190M Series III
Users Manual
16
Noisy Waveforms
To suppress high frequency noise on waveforms, you can limit the working bandwidth to 10 kHz
or 20 MHz. This function smoothes the displayed waveform. For the same reason, it improves
triggering on the waveform.
To choose the 10 kHz bandwidth on for example input A, do the following:
1. Press
A
to show the INPUT A key labels.
2. Press
4
to open the INPUT A menu.
3. Use the cursor and
E
to highlight
Bandwidth:
and select
10kHz
to accept the bandwidth
limitation.
Note
To suppress noise without loss of bandwidth, use the average function or turn off
Display
Glitches
.
Mathematic Fun, -, x, XY-mode
You can add (+), subtract (-), or multiply (x) two waveforms. The test tool shows the mathematical
result waveform and the source waveforms. The XY-mode provides a plot with 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.
To use a Mathematics function, do the following:
1. Press
P
to show the SCOPE key labels.
2. Open the WAVEFORM OPTIONS menu with
4
.
3. Use the cursor and
E
to:
a. Highlight
Waveform:
b. Select
Mathematics...
to open the Mathematics.
c. Select
Function:
+, -, x or XY-mode.
d. Select the first waveform:
Source 1: A, B, C or D
.
4. Select the second waveform:
Source 2: A, B, C or D
.
The mathematical function key labels show on the display.
5. Press:
a.
2
-
h i
to select a scale factor to fit the result waveform onto the display.
b.
3
-
h i
to move the result waveform up or down.
c.
4
- Toggle the result waveform between on or off.
The sensitivity range of the mathematical result is equal to the sensitivity range of the least
sensitive input divided by the scale factor.
