
8712ET/ES and 8714ET/ES Performance Checks
RF Network Analyzers Performance Test Software
Service Guide 1-21
Test Selection Menu
The test selection menu can be divided into three main categories:
• eleven automated analyzer performance tests
• four utility procedures
• two external broadband detector performance tests (HP/Agilent 86200B or 86201B)
Data for each of the eleven performance tests is archived upon completion.
The four utility programs are described as follows:
1. utility allows you to enter a serial number into the analyzer. This
may be required after some types of repairs.
CAUTION Enter the number carefully; it cannot be easily changed once it has been
entered. If a mistake is made, it will be necessary to contact an Agilent
Technologies service center for correction.
2. The is a cyclical stress test designed to show any weakness in
the mechanical (and therefore, electrical) integrity of the built-in attenuator. (The
attenuator is standard equipment on ES models and is supplied as Option 1E1 on ET
models.) For each cycle, the attenuator card is switched in and out with each resulting
trace measured. Minimum and maximum excursions are then noted. The test is
performed at a low frequency and a high frequency. The number of cycles is selected by
the user. A minimum of twenty-five is recommended. One hundred cycles will take
about five to ten minutes depending upon computer speed. There is no pass/fail
indication but trace variances of more than 0.1 dB should warrant further investigation
or increased monitoring for signs of wear.
3.
(external) is a utility file that uses a power meter to
measure the actual insertion loss at 30 MHz for the 110 dB step attenuator. This
routine should only be used as a last resort if no other method of obtaining data is
available. Generally the attenuator should be measured using one of the following
methods:
• sending the device to a calibration standards lab
• measuring the device with an 8753D with full two-port correction
• measuring the device with an 8902A Option 050
4. is similar to the utility, but is used for
characterizing the 20 dB pad.
NOTE The listed uncertainties shown on the test results assume that one of these
three choices was used and not the built-in routine, which has a much higher
degree of uncertainty.
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