Measurement and display configuration
R&S
®
NRX
64
User Manual 1178.5566.02 ─ 09
Trigger source
Description
Remote commands to initiate the measurement
"External
2"
Requires a power sensor with a trigger input/
output.
Uses the external trigger signal that is supplied at
the trigger input/output of the power sensor.
TRIGger<Measurement>[:IMMediate]
"Sensor Check
Source"
Requires the sensor check source (R&S NRX-B1)
option.
If enabled, the sensor check source (R&S NRX-
B1) sends trigger signals using the internal trigger
bus. See
TRIGger<Measurement>[:IMMediate]
"Bus (*TRG)"
Waits for a trigger event. Press [1Trig] to trigger
the measurement.
Depending on the sensor type, the trigger is exe-
cuted by the trigger bus or by remote command.
See the user manual of the power sensor for
details.
TRIGger<Measurement>[:IMMediate]
6.1.3.3
Dropout time
The dropout time is useful when dealing with signals with several active slots, for
example GSM signals, see
. When measuring in sync with the signal, a trig-
ger event is to be produced at A, but not at B or C.
Figure 6-2: Significance of the dropout time
The RF power between the slots is below the threshold defined by the trigger level and
the trigger hysteresis. Therefore, the trigger hysteresis alone cannot prevent triggering
at B or at C. Therefore, set the dropout time greater than the time elapsed between
points D and B and between E and C, but smaller than the time elapsed between F
and A. Thus, you ensure that triggering takes place at A.
Because the mechanism associated with the dropout time is reactivated whenever the
trigger threshold is crossed, you can obtain also unambiguous triggering for many
complex signals.
Configuration for all measurement types
