ADVANTEST R3131 Series User Manual

R3131 Spectrum Analyzer Operation Manual
2.3.2 Measuring the Occupied Bandwidth (OBW)
ADVANTEST R3131
REF 0.0 dBm
Mar 20 15.16.58
ATT 10dB A_wrt B_blnk
OBW
Posi Posi OBW
a Marker ON /OFF
-248.0-kHz
-3.64 dB
08W %
qkmardeckatandsJiidth.
width : 248.0 kHz
center: 1.8951508 6Hz
CENTER 1.8951500 GHz SPAN 800 kHz
RBW 10 kHz VBW 10 kHz SWP 50 ms
Figure 2-58 OBW Measurement Screen
When the measurement has been completed, a window showing the width and
center of the occupied bandwidth is displayed(center refers to center frequency
not carrier frequency), and two markers are placed at either end of the occupied
bandwidth.
In this example, which has a ratio of 99.0% (initial value), each marker is dis-
played at 0.5% and 99.5% of the total power.
Changing the ratio to the total power
This changes the ratio to 95%.
9. Press OBW%, 9, 5 and Hz (ENTER).
The ratio to the total power is now 95%.
ADVANTEST R3131
REF 0.0 dBm
10d8/
ANNA__
95.0 %
Mar 20 15:17:37
ATT 10dB A_wrt 0_blnk
OBW
Posi Posi OBW
a Marker ON /OFF
1.17 dB
OBW
,Occubied EtancLituttiVit
width : 211.2 kHz
center: 1.8951532 6Hz
CENTER 1.8951500 GHz SPAN 800 kHz
RBW 10 kHz VBW 10 kHz SWP SO ms
Figure 2-59 OBW(95%) Measurement Screen
2-64

ADVANTEST R3131 Series Specifications

General

Brand	ADVANTEST
Model	R3131 Series
Category	Measuring Instruments
Language	English