Working with noisy waveforms – Fluke Biomedical 190M User Manual
Page 37
Using the Scope and Meter
Acquiring Waveforms
1
27
4
F4
Open the
INPUT A
menu.
5
ENTER
Select and accept Variable.
6
F4
Exit the menu.
At the bottom left of the screen the text A Var is displayed.
Selecting Variable will turn off cursors and automatic input
ranging.
7
mV
V
RANGE
Press mV to increase the
sensitivity, press V to decrease
the sensitivity.
Note
Variable input sensitivity is not available in the
Mathematics functions (+ - x and Spectrum).
Working with Noisy Waveforms
To suppress high frequency noise on waveforms, you can
limit the working bandwidth to 20 kHz or 20 MHz. This
function smoothes the displayed waveform. For the same
reason, it improves triggering on the waveform.
To choose HF reject on for example input A, do the
following:
1
A
Display the
INPUT A
key labels.
2
F4
Open the
INPUT A
menu.
3
ENTER
Jump to Bandwidth: and select
20kHz (HF reject) to accept the
bandwidth limitation.
Tip
To suppress noise without loss of bandwidth, use
the average function or turn off Display Glitches.