User manual

Audio Monitor
4-100
AM700 Audio Measurement Set User Manual
From the View Setup screen displayed when you touch the Setup icon (see
Figure 4-50) you can configure up to four views of the two input channels. For
example, Channels 1 and 2 can be displayed separately or overlaid in the same view,
as shown in Figure 4-48 and Figure 4-49. When you overlay them in the same view,
traces are distinguished by color. A channel label of the same color on the trace near
the graticule identifies each displayed channel. There is a feature of dual trace
displays in the same view that has no front-panel selections. To swap traces (make
the back one the front one) touch the back trace, and press the Select button. If
cursors are up, the readouts now indicate for the new front trace, and the opposite
y-axis graticule should be highlighted as seen in Figure 4-48.
When you display the two channels in separate views, the touch-and-zoom controls
affect each channel separately. The graticule in each view tracks amplitude-per-
division separately. You can specify graticule scale units in volts or mV using the
Units menu that appears when you press the Units button with a vertical graticule
selected. Selecting the vertical axis and pressing and releasing the Units button will
also toggle the units for the y-axis scaling. The x-axis scale has units of seconds and
mS.
View Options. The View Options choices permit selection of x-axis scaling as linear
or logarithmic, display persistence, and cursor enabling and constraining as shown
in Figure 4-51. Making a selection places a check mark in the soft key and enables
the selection as indicated by the soft key. Touching it again removes the check mark
and restores the default condition. The choices in the Axes column allow the
linear/log selection for the x-axis and a choice of dual y-axis. Dual y-axis displays
are permitted when more than one trace is displayed in a single view. The vertical or
y-axis of the front trace is seen on the left side of the display window and the right
side displays the y-axis for the back trace.
In the Waveform column, when persistent is enabled, trace data is accumulated and
held in the display. This feature is very useful for gathering history of waveform
changes and showing the bounds of varying signals in either frequency, voltage, or
both. Turning persistent off restores the trace to showing data for a single acquisi-
tion only.
Cursor controls for enabling the cursors and holding the cursors to the displayed
data are found in the Cursors column. Enabling or disabling cursors is the same as
turning them on or off using the Cursor button on the front panel. Selecting Snap to
Data is useful for placing the cursors in the display window on the trace data.