9.6 Check that transmit audio distortion is less than 5%.
9.7 Switch off the audio generator.
9.8 Set Filter 1 to 50Hz HPF. Set Filter 2 to 300Hz LPF.
9.9. Check the Hum and Noise
10. Accessory Test(MODE 1)
10.1 Connect an FM deviation meter (communication test set) to antenna test
point.
Set the deviation meter to read peak to peak maximum deviation.
Set Filter 1 to 50Hz HPF. Set Filter 2 to 15kHz LPF
10.2 Connect an audio generator (600ohm) to the the remote microphone test
points.
10.3 Press PTT on the remote. The deviation reading should be 1.5 Khz
.
11. Data deviation test (TEST mode)
Press and Hold “CANCEL”and “3” then reset to go to test mode. Select “2”.
To exit, press reset button
11.1 Connect an FM deviation meter(HP8920) to antenna test point.
11.2 Set the deviation meter to read peak to peak maximum deviation.
11.3 Set Filter 1 to 50Hz HPF. Set Filter 2 to 15kHz LPF.
11.4 Press RIGHT KEY to send DATA. The modulation meter should read
±
1.5Khz
12. Receiver Alignment
12.1 Set Filter 1 to 300Hz HPF. Set Filter 2 to 3kHz LPF.
12.2 Set the output level of the RF signal generator for -47dBm.
The generator should be set for 1.5kHz deviation at 1kHz modulation.
12.3 Check RX audio distortion is less than 5%.
12.4 Check RX Sensitivity is less than -118dBm by reducing the output level
of the RF signal generator until a 12dB SINAD reading is achieved
13. Squelch Threshold and Hysteresis
13.1 Set Filter 1 to 300Hz HPF. Set Filter 2 to 3kHz LPF.
13.2 Reduce signal generator level to its minimum level.
13.3 Increase level in 1dB steps until the unit opens squelch and has steady
audio output.
This should occur at or below -120dBm.
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