Service Guide E8364-90038 4-45
PNA Series Microwave Network Analyzers Troubleshooting
E8362C, E8363C, E8364C Measurement System Troubleshooting
4. The spectrum analyzer should measure a signal at 5 MHz.
5. If no 5 MHz signal is present, replace the A10 frequency reference board. Refer to “Removing and
Replacing the A6, A8, A9, and A10 Boards” on page 7-18.
6. If the 5 MHz signal is present, reconnect cable W115, and then continue with “Checking the A9
Fractional-N Synthesizer Band 0 and 1 Output” on page 4-45.
Checking the A9 Fractional-N Synthesizer Band 0 and 1 Output
Perform this procedure if you observe a problem in band 1 of the frequency offset receiver.
1. Refer to the block diagram at the back of this chapter and to “Top Cables–All, All Options Including 080”
on page 6-20. Locate semi-rigid cable W92, at the A9 fractional-N synthesizer board.
CAUTION Be careful not to damage the center pins of the semi-rigid cable. Some flexing of the cables
is necessary to measure the output.
2. Disconnect W92 from A9J101.
3. Connect the spectrum analyzer to A9J101.
4. Set the network analyzer for a 500 MHz CW frequency and observe the spectrum analyzer measurement.
• The spectrum analyzer should measure a signal at 508.33 MHz.
5. If the 508.33 MHz signal is not present and the 5 MHz reference signal is present from “Checking the
A10 5 MHz Reference Output, All Bands,” replace the A9 fractional-N synthesizer board. Refer to
“Removing and Replacing the A6, A8, A9, and A10 Boards” on page 7-18.
6. If the signal is present, reconnect cable W92, and then continue with “Checking the A9 Fractional-N
Synthesizer Band 2 Output” on page 4-45.
Checking the A9 Fractional-N Synthesizer Band 2 Output
Perform this procedure if you observe a problem in band 2 of the frequency offset receiver.
1. Refer to the block diagram at the back of this chapter and to “Top Cables–All, All Options Including 080”
on page 6-20. Locate semi-rigid cable W91, at the A9 fractional-N synthesizer board.
CAUTION Be careful not to damage the center pins of the semi-rigid cable. Some flexing of the cables
is necessary to measure the output.
2. Using a 5/16-inch torque wrench, disconnect W91 at A9J106.
3. Connect the spectrum analyzer to A9J106.
4. Set the network analyzer to a CW frequency of 1 GHz.
• The spectrum analyzer should measure a signal at 1.008 GHz.
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