User's Manual

accept scans of the correct number of digits.
Finally, a check digit may be used. The Interleave 2 of 5 symbology has an optional check character which uses
a weighted Modulo 10 scheme. The check character is the last character in the symbol and should be checked by
the decoder and then transmitted with the data. Since Interleave 2 of 5 must always have an even number of
digits, the leftmost character may need to be a zero when the check character is added. The standard check digit
is calculated by assigning alternating 3,1,3,1… weights to respective data digits. These weights are then
multiplied by their respective data digits and the products are summed. The check digit is the digit needed to be
added to the sum to make it an even multiple of 10. An example would be if the sum of the products was 37, the
check digit would be 3.
How many barcodes can we store?
The number of barcodes that can be stored in these bytes depends upon the size of the barcodes
Example
: If only UPCA barcodes are scanned and the check digit is not transmitted, then each barcode takes up
11 (barcode data) + 2 (total bytes) + 2 (length and type) + 4 (time stamp) = 19 bytes. The maximum number of
UPCA barcodes that can be saved is 204,800/19 =10,778. However, the maximum number of barcodes that can
be stored is 10,240. Therefore, the KDC200 can store 10,240 UPCA barcodes.
If different length barcodes are mixed, then a user cannot compute a priori the maximum number of barcodes
that can be stored.
What happens when the data buffer is full?
When the buffer is full, KDC200 displays buffer full message and ignores the command to scan barcodes. User
should clear the buffer to continue the data collection.
Caution RF EXPOSURE INFORMATION
Caution RF EXPOSURE INFORMATIONA minimum separation distance of 7.9 inches
(20cm) must be maintained between the user and the external antenna of repeater to
satisfy FCC RF exposure requirements. For more information about RF exposure,
please visit the FCC 