EMCEE Broadcast TTS50DS User Manual 8

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Document ID	79864
Application ID	CJGJ1SdhT6UhJP0QSuII1Q==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	15.7kB (196239 bits)
Date Submitted	2000-01-06 00:00:00
Date Available	1998-06-30 00:00:00
Creation Date	2001-05-03 09:24:49
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-05-03 09:24:51
Document Title	8

INSTRUCTION MANUAL ADDENDUM
TTSSO DS
SOLID STATE
S-BAND TRANSMITTER
ANALOG OPERATION
04/98
A1
A2
A.3
A4
A6
A.8
A 7
AS
ADDENDUM
THE TTSSODS TRANSMITTER
ANALOG OPERATION
Description ........................................................... A—1
Specifications .......................................................... A—1
Installation ............................................................. A—3
Operation .............................................................. A4
Periodic Maintenance Schedule ......................................... A—6
Recommended Test Equipment .......................................... A—a
Preprogrammed Fault Levels ........................................ . A—7
Output Power Calibration ........................................... , A—Y
Asa Forward Power ..... . A—7
Ash Reflected Power ................................................
A.1
A.2
SECTION I
THE TTSSODS TRANSMITTER
ANALOG OPERATION
Transmitter Description:
The EMCEE TTSSODS is a state onhe art S-Band transmitter capable of broadcasting MMDSIITFS
digital signals on any FCC specified channel from 21 50 to 2700MHz. The transmitters rated digital
power is 50 watts average. The TTSSODS is also capable of broadcasting analog signals at
100 watts peak combined servioe. forthose looking to the digital future but have not yet made the
transition. The TTSSODS uses the latest in solid state device and microwave circuit technologies
and employs advanced ergonomic controls. The result is a transmitter with superior pedormance
and reliability. Combined with a digital or analog modulator, the TTSSODS is easy to operate and
requires minimal service, Dual upoonversion eliminates the need for RF alignment. The TTSSODS
is LAN capable and can be monitored and controlled remotely. The transmitter can also be
upgraded to output 100 watts of average digital power by adding an EMCEE TSA100DS external
power amplifier.
Specifications:
Visual:
Output Power 100W peak
Emission 5M7503
Color Transmission NTSC, PAL, or SECAM
Output Frequency Range 2150—2700MHZ
Frequency Stability Visual Carrier flkHz
visual Output Power Stability 10.3dE
Spurious Products‘ 60dE below peak sync
Harmonics‘ 65dB below peak sync
lnten'nodulation Products (IM3) <»SDdB
RF Regulation g2%
Hum and Noise 3755118
'Measured at Output of Channel Combiner/Filter
A—1
Video Signal to Noise
K Factor (2T)
ICPM
Differential Gain
Differential Phase
Low Frequency Linearity
Frequency Response
Sideband Response’
Envelope Delay
Output |mpedance
IF Input Level
IF Input Impedance
Aural:
Output Power
Emission
Frequency Tolerance
Frequency Response
Pre-emphasis
Devialion
lF Input Level
Audio Distortion
Aural FM Noise
Aural AM Noise
<755dB
12%
53‘
£2%
£0
52%
10.5dB
Better than FCC 74.936(b)
Bauer than FCC 73.667(a)(3)
50 ohms (type N connector)
710dBm t BdB
75 Ohm/ENC
2.5W average (716dB re, visual)
250KF3E
Aural Carrier tiOOHz
£168
75 microseconds
25kHz Mono
50kHz Stereo
726dBm i 6dB
<140%
<760clB
<—60dB
' Measured at Output of Channel Combiner/Filter
A—2
A.3
General/Mechanical:
Operating Temperature 0 to +50°C
Maximum Relative Humidity 95%
Dimensions 10.5"H x19"W x 26.5"D
Weight 45 lb.
Power Requirements 90 to 270Vae, 47 to 63Hz
Power Consumption 1900W
Power Factor 0.9
installation:
The connectors and terminals mentioned in the following instructions are located on the rear of the
equipment, it is assumed that the installation of the TI'SZODS driver transmitter has been
completed as in section 1.3 of the TI'SZODS manual. If any of the connections referred to in this
section are already made, cheokthem to ensure that they did not loosen during shipment andtighten
if necessary.
1. After unpacking the amplifier, a thorough inspection should be conducted to reveal any
damage which may have Downed dun‘ng shipment. If damage is found, immediately notify
the shipping agency and advise EMCEE Broadcast Products (Customer Service) or its field
representative. Also check to see that any connectors, cables or miscellaneous equipment,
which may have been ordered separately, are included.
2. Place the amplifier in a clean, weatherproof environment providing adequate ventilation for
the exhaust fans at the rear of the amplifier. It is important to maintain the amplifiers
ambient temperature within the WC and +50°C limits.
3. Place the amplifier in its permanent location near an ac mains receptacle that supplies
90-270Vac at 47-63Hz and the TTSZODS that is driving it. The ac source should have a
minimum power capacity of 21 OOVA for the total TTSSDDS Transmitter.
