d-Color MF4003/MF3303
P THEORY OF OPERATION > 8. FK-517
P-101
Bits (LSB-MSB)
Value
Meaning
17
0
Start bit
18
1
MP signal type
19
0
Reserved
20-23
1 to 14
Maximum transmission rate from the calling modem to the called modem (x 2400) *1
24-26
0,0,0
Reserved
27
0/1
Control channel data transmission rate
which is selected by the opposed
transmitter
• 0: 1200 bps
• 1: 2400 bps
28
0
Reserved
29-30
Trellis coding device selection *2
• 00: 16 state
• 10: 32 state
• 01: 64 state
• 11: Reserved
31
0/1
Non-linear encoder parameter selection
for the terminal transmitter of a remote
station *2
• 0:
φ
=0
• 1:
φ
=0.3125
32
0/1
Parameter (shaping) selection when the
data rate is determined within each
symbol rate *2
• 0: Minimum
• 1: Expanded
33
0
Reserved
34
0
Start bit
35-49
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: Ability of both modems disabled
• 1: Enabled
50
0/1
Use of control channel imbalance data
rate
• 0: No
• 1: Yes
51
0
Start bit
52-67
Pre-coding coefficient h (1) Real
68
0
Start bit
69-84
Pre-coding coefficient h (1) Imaginary
85
0
Start bit
86-101
Pre-coding coefficient h (2) Real
102
0
Start bit
103-118
Pre-coding coefficient h (2) Imaginary
119
0
Start bit
120-135
Pre-coding coefficient h (3) Real
136
0
Start bit
137-152
Pre-coding coefficient h (3) Imaginary
153
0
Start bit
154-169
Reserve
170
0
Start bit
171-186
CRC
187
0
Fill Bits
• *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
(By exchanging MPh, the communication speed is changed.)
• “Control channel re-synchronization procedure” is not used.
(b) Re-synchronization procedure
• Control channel re-synchronization.
• See
signals related to control channels
for signal names and change method.
Y119930-3
Service Manual
Содержание d-Color MF 4003
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