R&S NRP2, Руководство пользователя

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Programming Measurements
R&S
®
NRP2
398 User Manual 1173.9157.02 ─ 03
C.7 Synchronizing Measurements
Some sensors (e.g. R&S NRP-Z81/85/86) are able to generate signals on the (external)
trigger bus, when an internal trigger was detected. This allows for synchronized meas-
urements with multiple sensors.
One sensor has to be configured as trigger master (
:TRIG:SOUR INT; :TRIG:MAST
ON
), while all other sensors are slaves with external trigger source (
:TRIG:SOUR EXT
).
In the following example, sensor B is configured for a trace measurement as trigger mas-
ter. Sensor A acts as trigger slave and performs a ContAv measurement. Sensor A will
be started first and immediately enter WAIT_FOR_TRIGGER state. It will remain in this
state, until an external trigger occurs. Sensor B will start its measurement, after detecting
an internal trigger. The internal trigger event will be duplicated to the external trigger bus
with a delay of approximately 30 ns (R&S
NRP-Z81/85/86).
*rst
*cls
conf1 DEF, 0.01, (@1) 'configure calcblock 1 with sensor 1 in ContAv mode
conf2:xtime (1024), 5 ms, (@2) 'configure calcblock 2 with sensor 2 in Trace mode
trig2:sour INT 'Internal trigger source
trig2:master ON 'sensor 2 is trigger master
trig1:sour EXT 'sensor 1 is slave with external trigger source
init1:imm 'start measurement on sensor 1
init2:imm 'at last start trigger master sensor
fetch1? 'get the measurement result of sensor A
fetch2? 'get the measurement result of sensor B
syst:err? 'check for errors
C.8 Optimization of measurement speed
The duration of a message can be reduced by making the following setting:
SYST:SPEed FAST
(deactivates screen content !!!)
The following settings also affect the measurement speed to a greater or lesser extent.
Which of these settings are possible, however, depends on what is to be measured. For
example, if measurement accuracy is important, filtering may also have to be activated,
which can reduce the measurement speed. The length of the integration time also directly
affects the measurement time and should therefore be kept as short as possible if a short
measurement time is desired. Consequently, the following list can only serve as a guide-
line for minimizing the measurement time.
Example
SYST:SPEed FAST 'deactivates screen content
SENS:AVER:STAT OFF 'deactivates filtering of measured value
Synchronizing Measurements