Anritsu 682XXB - Manual (Page 216)

5-50 682XXB/683XXB MM
Error 139 32-40 GHz SDM Section Failed
Error 140 25-32 GHz SDM Section Failed
Error 141 20-25 GHz SDM Section Failed
Description: Each of these error messages indicates a failure in a
switched doubler filter path within the SDM. The 682XXB/683XXB
will not produce an RF output in the frequency range of the failed
switched doubler filter path.
Step 1. Set up the 682XXB/683XXB as follows:
a. 682XXB Setup:
CW/SWEEP SELECT: Step
F1: 2.000 GHz
F2: 40.000 GHz
Number of Steps: 400
L1: +1.00 dBm
683XXB Setup:
CW/SWEEP SELECT: Analog
F1: 2.000 GHz
F2: 40.000 GHz
Sweep Time: 0.100 Sec
L1: +1.00 dBm
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 PIN switch drive voltages
at A9TP11, A9TP15, and A9TP24 (shown in Table 5-23).
G If the PIN switch drive voltages are correct, replace the
SDM.
G If the PIN switch drive voltages are not correct, replace
the A9 PCB.
Table 5-22. Error Messages 138, 139, 140, and 141 (2 of 2)
TROUBLESHOOTING
TROUBLESHOOTING TABLES
Test Point
Active Frequency
Range
Active
Voltage
Inactive
Voltage
A9TP9 0.01 to 20 GHz +20V –15V
A9TP11 20 to 25 GHz +20V –15V
A9TP15 25 to 32 GHz +20V –15V
A9TP24 32 to 40 GHz +20V –15V
Table 5-23. SDM PIN Switch Drive Voltages