Microscan MS-3000 User Manual page 60

Chapter 2 Menu Configuration
Note: The top offset must always be less than the bottom offset or the resulting
arc will be 0 degrees.
Top Offset in Degrees, along with Bottom Offset in Degrees, allows you to
set the raster sweep arc. See
Bottom Offset in Degrees
Default: 45 (degrees)
Options: 0 to 45 (in one-degree increments)
Note: The bottom offset must always be greater than the top offset or the result-
ing arc will be 0 degrees.
Bottom Offset in Degrees, along with Top Offset in Degrees, allows you to
set the raster sweep arc. See
Sweeps per Second
Default: 14
Options: 0 to 135
Allows you to control the raster motor speed. A "sweep" is defined as a sin-
gle pass, up or down, describing the raster image.
table A-1 on page 2-33
speeds at selected raster arcs. The minimum possible speed at any arc is
always one sweep per second. Maximum sweep speeds are the maximums
to which the scan head defaults—even when you enter higher speeds.
To maximize the number of scans a label will receive, select as few as pos-
sible sweeps per second. However, to ensure that the minimum required
scan lines cross the bar code label, it is essential that at least two full
sweeps occur during the time it takes for the label to pass through the read-
able scan width area.
For example, if the label is readable in the read range for only 1/10th of a
second, then the number of sweeps per second should be at least 20. If
readable for only 1 second, then sweeps per second (SPS) should be at
least 2. To see the formula for calculating sweeps per second, see the
MS-1280 Raster Scan Head User's Manual.
2-34
MS-3000 Single Head Decoder User's Manual
figure 2-8.
figure 2-8 on page 2-33.
shows minimum and maximum possible sweep