Measuring Phase Noise - R&S FSW-K7 User Manual

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R&S FSW-K7
Remote command:
CALCulate<n>:MARKer<m>:MAXimum:NEXT
CALCulate<n>:MARKer<m>:MAXimum:RIGHt
CALCulate<n>:MARKer<m>:MAXimum:LEFT
CALCulate<n>:DELTamarker<m>:MAXimum:NEXT
CALCulate<n>:DELTamarker<m>:MAXimum:RIGHt
CALCulate<n>:DELTamarker<m>:MAXimum:LEFT
Search Minimum
Sets the selected marker/delta marker to the minimum of the trace. If no marker is
active, marker 1 is activated.
Remote command:
CALCulate<n>:MARKer<m>:MINimum[:PEAK]
CALCulate<n>:DELTamarker<m>:MINimum[:PEAK]
Search Next Minimum
Sets the selected marker/delta marker to the next (higher) minimum of the selected
trace. If no marker is active, marker 1 is activated.
Remote command:
CALCulate<n>:MARKer<m>:MINimum:NEXT
CALCulate<n>:MARKer<m>:MINimum:LEFT
CALCulate<n>:MARKer<m>:MINimum:RIGHt
CALCulate<n>:DELTamarker<m>:MINimum:NEXT
CALCulate<n>:DELTamarker<m>:MINimum:LEFT
CALCulate<n>:DELTamarker<m>:MINimum:RIGHt

6.3.3 Measuring Phase Noise

Access: "Overview" > "Analysis" > "Marker Functions" > "Phase Noise"
or: MKR FUNC > "Select Marker Function" > "Phase Noise"
Phase noise is unintentional modulation of a carrier; it creates frequencies next to the
carrier frequency. A phase noise measurement consists of noise density measure-
ments at defined offsets from the carrier; the results are given in relation to the carrier
level (dBc).
In the Analog Demodulation application, phase noise measurement markers are avail-
able for the AF Spectrum result displays. For the FM Spectrum and PM Spectrum
result displays, the phase deviation in rad equals the phase noise at the marker posi-
tion. For AM Spectrum displays the marker result equals the amplitude noise at the
marker position.
The noise power density is measured at each marker for which the phase noise func-
tion is activated, and set in relation to the measured carrier power. A reference marker
is not required. In the marker table display, the phase noise is indicated as the marker
function result.
User Manual 1173.9240.02 ─ 23
Working with Markers in the R&S FSW Analog Demodulation application
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Analysis
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