Olivetti d-Color MF4003 Service Manual page 675

d-Color MF4003/MF3303
Bits (LSB-MSB)
17
18
19
20-23
24-26
27
28
29-30
31
32
33
34
35-49
50
51
52-67
68
69-84
85
86-101
102
103-118
119
120-135
136
137-152
153
154-169
170
171-186
187
• *1: 13 and 14 are used when the opposed modem supports up to 1664 points.
• *2: Set to 0 on the transmitting modem.
(7) Re-synchronization procedure / Startup procedure
• A procedure required to switch control channel and main channel in the half-duplex procedure
• A procedure which includes another modulation parameter exchanging is especially called the startup procedure. (used for changing the
communication speed)
(a) Startup procedure
• Control channel startup procedure
• "Control channel re-synchronization procedure" is not used.
(b) Re-synchronization procedure
• Control channel re-synchronization.
• See signals related to control channels
Y119930-3
Value
0 Start bit
1 MP signal type
0 Reserved
1 to 14 Maximum transmission rate from the calling modem to the called modem (x 2400) *1
0,0,0 Reserved
0/1 Control channel data transmission rate
which is selected by the opposed
transmitter
0 Reserved
Trellis coding device selection *2
0/1 Non-linear encoder parameter selection
for the terminal transmitter of a remote
station *2
0/1 Parameter (shaping) selection when the
data rate is determined within each
symbol rate *2
0 Reserved
0 Start bit
Communication speed mask (Bit
35=2400 bps ... Bit 46=28.8 kbps, Bit
47=31.2 kbps, Bit 48=33.6 kbps and Bit
49=Reserved)
0/1 Use of control channel imbalance data
rate
0 Start bit
Pre-coding coefficient h (1) Real
0 Start bit
Pre-coding coefficient h (1) Imaginary
0 Start bit
Pre-coding coefficient h (2) Real
0 Start bit
Pre-coding coefficient h (2) Imaginary
0 Start bit
Pre-coding coefficient h (3) Real
0 Start bit
Pre-coding coefficient h (3) Imaginary
0 Start bit
Reserve
0 Start bit
CRC
0 Fill Bits
(By exchanging MPh, the communication speed is changed.)
for signal names and change method.
Meaning
• 0: 1200 bps
• 1: 2400 bps
• 00: 16 state
• 10: 32 state
• 01: 64 state
• 11: Reserved
• 0: φ=0
• 1: φ=0.3125
• 0: Minimum
• 1: Expanded
• 0: Ability of both modems disabled
• 1: Enabled
• 0: No
• 1: Yes
P-101
P THEORY OF OPERATION > 8. FK-517
Service Manual