Agilent Technologies 85032B/E 50 Specifiche Pagina 43

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8712ET/ES and 8714ET/ES Performance Checks
RF Network Analyzers Performance Test Software
Service Guide 1-35
PT11: Crosstalk
This test measures the crosstalk between the output signal path and the input signal path
inside the analyzer at maximum specified output power level. The test makes a
narrowband transmission measurement with shorts connected to both test ports.
Test Process.Attach a short to each test port on the analyzer. Preset the analyzer and set
the power level to the maximum power specified for the particular model/option
configuration of the instrument. Set the system bandwidth to fine (15 Hz) and the
averaging factor to 4. Enable averaging. Check the trace; it must be below the crosstalk
limit given in the specification. For example, if the specification is 80 dB, the trace must be
below80 dB.
For ES models, repeat the test for a reverse transmission (S12) measurement.
Specification Verified.This test verifies the “System Performance, Uncorrected:
Crosstalk” specification inTable1-6on page1-55 andTable1-7on page1-56.
If This Test Fails.Check cabling and shielding on the A4 source board and the A5
receiver assembly.
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