Agilent Technologies E8362A Service Manual page 118

Troubleshooting
Measurement System Troubleshooting
Checking the A21 Output, All Bands
1. Disconnect W2 from the A21 SOMA 50.
2. Connect a cable to the A21 connector and measure the output power. A power level of
−7 dBm ±5 dB indicates the A21 SOMA 50 is functioning normally.
3. If the output power level is at or below the minimum power level for the power sensor,
replace the A21 SOMA 50.
4. If the signal is present, reconnect cable W2 and continue testing at
Signal through the Signal Separation Path" on page
Checking the A10 5 MHz Reference Output
1. Refer to the block diagram at the end of this chapter and to
Locate flexible cable W31, at the A10 frequency reference board.
2. Disconnect W31 from A10J10.
3. Connect the spectrum analyzer to A10J10.
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, and A10 Boards" on page
6. If the 5 MHz signal is present, reconnect cable W31, and continue testing at
the A10 Phase Lock Reference
Checking the A10 Phase Lock Reference Output
1. Refer to the block diagram at the end of this chapter and
Locate flexible cable W32 at the A10 frequency reference board.
2. Disconnect W32 from A10J5.
3. Connect the spectrum analyzer to A10J5.
4. Verify the presence of the 8.333 MHz phase lock reference output signal.
5. If the signal is not present, replace the A10 frequency reference board. Refer to
"Removing and Replacing the A6, A8, and A10 Boards" on page
6. If the signal is present, reconnect cable W32, and continue testing at
LO at the A10 Frequency
Checking the 2nd LO at the A10 Frequency Reference
Perform this procedure if a problem is in one of the receiver channels and appears to be a
band related problem.
1. Refer to the block diagram at the end of this chapter and to
Locate the flexible cable W29 at the A10 frequency reference board.
2. Disconnect the flexible cable W29 at A10J4.
3. Connect the spectrum analyzer to A10J4.
4. Verify the presence of the 33.1667 MHz signal at A10J4.
4-40
Output".
Reference".
PNA Series Microwave Network Analyzers
E8362A, E8363A, E8364A
"Checking the
4-47.
"Top Cables" on page
7-18.
"Top Cables" on page
7-18.
"Checking the 2nd
"Top Cables" on page
Service Guide E8364-90001
6-24.
"Checking
6-24.
6-24.