HP E4418B Programming Guide

prog.book : ch2meas.fm 25 Mon Feb 15 09:24:37 1999
MEASurement Instructions
FETCh[1|2][:SCALar][:POWer:AC]:RELative? [<expected_value>[,<resolution>[,<source list>]]]
HP E4418B/E4419B Programming Guide 2-25
Example
1. The mnemonic DEF means DEFault. This is not equivalent to the DEFault
parameter used in the command sub-systems. The parameters must be entered in
the specified order. If parameters are omitted, they will default from the right.
The parameter DEFault is used as a place holder. Specifying
DEF leaves the
parameter value unchanged.
2. When the measurement result is linear this parameter represents the number
of significant digits. When the measurement result is logarithmic 1 to 4
represents a resolution of 1, 0.1, 0.01 and 0.001 respectively.
resolution A numeric value for the resolution.
If it is unspecified the current
resolution setting is used. If a
value is entered it should
correspond to the current
resolution setting otherwise an
error occurs.
1 to 4
2
1.0, 0.1, 0.01, 0.001
DEF
1
source list This is the channel on which the
command is implemented. If
unspecified the current window
setup is used. However, on the
HP E4419B, if the window shows a
ratio or difference measurement,
the upper window defaults to
channel A and the lower window to
channel B.
(@1)
(@2)
FETC1:REL? DEF,2,(@2) This command queries the upper
window’s relative measurement of
channel B, using the current
sensor range and a resolution
setting of 2.
Item Description/Default Range of Values

HP E4418B Specifications

General

Brand	HP
Model	E4418B
Category	Measuring Instruments
Language	English