User`s guide

Chapter 2 2-19
Operation
Operation
Operator’s Check
Description
The operator’s check consists of two softkey-initiated tests:
Port 1 Op Chk and Port 2 Op Chk.
A short is connected to Port 1 (Port 2, Port 3) to reflect all the source
energy back into the analyzer for an S
11
(S
22,
S
33
) measurement.
The first part of Port 1 Op Chk checks the repeatability of the transfer
switch. An S
11
measurement is stored in memory and the switch is
toggled to Port 3, then back to Port 1 where another S
11
measurement is
made. The difference between the memory trace and the second trace is
switch repeatability.
The remaining parts of both tests exercise the internal attenuator in
5 dB steps over a 55 dB range. The resulting measurements must be
within a limit testing window to pass the test. The window size is based
on source and receiver specifications.
The operator’s check determines the following:
• The source is phase locked across the entire frequency range.
• All three samplers are functioning properly.
• All transfer switches and receiver switches are operational.
• The attenuator steps 10 dB at a time.
Required Equipment
Analyzer warmup time: 30 minutes
Short (m) Part of the 85032B calibration kit