Agilent Technologies 85032B/E 50 Specifiche Pagina 144

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Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES
Introduction RF Network Analyzers
4-2 Service Guide
Introduction
This chapter is divided into four main, symptom-related sections. Refer to the section that
best describes the problem you are observing, based on the results of your initial
observation.
Category 1 Failures:
dead or no response
no display
unreadable display
error message/code displayed
Category 2 Failures:
No error message, but nonfunctional measurement, for example, a through-line
transmission trace is not flat and centered around 0 dB.
Category 3 Failures:
inaccurate (but reasonably functional) measurements
Category 4 Failures:
Peripheral device problems such as:
GPIB problems
printer problems
keyboard problems
disc drive maintenance
General Notes
WARNING Always unplug the analyzer's line power before removing or
installing an assembly.
WARNING These servicing instructions are for use by qualified personnel only.
To avoid electrical shock, do not perform any servicing unless you
are qualified to do so.
CAUTION The preset power level is user-definable. When pressing , change
the power level to 0 dBm if necessary.
CAUTION If you need to disassemble the instrument, be sure to work at an antistatic
workstation and use a grounded wrist strap to prevent damage from
electrostatic discharge (ESD). SeeFigure 4-1on page4-3.
PRESET
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