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G3 FACSIMILE COMMUNICATIONS
In the control channel, signals which differ according to the frequencies of
both TX and RX are output. It follows that the effects of the echo are not
received because the frequencies of the signal returned by echo and the
signal output by the other machine are different.
• Primary channel resyncronization procedure
Training is performed with the parameters set in phase 4.
The transmission speed is 1200bps.
Transmitter
• Image data
Transmit image data.
Transmitter
5–82
Abbre-
Signal
viation
S signal
S
S signal
S
PP signal
PP
Sequence B1
B1
Abbre-
Signal
viation
Image data
Image
data
—
Turn-
off
Meaning
Short training
The other modem uses
this signal to train the
equalizer.
Scramble data frame
transmitted at the end
of start-up protocol.
Meaning
Encoded image data
—
Remarks
The phase of S is
shifted from the
phase of S.
Remarks
Send scrambled
1's for 35 ms.
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