Range Hold - HP 8901B Operation And Calibration Manual

Model 8901B
1
2
3
5
6
7
8
10
Operation
RF Input Attenuation
Audio Range
RF and IF Filters
Audio Detector Response
AM ALC Response
RF Frequency Resolution
Error Message Disable
RF Power Range
AUTO TUNING
Range Hold
FUNCTIONS
RANGE HOLD
DESCRIPTION
The Range Hold function freezes the current ranges being used by the Modulation Analyzer. This
function, the converse of Automatic Operation, disables automatic tuning and sets Special b c t i o n s
prefixed 1,2,3, 7,9, and 10
to
the current range settings. The following functions are not affected by
Range Hold High-pass and Low-pass Filters, FM De-emphasis, Measurement Detectors, and Display.
Special Functions prefixed 1 through 10 that are already manually set are unaffected. The table below
summarizes the effect of the Range Hold feature:
Effect of RANGE HOLD
on Functions
Special Function
Prefix
Measurement Function
Holds setting
Holds setting
Holds setting
No effect
No effect
Holds setting
No effect
Holds setting
Selects Manual Tuning
PROCEDURE
To hold instrument settings in a specific measurement state, set the Modulation Analyzer as desired,
then select RANGE HOLD.
To exit the Range Hold mode, select RANGE HOLD a second time or select AUTOMATIC
OPERATION.
HP-IB PROGRAM CODE
Automatic Ranging =
GO
RANGE HOLD =
G1
Range Hold 3-213