Ceyear 4041 Series, User Manual

Page: 84 / 203

Chapter IV Spectrum Analyzer Mode
72
The spectrum analyzer provides the function of channel Power meter. Set the parameters in the menu and select
appropriate RBW and span to measure the channel power. Please refer to “Channel Power meter” in the first
section of this chapter.
Channel Pwr
Off On
Channel Pwr
Center Freq
Channel BW
Span
< Back
>
·[Channel Power Off On]: Press
【
Measure
】 →[Channel Power]→[Channel Pwr Off
On] to enable or disable the channel Power meter.
·[Center Freq]: Press
【
Measure
】
→[Channel Power]→[Center Freq], and use numeric
keys to set the center frequency.
·[Channel BW]: Press
【
Measure
】
→[Channel Power]→[Channel BW]
，
and use
numeric keys to set the channel width.
·[Span]: Press
【
Measure
】 →[Channel Power]→[Span] ，
and use numeric keys to set
the channel span.
·[Special Attention]: The channel power bandwidth is the frequency width within
which the spectrum analyzer displays the power. The channel power span is the
frequency range of the sweep. If the channel power span should be set larger than
or equal to that of the channel power bandwidth. If it is not, the spectrum
analyzer will automatically set the channel power bandwidth equal to the channel
power span. The ratio of the channel power span to the channel power bandwidth
remains constant. When the channel power span changes, this ratio remains the
same. This ratio can be changed by modifying the channel power bandwidth. For
example, when the channel power span doubles, the spectrum analyzer will
increase the channel power bandwidth by the same factor.
The spectrum analyzer is able to quickly provide clear and accurate measurement result of occupied bandwidth.
Based on modulation types, there are two different methods to calculate the occupied bandwidth: power
percentage and XdB down method. You can select the appropriate method to measure the occupied bandwidth
according to your specific requirements. Please refer to “Occupied bandwidth measurement” in the first section of
this chapter.