Error Message Disable Control - HP 8901B Operation And Calibration Manual

Model
8901B
Operation
Error Message Disable Control
FUNCTIONS
DISABLE ERROR, Special h c t i o n 8 (Error Message Disable and Enable)
DESCRIPTION
Error Messages are one means the Modulation Analyzer uses to safeguard measurement integrity. When
the instrument senses a potential error-causing situation, an Error Message code is displayed
to
alert
the user of the condition. The Error Message code indexes an Error Message, which describes the
current errors. (Refer
to Error Message Summary
on page 3-247.)
When the Modulation Analyzer is in its Automatic Operation mode, Error Messages are selectively
enabled, depending on the measurement being made,
to
assure the broadest range of calibrated
measurements. Some Error Messages, however, can be selectively disabled or enabled using Special
Function 8. Disable Error performs the same function as Special h c t i o n 8.7 (Errors 01, 02, 03, and
04 disabled).
Most combinations of Errors 01 through
04
can be disabled or enabled by the operator
to
customize
the behavior of the instrument to meet a particular set of measurement requirements. Special finction
8.8 (Errors 01 through 04 enabled) sets up the Modulation Analyzer as a calibrated receiver. (Refer to
"COMMENTS" for further elaboration.)
The following table lists the Error Messages conveyed by Errors 01 through 04
Error Message
Signal out of IF range
Input circuits overdriven
Input circuits underdriven
04 Audio circuits overdriven
The following table lists the errors that are automatically disabled in each Measurement mode:
Measurement Selected
AM
FM
RF POWER
FREQ
AUDIO FREQ
AUDIO DlSTN
IF LEVEL
TUNED RF LEVEL
FREQ ERROR
SINAD (Special Function 29.0
EXT AUDIO RMS LEVEL (Special Function 30.0)
LO FREQUENCY (Special Function 33.0)
IF FREQUENCY (Special Function 34.0)
RF LEVEL (Special Function 35.0)
@ I
Errors Disabled When in
Automatic Selection Mode
(Special Function 8.0)
None
None
None
01, 04
02, 03, 04
None
None
01, 02, 03, 04
02,03,04
01,
02, 03, 04
None
None
01, 02,
03,
04
01,02, 03, 04
01.04
Error Message Disable Control
3-233