682XXB/683XXB MM 5-45
Unleveled with no/low output power:
Step 1. Set up the 682XXB/683XXB as follows:
a. 682XXB Setup:
CW/SWEEP SELECT:Step
F1: 0.010 GHz
F2: 20.000 GHz
Number of Steps: 400
L1: +1.00 dBm
683XXB Setup:
CW/SWEEP SELECT:Analog
F1: 0.010 GHz
F2: 20.000 GHz
Sweep Time: 0.100 Sec
L1: +1.00 dBm
b. LEVEL/ALC SELECT:ALC Mode
Leveling Menu: Internal
Step 2. Connect the X input of an oscilloscope to the 682XXB/
683XXB rear panel HORIZ OUT connector.
Step 3. Using the oscilloscope, check the switched filter bias volt-
ages at A13TP4 and A13TP9. The bias voltage at A13TP4
should be +6 volts; the bias voltage at A13TP9 should be +8
volts. If the 682XXB/683XXB has a SDM installed, also
check for a +20 volt PIN switch drive voltage at A9TP9.
If the bias and the PIN switch drive voltages are correct,
go to step 4.
If the bias voltages are not correct, replace the A13 PCB.
If the PIN switch drive voltage is not correct, replace the
A9 PCB.
Step 4. Connect a 562 Scalar Network Analyzer to the 682XXB/
683XXB as follows:
a. Connect the 682XXB/683XXB AUX I/O to the 562 AUX
I/O.
b. Connect the 562 DEDICATED GPIBto the 682XXB/
683XXB IEEE-488 GPIB.
c. Connect the RF Detector to the 562 Channel A Input.
Table5-20. Error Messages 128, 129, 130, 131, 132, 133, 134, and 135 (5 of 8)
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