4-32 Service Guide N5242-90001
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5242A
Checking the A5 and A8 Source Outputs
1. Refer to the block diagram at the end of this chapter and to “Top Cables, All Cables—All
Options” on page 6-16. Locate the flexible cables W3 and W9 at the A5 source 1 board or
cables W5 and W7 at the A8 source 2 board.
2. Disconnect the cables, one at time, that are connected to cables W3 and W9 or cables
W5 and W7, from the source board to be checked.
3. Connect the spectrum analyzer to the open connector at the end of the cable that
connects to the source board to be checked.
4. Set the network analyzer for a 2 GHz CW frequency and observe the spectrum analyzer
measurement.
• The spectrum analyzer should measure a signal at 2 GHz (plus the 7.61 MHz offset).
5. If the signal is not present and the signals are present from “Checking the A4 and A13
Source Synthesizer Outputs,” replace the appropriate source board. Refer to “Removing
and Replacing the A4–A13 Boards” on page 7-14.
6. If the signal is present, reconnect all cables, and then continue with “Checking the
Signal Separation Group” on page 4-33.
To Next Page
Loading...
