layout (Bottom) ........... . 6-2
6-3 3286 Modem Schematic .................................................. 6-3
iii our mwsm
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AME-gm;
TABLE OF CONTENTS
List of Table.
Table/Title Page
Number
l-l Accessories ............................................................ 1-1
2-1 Channel Selection ....................................................... 2-2
2.2 Setup Mode ............................................ 2-2
2-3 Dam Out Mode Functions ................................. 2-5
3-1 Radio Type/Frequency Range . . ....... 3-3
3-2 Tx Modes ......................... 3-10
343 F Key Functions ........................................................ 3-12
“TATE-[MET]?
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SECTION 1
GENERAL INFORMATION
1.1 SCOPE OF MANUAL
1.1.1 INTRODUCTION
This manual conmins setup and service information for the Johnson Data Telemetry (J'DT) DL—3286
Telemetry Modem. For servicing information on the 3400-series telemetry radios which may be used with this
modem, refer to the speciﬁc transceiver service manualr
1.2 MODEM DESCRIPTION
1.2.1 GENERAL
The function of a modem is to convert digital data to an analog signal which can be used to modulate an
RF carrier. The modem also converts the received signal hack into its original digital data. This allow digital
dam to be transferred using a wireless RF link.
1.22 DL-3412, Dir-3422 or DL-3492
When the JDT 3286 modem is paired with a DL-3412, DL-3422 or DL~3492, the radio modern covers the
full UHF band at 25 kHz, 12.5 kHz and 6.25 kHz channel steps and the ﬁll] VHF band at 30kHz, 15 kHz and
7.5 kHz channel steps. This modem uses a 4-Level Root-Raised Cosine FSK modulation scheme. It operates in
a half—duplex conﬁguration and has the capability to be set up in a repeater mode.The DL-3286 modem is
capable of packetized and non-packetized dataThe DL3286 supports Flow Control (FEC), DCE/DTE (FEC),
DCFJDTE (No FEC), Data only (FEC), and Data-only (no FCE) protocols.
The 3286 is capable of sending and receiving data at two different speeds. This can be used selectively to
change to the lower speed (if necessary). The half—channel modem has a high speed of 9600 bps and a low
speed of 4800 bps.
Front panel LEDs provide visual indication for transmit, receive and power. Set-up soﬁware uses a
Windows® Program and includes network diagnostics capable of showing the number of packets sent, number
of packes received, data reception quality and CRC packet errors. Programming set-up provides a unique
programming ID that allows diagnostics to be reported both locally and "over-the-air" from any location.
Built-in radio diagnostics are capable of reporting speciﬁc unit programming, loop back testing and radio
performance stan‘stics (i,e. RSSI, temperature, supply voltage, current, internal supply voltages, and transmitter
power).
blohi‘iéﬁii
Part No. 001-3286-001 Aw Cam
GENERAL INFORMATION
1.3 ACCESSORIES
Accessories available for the 3286 Modem are listed in Table 1-1. To order accessories by phone, dial the
toll—free number and enter "3" (see Section 1.4). The Sales Fax number is 507-835-6648 or orders may be sent by A
mail (see IDT address in Section 1.4).
