Ceyear 4041 Series, User Manual

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Chapter IV Spectrum Analyzer Mode
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g) Select the measurement method:
Press
【
Measure
】
, [OBW] and [Method % dBc] successively, and then select the measurement method of
occupied bandwidth. The measurement method can be set to the power percentage method or the dBc down
method. The underlined mode is the mode selected currently, and the percentage method is set as default.
Fig 4-3 Occupied bandwidth measurement
h) Change the percentage:
If you decide to use the power percentage method, press
【
Measure
】
, [OBW] and [% 99%] successively and
then change the percentage with the numeric key, the Up or Down key or the knob. The set value of percentage
ranges from 10% to 99.99% with a minimum step of 0.01%, and 99% is set as default.
i) Change the value of dBc:
If you decide to use the dBc down method, press
【
Measure
】
, [OBW] and [dBc -3.00 dB] successively and then
change the value of X dB with the numeric key, the UP or DOWN key or the knob. The set value of X dB ranges
from -0.1 dB to -100 dB with a minimum step of 0.01 dB, and -3 dB is set as default.
j) Change the occupied bandwidth span:
Press
【
Measure
】
, [OBW] and [Span] successively, enter the occupied bandwidth span with the numeric key, and
then enter the unit with the soft key. The default is 3 MHz.
k) Disable the occupied bandwidth measurement:
Press
【
Measure
】
, [OBW] and [OBW Off On] successively, and then select Off to exit occupied bandwidth
measurement. After that, the analyzer will switch back to the spectrum measurement interface.
4.1.3 Adjacent channel Power meter
In this section, the adjacent channel power ratio measurement of FM signal is taken as an example to demonstrate
the method to measure the adjacent channel power ratio with the 4041 series spectrum analyzer.