User`s guide

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Data Bits The serial Data Bits menu item selects whether the host
computer word length is set at seven or eight bits (default).
If information is transmitted from your computer in eight-bit
words, it must be received by the printer in eight-bit words.
Parity Parity adds a check bit to data information to verify the
accuracy of the information. The Parity menu item allows
you to select whether the information transmitted via the serial
interface is checked for accuracy with the parity being even or
odd. If none (default) is selected, the information transmitted
is not verified.
The parity on the printer should match the setting on your
host computer.
Stop Bits The Stop Bits menu item selects the default number of stop bits.
The total number of bits for each byte sent or received is the sum
of the number of start bits (always 1), data bits, parity bits, and
stop bits. Select the number of stop bits that match those of your
host computer. *1 is the factory default.
DTR Polarity This item only appears if DTR is selected as the Flow Control
default. The Data Terminal Ready (DTR) Polarity menu item
allows you to select whether the DTR line on the serial interface
is high or low when the printer is ready to receive data. The
host setting must match the printer setting. *High is the
factory default.
Using the Control Panel 2-23