Remote Control - Commands
NRP2
211User Manual 1173.9140.02 ─ 07
In compliance with SCPI 1999.0, different results can be queried with FETCh without
having to restart a measurement. This is the case if only the keywords for the calcula-
tion function (e.g. :RATio:RELative) is changed.
In all other cases, e.g. changing the measurement function, an SCPI error (-221, Set-
ting conflict) is returned and the command aborted.
Example:
Valid command sequence:
FETCh:
TSLot:SUM? 577us,8,0,0
FETCh:TSLot:SUM:RELative? 577us,8,0,0
invalid command sequence:
FETCh:BURSt:SUM? 0,0,0
FETCh:TSLot:SUM? 577us,8,0,0
READ:...?
The READ:...? command starts a measurement without further configuration and
returns the measurement result. The parameter list is compared to the current settings
before the measurement is started. If the list does not agree, an SCPI error (-221, Set-
ting conflict) is returned and the command is aborted. Apart from this check, READ cor-
responds to the program message INIT:IMM; FETCh[1..8]:...?.
MEASure:...?
The MEASure:...? command combines CONFigure and READ.
Refer to annex chapter A.4, "Programming Measurements", on page 379 for applica-
tion examples to the high level measurement commands.
6.4.2 Basic Commands FETCh? and READ?
FETCh?
The command FETCh? without further keywords and parameter list has a special
meaning. While omitting parameters of the parameter list normally means that default
values are used and checked, the current measured value under FETCh? is supplied
when it is valid. If a measured value is not yet available, processing is suspended until
a valid result is available.
Usage: Query only
READ?
The READ? command without further keywords and parameter list can be compared
with FETCh?. READ? starts a measurement and returns a measured value without
checking the current settings.
High-Level Measurement Commands (CONFigure, MEASure, READ and FETCh)
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