Raytheon IDS M3-VHF-136 110W VHF BASE STATION User Manual USERS MANUAL RX SYNTHESIZER

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Document ID	1676152
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Document Description	USERS MANUAL RX SYNTHESIZER
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Document Title	USERS MANUAL RX SYNTHESIZER
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MM102819V1, Rev. B
5.1
5.2
MAINTENANCE
SERVICE NOTES
The following service information applies when aligning, testing, or troubleshooting the RX Synthesizer:
Aligning, troubleshooting and repair of the synthesizer module is best done with the T00650 RF Module
Test Fixture (Model TSIOIZSSVH only) and nol in the slalion. The station is a vital pan of the radio
system and should remain operational and not taken out of operation while working on a module. For
that reason' we recommend servicing the module oIT line using the RF Module Test Fixture. More
information about the test fixture can be found in the RF Module Tesl Fixture manual MMIOIXSSVI and
Programming Guide MSIOZSSJVI.
o The RX Synthesizer is aligned or "standardized” to specific parameters so it can be installed or
swapped with a module in a station with minimum station level settings.
0 Logic Levels:
Logic I = high = 4.5 to 5.5 Vde
Logic 0 = Low = 0 to 0.5 Vdc
o The synthesizer is locked on frequency when the front panel LED indicator is Off and a logic high is
present on the Flag_2 line (13 pin IZC)
- Always verify synthesizer lock after each new data loading.
TEST EQUIPMENT AND TOOLS REQUIRED
5.2.1 Test Eguigment
- HP 8901“! Audio Analyzers or equivalent
0 Power Supply: +13.8V @ 500 mA
0 Power Supply: ~t>| 2V @ 500mA
0 RF signal source for I2.8 MHz £0 Hz. I0 dBm reference
0 Frequency Counter: 1 MHz - 250 MHz
0 Power Meter: -20 (13111 to + I 3 dBm
0 Spectrum Analyzer: 0-I GHz
- MIA-COM RF Module Test Fixture TQO650 (TSI 01285VI ”(replaces power supplies listed above)
0 Personal computer and MASTR lII RF Module Alignment sofiwure for synthesizer loading
11
MM102819V1, Rev. B
Wlndows’ NT 4.0 .
_ (Servlee Pack 8) Windows 2000 Wlndows XP 1
RAM for Wlndows 128 Megabytes 128 Megabytes 128 Megabytes
Hard Drlve Space 150 Megabytes 160 Megabytes 180 Megabytes
m CD-ROM CD-ROM CD-ROM
m 1LPT (Parallel Port) 1LPT (Parallel Port) 1LPT (Parallel Port)
Microsoft Internet Version 5.01 or higher Version 5.01 or higher Version 5.01 ortligller
Explorer
5.2.2 Tools
0 Torx° screwdriver (T l 5)
Allen Hex Key Set (3/32") or 3/8" common screwdriver with the tip
1/8“ common screwdriver or tuning tool
ESD protection equipment
5.3 SETUP
5.3.1 Connect to Text Fixture
I. Connect the RX Synthesizer to the RF Test Fixturc as shown in Figure 5- l.
2. Connect the PC computer to.” I on the test fixture
3‘ Run the “MASTR lll RF Module Alignment" program on the PC.
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Figure S—I: Initinl Test Setup
12
MM102819V1, Rev. B
9'
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5.3.2 Initlalization
I. Apply power to the test fixture.
2. Verify that the unlock indicator (CRI ) is on and that Flag} (J I. pin IZC) is low.
5.3.3 Current Consumption
I. Measure the current on the +118 VDC supply on connector” (pins MG, BIG. & 06)
24 Verify the current is less than 200 mA.
St Measure the current on the NZ VDC supply on connector ll (pins AIS, BIS. & 05).
At
Verify the current is less than 50 mA.
TEST PROCEDURE
5.4.1 Reference Oscillator
Ground the M signal (J I, Pin AI ).
Connect the Power Meter to 13.
Verify that there is no output at 13.
Apply an external reference signal (12.8 Mllz@ I0 dBm tl dB) to the Ext Rgfln connector (M).
Verify that the output level at 13 is 0 dBm 1:3 dB.
Change the external reference signal to 5 MHz.
Verify that the output level at 13 is 0 dllm 13 Ml
Change the external reference signal to I9.2 MHz.
Verify that the output level at J} is 0 dBm 13 dB.
. Remove the ground from the Int Osc signal (ll pin A I ).
I l.
. Verify that the power out is 0 dBm 13.0 dBr
. Connect the Frequency Counter to J}.
Measure the output power of the reference oscillator output (13)
. Adjust YI for an output frequency of I2.8 MHZ 15 Hz.
13

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