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5-142.
Power Monitor Mode
1.
Set the UUT to the Power Monitor Mode. Set the RF Step Attenuator to the 30 dB position. and select
the Gen/Mon Mtr Display. Connect the RF power source to the RF In/Out Jack. Key the power source
and verify a correct power reading on the CRT display. Unkey the power source.
2.
Set the UUT to the Monitor Function and verify that the RF Step Attenuator is in the 30 dB position. Key
the RF power source and verify the presence of an audible alarm and a warning display on the CRT.
Unkey the power source.
5-143.
Monitor Mode
1.
Set the UUT to the Monitor FM Function. Set the Squelch Control to the OFF position and verify the
presence of a Sig Lvl indication and noise at the speaker. Turn the Squelch Control full on and verify
the absence of a Sig Lvl indication and noise at the speaker.
2.
Repeat paragraph 5-143.1 except for the AM Function.
3.
Repeat paragraph 5-143.1 except for the SSB/DSBSC Function and enable the BFO. Afterthetestturn
the BFO off.
4.
Select the Narrow Band FM Monitor Function at 300 MHz and set the RF Step Attenuator to the 0 dB
position. Connect the RF Signal Generator to the RF In/Out Jack and the SINAD Meter to the Demod
Out Jack. Set the RF Signal Generator for a center frequency of 300 MHz and for 3 kHz FM at a 1 kHz
rate. Adjust the RF output level from the Signal Generator for a 10 dB reading on the SINAD Meter.
Verify that the Signal Generator's level is less than -103 dBm (1.5
11
Vrms).
5.
Calibrate the RF Signal Generator for 3 kHz FM at 1 kHz rate using the Modulation Meter. Set the
Generator for a nominal output level of -60 dBm and connect it to the RF In/Out Jack of the UUT. Select
the Gen/Mon Mtr Display and verify a monitor deviation reading of 3kHz ±150Hz.
6.
Calibrate the RF Signal Generator for 50 kHz FM at a 1 kHz rate. Select the Wide Band Mode on the UUT
and verify a reading of 50·kHz ±2.5 kHz on the CRT deviation display.
7.
Calibrate the RF Signal Generator for 30% AM at a 1 kHz rate. Set the Generator for a nominal output
level of -60 dBm and connect it to the RF In/Out Jack of the UUT. Select the Monitor AM Function and
the Narrow Band Mode. Verify a monitor AM reading of 30% ±5%.
8.
Monitor the % AM Displayed on the CRT while increasing the RF level out of the Signal Generator.
Verify that the IF Overload Warning occurs before the displayed AM exceeds a reading of 30% ±5%.
9.
Select the Modulation Display on the UUT and verify the presence of the received modulation signal.
10.
Select the Gen/Mon Mtr Display and the Wide Band Mode on the UUT. Vary the center frequency on
either the UUT or the Signal Generator and verify that the Frequency Error Display properly represents
the difference between the UUT's Center frequency and the Signal Generator's center frequency.
11.
Select the IF Display on the UUT and verify the presence of an IF envelope on the CRT.
5-36
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