MKR FCTN - Analyzer R&S ESCI
1166.6004.12 4.130 E-1
Phase Noise Measurement
Menu MKR FCTN:
PHASE
NOISE
REF POINT
LEVEL
OFF
PHASE NOISE
ON OFF
REF POINT
LVL OFFSET
REF POINT
FREQUENCY
PEAK
SEARCH
The PHASE NOISE softkey switches the PHASE NOISE
function on/off. Additionally, the softkey opens the submenu
for manually setting the reference point. The phase noise
measurement can be switched off in the submenu.
MARKER 1 (= reference marker) is used as a reference for the
phase noise measurement. The frequency and level of the
reference marker are used as fixed reference values, i.e. the
REFERENCE FIXED function is activated. After switching on
the phase noise measurement the reference level or the
center frequency can thus be set in a way that the carrier is
outside the displayed frequency range, or, for example, a
notch filter is switched on to suppress the carrier.
A noise power density measurement is carried out with the
delta marker or delta markers. This measurement corresponds
to the NOISE function in the MARKER menu (MKR). The
result of the phase noise measurement is the difference in
level between the reference point and the noise power density.
The following possibilities can be selected on switching on
PHASE NOISE:
1. No marker enabled:
[MKR FCTN] MARKER 1 is enabled and set to peak.
[PHASE NOISE] MARKER 1 becomes the reference
marker, MARKER 2 the delta marker;
frequency = frequency of the reference
marker. The delta marker is the active
marker, i.e. it can be moved with the
rollkey or adjusted by entering numerals.
The PHASE NOISE function is switched
on and the measured value is output.
2. Markers are enabled:
[MKR FCTN] The previous marker configuration
remains unchanged.
[PHASE NOISE] MARKER 1 becomes the reference
marker. If other markers are enabled,
they become delta markers and measure
the phase noise at their respective
positions.
If further markers are enabled during the phase noise
measurement, they automatically become delta markers and
measure the phase noise at their respective positions.
When the phase noise measurement is switched off, the
marker configuration remains unchanged and the delta
markers measure the relative level to the reference marker
(MARKER 1).
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