HP E4418B Programming Guide

prog.book : ch2meas.fm 41 Mon Feb 15 09:24:37 1999
MEASurement Instructions
READ[1|2][:SCALar][:POWer:AC]:DIFFerence? [<expected_value>[,<resolution>[,<source list>]]]
HP E4418B/E4419B Programming Guide 2-41
READ[1|2][:SCALar][:POWer:AC]:DIFFerence?
[<expected_value>[,<resolution>[,<source list>]]]
This command is only relevant for the HP E4419B power meter.
This command sets the specified window’s measurement function to
difference mode with relative mode off, aborts then initiates both channel
A and B, calculates the difference measurement result and places the
result on the bus. The result is a power based measurement and is
expressed in the units defined by UNIT[1|2]:POWer.
Note INITiate:CONTinuous must be set to OFF on both channels,
otherwise error -213, “INIT ignored” occurs. If TRIGger:SOURce
is set to BUS on either channel, error -214, “Trigger deadlock”
occurs.
Syntax
Parameters
Refer to “The Optional Parameters”, on page 2-3 for additional details on
the parameters in this command.
Item Description/Default Range of Values
expected_value
(for the
expected
power level)
The power meter ignores the
numeric value entered in this
parameter. Any value entered is
treated like DEF.
sensor dependent
DEF
1
READ
1
2
:POW
:AC
?
:SCAL
:DIFF
Space
expected_value
DEF
resolution
,
DEF
source list
,

HP E4418B Specifications

General

Brand	HP
Model	E4418B
Category	Measuring Instruments
Language	English