Rohde & Schwarz FPL1000 Series, User Manual

Page: 451 / 899

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
451 User Manual 1178.3370.02 ─ 03
Power Mode
Defines the mode of the power measurement result.
"Power" The result is an absolute power level.
The power unit depends on the
Unit setting.
"Relative
Power" This setting is only available for a delta band power marker.
The result is the difference between the absolute power in the band
around the delta marker and the absolute power for the reference
marker (see
" Reference Marker " on page 426). The powers are sub-
tracted logarithmically, so the result is a dB value.
[Relative band power (Delta2) in dB] = [absolute band power (Delta2)
in dBm] - [absolute (band) power of reference marker in dBm]
For details see "Relative band power markers" on page 448
"Density" The result is a power level in relation to the bandwidth, displayed in
dBm/Hz.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:BPOWer:MODE
on page 747
CALCulate<n>:DELTamarker<m>:FUNCtion:BPOWer:MODE
on page 749
Switching All Band Power Measurements Off
Deactivates band power measurement for all markers.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:BPOWer[:STATe]
on page 748
CALCulate<n>:DELTamarker<m>:FUNCtion:BPOWer[:STATe]
on page 750
7.9.4.7 Demodulating Marker Values and Providing Audio Output (Marker Demodulation)
Access : "Overview" > "Analysis" > "Marker Functions" > "Select Marker Function" >
"Marker Demodulation" > "Marker Demod Config"
Or : MKR > "Select Marker Function" > "Marker Demodulation" > "Marker Demod Con-
fig"
The R&S FPL1000 provides demodulators for AM, FM and PM signals. The demodula-
tion marker function sends the demodulated data at the current marker frequency to
the audio output. Thus, a displayed signal can be identified acoustically with the help of
the internal loudspeaker or with headphones.
This function is not available for Spectrum Emission Mask measurements or measure-
ments on I/Q-based data.
The sweep stops at the frequency determined by marker 1 for the selected time and
the RF signal is demodulated in a bandwidth that corresponds to the RBW. Alterna-
tively, demodulation can be activated continuously, i.e. audio output occurs regardless
of the marker position and the marker stop time. For measurements in the time domain
(zero span), demodulation is always continuous.
Marker Usage