Table 1-1 ACCESSORIES
—m
Setup and Diagnostic soﬁware with
Modem Programming/Power Cable,
4‘ long DB-9 mule to DB-9 female
Power Interconnect Cable 023-3472-004
3286 Service Manual 001-3286~001
3412 Service Manual 001-3412-002
3422 Service Manqu 00l-3422—001
3492 Service Manual 00l-3492-001 .~
1.4 FACTORY CUSTOMER SERVICE
The Customer Service Department of the Johnson Data Telemetry Corporation provides customer assistance
on technical problems and serves as an interface with factory repair facilities. Customer Service hours are 7:30
am. - 4:30 pm. Central Time, Monday - Friday. In the continental United States, the Technical Service
Department can be reached at this toll-ﬁ-ee number:
1-800-992-7774
When your call is answered at the Johnson Data Telemetry Corporation, you will hear a brief message that
contains the options: 1 for Sales, 2 for Order Entry, 3 for Customer Service, 4 for Marketing, 7 for other issues or
9 to repeat the message. If you have n pulse-type telephone, wait tmtil the message is finished and an operator will
come on the line to assist you,
mu terms-m 1-2
Llohnson
AM Gwyn-mg Part No. 001-3286-001
GENERAL INFORMATION
With a touch—tone type telephone, you may also enter the 4-digit extension number ofthe person that you
want to reach if you know what it is.If you are calling from outside the continental United States, the Customer
Service telephone numbers are as follows:
Customer Service Department - (507) 835-6911
Customer Service FAX Machine - (507) 8354969
You can contact the Customer Servioe Department by mail. Please include all information that may help
solve your problem. The mailing address is:
Johnson Data Telemetry Corporation
Customer Service Department
299 Johnson Avenue
P.0. Box 1733
Waseca, MN 56093—0833
JDT has an email address for customer general support:
support@johnsondata.corn
1.5 PRODUCT WARRANTY
_____________———-————
The warranty statement for this modem is available ﬁrm) the Warranty Department at JDT (see address or
telephone number in Section 1.44 The Warranty Department can be contacted for Warranty Service Reports,
claim forms, or any questions oonceming warranties or warranty service.
1.6 REPLACEMENT PARTS
_________.—...—__——-————-
To obtain replacement parts for the Db3286 Modem, contact the Service Parts Department at the address
or dial the toll-ﬂee number listed in the previous secn'on.
1.7 IF A PROBLEM ARISES...
Johnson Data Telemetry producs are designed for long life and failure-free operation. If a problem arises,
factory service is available. Contact the Customer Service Department before returning equipment. A service
representative may suggest a solution eliminating the need to return equipment.
PartNo.001-3286-001 1.3 bIOhnﬁgak-ﬁ.
AMW
GENERAL INFORMATION
1.7.1 FACTORY REPAIR
Component level field repair is not recommended on the 3286 modem. Surface mount technology is used to
install many components. Those components require specialized training and equipment to service. JDT’s factory
is best equipped to diagnose problems and make repairs.
When returning equipment for repair, ﬁll out a Factory Repair Request Form for each unit to be repaired
regardless of warranty status. These forms are available free of charge by calling Customer Service (see Section
1.4.) Describe the problem in the space provided and note any prior physical damage to the equipment. Include a
form in the shipping container with each unit. Your telephone number and contact name are important There are
times when technicians have speciﬁc questions that need to be answered in order to identify the problem and repair
the equipment,
When retuming equipment for repair, use a reference number on your paperwork in case you need to call
Customer Service about your unit. That number is referenced on the repair order to make it easier to locate your
unit in the lab.
Return Authorization (RA) numbers are not necessary unless you have been iven one by the Customer
Service Department. They require RA numbers for exchange units or if they want to be aware of a speciﬁc
problem. If you have been given an RA number, reference this number on the Factory Repair Request From sent
with the unit. 111e repair lab will contact the Customer Service Depamnent when the unit arrives,
ﬁlohﬁé’ﬁr’i‘ “
—“—“‘A W Coma, Part No. 001-3286—001
GENERAL INFORMATION
DL—3286 SPECIFICATIONS
The following are general speciﬁcations intended for use in testing and servicing this Modem. For
current advertised speciﬁcations, refer to the speciﬁcation sheet available from the Marketing Department
Speciﬁcations are subject to change without notice.
GENERAL
Dimensions
3412/22/92 4‘2"Lx3.25“Wx2.175"l-I
Operating Voltage unsv DC
Current Drain
3412/22/92 2100mATX, l20mARX
Operating Mode Half-Duplex
ant Panel Indicatms PWR, TX, RX
Data l/O Connector D39 to female
Time-Out Timer Variable second switchable on/off
Diagnostics Conﬁguration, test performance statistics
Power Connector 2 pin connector
DATA I/O
Data Rate 4800 or 9600 bps (user selectable)
Signal Level EIA 115-232
Data Format Asynchronous, serial
Word Length 8 bit words, 1 or 2 stop bits
Parity Even, odd, or none
Handshake RTS-CTS/Dm Only/F low Control
Turnaround Time RTS-CTS delny‘:
Bps Normal Delay Extended (an') Delay
4800 30ms 60ms
9600 3 Oms 601113
‘Times are extended lOms if online diagnostics are enabled.
