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Communications
FIGURE 9.37 Horizontal synchronous rotary indexing table. 479
FIGURE 9.38 Parallel-type data transmission.
Some additional control lines are required to ensure synchroniza-
tion between the transmitter and the receiver. Via these control lines,
the printer informs the terminal whether it is ready to take over a
character, and the terminal informs the printer that a character is
being sent. The distance between the transmitter and the receiver
may amount to a maximum of approximately 8 m, as line capacities
may lead to coupling and signal deformation. Transmission speed is
hardware-dependent and may theoretically amount to 1 Mbyte/s
(i.e., 1 million characters)—the line, however, can only be 1 m in
length.
