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Configuration: Basic Gateway TCP/IP Wireless USB
Cable Modem
Downstream
Modulation
64 QAM or 256 QAM
Maximum data rate
38 Mbps
Frequency
88 MHz to 860 MHz (30 kHz minimum step size)
Bandwidth
6 MHz
Maximum symbol rate
5.069 Msym/s (64 QAM)
5.361 Msym/s (256 QAM)
Operating level range
-15 dBmV to +15 dBmV
Input impedance
75 ohms (nominal)
Frequency range
88 to 860 MHz
Upstream
Modulation
QPSK, 16 QAM, 32 QAM, 64 QAM, or 128 QAM
Modulation rate
(nominal)
TDMA: 160, 320, 640, 1280, 2560, and 5120 KHz
S-CDMA: 1280, 2560, and 5120 KHz
Maximum data rate
30 Mbps
Bandwidth
TDMA: 200, 400, 800, 1600, 3200, and 6400 kHz
S-CDMA: 1600, 3200, and 6400 kHz
Frequency
5 MHz to 42 MHz (edge to edge)
Symbol rates
160, 320, 640, 1280, and 2560 ksym/s
Operating level range
(one channel)
TDMA:
• +8 dBmV to +54 dBmV (32 QAM, 64 QAM)
• +8 dBmV to +55 dBmV (8 QAM, 16 QAM)
• +8 dBmV to +58 dBmV (QPSK)
S-CDMA:
• +8 dBmV to +53 dBmV (all modulations)
Output impedance
75 ohms nominal
Output return loss
> 6 dB (5 to 42 MHz)
General
Cable interface
F-Connector, female, 75 ohm
CPE network interface
USB, Ethernet 10/100Base-T (auto sensing)
Data protocol
TCP/IP
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SBG900 User Guide