R&S NRP-Z28/-Z98
Remote Control - Commands
1170.8966.12
6.21
E-4
SENSe:TRACe:AVERage:TCONtrol[?] MOVing | REPeat
SENSe:TRACe:AVERage:TCONtrol
(terminal control)
defines how the measurement results are to be
output in the
Trace
mode if the averaging filter has been activated.
The
REPeat
parameter specifies that a measurement result is not output until the entire measurement
has been completed. This means that the number of measurement cycle repetitions is equal to the set
averaging factor. If the averaging factor is large, the measurement time can be very long.
When settings are made with the
MOVing
parameter, intermediate values are output to facilitate early
detection of changes in the measured quantity. In the settled state – i.e. the number of measurements
specified by the averaging factor have been performed – a moving average is output in the
Trace
mode. The
SYStem:RUTime
command can be used to vary the output rate over a wide range so that
some intermediate results can be ignored.
The query yields
•
1
for
MOVing
,
•
2
for
REPeat
.
Default setting:
REPeat
SENSe:TRACe:MPWidth?
With
SENSe:TRACe:MPWidth?
, the attainable time resolution can be read out for the
Trace
mode. The
readout value is the smallest possible distance between two pixels – in other words, it is the smallest
time interval that can be assigned to a pixel. With internal triggering (setting
TRIGger:SOURce
INTernal
), this value is 10
S
s and is thus nearly identical with the reciprocal of the sampling frequency.
With external triggering (setting
TRIGger:SOURce EXTernal
), the value can be reduced down to 2.5
S
s.
However, the prerequisite for this is that realtime processing is deactivated (setting
SENSe:TRACe:REALtime OFF
) so that more than one sampling sequence can be recorded. By
offsetting the sampling sequences to each other by a certain time (equivalent time sampling), the
sensor can then attain a better time resolution. The number of repetitions the sensor needs for this is
equal to 32 times the averaging factor.
If the user sets a point matrix that is denser than the resolution it corresponds to (10
S
s or 2.5
S
s), a
value is output for each of these points, but neighboring points may be assigned the same value.
Note: The point matrix to be output is defined by the trace length (setting
SENSe:TRACE:TIME
) and the
number of points (setting
SENSe:TRACe:POINts
).
SENSe:TRACe:OFFSet:TIME[?] – (<TRIGger:DELay> + 0.005) to 100.0
SENSe:TRACe:OFFSet:TIME
is used to specify the start of recording for the
Trace
mode. It is identical
with the first pixel. The time associated with the last pixel is the time associated with the first pixel plus
the trace length. The start of recording is referenced to the delayed trigger point (settable with the
TRIGger:DELay
command). Negative values indicate that the start of recording occurs before the
trigger point.
Due to the hardware limitations of the power sensor, the recording cannot start at any point in time
before the physical trigger event, i.e. the sum of the parameters
TRIGger:DELay
and
SENSe:TRACe:OFFSet:TIME
must be limited at the negative end. This limit amounts to –5 ms.
Example: The trigger delay is set to –500
S
s. This means that the start of recording can be set to occur
max. 4.5 ms before the delayed trigger point.
The query yields the start of recording in seconds, referenced to the delayed trigger.
Default setting:
0.0 [s]
