R3132 Series Spectrum Analyzer Operation Manual
2.3.2 Measuring the Occupied Bandwidth (OBW)
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2.3.2 Measuring the Occupied Bandwidth (OBW)
The occupied bandwidth can be calculated from the measured screen data using the OBW function. In this
operation, the ratio of the OBW to the total power ranges from 10.0 to 99.8%. The initial setting is 99%.
Measurement conditions:
This example shows how to measure the occupied bandwidth for a unit similar to PHS outputting a fre-
quency of 1917.950 MHz, an OBW of 288 kHz and a level of 20 dBm.
Use appropriate parameter values to make the measurements shown below.
NOTE: NOTE:Set the reference level and the frequency span so that the signal amplitude on the screen is 50
dB or more in order to reduce operation error (when the signal amplitude on the screen does not exceed
50 dB, the operation error is large). The optimum span is approximately three times the occupied band-
width.
Setup
1. Connect the unit under test as shown in Figure 2-51.
Figure 2-51 Setup for Measuring the Occupied Bandwidth
Power on
2. Turn the power on.
Setting the unit under test
3. Turn on the signal output for the unit under test.
Initialization
This resets the current settings to the factory defaults.
4. Press SHIFT and CONFIG(PRESET).
The default settings have now been reset.
R3132 Series Spectrum analyzer
Unit under test
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