Canon PowerShot G3, Error Code List, Page: 288 / 310

Appendix
A-11
2.12 Signals Transmitted by the Receiver (unique to the V.34 procedure)
INFO0a (INFO Sequence)
It is used to communicate modem capabilities (modulation speed, frequency transmis-
sion).
A/A
_
(Tone A/Tone A
_
)
It is a 2400-Hz tone signal used to synchronize modems. A
_
is a signal obtained by rotating
the phase of A by 180 degree.
INFO0h (INFO sequence)
It is used to communicate the modulation speed and the pre-emphasis filter used for data
transfer based on the results of analysis of the line probing signals of the transmitter.
2.13 Signals Transmitted by the Transmitter/Receiver
(unique to the V.34 procedure)
PPh (PPh Signal)
It is used for the training of the equalizer by the modem of the other party.
ALT (ALT Signal)
It consists of alternately scrambled binary 0s and 1s.
MPh (Modulation Parameter)
It is used to indicate the parameters used for image transfer, e.g., type of pre-coding, type
of trellis coding, and maximum data signal speed.
E (E Sequence)
It is a 20-bit sequence of binary 1's.
flags
It is a continuous transmission of 7Eh used to maintain synchronization.
Sh/S
_
h
_
(Sh Signal /S
_
h
_
Signal)
It is a short training signal. S
_
h
_
is a signal obtained by changing the phase of Sh.