IMPORTANT
Do not apply at: power to the amplifier at this time since its RF output must be
properly loaded before being placed in operation.
4. Place the amplifier‘s ac power switch to OFF.
A—S
A.4
10.
Place an appropriate ac power line protector (surge suppressor) across the ac line that will
supply the amplifier and plug in the amplifier line cord.
Place the TTSZODS Transmitterthat will be used as the driverinto Standby, and then switch
off its AC breaker.
If the output of the TTSZODS is connected to a channel combiner or antenna, disconnec1 it,
With the appropriate cable (EMCEE supplied), connect the RF OUTput of the TT520DS to
the RF leut of the 50W amplifier.
If appropriate, connect the channel combiner(s) to the antenna transmission line and then,
using an N to N 1/ ” Heliax (LDF4-SOA) or Superflex (FSJJ4-SOB) cable, connect the
TTSBODS RF OUTput (J2) to the appropriate mput port of the combiner network. It the
transmitter is being used as a standalone unit, connect J2 to the h'ansmitting antenna cable
With the appropriate cable (EMCEE supplied). connect F‘Cl J2 Interfacejack otthe TSASODS
to the Interface jack J3 of the TI'SZODS.
Plug the power cord of the transmitter cabinet into an appropriate electrical outlet that
supplies the correct ac voltage and current (21 ODVA per TTSSODS)
This completes the installation of the amplifier. Continue with subsection A.4, Operation.
Operation:
Once the installation instructions of subsection A.3 have been completed and the TI'SSODS has
been properly installed, proceed with the following steps to place the transmitter in operation, The
pictorial figures and operation ofthe LCD mentioned below can befound in the TTSZODS instruction
Manual.
1.
Switch the AC breaker, located on the lower right-hand side of the TSASODS amplifier rear
panel, to the ON position
Switch the AC breaker, located on the right-hand side of the Tl‘SZODS Transmitter rear
panel. to the ON position. The display in Figure 1—1, the Turn-On Display, will come up on
the LCD for about 5 seconds and then will change to Figure 1—2, the Main Menu. The Main
Menu display shows the transmitters actual forward and reflected power in a bar graph
format.
If the transmitter comes up in Operate Mode, the LED in the top right comer ofthe
OPERATE/STANDBY key is green, press the OPERATE/STANDBY key to place the
transmitter into standby. The key‘s LED will be red when the transmitter is in Standby, and
no Forward or Reflected power will be shown on the Main Menu power bars.
Press the soft key, at the bottom of the display, that is labeled CONT MENU. The display in
Figure 1-10, Control Menu, will appear.
Press the PWR ADJ soft key to get the display in Figure 1—1 1, Power Adjust Menu. Verify
that the FORWARD power is at the desired level. If not, use the arrow keys at the right of
the display and/or the 50% and 100% keys to set the power if necessary.
A4
10.
11.
12.
13.
14.
Press the FREQ ADJ key to get the display in Figure 1—12, Frequency Select Menu. Venn!
the frequency setting. If necessary, use the left and right arrow sofl keys, select the digit to
be changed and use the up and down arrow keys to set the digit. Repeat for all digits to be
changed. Press the ENTER key.
Press the CONT MENU key to return to the display in Figure 1710 . Press the FAULT ADJ
key to getthe display in Figure 1—13, Fault Level Adjust Menu. Verify that the tault levels are
at the desired values. To adjust the majorforward fault level, press the MAJ FWD key to set
the point at which a major fault will occurdue to the output power dropping below this level.
The letters MAJ FWD, above the key, will be highlighted when the key is pressed. Use the
up and down arrows to set the fault level. The major forward fault level is represented by the
solid block in the FWD bar. The minor fault level is represented by the outlined block. Set
the MIN FWD, MAJ REFL and MIN REFL fault levels in the same manner. The MAJor Fault
levels are the points at which the transmitter will go into Standby and request backup.
Press the CONT MENU key to return to the Control Menu. If Faults are disabled, press the
ENA FAULT key, If AGO is on, press the AGC OFF key.
If the transmitter is being used in a multiple transmitter system that is using the LAN
capability, ensure that the transmitter is in the REMOTE mode indicated by the LED in the
upper right corner of the LOCAL/REMOTE key being extinguished. if it is not, press the
LOCAL/REMOTE key.
Press the OPISTDBY key to the left of the display, You should observe the following:
a. The LED in the top right comer ofthe OP/STDBY should be illuminated green indicating
that the transmitter is in Operate.
b. The red FAULT and VSWR indicators and the yellow TEMP indicator, at the top of the
display, should be extinguished,
c. The green SYNTH LOCK indicator at the top of the display should be illuminated.
Press the MAIN MENU key to relum to the Main Menu. The FWD power bar should show
the correct 100% output level.
