R&S NRP2 - Page 400

Programming Measurements
R&S
®
NRP2
382User Manual 1173.9157.02 ─ 03
Measurement function Output unit
:SWR O
:RLOS DB
:REFL O
The UNIT commands affect the parameters of the following commands:
CALC:LIMit:UPPer, CALC:LIMit:LOWer, CALC:RELative, DISP:METer:UPPer
and DISP:METer:LOWer.
C.1.6 Division of MEAS?
MEAS? can be divided into other high-level measurement commands.
MEAS?
⇔
CONF [<parameters list>]
READ? [<parameters list>]
The CONF command configures the measurement, whereas READ? starts the measure-
ment, and calculates and provides the result.
This division offers two advantages:
●
The measurement has to be configured only once and several measurements (with
several READ? commands) can be performed in succession. This means better per-
formance as compared to measurements performed with MEAS?, since the time for
configuring the measurement is only used once.
●
After CONF, settings can be adapted to user's requirements by means of low-level
commands (see below).
If a list of parameters is indicated for the READ command, it must correspond to the list
for the preceding CONF command.
After a measurement has been completed, i.e. the data from the sensors is available, it
is sometimes interesting to evaluate this data several times without starting a new mea-
surement each time. Since this is not possible with the above commands, the READ?
command can be replaced by the INIT and FETCh? commands.
READ?
⇔
INIT
FETCh? [<list of parameters>]
FETCh? evaluates existing data if the data is valid. FETCh? may select another calcula-
tion function if the measurement can be evaluated with the available measured data.
Measuring with high-level commands