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The GX-80/90 has been carefully aligned at the factory for the specified performance across the
frequency range specified for each version. Re-alignment should therefore not be necessary
except in the event of component failure, or altering version type. All component replacement
and service should only be performed by an authorized GENEX TELECOM representative, or
the warranty policy may be void.
Required Test Equipment
RF Signal Generator with calibrated output level at 1 GHz(or RADIO COMMUNITION TEST
SET)
Deviation Meter (Liner Detector)
AC Voltmeter
SINAD Meter
In-Line Wattmeter with 5% accuracy at 500 MHz
Regulated DC Power Supply adjustable from 4 to 10V, 3A
50Ω Non-reactive Dummy Load: 10W at 500MHz
Frequency Counter: ±0.2 ppm accuracy at 500MHz
AF Signal Generator
DC Voltmeter: High impedance
GX-80
Low Band Edge (Channel 1): 136.000MHz
Band Center
(Channel 2): 155.000MHz
High Band Edge (Channel 3): 174.000MHz
GX-90
Low Band Edge (Channel 1): 430.000MHz
Band Center
(Channel 2): 450.000MHz
High Band Edge (Channel 3): 470.000MHz
Note:
Signal levels in dB referred in the alignment procedure are based on 0 dBµ = 0.5 .
PLL & Transmitter
Set up the test equipment as shown for transmitter alignment. Adjust the supply voltage to 7.4V
for all steps where not specified otherwise.
GX-80 / GX-90 Alignment
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Summary of Contents for Genex GX-80
- Page 1 GX-80 / GX-90 Alignment The GX-80/90 has been carefully aligned at the factory for the specified performance across the frequency range specified for each version. Re-alignment should therefore not be necessary except in the event of component failure, or altering version type. All component replacement and service should only be performed by an authorized GENEX TELECOM representative, or the warranty policy may be void.
- Page 2 PLL VCV (Varactor Control Voltage) Connect the DC voltmeter between TP1 on the Main Unit and Ground. Set the transceiver to CH1 (low band edge), and adjust TC301 on the Main Unit for 1.0V ± 0.1V on the DC voltmeter, while receiving. Set the transceiver to CH1 (low band edge), and adjust TC302 on the Main Unit for 1.0V ±...
- Page 3 Check the deviation meter reading is ±0.7KHz (for 25KHz steps) or ±0.35KHz (for 12.5KHz steps) deviation. CDCSS Deviation Check the deviation meter reading is ±0.7KHz (for 25KHz steps) or ±0.3KHz (for 12.5KHz steps) deviation. Receiver Set up the test equipment as shown for receiver alignment. Sensitivity Set the transceiver to CH3 (high band edge) Turn the RF signal generator to the same frequency of the transceiver, than set the...
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