NCR Realscan 7837 - Delay between Blocks; Overall Checksum

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Delay Between Blocks
This sets the delay time between data blocks. Default = 50ms.
Overall Checksum
When this option is turned on, a computed check character is added at the end
of the entire message. The check character is the character which when
Exclusive-OR’d with every preceding character of the message yields a result of
0x00 (00H).
Default = Off.
5ms
500ms
* 50ms
150ms
On
* Off