R&S NRP2, Руководство пользователя

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Programming Measurements
R&S
®
NRP2
386 User Manual 1173.9157.02 ─ 03
Each measurement configuration should begin with the
*RST
command, which sets the
R&S NRP2 to a defined output state. The accurate settings are described in the docu-
mentation of remote control command
SYSTem:PRESet
.
The most important settings are listed below:
●
Continuous measurements are stopped (
INIT:CONT OFF
)
●
Offset correction are deactivated (
SENSe:CORRection:OFFSet:STATe
OFF
,
SENSe:CORRection:DCYCle:STATe OFF
,
SENSe:CORRection:FDOFfset:STATe OFF
).
●
All other settings of the
SENSe
system depend on the sensor used and are specified
in the corresponding manual.
●
The first 4
CALCulate
blocks are set to sensors 1 to 4 (
CALCulate<n>:MATH
"(SENSn)"
).
●
The values are measured as absolute values (
CALulate:RELative:STATe OFF
).
●
Logarithmic units are used (
UNIT:POWer dBm
and
UNIT:RATio dB
).
C.4.1 The simplest measurement
The fastest way to obtain a result is to use the following sequence of commands
*RST
INIT
FETCh?
Normally,
*RST
will set the "ContAv" mode. The concept of smart-sensor technology
provides that each sensor determines the reset values of the assigned
SENSe
and
TRIGger
block. Thus, another mode than ContAv may come after
*RST
with future sen-
sors. Information is provided in the operating manual of the sensor used.
INIT
initiates the measurement. After
*RST
, the trigger system is set to "straight through"
(
TRIG:SOUR IMM
) so that the trigger system state changes to
MEASURING
via
INITIATED
and
WAIT_FOR_TRG
. After the measurement has been completed,
FETCh?
delivers the result to the output queue from which it can be fetched.
C.4.2 Configuration of the trigger system
C.4.2.1 Trigger source
After a measurement is started with
INIT
, the state
WAIT_FOR_TRG
is entered. This is
a preliminary stage to the measurement, which has been initiated so that the measure-
ment may start with high accuracy at a defined point in time. For this purpose, different
sources can be defined for the trigger event, which triggers the measurement. In manual
operation, a trigger event is not expected in the "ContAv" mode. Since the measurement
is to be performed continuously, the trigger source (
TRIGger:SOURce
) is set to
IMMediate
.
Measuring with low-level commands