Agilent Technologies E8362C Service Manual page 126

Troubleshooting
Measurement System Troubleshooting
5. If this signal is not present, replace the A9 fractional-N synthesizer board. Refer to
Replacing the A6, A8, A9, and A10 Boards" on page
6. If the signal is present, leave the spectrum analyzer connected to A9J106 and continue with
the A9 Fractional-N Synthesizer Bands 3 through 25 Output" on page
Checking the A9 Fractional-N Synthesizer Bands 3 through 25 Output
Perform this procedure if you observe a problem in bands 3 through 25 in all receivers.
1. Set the network analyzer to a CW frequency of 2 GHz.
• The spectrum analyzer should measure a signal at 2.008 GHz.
2. If the signal is not present, replace the A9 fractional-N synthesizer board. Refer to
Replacing the A6, A8, A9, and A10 Boards" on page
3. If the signal is present, reconnect cable W91, and then continue with
Output" on page 4-46.
Checking the A12 Source 20 Output
Perform this procedure if you observe a problem in any band and all signals from the A9 fractional-N
synthesizer are present.
1. Refer to the block diagram at the end of this chapter and to
on page 6-20. Locate the semirigid cables W93 at the A12 source 10 output.
CAUTION Be careful not to damage the center pins of the semirigid cable. Some flexing of the cables is
necessary to measure the output.
2. Using a 5/16-inch torque wrench, disconnect W93 at the output of the A12 source 10 board.
3. Connect the spectrum analyzer to the A12 source 10 board.
4. Set the network analyzer to a CW frequency of 1 GHz.
• The spectrum analyzer should measure a signal at 1 GHz.
5. If the signal is not present, replace the A12 source 20 board. Refer to
Source 20" on page 7-22.
6. If the signal is present, reconnect cable W93, and then continue with
Offset Receiver Band 0 Output" on page
4-46
PNA Series Microwave Network Analyzers
7-18.
7-18.
"Top Cables–All, All Options Including 080"
4-47.
E8362C, E8363C, E8364C
"Removing and
"Checking
4-46.
"Removing and
"Checking the A12 Source 20
"Removing and Replacing the A12
"Checking the A13 Frequency
Service Guide E8364-90038