NETWORK SPECIFICATIONS
Modulan'on 4 Level Root-raised cosine, FSK packet
Communication Mode Serial synchronous
BER 0 at ~ l01 dBm
|_5 DATA TElEMan_
rm Not 001-3286—001 EJIOhnson
A Dana-din Carrying
GENERAL INFORMATION
This page intentionaliy leﬁ blank.
16
DATA ramm_
bjohnson
AW‘ CM Part No‘ 001-3286—001
SECTION 2
SET UP AND ALIGNNIENT
2.1 GENERAL
2.1.1 INTRODUCTION
This section contains set-up and alignment for the Johnson Data Telemetry (JDT) DL3286 Modem. For
servicing information on the MOO-series telemetry radios which may be used with this modern, refer to the
speciﬁc transceiver service manual.
2.2 SET UP
_______—____—_-—-———————
2.2.1 GENERAL
The 3286 Modem is factory aligned and should not require adjustment in the ﬁeld. The following
procedure describes adjustments (if settings other than those set in the factory are desired)
2.2.2 EQUIPMENT momma]:
+10 to +16V adjustable, regulated 2.5 amp supply
Radio service monitor (IFR or equivalent)
Cable with SMA connector (modern to IFR)
An IBM compatible PC (running Windows® 3.11 or later)
Radio Service software (RSS)
RSS setup cable (DB-9 - DB-9 male to female)
common alignment tools
Power cable (Part number 023-3472—004)
2.2.3 ADJUSTMENTS
There are 4 adjustments on the DL-3286 modern.
8 Position DIP Switch 5100
Transmit Deviation Level Adjustment
Receive Level Adjusment
2.5 VDC Level Adjustment
2" L]oh°ﬁ§¢“3“"‘
Part No. 001-3286—001 m
SETUP AND ALIGNMENT
2.2.4 8 POSITION DIP SWITCH $100
The ﬁrst 3 DIP switches (l - 3) are for selecting the desired channel (Table 2-1). The last DIP switch (8) is for
putting the modem into setup mode (Table 2-2). For more information on programming channels see Section 3.
Table 2-1 Channel Selection
2.2.5 TRANSMIT DEVIATION LEVEL ADJUSTMENT
From the Production Test Screen of the 3286 Programmer Sohware select Random Data for TX Mode (see
Figure 2-1.) Hit the F5 key on the PC keyboard to key the transmitter. Adjust R508 to set the transmitter deviation
for 15 kHz (see Figure 2.2.)
2-2
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Part No. 001-3286—001
SETUP AND ALIGNMENT
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Fleq Pail: _
Range: RSSI Vizllage:
Fnlnard Panel:
. H: Frequency: Gems: Power:
T“ Frenucncy: ”6 - 93“ Remle Cor-uni: U Tmpéalule:
Synhnl Sync:
W E m... or“...
Enabh CD LED: OHM Mi:
j . . OantvEnd Ati:
5 Emlh TxLED. ODiag-ErlAdi:
“on": H): cu:
Hal Speed: D Eu! Pg Upan: Adi Upan 1110 T: CN:
5 11.1 k d:
Pluto-ml: Flow Control a ’" °° °
F2 Aulo Flwlt£nd Ad F3: lnil Tm! Salim: Fl: Stan Heﬂ Hun D' E _
F5: Trans-ha lJn F8: “ms-ital lJli F7: my" my "'
F3: Send Slat! Tu! F9: Tngju Nap Mnd= F"): Save Adi for Pail
Figure 2-1 3286 ngmming Snﬂware Screen
2.2.6 RECEIVE LEVEL ADJUSTMENT
[nput a -80 dBm signal on frequency mm the RF wansceiver modulated with a 1 2 kHz sine wave with 1.5
kHz of deviation. Monitor the recovered audio at T? 400 (see Fig 2- 2 ) Adjust 410 for 1Vp—p (354 me15. )
2.2.7 2.5 VDC LEVEL ADJUSTMENT
Adjust R 632 for 2.5 VDC at T? 600 (see Fig. 2—2.)
