HP 8753E Service Manual

Step 2. 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) to reflect ah the source energy back into
the analyzer for an SII (SZZ) measurement.
The first part of Port I Op Chk checks the repeatability of the transfer switch.
An SI1 measurement is stored in memory and the switch is toggled to port 2 and
then back to port 1 where another SII 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 dEI steps
over a 55 dB range.
The resulting measurements must fall within a limit testing window to pass the
test. The window size is based on both source and receiver specifications.
The operator’s check determines that:
n The source is phase locked across the entire frequency range.
n All three samplers are functioning properly.
n The transfer switch is operational.
n The attenuator steps 5 dB at a time.
Required Equipment and lbols
Short . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . part of the HP 85031B calibration kit
Analgzm warm-up time: 30 minutes.
Procedure
1. Disconnect all devices, peripherals, and accessories (including adapters and
limiters) from the analyzer.
3. The display should show TEST 21 Port 1 Op Chk in the active entry area.
44 Start Troubleshooting Here

HP 8753E Specifications

General

Brand	HP
Model	8753E
Category	Measuring Instruments
Language	English