Canon FAX L1000 Service Manual page 226

FAX-L1000 Chapter 3: Technical Reference
b-3) Primary channel equalizer training (Phase 3)
Filters, such as equalizers, are trained (adjusted) with the parameters set in phase 2.
• Transmitter
Signal
S signal
S signal
PP signal
TRN signal
b-4) Control channel start-up (Phase 4)
Select the maximum data signalling rate and trellis encoder and set the data signalling rate
that can be supported.
• Transmitter/receiver
Signal
PPh signal
ALT signal
Modulation
parameter
E sequence
Abbre-
viation Meaning
S Short training
S
PP The other modem uses
this signal to train the
equalizer.
TRN The receiver uses this
signal to determine the
transmission speed.
Abbre-
viation Meaning
PPh The other modem uses
this signal to train the
equalizer.
ALT
———
MPh Indicate the image
transmission parameters,
such as maximum data
signal speed, control
channel data signal speed,
trellis coding type, pre-
coding type, and baud
rate.
E
———
3-82
Remarks
The phase of S
is shifted from
the phase of S.
Remarks
20-bit sequence
of binary 1's.