243 DATA YELEMEYK‘I
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SETUP AND ALIGNMENT
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2.5 VDC Adjust
RX level adjus1
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R410 [I R632
R503 \ a TPGOO
TX Deviaﬁon adjust
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2—4
LIOhDﬁSWOEﬁ Part No. 001-32st1
AMQW
SECTION 3
PROGRAMJVIING
3.1 GENERAL
3.1.1 INTRODUCTION
This section describes the use of the DL3286 Programming soﬁwm. The programming parameters are
factory installed with default parameters. Programming information is stored in an EEPROM in the modem’s
microprocessor. Desired, radio parameters, frequency and file changes are made using the 3286 Programming
soﬁware (part number 023-9998001) and the programming/power cable (part number 023-3286- .) This
information is designed for use by personnel familiar with normal radio shop procedures
3.1.2 3286 PROGRAMMING OPERATION
The 3286 programming soﬁware operates in a Windows® environment. When the 3286 program is run, a
blank window appears with the menu options:
File
Edit
Utilities
Program Code
Production Tat
Engineer
Window
Help
3-1 DATAWIIMEIKV-
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Fignre 3-1 an Window
3.2 3286 WINDOWS
This window provides access to pull-down menu options.
3 241 FILE
Data ﬁles contain the information for frequency programming and allow the user to install previously defined
conﬁgurations. Data ﬁle menu choices include
0 Open Data File - Opens a data ﬁle to he used in the Edit Frequencies menu
0 Save Data File - Saves the current data ﬁle with the current data ﬁle name
0 Save As Data File - Saves a data ﬁle with in new ﬁle name
0 Exit — Exits the 3286 programming soﬁware
3 2.2 EDIT
The Edit menu is used to used to create new ﬁles and setup or change radio parameters, frequency range and
channel spacing.
$lohmnn TElEMleV_ 3,2
A M W Part No. nor-323mm
PROGRAMIVIING
0 Radio Type » Toggles thmugh the available radio types (3412, 3422, 3492)
Elli“. Pm LED [Em]:
Ell-bl. CD LED lYil:
emu r: LEI) [ﬁnd]:
1114an Rain: [1
uodo- Punt-e
manna: Flow coma {Fm B
Mar sued: D
' ignneS—Z Edit Types Window
0 Radio Range - Toggls thmugh the frequency ranges l - 8 (see Table 3-1 for available JDT transceivers for
diﬂ‘enent ﬁ'equency ranges)
Part No. 001-328M01
Table 3-1 Radio Type/Frequency Range
380-403 MHz
403-419 MHz
419-435 MHZ
435—451 MHz
450-470 MHz
464—480 MHz
480-496 MHz
496-512 MHz
lSZ-lSOMHz
ISO-I74MHz
3-3
Frequency
Range
®]0h_°ﬁ‘_§8"ﬁ
AW—TM
PROGRAMMING
5 Frequency Steps - Toggles through frequency step sizes 2.5 kHz, 5 kHz, 6.25 kHz, and 7.5 kHz
NOTE: Frequency step size will not effect the functionality of the transceiver/modern. This is just a check
for the user to verify the selected frequency is the desired step size.
Example: If the user is operating on a 6.25 kHz system and enters a 7.5 kHz frequency, an error message will
be displayed but the 3286 software will load the 7.5 kHz frequency into the transceiver.
0 LED Functions - There are three LEDs on the 3286 modem. When there is power to the modem, the Power LED
(green) will be lit. When the receiver is receiving a carrier, the CD LET (yellow) will be lit.
When the transmitter is transmitting a signal, the TX LED (red) will be lit. These LEDs can be
enabled by clicking next to each one (see Figure 32.)
TX Only - When the TX Only is enabled, the receiver is disabled. When a transmit only radio is
used this function should be enabled.
0 Protocol « Selects the protocol between the computer and the modem. The protocol formats that are available
include Flow Control (Fl-2C - Forward Error Correction), DCE/‘DTE (FEC), DCEIDET (no FEC),
Data Only (PEG), and Data Only (no FEC).
o Half-Speed - Selects the RF wireless link speed; not the PC to modern link
Half—Speed enabled = 4800 bps
Half-speed not enabled = 9600 bps
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Part No. 001-3286—001
PROGRAMMING
3.2.3 EDIT FREQUENCIES WINDOW
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Figure 3-3 Edit Frequencies Window
0 Receive and Transmit Frequencies ~ There are a maximum of 8 pairs of channels (8 Rx and 8 Tx) that can be
programmed into the modem. Channel frequencies can be copied fmm one channel to another by double
clicking on the desired frequency, holding the right mouse button, dragging and dropping the data to the
channel to be changed.
