Ronde & Schwarz 1304.0004K03, User Manual

Page: 371 / 1071

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
371 User Manual 1178.3370.02 ─ 11
Note: If normal marker 1 is the active marker, switching the "Mkr Type" activates an
additional delta marker 1. For any other marker, switching the marker type does not
activate an additional marker, it only switches the type of the selected marker.
"Normal" A normal marker indicates the absolute value at the defined position
in the diagram.
"Delta" A delta marker defines the value of the marker relative to the speci-
fied reference marker (marker 1 by default).
Remote command:
CALCulate<n>:MARKer<m>[:STATe]
on page 836
CALCulate<n>:DELTamarker<m>[:STATe]
on page 834
Noise Measurement State
Activates or deactivates noise measurement for the marker in the diagram.
This function is only available for normal markers.
If activated, the marker displays the noise power density measured at the position of
the marker.
For details see Chapter 6.9.4.2, "Measuring Noise Density (Noise Meas Marker)" ,
on page 368.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:NOISe[:STATe]
on page 867
CALCulate<n>:MARKer<m>:FUNCtion:NOISe:RESult?
on page 866
Switching All Noise Measurement Off
Deactivates noise measurement for all markers.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:NOISe[:STATe]
on page 867
6.9.4.3 Phase Noise Measurement Marker
Access : "Overview" > "Analysis" > "Marker Functions" > "Phase Noise" > "Phase
Noise Config"
Or : [MKR] > "Select Marker Function" > "Phase Noise" > "Phase Noise Config"
For each of the 16 markers phase noise measurement can be activated.
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). The phase noise marker function measures the noise power at the delta
markers referred to 1 Hz bandwidth. Marker 1 is used as the reference for the phase
noise measurement. By default, the current frequency and level of marker 1 are used
as the fixed reference marker. However, a peak search can be started to use the cur-
rent signal peak as the reference point, or a reference point can be defined manually.
Since the reference point is fixed, the reference level or the center frequency can be
set so that the carrier is outside the displayed frequency range after phase noise mea-
surement is started. Or a notch filter can be switched on to suppress the carrier.
Marker Usage