HP 4395A - Verify Operations

VERIFY OPERATIONS
The measurement problem can be caused by improper operation. Conrm that all operations,
connections and control settings, etc., are properly made during the measurement. For detailed
information about proper operations, see the following manuals:
Operation Manual (p/n 04395-90000)
Programming Manual (p/n 04395-90000)
Some examples of the typical operation errors are shown in the following paragraph.
Using 75  Connectors with 50  Connectors
Do not use 50  connectors with 75  connectors; their center conductors are dierent
diameters. Using a 50  male connector with a 75  female connector will destroy the female
connector.
Large Spurious Signals in the Spectrum Measurement
Large spurious signals around the fundamental signal can be caused by an input signal level
that is higher than the reference level. Reducing the input signal level or setting the reference
level higher can solve the spurious signal problem.
Odd Appearing Opens and Shorts in the Network Measurement
Opens and shorts can appear as short lines (rather than the expected points) on a Smith
Chart. This is a result of some shorts and opens being oset. See the calibration kit manual
to determine the oset. To verify the opens and shorts, see Verify Shorts and Opens in the
Inspect the Calibration Kit procedure later in this chapter.
9-2 Accessories Troubleshooting