R&S NRP
Annex: Remote Control - Commands
1144.1400.12
Annex - I.17
E-2
•
Scope mode (
SENS:FUNC "XTIM:POW"):
This mode is used to determine a large number of
measured values in succession. The number of required measured values is set with
SENS:SWE:POI
and the total measurement time with
SENS:SWE:TIM
. Note that each
measurement must be triggered separately. This point is a difference between the Scope mode and
the Timeslot mode, in which it is only necessary to start the measurement for measuring the power
in all timeslots.
Example:
*RST
SENS:FUNC "XTIM:POW"
SENS:SWE:POIN 256
SENS:SWE:TIM 600 us
TRIG:COUN 256
(change to IDLE state after the 256th measurement)
INIT
FETCh?
Averaging/filters
The power values to be measured are sampled by the sensors. The sampling values then undergo two-
stage filtering before they are made available as measured values.
The first filter stage is a time integration. The integration time is either set explicitly (ContAv mode:
SENS:APER
, Timeslot mode:
SENS:TSL:WIDT
and Scope mode:
SENS:SWE:POIN
and -
:TIME
) or
determined automatically (BurstAv mode).
Filtering (averaging) is the second filter stage, which is configured via the command path
SENS:AVERage
. These settings are used to obtain a stable (noise-free) result up to a required
accuracy. This is done by means of a digital filter, which has a variable length: the longer the filter, the
more stable the result.
•
Manual filter setting: The filter-length automatic mode is deactivated and the filter length is set in
power-of-two numbers.
Example:
*RST
SENS:AVER:STAT ON
(activates filtering)
SENS:AVER:COUN:AUTO OFF
(switches off filter-length automatic mode)
SENS:AVER:COUN 4
(permanently sets filter length to 4 = 2
2
)
INIT
FETCh?
