Sharp FO-5700 Service Manual page 48

FO-5700U
(2) Image memory block
This block is composed of memory PWB circult.
Refer to [2'] Circuit description of memory PWB for the details.
(3) Modem block
The block is mainly composed of the modem R288F (IC41), and is pro-
vided with the following modem function.
Configuration Modulation 1
V. 34 33600 TCM TCM
V. 34 31200 TCM TCM
V. 34 28800 TCM TCM
V. 34 26400 TCM TCM
V. 34 24000 TCM TCM
V. 34 21600 TCM TCM
V. 34 19200 TCM TCM
V. 34 16800 TCM TCM
V. 34 14400 TCM TCM
V. 34 12000 TCM TCM
V. 34 9600 TCM TCM
V. 34 7200 TCM TCM
V. 34 4800 TCM TCM
V. 34 2400 TCM TCM
V. 23 1200/75 FSK
V. 21 FSK
V. 17 14400 TCM TCM
V. 17 12000 TCM TCM
V. 17 9600 TCM TCM
V. 7200 TCM TCM
V. 29 9600 QAM
V. 29 7200 QAM
V. 29 4800 QAM
V. 27 4800 DPSK
V. 27 2400 DPSK
V. 21 Channel 2 FSK
Notes:
1. Modulation legend: TCM:
FSK:
2. Adaptive; established during handshake:
Symbol Rate (Baud)
2400
2800
3000
3200
3429
Table 1-1. Configurations, Signaling Rates, and Data Rates
Carrier Frequency Data Rate (bps)
± ±
(Hz) 0.01% 0.01%
Note 2 33600
Note 2 31200
Note 2 28800
Note 2 26400
Note 2 24000
Note 2 21600
Note 2 19200
Note 2 16800
Note 2 14400
Note 2 12000
Note 2
Note 2
Note 2
Note 2
1700/420 1200/75
1080/1750 0-300
1800 14400
1800 12000
1800
1800
1700
1700
1700
1800
1800
1750
Trellis-Coded Modulation
Frequency Shift Keying
Carrier Frequency (Hz)
V. 34 Low Carrier V.34 High Carrier
1600
1680
1800
1829
1959
Symbol Rate Bits/Symbol -
(Symbols/Sec.)
3429 only Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
9600 Note 2 Note 2
7200 Note 2 Note 2
4800 Note 2 Note 2
2400 Note 2 Note 2
1200 1
300 1
2400 6
2400 5
9600 2400 4
7200 2400 3
9600 2400 4
7200 2400 3
4800 2400 2
4800 1600 3
2400 1200 2
300 300 1
QAM: Quadrature Amplitude Modulation
DPSK: Differential Phase Shift Keying
1800
1867
2000
1920
1959
5 – 4
Bits/Symbol - Constellation
Data TCM
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
Note 2 Note 2
0 –
0 –
1 128
1 64
1 32
1 16
0 16
0 8
0 4
0 8
0 4
0 –
Points