Motorola SBG6580 Series Manual do utilizador - Página 30
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UPSTREAM
Modulation
Maximum Channel Rate
DOCSIS
EuroDOCSIS
Channel Width
Symbol Rates
Operating Level Range
DOCSIS/EuroDOCSIS
TDMA
S-CDMA
Level range per channel (two channels in the TCS)
TDMA
S-CDMA
Level range per channel (three or four channels in the TCS)
TDMA
S-CDMA
Output Impedance
Product Specifications •
Motorola SURFboard • User Guide
QPSK and 8, 16, 32, 64, 128 QAM
131.072 Mbps (4 channels) / 32.768 Mbps (single channel): @ 128 QAM at 6.4 MHz
131.072 Mbps (4 channels) / 32.768 Mbps (single channel): @ 128 QAM at 6.4 MHz
200 kHz, 400 kHz, 800 kHz, 1.6 MHz, 3.2 MHz, 6.4 MHz
160, 320, 640, 1280, 2560, 5120 ksym/s
Level range per channel (Multiple Transmit Channel mode disabled, or only Multiple Transmit
Channel mode enabled with one channel in the TCS)
Pmin to +57 dBmV (32 QAM, 64 QAM)
Pmin to +58 dBmV (8 QAM, 16 QAM)
Pmin to +61 dBmV (QPSK)
Pmin to +56 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate
Pmin to +54 dBmV (32 QAM, 64 QAM)
Pmin to +55 dBmV (8 QAM, 16 QAM)
Pmin to +58 dBmV (QPSK)
Pmin to +53 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate
Pmin to +51 dBmV (32 QAM, 64 QAM)
Pmin to +52 dBmV (8 QAM, 16 QAM)
Pmin to +55 dBmV (QPSK)
Pmin to +53 dBmV (all modulations), where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate
75 Ω (nominal)
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