Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 4.212 E-11
Attenuator setting Preamplifier setting
30 dB off
25 dB off
20 dB off
15 dB off
10 dB off
5 dB off
0 dB off
15 dB on
10 dB on
5 dB on
0 dB on
To adjust the attenuation manually, refer to the table above that lists reasonable combinations of
attenuator and preamplifier settings. The maximum total attenuation is achieved with the setting of the
first line. If you want to set the R&S FSL hardware manually you should start with the maximum
attenuation and then reduce the total attenuation until an overload will be reported (OVL displayed on
the screen). Depending on the intended measurement, you should then choose an attenuation of about
one or two steps higher than the setting that caused an overload. Be aware, that the manual attenuator
and the preamplifier setting is kept for all measurements. For further details refer to the RF Atten
Manual and Preamp On/Off softkeys.
Alternatively, you can automatically adjust the attenuator and the preamplifier using the Adjust
Attenuation softkey. The Cable TV Measurements option sets the optimum values for the
measurement. If you change to another measurement, these values may be altered automatically in
order to find the optimum setting (e.g. low noise or low distortion) for the chosen measurement.
Labels used in the measurement displays
Positions of special values are marked as vertical lines in the measurement display.
Label Description
VC Vision Carrier
SC1 Sound Carrier 1
SC2 Sound Carrier 2
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