Best Data CMX300 User Manual download pdf (Page 28)

20 DOCSIS 1.0 Cable Modem User Guide Rev. 3.0

Appendix A:

Cable Modem Specifications

Table 4. RF Downstream Specification

PARAMETER VA LU E NOTES

Center Frequency 91 MHz to 857 MHz +/- 30 kHz

Level Range -15 dBmV to +15 dBmV One Channel

Symbol Rate 5.056941 Msym/sec (30 Mbps)

5.360537 Msym/sec (43 Mbps)

64QAM

256QAM

Bandwidth 6 MHz

Total Input Power <30 dBmV

Input Impedance 75 Ohms

Input Return Loss >6 dB 88 MHz to

860 MHz

Table 5. RF Upstream Specification

PARAMETER VAL UE NOTES

Frequency 5 MHz to 42 MHz Edge to

Edge

Level Range +8 to +58 dBmV

+8 to +55 dBmV

QPSK

16QAM

Modulation QPSK and 16QAM

Symbol Rate

320K,640K,1280K,2560K,5120Kbps

640K,1280K,2560K,5120K,10240Kbps

QPSK

16QAM

Bandwidth 200K, 400K, 800K, 1600K,

and 3200 KHz

At Edges

Output

d

75 Ohms

Output Return

Loss

>6 dB 5 MHz to

42 MHz

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 34

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