Annex: Remote Control - Commands
R&S NRP
1144.1400.12
Annex - I.4
E-2
Selecting a measurement mode
Other MEAS commands are available for measurements to be performed in a mode other than the
ContAv mode. The short form of these commands is obtained by adding a keyword for the
measurement mode to keyword
MEAS
.
Timeslot measurement:
MEAS:TSLot? <tslot_width>,<no_slots>,<start_exclude>,<stop_exclude>
BurstAv measurement:
MEAS:BURSt? <dtolerance>,<start_exclude>,<stop_exclude>
Scope measurement:
MEAS:XTIMe? (<scope_size>),<capture_time>
Measurement in the ContAv mode with data buffering:
MEAS:ARRay? <tslot_width>,<no_slots>,<start_exclude>,<stop_exclude>
Note:
In the Timeslot mode, the trigger source is set to
EXTernal
. In the BurstAv
mode, it is not modified but ignored. Triggering in response to the signal is
performed as if
TRIGger:SOURce INTernal
were set.
These commands have the specified parameters, whose meanings are explained in the operating
manual. In addition, parameters
DEF, <resolution>, <source_list>
can be optionally specified
as for the
MEAS?
command.
Examples:
MEAS:TSLot? 577 us, 8, 18 us, 18 us
A timeslot measurement of a GSM signal is performed (8 timeslots with a length of 577 µs each).
18 µs at the beginning and the end of the timeslots are ignored. The measurement is carried out with
sensor 1 (default). The instrument is triggered by an external signal, which must be routed to the
R&S NRP rear panel via the trigger input. The measurement result is a list of 8 measured values
separated by a comma for the timeslots.
MEAS:BURSt? 5 us, 10 us, 0 us, DEF, 3, (@2)
Sensor 2 measures in the BurstAv mode. Triggering (in response to a rising edge) is internal. At the
beginning of the power pulse, 10 µs are ignored to avoid overshoots in the signal, which could distort
the measurement result. If the power falls below the trigger level but does not exceed 5 µs (dropout
time) the measurement will not be stopped. The measurement result is noise-free within the first 3
places and it is measured with sensor 2 (
(@2)
).
MEAS:XTIMe? (256), 577 us
Within the next 577 µs, 256 measured values are recorded and displayed with respect to time in te
same manner as with an oscilloscope in order to display the power characteristics. There is no
triggering (
TRIG:SOUR IMM
); the measurements are started after the command is received from the
R&S NRP. After a partial measurement has been completed, the next one is started. If the trigger
source setting is to be changed,
MEAS:XTIMe?
must be replaced by the
CONF:XTIMe
and
READ:XTIMe?
commands, between which user-defined settings can be performed. Dividing
MEAS?
into the
CONF
and
READ?
commands is described further down. The measurement result is a list of
256 measured values separated by a comma.
