R&S ESR Series User Manual

Spectrum Measurements
R&S
®
ESR
254User Manual 1175.7068.02 ─ 12
A remote control programming example is described in Chapter 11.17.5, "Occupied
Bandwidth Measurement", on page 1013.
To determine the occupied bandwidth
1. Press the OBW 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 "%
Power Bandwidth (span > 0)" on page 255).
3. To change the channel bandwidth for the transmission channel, press the "Channel
Bandwidth" softkey (see "Channel Bandwidth (span > 0)" on page 255).
4. To optimize the settings for the selected channel configuration, press the Adjust
Settings softkey. For details see also "Optimized Settings for CP/ACLR Test
Parameters" on page 247.
5. To adjust the reference level to the measured total power after the first sweep,
press the Adjust Ref Lvl 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 Search Limits 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
OBW............................................................................................................................254
└ % Power Bandwidth (span > 0).................................................................... 255
└ Channel Bandwidth (span > 0)..................................................................... 255
└ Adjust Ref Lvl (span > 0).............................................................................. 255
└ Adjust Settings..............................................................................................255
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", on page 252.
Measurements

R&S ESR Series Specifications

General

Brand	R&S
Model	ESR Series
Category	Receiver
Language	English