Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
201User Manual 1178.8520.02 ─ 01
Auto measurement
Use the Auto All function to determine the required measurement parameters automat-
ically, see "Auto measurement" on page 202.
7.5.2 OBW Results
As a result of the OBW measurement the occupied bandwidth ( "Occ Bw" ) is indicated
in the marker results. Furthermore, the marker at the center frequency and the tempo-
rary markers are indicated.
The measurement is performed on the trace with marker 1. In order to evaluate
another trace, marker 1 must be placed on another trace (see Assigning the Marker to
a Trace ).
The OBW calculation is repeated if the Search Limits are changed, without performing
a new sweep. Thus, the OBW for a multicarrier signal can be determined using only
one sweep.
Centroid frequency
The centroid frequency is defined as the point in the center of the occupied bandwidth,
calculated using the temporary OBW markers T1 and T2. This frequency is indicated
as a function result ( "Occ Bw Centroid" ) in the marker table.
Frequency offset
The offset of the calculated centroid frequency to the defined center frequency of the
R&S FSV/A is indicated as a function result ( "Occ Bw Freq Offset" ) in the marker
table.
Remote command:
The determined occupied bandwidth can also be queried using the remote command
CALC:MARK:FUNC:POW:RES? OBW or CALC:MARK:FUNC:POW:RES? AOBW. While
the OBW parameter returns only the occupied bandwidth, the AOBW parameter also
returns the position and level of the temporary markers T1 and T2 used to calculate the
occupied bandwidth.
CALC:MARK:FUNC:POW:SEL OBW, see CALCulate<n>:MARKer<m>:FUNCtion:
POWer<sb>:SELect on page 750
CALCulate<n>:MARKer<m>:FUNCtion:POWer<sb>[:STATe] on page 750
CALC:MARK:FUNC:POW:RES? OBW, see CALCulate<n>:MARKer<m>:FUNCtion:
POWer<sb>:RESult? on page 749
CALC:MARK:FUNC:POW:RES? COBW, see CALCulate<n>:MARKer<m>:FUNCtion:
POWer<sb>:RESult? on page 749
Occupied Bandwidth Measurement (OBW)
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