Operating Basics
5. Exit the menu. You will see the channel number and Va r in the left bottom
portion of the display screen.
NOTE. Selecting Variable will turn off cursors and automatic input ranging. Press
the Vertic
al Position buttons to increase or decrease sensitivity.
Adjust Bandwidth to
Smooth Wa
veforms
You can use bandwidth filters to suppress high frequency noise on waveforms by
limitin
g the working bandwidth to 20 kHz or 20 MHz. The application of filters
will smooth the d isplayed waveform. For the same reason, it will also improve
triggering on the w aveform.
To use the HF reject filter o n a desired input channel, do the following:
1. Press
the channel button for the active input to view the menu.
2. Select INPUT OPTIONS.
3. Select the 20 kHz (HF reject) bandwidth.
NOTE. To suppress noise without loss of bandwidth, use the average function or
turn off D isplay Glitches. (See page 35, Smooth a Waveform With Averaging.)
Using Mathematics
Functions +, –, x, XY-mode
You c an add (+), subtract (-), or multiply (x) two waveforms. The instrument will
display t he mathematical result waveform and the source waveforms.
The XY-mode provides a plot w ith one input on the vertical axis and the second
input on the horizontal axis.
The Mathematics functions perform a point-to-point operation on the involved
waveforms.
40 THS3000 Series Oscilloscopes User Manual
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