3-24
Figure 3-23.—Rfcs transmit (send) system.
TELETYPEWRITER SETS.—Most of the teletypewriter sets used by the Navy belong to one
family of tty equipment. This equipment features various weights and sizes, quiet operation, and high
operating speeds. They present relatively few maintenance problems. Because of this they are well suited
for severe shipboard conditions of roll, vibration, and shock.
These teletypewriters operate at various speeds. Conversion from one speed to another is usually
only a matter of changing the gears that are located within the equipment.
Teletypewriters may be send/receive units or receive only units. They may be designed as floor
models, table models, or rack and wall-mounted sets. The teletypewriter shown is a send/receive floor
model.
The teletypewriter receives messages and prints them on page-size copy paper. In addition, it can
receive and record messages on perforated tape. You can use the keyboard or perforated tape to send
messages. Page print monitoring is available with both methods. The set shown can prepare perforated
and printed tape for separate transmission. It does this with or without simultaneous transmission and
page-print monitoring. The combinations of services available are extensive.
The tty set may include a CABINET, KEYBOARD, PAGE PRINTER, TYPING PERFORATOR,
TRANSMITTER DISTRIBUTOR, TYPING REPERFORATOR, power distribution panels, and a power
supply.
In operation, the components are linked by electrical or mechanical connections. You are given a
wide range of possibilities for sending, receiving, or storing tty messages. All equipment components are
housed within the cabinet. Transmission signals are initiated through the keyboard (kybd) or through the