The Tx CN, Rx CN, Tx Power, and Tx Mod values are all set to factory settings. To ovem'de the factory
settings, click on Override and type in the new CN numbers. Aﬁer all the parameters are set up, the data file
can be saved using the File pull—down menu and selecﬁng Save Data File or Save As Data File (see Section
3.2.1.)
Part No. 001-3286-001 3-5 bJOhDﬁéﬂaﬂﬁ-
AMGW
PROGRAMMING
1256 Pruumnum-l
h Panel: h Mud:
Figure $4 Advanced Radio Frequencies Window
0 Vension Request - Reports the current version of soﬁware downloaded to the 3286
0 Write or Read Parameters - Write sends the open data ﬁle to the 3286 modem. Read retrieves the current data
ﬁle from the modem Before a Read or Write Parameters is executed, press S 102 (see Section 2, Figure 2-2) to
put the modem into setup mode. Aﬁer the parameters are sent or received, the powerto the modern must be
cycled to place the modem back in normal operation so the data transfer can be completed
0 Cut - Deletes selected text and copies it to the PC’s clipboard
0 Copy - Copies selected text to the PC’s clipboard
5 Paste - Pastes text stored in the PC’s clipboard
DATA YEEMEIRY_ 3-6
blw Part No. 001-3286-001
PRO GRAMIVIIN G
3.2.4 UTILITIES
a Communication Settings - Sets pammeters for Com Port and Baud Rate for communication between the PC
and the modem Sets parameters for primary and secondary receive and transmit modes.
Coll Poll:
Baud Hale: Baud Hale:
Data Bit: Data Bit:
Paity: Pally:
Slop Bits: Stop Bit
DTH Enable:
Valua
Value
svm: Value (in Haul: th 1mm [x suns;-
es: Voile (in Hall:
3.7 MYATEIEMEYIV-
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PROGRAMMING
n Suluu Dielnulillmlmﬁﬂquuv ..~_.
0K: Eli aid Save
Camﬂ: Eli and Don'l Save
Dian Pair: Ila Frequency: Tn Frequency: Rn EN: In EN:
mm: mm» nu n:
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Figure 3—6 Edit Radio Speciﬁcations Wlndow
0 Edit Radio Specs - Resets default radio frequencies.
3.2.5 PROGRAM CODE
- Progam Code - To install a new version of ﬁrmware, die modern must be taken out of it’s case. Short the two
pins of J 102 and cycle power (see Section 2, Figure 2-2).
- Boot File change / Modem File Change - These functions are used only if the Boot Code needs to be changed or
a new Modem Code is to be installed imo Flash memory.
3.2.6 PRODUCTION TEST
This window allows initial setup of transceivers and displays diagnostics information for Temperature, RSSI,
voltage, current internal supply voltage, transmitm' power, VSWR, Symbol SyncRx CN, Tx CN, Synth locked.
and adjust for Power, Mod., Front-End, and Ding. En (see Figure 3-7.)
Parameters setup in this window are for temporary purposes. When the Production Test window is closed
these parameters are lost. For permanent dam settings, use the Edit Radio Specs. under the Edit pull-down menu.
Before any functions under the Production Test pull-down menu can he executed, press 8102 (see Section 2,
Figure 2-2) to put the modem in setup mode. When production testing is completed, power to the modem must be
cycled to place the modem in normal operation mode to complete data transfer.
