Spectrum Measurements
R&S
®
ESR
254
User Manual 1175.7068.02 ─ 12
A remote control programming example is described in
To determine the occupied bandwidth
1. Press the
softkey to activate the measurement of the occupied bandwidth.
The corresponding submenu is displayed.
2. Press the "% Power Bandwidth" softkey to enter the percentage of power (see
3. To change the channel bandwidth for the transmission channel, press the "Channel
Bandwidth" softkey (see
"Channel Bandwidth (span > 0)"
4. To optimize the settings for the selected channel configuration, press the
softkey. For details see also
"Optimized Settings for CP/ACLR Test
5. To adjust the reference level to the measured total power after the first sweep,
softkey.
Measurement 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 OBW calculation is repeated if the
are changed, without performing
a new sweep. Thus, the OBW for a multi-carrier signal can be determined using only
one sweep.
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.
Softkeys for Occupied Bandwidth (OBW) Measurements
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OBW
Activates measurement of the occupied bandwidth according to the current configura-
tion and opens a submenu to configure the measurement. The occupied bandwidth is
displayed in the marker display field and marked on the trace by temporary markers.
For details see
Chapter 6.1.1.4, "Measuring the Occupied Bandwidth"
Measurements