R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
PH NOISE
(ON OFF)
No marker enabled:
Markers are enabled:
Analyzer Mode
[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
rotary knob or adjusted by entering numerals.
The PHASE NOISE function is switched on and the measured
value is output.
[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).
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.
Remote command: --
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.
Remote command: CALC:DELT1:FUNC:PNO ON
CALC:DELT1:FUNC:PNO:RES?
Operating Manual 1313.9681.12 - 01 4.65