TM 11-5805-424-15/NAVELEX 0967-220-9010/TO 31W2-2G-41
to Commander, US Army Communications-Electronics
enemy use shall be in accordance with TM 750-244-2.
Command and Fort Monmouth, ATTN: AMSEL-ME-MP,
1-3.4.
Reporting Equipment Improvement
Fort Monmouth, New Jersey 07703-5007. We'll send
Recommendations (EIR)
you a reply.
a. Army. If your equipment needs improvement,
b. Air Force: Air Force personnel are encouraged
let us know. Send us an EIR. You, the user, are the
to submit EIR's in accordance with AFR 900-4.
only one who can tell us what you don't like about your
c. Navy.
Navy personnel are encouraged to
equipment. Let us know why you don't like the design.
submit EIR's through their local Beneficial Suggestion
Put it on an SF 368 (Quality Deficiency Report). Mail it
Program.
Section II. DESCRIPTION AND DATA
repeater facilities may be used in multiplex systems by
1-4. Purpose and Use
use of two MD674(P)/G's (back-to-back) for each
a. The MD-674(P)/G provides a single-channel
channel. An order-wire teletypewriter communications
terminal facility for transmission of serial digital
facility is provided with an automatic break-in.
information over a four-wire, voice-frequency (vf) circuit
b. The baud rate and audiofrequency of the MD-
674(P)/G are determined by the type of Modem
Group OA-8072/G to supply a stable station clock
Subassembly MX-73(*)/G installed in the MD-674(P)/G.
signal, as shown at site A; or a station clock signal from
The chart below indicates the MX-73(*)/G's available for
another equipment, as shown at site B. MD-674(P)/G's
each baud rate, the voice frequency of each MX-
may be used to provide multiplex terminal facilities (fig.
73(*)/G, and indicates whether delay equalization is
fixed, optional, or adjustable with the MX-73(*)/G. Any
Subassembly MX-73(*)/G (b below), and the combined
MX-73(*)/G may be used for any baud rate below its
baud rate of the MD-674(P)/G's does not exceed 1,200
baud rate. That is, a 600 baud MX-73(*)/G may be used
baud (c below). Two MD-674(P)/G's may also be used
for a 300 or 150 baud rate with the channel frequencies
as a repeater facility in a single channel system (no
remaining the same for each rate.
multiplexing) as shown in figure 1-11. Multiple channel
Audiofrequency (cps)
Delay
Baud rate
MX-73(*)/G
Mark
Center
Space
150
MX-7372/G...................
425 ..................
10 ..................
595.......................
Fixed.
MX-7374/G...................
765 ..................
850 ..................
935.......................
Fixed.
MX-7376/G...................
1,105 ..................
1190 ..................
1,275.......................
Fixed.
MX-7378/G...................
1,445 ..................
1,553 ..................
1,615.......................
Fixed.
MX-7380/G...................
1,785 ..................
1,870 ..................
1,955.......................
Fixed.
MX-7382/G...................
2,125 ..................
2,210 ..................
2,295.......................
Fixed.
MX-7384/G...................
2,465 ..................
2,550 ..................
2,635.......................
Fixed.
MX-7386/G...................
2,805 ..................
2,890 ..................
2,975.......................
Fixed.
300
MX-7373/G...................
510 ..................
80 ..................
850.......................
Optional.
MX-7377/G...................
1,190 ..................
1,360 ..................
1,530.......................
Fixed.
MX-7381/G...................
1,870 ..................
2,040 ..................
2,210.......................
Fixed.
MX-7385/G...................
2,550 ..................
2,720 ..................
2,890.......................
Optional.
600
MX-7375/G...................
680 ..................
1,020 ..................
1,360.......................
Optional.
MX-7383/G...................
2,040 ..................
2,380 ..................
2,720.......................
Optional.
1,200
MX-7379/G...................
1,200 ..................
1,800 ..................
2,400.......................
Adjustable.
Change 6 1-2