Llohﬁﬁii' 3'”
—A w cam, Part No. 001-3286-001
Diagmdiu:
Volage:
Current: 0011 A
955! Voltage: 000 V
Fomaui inar: 0.00 V
Raven: Pnnel: 0.00 V
VSWR: 0.011
Temperature: 0.0 C
Symbol Sync: 0.00 V
6)qu Ali:
Ollod Adi:
O Fulﬁl-End Ali:
ODiag-En Adi:
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eke
Hx Frequency: 1160. 00001"
7: Frequency: I'M). 000000 Ramle cm D
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Endlle CD LED: E
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Hall Spud: D 1:1:ng UpIDn: Ali UpIDn . m
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SM Luckzd:
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F2 Ado Front—End Adi F3: m Tune Seﬂ'llgs F4; sun Heal um Di“ Em El
F8: Send sun In: rs: Tngje Nap Nude Fm: Save Mi rm Pair
Figure 3- 7 Production Test Window
o Tx Only - Disables the receiver: Must be selected when a transmit only radio is used.
0 Half Speed - Selccﬁ the RF wireless link speed (NOT the PC to modem link)
Half- -speed enabled= 4800 Bps
Half- -speed not enabled= 9600 Bps
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Part No. 0014235001 blah
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PROGRAMMING
0 Tx Mode
Table 3-2 Tx Modes
Mcﬁpﬁon
Full-Speed 1.2 kHz sine wave
Half-Speed 600 Hz sine wave
am'er is modulated with random data
- 'er is modulated with test data
- ‘er is modulated with a 100 Hz square
- Ding. En - Enables diagostics
0 Protocol - Selects the protocol between the PC and modem. The available protocols are Flow Control (FEC),
DCE/DTE (FEC), DCE/DTE (no FEC), Data Only (PEG), and Data Only (no PEG)
0 Radio - Toggles through compatible radio types (3412, 3422, 3492)
0 Range - Toggles through the frequency ranges (l - 8) See Section 1, Table l-l for JDT transceivers available for
individual frequency ranges.
0 LED Functions - There are three LED’s on the 3286 modem. When power is applied to the modem, the Power
(green) LED will be lit. When the receiver detects a signal, the CD LED (yellow) will be lit. When the
transmitter is sending a signal, the Tx LED (red) will be lit. These LEDs are enabled by clicking in the box.
0 Tx Only - Disables the receiver. Must be selected when a transmit only radio is used.
0 Half Speed - Selecm the RF wireless link speed (NOT the PC to modem link)
Half-speed enabled = 4800 Bps
Half-speed not enabled = 9600 Bps
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A M 6mm Part No. Del-32864101
PROGRAMMING
3 2.7 SETUP PRODUCTION FREQUENCIES
Some of the same functions appear in the Edit Frequencies window as in the Edit Radio Specs. window
(see Figures 3-6 and 3-8).
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g. ‘ieiup Production chuunules
Endﬂe PW LED: E] Heal Run Time: in S]
Endih CD LED: E
Endzlo TI: LED:
Tit-Olly: D
Hall Speed:
; Text Flequmeies Default DMZ Adi Values
5 than R! Flannel-qt Tu Flequenc] H: C" T: EN Pm Mad ant- End
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Figure 3-8 Setup Pmdnctinu Frequencies Window
0 Deﬁiult DAC Adj. Values - Allows temporary changes to Power Adj., Mud Adj., and Front-End Adj.To
change values, click next to the parameter and enter a new DAC value. Select OK to temporarily send new
parameter to the modem. If the Test Freq. pair is changed or the Production Test window is closed, the DAC
values will return to their original settings. Parameters may be permanently stored by pressing FIG.
PartNo.001-3236—00| 3'” b 10hnﬁ§u6ﬂﬁ
PROGRAMMING
32.8 F KEY FUNCTIONS
Table 3-3 F Key Functions \
Auto Front-End Adjust Automatically tunes from end ﬁllers of receiver
(amiable front-end currently available an DL-3422)
Initial Tune Settings Sends default seizing: to modem for Tx CN, Rx CN, Tx Pwr. and T 4
Mod.
No function
Transmitter ON Keys transmitter
Transmitter OFF Unkeys transmitter
No function
Send Start Test Puts modern into test mode
hits the modem/transceiver into a low current sleep
Permanent] saves current DAC values to modern
3.2.9 TEST FILE
Test ﬁles contain the information for frequency programming along with the CN, Power Adjust, Mod. _
Adest, and front end tuning (if applicable.)
