SRS Labs SR430, Manual

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36
Display Menu
and going up to 5000 counts/division (40000 counts full scale). This al-
lows the full range of count data to be displayed. If the data is in floating
point representation (as a result of a Math function), zooming in is limited
by the 16 bit resolution of the data. Vertical zooming takes place about
the cursor marker (if the cursor is on) or the center of the screen (if the
cursor is off).
Horizontal scaling is in powers of 2 from 8 bins up to 1k bins across the
screen, and above 1k bins in increments of 1k up to the number Bins/
Record (1k to 16k) across the full screen. Horizontal zooming takes place
about the cursor marker position unless the cursor is too close to the be-
ginning or end of the record. In this case, zooming will leave the left or
right edge of the graph unchanged.
Cursor On/Off
This function turns the cursor region and cursor marker on and off. It is
sometimes desirable to turn off the cursor before printing the screen.
Cursor Width
This function selects the width of the cursor region defined by the vertical
dashed lines on the graph.
Normal width is 1/2 of a division, Wide is 1 division, and Spot is a single
X position on the screen (the cursor marker is a single dashed line).
The cursor region moves to the left and to the right a single pixel at a
time. There are 496 pixels across the graph.
Cursor Seeks
The cursor marker searches the data points within the cursor region for
the maximum or minimum data value, or calculates the mean of the re-
gion. This key toggles between Max, Min, and Mean.
When seeking minimum or maximum, the cursor marker is located at the
minimum or maximum data point. This allows peaks and valleys in the
data to be read easily. When seeking mean, the X position of the cursor
marker is the center of the cursor region and the Y position is the mean
of the data within the region. When a spot cursor region is used, the cur-
sor marker is confined to a single X screen location. However, depending
upon the horizontal scaling, each X screen location may represent multi-
ple data points. The cursor marker can still seek the minimum, maximum,
or mean of the data at a single X screen location.
Grid On/Off
This function turns the grid display on and off. The grid is the set of dot-
ted lines on the graph which mark each scale division.