R&S FSMR, Operating Manual

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R&S FSMR Analyzer - MKR FCTN
1166.3363.12 4.14-5 E-2
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 -10d
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
REF POINT
FREQUENCY The REF POINT FREQUENCY softkey activates an entry box for
the manual input of a reference frequency for the REFERENCE
FIXED or PHASE NOISE function.
IEC/IEEE-bus command:
CALC:DELT1:FUNC:FIX:RPO:X 10.7MHz
PEAK
SEARCH
The PEAK SEARCH sets the reference point level for delta marker
2 in the selected measurement window to the peak of the selected
trace.
IEC/IEEE-bus command:
CALC:DELT:FUNC:FIX:RPO:MAX