R&S FSU
Firmware Release 4.61 SP3
27
E-33
Selection of Filter and Deemphasis – AF FILTER Menu
CCITT
CCIR
UNWEIGHTED
NONE
WEIGHTING
AF FILTER
CCIR
WEIGHTED
A
WEIGHTED
The
WEIGHTING AF FILTER softkey
opens the submenu for
selecting the weighting filter.
NONE:
Deactivates the weighting filter. This is the default
setting.
CCITT:
Switches on a CCIT P.53 weighting filter. The weighting
filter is active in the following demodulation bandwidth
range:
20 kHz
≤
demodulation bandwidth
≤
3 MHz
CCIR UNWEIGHTED: Switches on the CCIR unweighted filter,
which is the combination of the 20 Hz highpass and 23
kHz low pass filter. The weighting filter is active in the
following demodulation bandwidth range:
50 kHz
≤
demodulation bandwidth
≤
1.6 MHz
CCIR WEIGHTED:
Switches on the CCIR weighted filter. The
weighting filter is active in the following demodulation
bandwidth range:
100 kHz
≤
demodulation bandwidth
≤
3 MHz
A WEIGHTED: Switches on the A weighted filter. The weighting filter
is active in the following demodulation bandwidth range:
100 kHz
≤
demodulation bandwidth
≤
800 kHz
Remote commands:
:SENSe:FILTer:CCIR[:UNWeighted][:STATe] ON | OFF
:SENSe:FILTer:CCIR:WEIGhted[:STATe] ON | OFF
:SENSe:FILTer:CCITt[:STATe] ON | OFF
:SENSe:FILTer:AWEighted[:STATe] ON | OFF
Menu RANGE – NEXT
FUND FREQ
MANUAL
FUND FREQ
AUTO
The
FUND FREQ MANUAL / FUND FREQ AUTO
softkeys switches between
automatic or manual selection of the fundamental frequency used for the SINAD
and THD calculations. With automatic selection the peak in the AF spectrum is
used as the fundamental frequency.
When switching from AUTO to MANUAL the current modulation frequency result
is used as a default if the measurement result is available at this time.
These softkeys are available, if result
AF SPECTRUM
is switched on.
Remote commands:
:CALC:ADEM:THD:FREQ:FUND:AUTO ON | OFF
:CALC:ADEM:THD:FREQ:FUND:VALue <numeric value>
