
8712ET/ES and 8714ET/ES Performance Checks
RF Network Analyzers Performance Test Software
Service Guide 1-33
PT09: Harmonics
This test uses a spectrum analyzer to measure harmonics on the network analyzer output
at 18 different frequencies. Harmonics above 2.9 GHz are not checked.
Test Process.Connect the output of the analyzer to the spectrum analyzer with a high
quality type-N cable. Step the analyzer through 18 CW frequencies, ranging from 0.3 MHz
to 1440 MHz. Set the analyzer power to the maximum specified level for each frequency.
Check all harmonics below 2.9 GHz for conformance to the specification. When this test is
performed under computer control, the time bases of the two instruments are connected
and the network analyzer’s Ext Ref function is turned on.
Specification Verified.This test verifies the “Test Port Output: Signal Purity:
Harmonics” specification inTable1-8 starting on page1-57.
If This Test Fails.If the harmonics test fails, perform the“Source Power Correction,
Adjustment #104” on page 2-15. The most likely cause of a harmonics test failure is the A4
source assembly.
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