Troubleshooting
Troubleshooting Assembly Level Problems
1-35
900 Power Supply
1. Replace the 10 ALC.
901 Detector Test
1. Turn the signal generator’s RF power on and set the frequency to 10 GHz and the RF power level to
+25 dBm. Disconnect the cable from J3 of the A10 ALC (W15) and connect the cable to a digital voltmeter.
The digital voltmeter should measure -0.6 Vdc. If the signal is not present, refer to highband RF loop
troubleshooting.
2. Turn the signal generator’s RF power on and set the frequency to 1 GHz and the RF power level to
+20 dBm. Disconnect the cable from J5 of the A10 ALC (W14) and connect the cable to a digital voltmeter.
The digital voltmeter should measure -5.0 Vdc. If the signal is not present, refer to lowband RF loop
troubleshooting.
3. If the above signals are present, replace the A10 ALC.
902 Detector Level to ALC Ref
1. Turn the signal generator’s RF power on and set the frequency to 1 GHz and the RF power level to
+20 dBm. Disconnect the cable from J5 of the A10 ALC (W14) and connect the cable to a digital voltmeter.
The digital voltmeter should measure -5.0 Vdc. If the signal is not present, refer to lowband RF loop
troubleshooting.
2. Turn the signal generator’s RF power on and set the frequency to 10 GHz and the RF power level to
+20 dBm. Disconnect the cable from J3 of the A10 ALC (W15) and connect the cable to a digital voltmeter.
The digital voltmeter should measure -0.6 Vdc. If the signal is not present, refer to highband RF loop
troubleshooting.
3. If the above signals are present, replace the A10 ALC.
903 Level Test
1. Turn the signal generator’s RF power on and set the frequency to 10 GHz and the RF power level to
+20 dBm. Disconnect the cable from J3 of the A10 ALC (W15) and connect the cable to a digital voltmeter.
the digital voltmeter should measure -0.6 Vdc. If the signal is not present, refer to highband RF loop
troubleshooting.
2. If the above signal is present, replace the A10 ALC.
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