Keysight N9020A - Page 217

217
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Press FREQ, 5 GHz on the analyzer. Verify the voltages in Table 5-7.
If the voltages are not correct, the most probable cause is the A15 Front End
Control board.
You do not need the RF front end troubleshooting board to test out the
remaining front end hardware components. At this point it is advisable to
shutdown the analyzer and disconnect the test board and cables. Be sure to
reconnect the Low Band switch ribbon cable and the input attenuator ribbon
that were originally plugged into the Front End Control board before testing the
input attenuator and low band switch logic.
In2A −9.90
In1B +10.0
In2B +10.0
Table 5-7
Test Board
Test Point
Voltage
(VDC)
In1A +10.0
In2A −9.90
In1B −10.0
In2B +10.0
Table 5-6
Test Board
Test Point
Voltage
(VDC)