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100
Press
【
BW
】
, [VBW Auto Man] to set the video bandwidth to the appropriate value.
In order to improve measurement accuracy, it is recommended that the ratio of resolution bandwidth to
video bandwidth be greater than 10. Press [RBW/VBW] to change the ratio of resolution bandwidth to
video bandwidth.
e) Switch the microwave analyzer to the occupied bandwidth measurement mode:
Press
【
Measure
】
, [OBW], [OBW Off On] .
After the occupied bandwidth measurement function is turned on, the microwave analyzer switches to
the occupied bandwidth measurement interface, and the measurement result is displayed at the bottom
of the screen, as shown in Figure 5-26.
Figure 5-26 Occupied bandwidth measurement
The two vertical dashed lines on the screen visually indicate the frequency range of occupied bandwidth.
If the occupied bandwidth measurement function is turned on, the detection mode of the microwave
analyzer is automatically switched to the root mean square detection mode.
Users can change the measurement method, occupied bandwidth, span and other parameters through
the corresponding menu to get more accurate measurement results.
f)
Select measurement method:
Press [Method % XdB] to select the measurement method for occupied bandwidth.
The measurement method can be set to the power percentage method, or the power drop XdB method,
the underline marks the currently selected mode, and the default is the percentage method.
g)
Change percentage:
If the measurement method is selected as the percentage method, press [Percent 99%] and use the
numeric keys, up and down keys or the rotary knob to change the percentage value.
The percentage setting range is 10% to 99.99%, the minimum step is 0.01%, and the default is 99%.
h)
Change XdB value:
When the measurement method is selected as XdB method, Press [XdB - 3.00], user can use the
numeric keys, up and down keys or the rotary knob to change the value of XdB.
The range of XdB value is set from -0.1dB to -100dB, the minimum step is 0.01dB, and the default is
-3dB.
i)
Change the occupied bandwidth span:
