Rohde & Schwarz FPL1000 Series, User Manual

Page: 283 / 899

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
283 User Manual 1178.3370.02 ─ 03
Some of the measurement specifications (e.g. PDC, RCR STD-27B) require measure-
ment of the occupied bandwidth using a peak detector. The detector setting of the
R&S
FPL1000 has to be changed accordingly then.
7.2.5.2 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.
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:SELect
on page 540
CALCulate<n>:MARKer<m>:FUNCtion:POWer[:STATe]
on page 540
Measurements and Results