Printing speed on the TT-48 and TT-69 teleprinters
is adjustable by changing gears, but is usually set at 100
WPM. One of your shipboard Radiomen trained in
teletype repair and maintenance will change the gears if
necessary. On the UGC-20 and UGC-25 teleprinters, a
switch lever on the left lower front edge of the printer is
used to change printing speeds between 60 WPM, 75
WPM, or 100 WPM. Turn the power off before
switching speeds.
Navy Standard Teleprinter
The AN/UGC-143A(V) Navy Standard
Teleprinters (NSTs) have replaced most of the Model
28 teleprinters. The NST is designed for shipboard
(both surface and subsurface) and shore station
applications.
The NST is a high-speed electronic teleprinter that
automatically accepts and processes transmissions
from 45.5 baud up to 9600 baud. It prints 120 characters
per second (1200 WPM). It is composed of several
modules selectively connected to form the various
configurations (configurations are discussed shortly).
The NST may be used either as a tabletop unit or slide-
mounted in standard equipment racks.
There are four versions of the AN/UGC-143A
Teleprinter: the AN/UGC-143A(V)l receive only-1
(RO1) teleprinter (fig. 1-32), AN/UGC-143A(V)2
receive only-2 (RO2) teleprinter (looks the same as an
RO1), the AN/UGC-143A(V)3 keyboard send-receive
(KSR) teleprinter (fig. 1-33), and the AN/UGC-
143A(V)4 automatic send-receive (ASR) teleprinter
(fig. 1-34). The various NST configurations consist of
Figure 1-33.—AN/UGC-143A(V)3 keyboard send-receive
(KSR) teleprinter.
combinations of one or several modules, such as the
electronic module, printer module, keyboard module,
keyboard/display module, or the bulk storage module.
All four configurations contain basic electronics and
printer modules. Only the RO2 and the ASR teleprinters
contain a bulk storage module. Of the two keyboard
configurations, the KSR has a standard keyboard, while
the ASR has a Liquid Crystal Diode (LCD) single line
display window.
Figure 1-32.—AN/UGC-143A(V)l receive only-1 (RO1)
teleprinter, or the AN/UGC-143A(V)2 receive only-2
(RO2) teleprinter.
Figure 1-34.—AN/UGC-143A(4 automatic send-receive
(ASR) teleprinter.
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