Agilent Technologies 85032B/E 50 Specifikace Strana 33

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8712ET/ES and 8714ET/ES Performance Checks
RF Network Analyzers Performance Test Software
Service Guide 1-25
PT02: Gain Compression
This test measures narrowband gain compression at or near the maximum rated input
levels for the analyzer.
Test Process.Set the power output to the lesser of +10 dBm or the maximum value for
the analyzers model and option configuration. Set the system bandwidth for narrow
(250Hz). Perform an enhanced-response calibration for a transmission measurement.
Measure transmission on a through cable over the full frequency range of the analyzer.
Insert a 20dB fixed attenuator and measure transmission again. The difference is
compared to the known insertion loss of the calibrated 20 dB fixed attenuator to determine
gain compression. Gain compression must be less than the limit stated in the specification.
This test process is performed once for an ET model analyzer and twice for an ES model
(both forward and reverse directions).
Specification Verified.This test verifies the “Test Port Input: Maximum Input Level”
specification inTable1-9 starting on page1-63. In some cases, the test must be performed
at a power level less than the +10 dBm level indicated in the specification.
If This Test Fails.If this test fails, replace the PC board on the A5 receiver assembly.
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