Connections; Frequency Readout - Icom IC-735 Instruction Manual

RTTY
DEMODULATOR
ITU)
60mA or 20mA
"'"-- LOOP
TTY
MACHINE
SELECTOR
MAGNETS
ttttti
BREAK
SWITCH
PHONE
JACK
AFSK
GENERATOR
C. 2 )
LOOP CURRENT
POWER SUPPLY
ACC (1)
5 - 3 - 1 CONNECTIONS
USING THE AFSK GENERATOR
For RTTY operation, a teletypewriter (or an equivalent) and a
demodulator (terminal unit) which is operational with audio input
are required. Any demodulator with 2125/2295Hz filters (narrow,
170Hz shift) can be used with the IC-735.
0 USING MIC/PHONE JACKS
See page 9 for mic connector connections.
0 USING ACC (1) CONNECTOR
RTTY
DEMODULATOR
ITU)
LOOP CURRENT
POWER SUPPLY
60mA or 20mA
LOOP
TTY
MACHINE
Mt?!
BREAK
SWITCH
SELECTOR
MAGNETS
AFSK
GENERATOR
See page 24 for ACC connector information.
5
-
3
-
2 FREQUENCY READOUT
ED
RECEIVING
®
TRANSMITTING
(1) Place the IC-735 in the LSB mode when operating RTTY using
AFSK.
(2) When operating in this manner, there is a difference between the
display frequency and the actual operating frequency.
Assuming the demodulator mark frequency is 2125Hz and the space
frequency is 2295Hz:
Transmit frequency of contacted station =
Displayed frequency — 2125Hz
Assuming the AFSK generator mark frequency is 2125Hz and the
space frequency is 2295Hz:
Transmit frequency of your station =
Displayed frequency — 2125Hz