Datasheet

Acquire the Sign
al
FilterVu, Ban dwidth L imit, and Averaging
You can use FilterVu, Bandwidth Limits, or Average mode to reduce noise in your signal. Each has benefits .
NOTE. FilterVu does not apply to triggering. To reduce the effects of noise on your signal while triggering, use Bandwidth
Limits or use Coupling settings.
Use FilterVu when you want to do the following:
Adjust your filter frequency with m ore granularity than the Bandwidth Limit provides.
Adjust all channels to the same frequency.
Acquire a non-repetitive or a single-shot signal.
Use Bandwidth Limit when you w
ant to do the following:
Filter only one channel.
Trigger on a filtered signal.
Acquire a non-repetitive or a single-shot signal.
Use Average mode when you want to do the following:
Acquire a repetitive signal.
Noise on your signal is random (not correlated with the trigger).
Increase the vertical precision of your acquisition.
NOTE. You can use FilterVu with B andwidth Limit. You cannot use FilterVu with Average mode.
Quick Tips
You can choose to save to a file with full resolution (every point that was c aptured) or reduced resolution (fewer points).
When your signal is filtered, only the reduced-resolution waveform is guaranteed to be filtered to the chosen frequency.
Sometimes, the filter is unable to produce a full-resolution waveform with a frequency as low as the chosen frequency.
The frequency of the full-resolution waveform is shown in the saved file.
When the glitch capture background is on, a saved waveform file includes both the foreground and the background data.
Reference waveforms can be filtered; the chosen noise filter frequency also applies to references. Reference waveforms
also have a glitch capture background.
Reference waveforms are always saved at full resolution. Unlike saving a waveform to a file, there is no reduced
resolution option.
When the signal is not filtered, most measurements are taken on the foreground waveform. The min, max, and
peak-to-peak measurements are taken on the glitch capture background, because they measure the smallest and
largest amplitudes in the waveform.
When the signal is filtered, all measurements are taken from the filtered waveform.
Dual-waveform math can be filtered; the chosen noise fi lter frequency also applies to math. Dual-waveform math
does not have a glitch capture background.
MSO2000B and DPO2000B Series Oscilloscopes User Manual 61