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44
Fig.3.26 Marked is “UNCAL”
The RBW can be changed from 1kHz to 3MHz, taking the step of 1 and 3. After setting the “Res BW” to “Manu” state,
user can change the RBW by inputting the number, pressing the “Up/Down” cursor or rotating the knob.The symbol of
"#" is showed on the left parameter table.
2) VBW
Video bandwidth (VBW) is the lower pass filter after the IF filter which can make the display trace noise more
smoothly. It is very useful to detect the signal whose level is near to the noise. To improve the filter’s effect, user
should manually set the VBW to smaller than 1/10 of the RBW. When VBW is set to “Auto”, the VBW will change
with RBW. The VBW filter need establishing time too and the smaller its value is, the more time it needs.
In Fig.327, there is a “#VBW” on the screen, in which “#” indicates that VBW parameter is in “Manu” state now. The
same # will use to indicate the “Manu” of RBW, sweep time, attenuator too.
Fig.3.27 Wide VBW
Содержание S5800E Series
Страница 1: ...S5800E Series Field Comm Analyzer User Manual Saluki Technology Inc...
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