POSIFLEX CD-3600, Advanced Manual

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Transmit CD:
This option enables the transmission of the check digit together with the data
characters. If the check digit calculation is disabled, the reader can not differentiate
anymore between a (valid) check digit and a data character. It will therefore transmit
all data characters of the label, including what could constitute a check digit.
Not transmit CD:
This option disables the transmission of the check digit. If the check digit calculation
is disabled, the reader can not differentiate between a (valid) check digit and a data
character. It will therefore transmit all data characters of the label, excluding the
character that could constitute the check digit for the type of bar code.
Transmit ST/SP:
This option enables the transmission of the start and stop characters of a bar code.
Not transmit ST/SP:
This option disables the transmission of the start and stop characters of a bar code.
The next figure summarizes the effect of the transmit options for a Code 39 label
with:

start and stop characters '*'

data characters '1 2 3 4 5 6'

or data characters '1 2 3 4 5' and check digit '6'
Note that because '6' is, according to the Code 39 specifications, not a valid check
digit for this label. The check digit calculation must therefore be disabled in order for
the label to be accepted.
See figure 3.11.
3.3.1. Options for UPC-A
The UPC-A symbology is a fixed length symbology encoding 11 data digits, a check
digit and non-printable start/stop characters. The following characters are supported:

the digits 0 up to 9
An optional leading zero can be transmitted, which together with the data and the
check digit forms a 13 digit field providing compatibility with the EAN-13 format.
For string format see figure 3.12.