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When using a high speed relay
When using a level converter
73
12
SETUP AND CONNECTIONS
12-8
RTTY connections
1
2
3
4
5
6
7
8
BREAK SWITCH
SELECTOR
MAGNETS
RTTY
DEMODULATOR
(TU)
LOOP CURRENT
POWER SUPPLY
1RTTY
5AF
2GND
AF
POLAR
RELAY
60 mA or 20 mA LOOP
TTY
MACHINE
ACC(1) SOCKET
1
2
3
4
5
6
7
8
BREAK SWITCH
SELECTOR
MAGNETS
RTTY
DEMODULATOR
LOOP CURRENT
POWER SUPPLY
1RTTY
5AF
2GND
AF
60
mA or
20
mA LOOP
TTY
MACHINE
ACC(1) SOCKET
PHOTO
COUPLER
+5 V
LEVEL CONVERTER
When operating RTTY, a teletype and demodulator,
etc. must be connected as in the diagrams below. The
demodulator operates via audio input with a receive
tone of 2125 Hz (or 1275 or 1615) and a shift offset of
170 Hz (or 200 or 425 Hz). See p. 29 for details on how
to change the receive tone or shift offset.
75


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