User's Manual

Cable RG User Manual
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Specifications
Cable RF:
Downstream Upstream
Operating Frequency Range 69-873MHz 5-55MHz
Frequency Channel HRC, IRC, STD
Frequency Selection Auto Scanning Controlled by Headend
Bandwidth 6MHz Programmable (200*N KHz)
N=1, 2, 4, 8, 16, 32
Characteristic Impedance
75
Ω
Nominal 75
Ω
Nominal
Signal Level Range -15 to +15dBmV/64QAM
-15 to +15dBmV/256QAM
A-TDMA:
+8 to +58dBmV/QPSK
+8 to +55dBmV/(8,16)QAM
+8 to +54 dBmV/(32,64)
QAM
S-CDMA:
+8 to +53 dBmv/All
Modulation 64QAM/256QAM QPSK/16,32,64QAM
128QAM for TCM Only
Modulation Rate 5.056941/5.360537
Msym/sec
A-TDMA:
160/320/640/1280/2560/5120
Ksym/sec
S-CDMA:
1280/2560/5120 Ksym/sec
Maximum Bit Rate 42.88Mbps/256QAM
30.34Mbps/64QAM
30.72Mbps/64QAM
Forward Error Correction (FEC) RS(128,122)/Trellis Reed Solomon
Signal to Noise Ratio (SNR) >30
Bit Error Rate (BER)
1
×
10
-8
@ C/N=23.5dB,
64QAM with FEC
1
×
10
-8
@ C/N=30dB,
256QAM with FEC,
received power = -6dBmV
to +15dBmV
1x10
-8
@ C/N=33dB,
256QAM with FEC,
received power = -15dBmV
to –6dBmV