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O
PERATOR
’
S
M
ANUAL
WRXi-OM-E Rev B
77
When you zoom a waveform, an approximation of the zoomed area will appear in a thumbnail icon in the
Vertical
Adjust
dialog:
Zooming a Single Channel
1. In the menu bar, touch
Vertical
; then touch a channel number in the drop-down menu. Alternatively, you can
just touch the channel trace label for a displayed channel.
2. Touch
the
Zoom
button at the bottom of the
Cx Vertical Adjust
dialog. A zoom trace (one of Z1 to Z4) will be
created of the selected channel.
3. To vary the degree of zoom, touch the newly created
Zx
trace label. The setup dialog for the math function
opens. It shows the current horizontal and vertical zoom factors.
o
If you want to increase or decrease your horizontal or vertical zoom in small increments, touch the
Var.
checkbox to enable variable zooming. Now with each touch of the zoom control buttons
, the degree of magnification will change by a small increment.
o
To zoom in or out in large standard increments with each touch of the zoom control buttons, leave the
Var.
checkbox unchecked.
o
To set exact horizontal or vertical zoom factors, touch inside the Horizontal
Scale/div
data entry field
and enter a time-per-div value, using the pop-up numeric keypad.
9. Then touch inside the Vertical Scale/div field and enter a voltage value.
Reset the zoom to x1 magnification, touch
Reset Zoom
in the dialog or press the front panel zoom button.
Zooming by Touch-and-Drag
1. Touch and drag a rectangle around any part of an input channel waveform, math trace, or memory trace. If
you have enclosed a combination of channel and math or memory traces in the rectangle, a pop-up
"Rectangle Zoom Wizard" will appear.
2. Check all waveforms to be included in the zoom.
3. To turn off the zoom traces, touch the
Undo
button at the top-right corner of the screen. Or, uncheck the
Trace On checkbox in the dialog for each zoom trace.
Varying the Degree of Zoom
1. Touch the newly created
Zx
trace label. The setup dialog for the zoom trace opens. It shows the current
horizontal and vertical zoom values.
2. Touch inside the Horizontal or Vertical
Scale/div
field to highlight it, then turn the front panel
A
DJUST
knob to
change the zoom value. The changing value is displayed in the
Scale/div
field.
o
If you want to increase or decrease your horizontal or vertical zoom in small increments, touch the
Var.
checkbox to enable variable zooming. Now as you rotate the
A
DJUST
knob, the degree of
magnification will change by a small increment. To zoom in or out in 1-2-5 standard increments, leave
the
V
AR
.
checkbox unchecked.