R&S FSL Analog Demodulation (Option K7)
1300.2519.12 4.149 E-11
Deemphasis
O
pens the Deemphasis dialog box to switch on a deemphasis with the given time constant.
The deemphasis is active in the following demodulation bandwidth range:
25 Ms: 25 kHz
demodulation bandwidth
18 MHz
50 Ms: 6.4 kHz
demodulation bandwidth
18 MHz
75 Ms: 6.4 kHz
demodulation bandwidth
18 MHz
750 Ms: 800 Hz
demodulation bandwidth
4 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 Ms 50 Ms 75 Ms 750 Ms
max. AF frequency 25 kHz 12 kHz 8 kHz 800 Hz
required demodulation bandwidth
200 kHz
100 kHz
50 kHz
6.4 kHz
For higher AF frequencies the demodulation bandwidth must be increased.
Remote: FILT:DEMP ON
Remote: FILT:DEMP:TCON 750us
Zero Phase Reference Point
Defines the position at which the phase of the PM–demodulated signal is set to 0 rad. The entry
is made with respect to time. In the default setting, the first measured value is set to 0 rad.
This softkey is only available in the PM display with DC coupling.
Remote: ADEM:PM:RPO 500us
Phase Wrap On/Off
Activates/deactivates the phase wrap.
On The phase will be displayed in the range ±180° (
). For example, if the phase
exceeds +180°, 360° is subtracted from the phase value, with the display thus
showing >–180°.
Off The phase will not be wrapped.
This softkey in available in the PM signal displays.
Remote: CALC:FORM PHAS
Phase Unit Rad/Deg
Sets the phase unit to rad or deg for displaying PM signals.
Remote: UNIT:ANGL RAD
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