Agilent Technologies 4291B, Быстрый старт

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B
Maintenance
This appendix provides information on performance verication,
repair , replacement of Center Conductor Collet, line voltage setting
changes , and fuse replacement.
P erformance
V erication
The 4291B requires periodic performance verication. How often
you verify performance depends on the operating and environmental
conditions . The recommended cycle is at least once a year . The
performance verication procedure is described in the Service
Manual. F or the customer who does not have the test instruments
required for performance verication or who wants to save time ,
Agilent T echnologies provides calibration service . F or detailed
information, contact the nearest Agilent T echnologies oce .
Repair
When your analyzer seems defective , the following section of
\P ossible Problems and Their Solution " will help you to determine
what to do . If you can not nd a solution, contact the nearest
Agilent T echnologies oce . If you send the instrument to HP , include
information about the trouble symptom. Send all of your analyzer ,
including the mainframe , test station, test head and calibration kit (0
, 0 S, 50 terminations and low-loss capacitor).
P ossible Problems and
Their Solution
Analyzer does not turn on:
Check the fuse and the voltage selected.
Measurement trace is not stable:
1. Check the test station, the test head, and the xture connection.
2. Check the center conductor collet of the APC-7 connector on
the test head, the 50 termination, and the low-loss capacitor .
If a collet is defective , replace it (see \Replacement of Center
Conductor Collet").
Measurement trace is displayed as a line or is not smooth:
The number of measurement points may be too small.
Maintenance B-1