Service Guide E8364-90026 4-43
PNA Series Microwave Network Analyzers Troubleshooting
E8362B, E8363B, E8364B Measurement System Troubleshooting
Checking the A21 Output (E8363B and E8364B Only)
1. Disconnect W2 from A21.
2. Connect a cable to A21 and measure the output power. A power level of a −7 dBm ±5 dB
indicates the A21 assembly is functioning normally.
3. If the output power of A21 is at or below the minimum power level, replace the A21
SOMA 50 assembly.
4. If the output power is normal, reconnect cable W2 to A21.
Checking the A10 5 MHz Reference Output, All Bands
1. Refer to the block diagram at the end of this chapter and to “Top Cables–All, All Options
Except 080” on page 6-14. 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, A9, and A10 Boards” on page 7-18.
6. If the 5 MHz signal is present, reconnect cable W31, and then continue with “Checking
the A10 Phase Lock Reference Output, All Bands” on page 4-43.
Checking the A10 Phase Lock Reference Output, All Bands
1. Refer to the block diagram at the end of this chapter and “Top Cables–All, All Options
Except 080” on page 6-14. 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, A9, and A10 Boards” on page 7-18.
6. If the signal is present, reconnect cable W32, and then continue with “Checking the 2nd
LO at the A10 Frequency Reference, All Bands” on page 4-43.
Checking the 2nd LO at the A10 Frequency Reference, All Bands
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 “Top Cables–All, All Options
Except 080” on page 6-14. 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.
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