User Guide

21
Wireless Cable Modem User’s Manual
Product Specifications
RF Receiver/Transmitter Specifications
Downstream (Receiver) Upstream (Transmitter)
Frequency Range • 88 to 860 MHz • 5 to 42 MHz
Modulation • 64QAM • QPSK
• 256QAM • 16QAM
Signal Rate • 30Mbps/64QAM • QPSK 320Kps to 5.12Mbps
• 42.8Mbps/256QAM • 16QAM 640Kbps to 10.24Mbps
Channel Bandwidth • 6MHz • 200K, 400K, 800K 1.6M, 3.2MHz
FEC • RS (128, 122) Trellis • Reed Solomon
Receive Level • -15 — +15dBmV • QPSK: +8 — +58dBmV
(Digital Signal) • 16QAM: +8 — +55dBmV
Security • DES decryption: DOCSIS Baseline Privacy (BPI), 56-bit DES and 168-bit triple-DES en-
cryption, as controlled by the headend and configuration files