Agilent Technologies 85032B/E 50 Dokumentacja Strona 40

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Performance Checks 8712ET/ES and 8714ET/ES
Performance Test Software RF Network Analyzers
1-32 Service Guide
If This Test Fails. If directivity (uncorrected) fails, the most likely cause is a defective
coupler: the A coupler for the forward direction, or the B coupler for the reverse direction.
Source match depends mostly on hardware in the A5 receiver assembly. Load match is
solely dependent upon the A5 receiver assembly. If either of these two tests fail, first
inspect the two type-N connectors for damage, especially on 75 instruments. If load
match fails, also suspect the A5 receiver assembly limiter or transfer switch.
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