R3131 Spectrum Analyzer Operation Manual
2.3.2 Measuring the Occupied Bandwidth (OBW)
Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
5. Press FREQ, 1, 8, 9, 5, ., 1, 5 and MHz.
A center frequency of 1895.15 MHz is set.
6. Press SPAN, 8, 0, 0 and kHz.
A frequency span of 800 kHz is set.
Setting the detector mode
7. Press TRACE, Detector and Posi.
The trace is set to positive detector mode.
ADVANTEST R3131
REF 0.0 dem
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Mar 20 15.15.12 Trc Det A
ATT 10dB A_wrt B_blnk
Posi Posi
Normal
CENTER 1.8951500 GHz SPAN 800 kHz
RBW 10 kHz VBW 10 kHz SNP 50 ms
Figure 2-57 Setting the Detector Mode
Measuring the OBW
Posi
Nega
Sample
8. Press POWER MEASURE, OBW and OBW ON/OFF.
The OBW measurement is activated and the result displayed.
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