R&S FSV-K7, Operating Manual, Page: 33 / 262

Analog Demodulation Option R&S FSV–K7
R&S
®
FSV-K7/K7S
33 Operating Manual 1176.7561.02 ─ 06
Remote command:
[SENSe:]FILTer<n>:CCIR[:UNWeighted][:STATe]
on page 150
SFM:
[SENSe:]SFM:<ChannelType>:FILTer:CCIR[:UNWeighted][:STATe]
on page 238
CCIR Weighted ← Weighting ← AF Filter ← AM
Switches on the CCIR weighted filter. The weighting filter is active in the following
demodulation bandwidth range:
100 kHz ≤ demodulation bandwidth ≤ 3.0 MHz
For FM stereo (K7S), the filter is active at all times, as the demodulation range is
always 400 kHz.
Remote command:
[SENSe:]FILTer<n>:CCIR:WEIGhted[:STATe]
on page 150
SFM:
[SENSe:]SFM:<ChannelType>:FILTer:CCIR:WEIGhted[:STATe]
on page 238
A Weighted ← Weighting ← AF Filter ← AM
Switches on the A weighted filter. The weighting filter is active in the following demodu-
lation bandwidth range:
100 kHz ≤ demodulation bandwidth ≤ 800 kHz
Remote command:
[SENSe:]FILTer<n>:AWEighted[:STATe]
on page 149
SFM:
[SENSe:]SFM:<ChannelType>:FILTer:AWEighted[:STATe]
on page 237
Deemphasis ← AF Filter ← AM
Opens the "Deemphasis" selection list to switch on a deemphasis with the given time
constant.
The deemphasis is active in the following demodulation bandwidth range:
Note: For FM stereo measurements (K7S), the demodulation bandwidth is always 400
kHz, thus the deemphasis is always active.
25 µs: 25 kHz ≤ demodulation bandwidth ≤ 40 MHz
50 µs: 6.4 kHz ≤ demodulation bandwidth ≤ 18 MHz
75 µs: 6.4 kHz ≤ demodulation bandwidth ≤ 18 MHz
750 µs: 800 Hz ≤ demodulation bandwidth ≤ 3 MHz
The following table shows the required demodulation bandwidth for an error less than
0.5 dB up to a maximum AF frequency.
deemphasis 25 µs 50 µs 75 µs 750 µs
max. AF frequency 25 kHz 12 kHz 8 kHz 800 Hz
required demodulation bandwidth ≥ 200 kHz ≥ 100 kHz ≥ 50 kHz ≥ 6.4 kHz
Softkeys of the Analog Demodulation option