Ref If Or Test If - Keysight Technologies N5290/1A PNA Series Service Manual

N5290/91A Troubleshooting
N5292A Test Controller Troubleshooting
2. If none of the port are working, verify the output of the LOPA. It is only
necessary to verify the output of one port on the LOPA. If you find incorrect
power levels and suspect a component has failed verify the DC voltages
referencing Table 2-3 on page 2-16 and Figure 2-7 on page 2-16. Replace
the failed component.

REF IF or Test IF

If the REF IF or Test IF fails the Operation Verification test the following
procedure can be used to verify the failure. The procedures assumes power
supplies and front panel LEDs are working. Suspect the A5 test set
mother-board (TSMB) or coaxial cables. Refer to
Motherboard (TSMB)" on page
1. N5292A 2-port - Verify that the front panel Port 1 & 2 REF and IF coax
cables are properly connected to the rear panel (A, B, C and D) and
insertion loss is not >−2.5 dB. Replace the coax cable if damaged. If
damaged, refer to
System" on page
Verify the front panel integrated connector pins are not damaged. If
damaged refer to
Boards" on page 7-29
Integrated Connectors/Cables" on page
Panel Integrated Port Connector" on page
Verify the blue wires supplying power to the integrated connectors are not
damaged. If damaged, refer to
and Subpanel Assemblies" on page 7-10
the Front Panel Integrated Connectors/Cables" on page
2. N5292A 4-port - Verify that the front panel Port 1 & 4 REF and IF coax
cables and rear panel coax cables (A, B, C, D and R) are properly
connected to the TSMB. Verify that the insertion loss is not >−2.5 dB.
Replace the coax cable if defective. Refer to
Option 200/400 from the System" on page
Verify the front panel integrated connector pins are not damaged. If
damaged refer to
Boards" on page 7-29
Integrated Connectors/Cables" on page
Verify the blue wires supplying power to the integrated connectors are not
damaged. If damaged, refer to
and Subpanel Assemblies" on page 7-10
the Front Panel Integrated Connectors/Cables" on page
3. If the coax cables are properly connected and the insertion loss is correct,
replace the A5 TSMB. Refer to
Motherboard" on page
4-28
4-9.
"Removing the N5292A Option 200/400 from the
7-6.
"Removing and Replacing the Subpanel PCA Sensor
and "Removing and Replacing the Front Panel
"Removing and Replacing the Front Panel
"Removing and Replacing the Subpanel PCA Sensor
and "Removing and Replacing the Front Panel
"Removing and Replacing the Front Panel
"Removing and Replacing the A5 Test-Set
7-20.
Keysight N5290/1A Service Guide
"Verifying the A5 Test Set
7-31. See also "N5292A Front
3-40.
and "Removing and Replacing
7-31.
"Removing the N5292A
7-6.
7-31.
and "Removing and Replacing
7-31.