Ceyear 4041 Series, User Manual

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Chapter IV Spectrum Analyzer Mode
73
OBW
Off On
OBW
Method
% dBc
%
99.00%
dBc
-3.00dB
Span
>
·[OBW Off On]: Press
【
Measure
】 →[OBW]→[OBW Off On] to enable or disable the
occupied bandwidth measurement.
·[Method]: Press
【
Measure
】 →[OBW]→[Method % dBc] to select corresponding
measurement method, power percentage or dBc down method. The percentage method
is used to obtain the occupied bandwidth of the signal by calculating the bandwidth of
the portion of the frequency that contains a certain percentage of the power of the
entire transmission signal. The percentage of the power may be set by the user. The
dBc down method defines the occupied bandwidth as the distance between the two
frequency points when the signal power drops dBc at both sides of the frequency point
where the peak power of the signal exists. The power down dBc of the signal is to be
set by the user.
·[%]: Press
【
Measure
】
→[OBW]→[%] to set the percentage of the power when the
power percentage method is selected.
·[dBc]: Press
【
Measure
】 →[OBW]→[dBc] to set the dBc down value of the signal.
·[Span]: Press
【
Measure
】
→[OBW]→[Span] to set the span for occupied bandwidth
measurement.