Keysight Technologies N5261A, User'S And Service Manual

Page: 53 / 99

Keysight N5261/62A User’s & Service Guide 47
Installation & System Operation
System Level Troubleshooting
If the System Operation Verification procedure fails, perform the
following procedure to isolate the problem.
Refer to the Keysight PNA Series: firmware, Upgrades, and Support at:
http://na.support.keysight.com/pna for further information.
To request service, please contact your local service center. In the US, call
800-829-4444. For a listing of service centers worldwide, please visit us at
http://www.keysight.com/find/service.
1. Confirm that each piece of equipment is turned on
and that
all analyzer
and m odule connections are correct.
2. Verify that the analyzer has the correct options for Millimeter mode
operation. Refer to “Test Set Accessories” on page 4 .
3. Verify that the analyzer is in Millimeter mode for the waveguide band of
the modules used.
4. If the receiver levels (A,B, C, D or R 1) fail the Banded System check refer
to the Measure, Test and Reference graphs in the documentation included
with the module. If the REF IF and Test IF levels are low connect the REF IF
and TEST IF cables directly from the mm-wave module to the analyzer’s
rear panel IF Inputs. If the levels are correct proceed to
step 7
. If the levels
are low continue with
step 5
.
5. If one of more of the ports are working, substitute the mm-module with a
known working module. If the port is still not working measure the RF Out
and LO Out power from the test set’s RF Out and LO Out connectors at the
end of the cables. Replace or substitute the cables if the loss is greater
than the cable specification. If the cables are not the cause proceed to
step 7
.
Turn off the test set before disconnecting or reconnecting the modules.
6. Confirm that the analyzer is working properly by disconnecting it from the
test set and performing an Operation Verification (OP VER) in the Help
menu.
7. If the analyzer is operating properly, verify the test set by performing the
“Troubleshooting the Test Set” on page
63
.
8. If the analyzer, test set and m odules are functioning, but the system is not
operating properly, contact “Keysight Support, Services, and Assistance”
on page 9 2 .