R&S ESCI Analyzer - MKR FCTN
1166.6004.12 4.131 E-1
The PHASE NOISE function measures the noise power at the
delta markers referred to 1 Hz bandwidth. The sample detector
is automatically used and the video bandwidth set to 0.1 times
the resolution bandwidth (RBW). The two settings are taken
into account in the correction values used for the noise power
measurement.
To obtain stable results, two pixels on the right and the left of
the respective delta marker position are taken for the
measurement. The procedure for determining the noise power
is identical to the method used for the noise power
measurement (see NOISE softkey). The measured noise level
referred to 1 Hz bandwidth is subtracted from the carrier level
at the reference marker (MARKER 1). The measured values
are displayed in the delta marker field in dBc/Hz (= spacing in
dB of the noise power from the carrier level in 1 Hz
bandwidth).
If several delta markers are enabled, only the value read by
the active marker is shown in the marker field. If several delta
markers are active, their measurement results are shown in
the marker info field.
The reference value for the phase noise measurement can be
defined with REF POINT LEVEL, REF POINT FREQUENCY
and REF POINT LVL OFFSET to differ from that of the
reference marker.
IEC/IEEE-bus command: --
PH NOISE
ON OFF
The PH NOISE ON/OFF softkey switches on/off the phase
noise measurement. Switching on is performed by means of
the PHASE NOISE softkey and is only necessary when the
phase noise measurement has been switched off in the
submenu.
IEC/IEEE-bus command: CALC:DELT1:FUNC:PNO ON
CALC:DELT1:FUNC:PNO:RES?
REF POINT
LEVEL
The REF POINT LEVEL softkey activates an entry box for
the input of a reference level other than the reference
marker level. The function is identical to that of the softkey
with the same name in the marker menu (MKR).
IEC/IEEE-bus command:
CALC:DELT1:FUNC:FIX:RPO:Y -10dΒ
REF POINT
LVL OFFSET
The REF POINT LVL OFFSET softkey activates an entry
box for the input of an additional level offset for the phase
noise calculation.
This level offset is set to 0 dB on when the REFERENCE
FIXED or PHASE NOISE function is enabled.
IEC/IEEE-bus command:
CALC:DELT:FUNC:FIX:RPO:Y:OFFS 10dB
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