15
4 SYSTEM
INTERCONNECTIONS
below.
@When using a high-speed relay
TTY
RTTY
DEMODULATOR
(TU)
SELECTOR
MAGNETS
LOOP CURRENT
POWER SUPPLY
eWhen using a level converter
TTY
MACHINE
SELECTOR
MAGNETS
PHOTO
COUPLER
LEVEL CONVERTER
eWhen using an AFSK generator
ACC(1
i
AFSK
keying signal
( ) SOCKET
Pin 4
ACC(1)
SOCKET
Pin 3
RTTY Terminal Unit
AFSK receive signal
ACC(1)
SOCKET
Pin 5
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