1
Getting Started
36
Keysight 53147A/148A/149A Operating and Programming Guide
The Display Annunciators at a Glance
Ch 12
Rel Freq
Offset
Avg On
Rel Pwr
Offset
dB
dBm
Watts
mW
uW
%
Ext Ref
Error
Shift
Hold
Rate Rmt SRQ
GHz
MHz
kHz
Hz
nW
Pwr Ref
Annunciator
Description
Ch 1 or Ch 2
Indicates which channel is selected to measure an input signal.
Freq
Indicates that the value displayed is a frequency reading.
Rel Freq
The displayed frequency value is relative to a previously stored value.
Freq
Offset
The displayed frequency value is offset by a previously entered frequency value.
Avg On
The displayed measurement value is the result of a number of individual
measurements that have been averaged.
Pwr
The instrument is set to measure Power (Power Meter is on).
Rel Pwr
The displayed power measurement is relative to a previously stored power value.
Pwr Offset
The displayed power value is offset by a previously entered power value.
dB, dBm, Watts,
mW,
m
W, nW, %
Indicates the unit of measurement for the currently displayed power value.
Provides a real-time analog representation of the Power measurement (intended for
peaking and similar procedures).
Ext Ref
The Counter is using an external reference Timebase for frequency measurements.
Hold
Indicates the instrument is in Hold (single-measurement) mode.
Rmt, SRQ
Shows the current state of the GPIB interface
(Rmt = Remote operation via GPIB; SRQ = Service ReQuest).
Error
Indicates that a front-panel key command is unacceptable in the current context.
Shift
Indicates that all front-panel keys are redefined to the function printed above the
key.
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