Listed below, in alphabetic order, are some common problems and their solutions. To deal with problems associated with a specific instrument (like the computer, printer, or network analyzer) refer to its manual.
Cables should be held in the same position during measurement as during calibrations. They should be given time to stabilize prior to calibration. Excessive flexing can result in measurement inaccuracies. With waveguide systems, allow the test port (usually port 2) to waveguide flange cable to maintain the same position (don’t flex or bend it) long enough to minimize phase changes.
Non-repeatable measurements may be the result of excess cable flexing, poor or inconsistent contact of the MUT with the surfaces of the waveguide or coaxial sample holder, non-perpendicular sample faces, or changing location of the sample within the sample holder.
Program won’t run usually results from improper installation.
Details appear in Additional Equipment Needed