Sharp FO-5700, Руководство по обслуживанию, Страница: 48 / 140

FO-5700U
5 – 4
(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.
Table 1-1. Configurations, Signaling Rates, and Data Rates
V. 34 33600 TCM TCM Note 2 33600 3429 only Note 2 Note 2 Note 2
V. 34 31200 TCM TCM Note 2 31200 Note 2 Note 2 Note 2 Note 2
V. 34 28800 TCM TCM Note 2 28800 Note 2 Note 2 Note 2 Note 2
V. 34 26400 TCM TCM Note 2 26400 Note 2 Note 2 Note 2 Note 2
V. 34 24000 TCM TCM Note 2 24000 Note 2 Note 2 Note 2 Note 2
V. 34 21600 TCM TCM Note 2 21600 Note 2 Note 2 Note 2 Note 2
V. 34 19200 TCM TCM Note 2 19200 Note 2 Note 2 Note 2 Note 2
V. 34 16800 TCM TCM Note 2 16800 Note 2 Note 2 Note 2 Note 2
V. 34 14400 TCM TCM Note 2 14400 Note 2 Note 2 Note 2 Note 2
V. 34 12000 TCM TCM Note 2 12000 Note 2 Note 2 Note 2 Note 2
V. 34 9600 TCM TCM Note 2 9600 Note 2 Note 2 Note 2 Note 2
V. 34 7200 TCM TCM Note 2 7200 Note 2 Note 2 Note 2 Note 2
V. 34 4800 TCM TCM Note 2 4800 Note 2 Note 2 Note 2 Note 2
V. 34 2400 TCM TCM Note 2 2400 Note 2 Note 2 Note 2 Note 2
V. 23 1200/75 FSK 1700/420 1200/75 1200 1 0 –
V. 21 FSK 1080/1750 0-300 300 1 0 –
V. 17 14400 TCM TCM 1800 14400 2400 6 1 128
V. 17 12000 TCM TCM 1800 12000 2400 5 1 64
V. 17 9600 TCM TCM 1800 9600 2400 4 1 32
V. 7200 TCM TCM 1800 7200 2400 3 1 16
V. 29 9600 QAM 1700 9600 2400 4 0 16
V. 29 7200 QAM 1700 7200 2400 3 0 8
V. 29 4800 QAM 1700 4800 2400 2 0 4
V. 27 4800 DPSK 1800 4800 1600 3 0 8
V. 27 2400 DPSK 1800 2400 1200 2 0 4
V. 21 Channel 2 FSK 1750 300 300 1 0 –
Carrier Frequency Data Rate (bps) Symbol Rate Bits/Symbol - Bits/Symbol - Constellation
Configuration Modulation 1 (Hz)
±
0.01%
±
0.01% (Symbols/Sec.) Data TCM Points
Notes:
1. Modulation legend: TCM: Trellis-Coded Modulation QAM: Quadrature Amplitude Modulation
FSK: Frequency Shift Keying DPSK: Differential Phase Shift Keying
2. Adaptive; established during handshake:
Carrier Frequency (Hz)
Symbol Rate (Baud) V. 34 Low Carrier V.34 High Carrier
2400 1600 1800
2800 1680 1867
3000 1800 2000
3200 1829 1920
3429 1959 1959