Agilent Technologies 85032B/E 50 Dokumentacja Strona 18

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Performance Checks 8712ET/ES and 8714ET/ES
Performance Test Software RF Network Analyzers
1-10 Service Guide
Performance Test Software
The performance test software provides automated tests for verifying that the analyzer
meets its published specifications with greater than a 95% confidence level. The
performance test software must be run on an external controller running HP BASIC (the
analyzer’s internal IBASIC cannot be used). The performance tests can be considered a
check of the overall calibration of the instrument. Unlike the adjustments described in
Chapter 2, the performance test software only checks the performance of the analyzer. No
changes are made to the calibration constants stored in the instrument. When a
performance test fails, usually one or more adjustments should be performed to attempt to
improve the performance before repairing or replacing hardware.
Results of the automated performance tests can be printed out at any time. They include
all specifications, limits, and uncertainties. Although no manual tests are provided, each of
the automated tests is described in enough detail to allow a knowledgeable technician to
perform all needed tests in an accurate manner. See “Performance Test Notes and
Descriptions” on page 1-23.
The printed test results list uncertainties for each measurement. These uncertainties are
for reference only, and are not taken into consideration when making pass/fail
determinations. The listed uncertainties do not depend on the level of the measured signal;
they assume a signal at the specified level. Generally, uncertainties assume published
specifications for all instruments and devices. For the 110 dB step attenuator and the
20 dB fixed attenuator, device-specific calibration data is required.
Performance test record cards are not provided; the printed results of the automated
performance testing serve as the test record for this product. See “ ” in
“Using the Program” on page 1-19 for details on pass/fail indications for individual tests.
When a test report contains no “FAIL” indicators, an analyzer is considered to have passed
the performance tests.
Many instrument users require a periodic, documented check of instrument performance.
This is usually referred to as a “periodic calibration.” Successful completion of the
performance tests (no “FAIL” indicators) should suffice for the requirements of a periodic
calibration. Do not confuse the term “periodic calibration” with the terms “user
calibration” or “default calibration” which both refer to measurement calibrations utilized
by operators when measuring devices with the analyzer.
Required Software and Controller
The performance test software is written for an HP 9000 Series 200, 300, or 700
workstation (or equivalent), running HP BASIC 5.1 or greater. There is also a version
available to run on a PC under HP BASIC for Windows with a GPIB interface card.
Operation is essentially identical to that described for an HP workstation computer.
PRINT RESULTS
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