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Appendix A Interfaces
212
Interfaces
Printing Rates
The printing speed of text is measured in lines per minute (lpm), and is
a function of the selected font and the vertical dot density. Printing
speed is independent of the number of characters configured in the
character set repertoire. Print rates for lines containing attributes such
as bold or emphasized printing, superscripts, subscripts, or elongated
attributes will decrease to not less than half the rates of the font without
such attributes. The exact print rate of lines containing these attributes
depends on the specific print job, but software maximizes the
throughput by dynamically determining which dot rows contain adjacent
dots and must be printed in two strokes.
The reverse paper feed capability allows the printing of multiple
densities on a single line. This is useful in printing forms and text
together or in mixing different fonts on a print line. Use of multiple
densities and reverse paper feed also affects throughput.
Type: Standard: IEEE 1284 Parallel, RS-232/RS-422
serial
Optional: Dataproducts Long Lines, Ethernet
10Base-T, Ethernet 10Base2.
Logic Levels: TTL/EIA-232E/EIA-422B
Transfer
Rates
Up to 200 Kilobytes on parallel
interface.
Up to 38.4K baud on RS-232 and RS-
422 serial interface.