Press the STAT MENU key to get to the Status Menu as shown in Figure 1—3. All statuses
should be OK.
Press the PWR SPLY key to check power supply voltage levels in the display as in
Figure 1—7, Power Supply Menu.
Since an external power amp is being used, such as the EMCEE TSA50DS. return to the
Main Menu and press the PWR AMP key to check the status ofthe power amplifiers modules
and its power supplies, as in Figure 1—8, Power Amplifier Status Menu.
A—S
A.5 Periodic Maintenance Schedule:
OPERATION RECOMMENDATION
ALIGNMENT NONE
OUTPUT POWER CALlBRATION Upon installation and at one-yearintervals
thereafter (see subsection A.8).
FANS Inspect as often as possible (at least monthly)
and clean when necessary. N0 lubrication
needed.
A.6 Recommended Test Eguigment:
EQUIPMENT MANUFACTURER MODEL #
Digital Multimeter HEWLETT PACKARD E2378A
Oscilloscope TEKTRONIX 2232
VHF Sweep Generator WAVETEK 2001
50 Ohm RF Detector TELONIC BERKELEY 8553
30GB, 150W Attenuator NARDA 769730
Power Meter HEWLETT PACKARD 4358
Frequency Counter HEWLETT PACKARD 5386A
Spectrum Analyzer HEWLETT PACKARD 8594E
A—6
A.7 Preprogrammed Fault Levels:
Module Quantity MINor low MINor high MAJor low MAJor high
30 Watt Amplifier (A1, A2) Q1 l 5,5A 7,0A 5.0A — — — —
02 l 5,5A 7 GA 5.0A ————
Q3l 5.5A 7.0A 5.0A ————
Q4| 5.5A 7.0A 5 0A ____
QSI 5,5A 7.0A 5.0A ————
06! 55A 7,0A 5 DA ____
GAIN +9dB ——-— was ____
TEMP "n +eo=c —___ +go°c
A.8 Output Power Calibration:
To insure correct transmission parameters, the FORWARD % power bargraph display setting in the
Power Adjust Menu and the FORWARD and REFLECTED bar graph "A power displays in the Main
Menu should be checked and calibrated using the transmitters actual output poweras measured by
an extemal power meter. The TSASODS Amplifier and TI'SSODS Transmitter are factory calibrated
tor 50W average output at a FWD output power setting of 100%. For analog operation, the
Tl'SZODS is calibrated for100 watts peak power at a FWD bar graph setting 0f100%,
A. Ba Forward Power:
1,
Place the transmitter into STANDBY. Remove the top cover of the TSASODS Amplifier
drawer. Set up the test equipment in Figure 3-3.
Using the Control Menu, press the DISABLE FAULT soft key,
From the Power Adjust Menu, set the FWD power bar graph to 100% using the 100% soft
key. This is the percentage of the trensmittefs rated output power at which we want to
transmit and is the same as the upper left numerical percentage POWER in the Control
Menu. It may be different, however, from the FWD percent bar graph display in the Main
Menu which is the actual output of the transmitter shown as a percentage ofthe transmitters
rated output power. Place the transmitter into OPERATE, with the modulator providing only
the appropriate Visual iF signal (0% APL/Sync only).
The external power meter connected to the transmitter output should now read 59.5 watts,
taking into oonsmeration the 30dB attenuator. If the external power meter reeds other than
59.5 watts, adjust the FWD power, using the Front Panel up/down arrows, for a correct
reading,
Using the modulator, reinstate the aural canier and adjust the modulator AURAL CARRIER
LEVEL control for a 62 watt indication on the external power meter (59.5 average visual @
0% APL + 2.5W average aural @ 716dB re visual = 62 watts.)
Now. using a voltmeter, measure the dc voltage attest point TP1 in the Metering Detector.
It is accessible through the hole marked TP1 on the oover of the Metering Detector. Adjust
potentiometer R12, which is accessible through the hole marked R12. for voltmeter reading
of +4.0V at TP1. The FORWARD bargraphs in both the Main Menu and Power Adjust Menu
should now show 100%.
A.8b Reflected Power:
7.
10.
11.
Go to the Fault Level Adjust Menu and increase the MAJor REFLected trip level to its
maximum value (25%) by pressing the MAJ REFL soft key and then using the up arrow.
From the PowerAdjust Menu, adjust the FWD power for an external power meter reading of
15.5W (25% of the average output power at black).
Go to the Main Menu LCD Display.
Disconnect the attenuator from the RF OUTput of the amplifier and leave it open. With a
voltmeter, measure the dc voltage at test point TP2, accessible through the appropriate hole
in the top ofthe TSASODS Metering Detector (A3). Adjust R31 of A3. accessible through the
appropriate hole in the cover of A3, fora +4.0Vdc meter reading at TP2.
Place the transmitter into Standby. Replace the top cover. Reconnect an appropriate load
to the RF OUTput of the amplifier. Place the transmitter into Operate.
A—8
m‘m MEDQE
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