0 Open Test File - Opens a data ﬁle for use in the Production Test or Edit Frequencies menu
a Save Test File - Saves the current data ﬁle with the current data ﬁle name
a Save As Test File - Saves a data ﬁle with a new ﬁle name
3 .2 . 1 0 ENGINEER
This window offers the same options as the Production Test Window as well as the option to make frequency
changes.
32.11 WINDOW
The pull-down window menu allows the user to set screen display preferences for Cascade, Tile Horizontally,
Tile Vertically or Arranging Icons.
Llohﬁsﬁﬁ “2
Part No. 001-3286—001
SECTION 4
3286 PROTOCOL
a“
4.1 INTRODUCTION
4r 1.1 GENERAL
The speciﬁcations is Secﬁnn 4 describe the requirements for the DL-3286, a 9600 bps half-channel or
19200 full—channel 4-level FSK Modern.
4.2 RTU INTERFACE
4.2.1 INTERFACE DESCRIPTION
The RTU Interface is an R5232 connection. The data format will he 8 data bits, 1 start bit, 1 stop bit and no
parity. The baud rate is programmable (19200 / 9600 / 4800 baud) with the 3286 Setup Soﬁware (a Windows®
based program.) While in the setup mode, the modem uses 9600 baud.
The Modern and the RTU uses either a Flow Control protocol or an RTS/CTS Handshaking protoool.
4.2.2 FLOW CONTROL PROTOCOL
When the Flow Control protocol is used, the modem will send packetized data containing Forward Error
Correction (FEC) information With this protocol, the Modem can be programmed to expect an ACK orNACK
for each packet sent7 or the modem can packetize the data and send as is. The CTS output of the Modem signals
the RTU when it can transmit characters and when it should not transmit characters. When the CTS is high
(asserted), the Modem’s receive buffer IS NOT full. When the CTS is low (unasserted), the Modem’s receive
buffer IS full, This is the default protocol since it sends data in packets and utilizes Forward Error Correction.
This protocol can be used by users sending small packets (less than xx characters) who do not want to deal
with the RTS and CTS signals. the following ﬁgures show the Flow Control protocol. Figure 4.1rl shows the
CTS signal controlling the ﬂow of data from the RTU, Figure 4.1.2 shows how a small packet (less than xx
characters) would not even use the CTS signal, since there were not enough characters to ﬁll the receive buffer.
” 3b] Mi???“
Part No. 001-3286-001 m
PROTOCOL
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Figure 4-1 RTU Dam Controlled by CTS Signal
mm» _@c> ---------------------------- m
c‘rsms-cy 27—h—
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Figure 4-2 Absence of 01‘s Signs] in Small Packet Use
4.2.3 RTS/CTS HANDSHAKING PROTOCOL
When the RTS/CTS Handshaking protocol is used, the modem will send raw data containing NO Forward
Error Conection information. with this protocol, the Modem CAN NOT be prommrned to expect an ACK or
NACK for each packet sent. This is the protocol used by the J'DT 3282 and 3276 Modems. Figure 4-3 shows the
RTS/CTS Handshaking protocol, where the RTS signal resembles 5 PH“ signal.
mm DOG ———————————————— COL
mm 3x_f—*_—L
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Figure 4-3 RTS/CTS Handshaking Protocol (Ruembling a PIT Signal)
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A M Com-J Part No. (ml—3286410!
PROTOCOL
4.3 DIAGNOSTICS
4.3.1 GENERAL
The 3286 Modern is capable of tracking different hardware (voltxges) and network (modem) diagnostics.
These diagnostics are available locally via the RSZ32 Interface and remotely via an RF link. Local diagnostics
are available only while the modem is in the setup mode. Remote diagnostics are available anytime, provided
there is a master modem connccwd to a PC running the Setup Soﬁwarel
4.3.2 HARDWARE DIAGNOSTICS
The 3286 Modem is capable of the following hardware diagnostics:
Input Voltage
Input Current
Temperature
RSSI
Forward Power
Reverse Power
0.0...
4.3.3 NETWORK DIAGNOSTICS
The 3286 Modem is capable of the following network diagnostics:
a Number of packets sent
a Number of packets received
0 Data reception quality
0 CRC packet errors
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PROTOCOL
4.3.4 MISCELLANEOUS
The 3286 Modem is capable of sending and receiving data at two different speeds. This could be used to
automatically change to the lower speed (if necessary.) The half—channel modem has a high speed M9600 bps and
a low speed of4800 hps.
Some programmable parameters are:
0 Number of re-tries (for modem setup to receive an ACK for each packet)
0 Ability to change baud rates automatically (for modem setup to receive an ACK for each packet)
A unique identiﬁcation number (65,000 numbers)
Mode to allow communication between two modems (with use of Unique 1D)
[M atm- Pan No. 001-3286-001
SECTION 5
CIRCUIT DESCRIPTION
5.1 GENERAL
5i1.1 INTRODUCTION
The modem board (Part number 023-3286—001) is a plug-in circuit board. The three main ﬁmctions of the
modem board include loading the synthesizer, providing the baseband modulating signal for the transmitter, and
demodulating receive audio signals. The modem board is programmed by a personal computer and sottware and
connects to the radio through a l4-pin connector, I 100. Programming channels and other operating parameters
are provided through a DB-9 connector. A block diagram of the modem is shown at the end of Section 5.
5.12 TRANSNHT DATA
Transmit data from the RS-232 port is level-shiﬂed to ‘l'I'L levels by Uzls. The MX919B modem, U210,
takes the digiml data stream and modulates the analog baseband signal using a 4 Level root Raised Cosine FSK
modulation scheme which is ﬁltered by U502 then applied to MOD_1'N (pin 6) of J 100.
The MX919B modem IC is a custom MX-COM 4 Level FSK packet data modern operating from 4800 to
19.2 kbps. The modem 1C adds forward error correction (FEC) and data correction (CRC) information/Alter
adding symbol and frame synchroniution codewords, the data packet is converted into ﬁltered 4—level analog
signals for modulating the radio. Potentiometer R508 sets the transmit deviation.
5. l .3 RECEIVE DATA
Received signals are ﬁltered by band-pass ﬁlter U402-3 and the gain is adjusted with R4! 0 to set the
correct analog levels for the modem 1C. The detected audio is fed to the input of the modem IC and also to a
symbol synchronization band-pass ﬁlter U402-l. From U402-l, the audio passes through a peak detector and
ampliﬁer U402—4 before moving to the processor which searches for a symbol sync pattern. Once the symbol
sync pattern is found, the processor enables the modem to start accepting the data from the low-pass ﬁlter,
U402-3. The modem IC takes the analog signals, removes the overhead bits, and performs the error correcting.
5. L4 SYNTI-[ESIZER PROGRAMMING
The processor loads the synthesizer on power up, wake up, and receive or transmit transitions. The
synthesizer load is sent on the SP1 bus with RF_SYNTH_ENABLE (pin 8 of J 100) asserted. The radio
synthesizer generates a lock detect signal to show when it is on frequency. This signal enters the loader on pin 7
of 1100 where it is buffered by U300. If the synthesizer is out of lock, the processor will remove the TX enable
(if present) and reload the synthesizer until lock is regained. Eight channel frequency select is provided by DIP
switches l, 2, and 3 ofSl.
54 Ljohﬁﬁﬁ‘
Part No. 00142364101 m
CIRCUIT DESCRIPTION
5.1.5 POWER SUPPLIES
U604 provides 55V for the receiver 5.5REG and analog modem circuitry, while U602 provides SV for the
CPU and other digital logic.
SJ .6 MISCELLANEOUS FUNCTIONS
An error condition (when the logic voltage regulator goes out of regulation) resets the processor. U606 is a
temperature sensor used by the ﬁrmware to compensate for variations in RSSI,
The RF module’s RSSl_0UT(J100 pin 12) is read by an analog input on the CPU, which implements a
squelch threshold in software. Various internal voltages (F_B+, analog VCC, RXSV, TXSV, SWB+) are read and
the diagnostics can be displayed using the available soﬁware.
Switch 3102 puts the CPU in programming mode in which the CPU accepts new boot code from the
soﬁware.
blol DATAYELWKVn_ 5.2
A Durand}: aw Part No» 001-3286-001

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CalAmp Wireless Networks 2424094-001 User Manual 8

CalAmp Wireless Networks Corporation 8

8

FCC ID Filing: NP42424094-001

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