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CM280 Cable Modem

ACT’s CM280 DOCSIS Cable Modem delivers high speed data access to cable service subscriber’s home or small business. Designed with Ethernet interface, the CM280 conforms to MCNS/EURO DOCSIS 2.0 standards and can be connected to CMTS (Cable Modem Termination systems, Head - End) from different manufacturers which conform to the DOCSIS 2.0 standard.

•    Supports MCNS/EURO DOCSIS 2.0 standards

•    Up to 50 Mbps downstream data rate

•    Up to 30 Mbps upstream data rate

•    High Speed Internet via 4 ports 10/100Base-T Ethernet (RJ-45)

•    User friendly LED interface

•    Simple installation


Section

Parameter

Specification


Interfaces

RF IN

F-Type RF connector


Ethernet

10/100 BASE-T


Downstream

Input Frequency Range

108 MHz ~ 860 MHz


Modulation

64 QAM / 256 QAM


Input Signal 

-17 dBmV ~ +17 dBmV


Symbol Rate

NA

5.056941 Msym/sec (64 QAM)

5.360537 Msym/sec (256 QAM)

Euro

6.952 Msym/sec (64 QAM)

6.952 Msym/sec (256 QAM)

Bandwidth

NA

6 MHz

Euro

8 MHz

Input Impedance

75 ohms


Input Return Loss

<-8 dB


Upstream

Frequency

5 MHz ~ 65 MHz


Level Range

TDMA

+8 ~ +54 dBmV (32 QAM, 64 QAM)

+8 ~ +55 dBmV (8 QAM, 16 QAM)

+8 ~ +58 dBmV (QPSK)

S-CDMA

+8 ~ +53 dBmV

Output Signal Level

QPSK

+8 dBmV ~ 58 dBmV (QPSK)

16 QAM

+8 dBmV ~ 55 dBmV (16 QAM)

Modulation

QPSK / 8 QAM / 16 QAM / 32 QAM / 64 QAM / 128 QAM

Symbol Rate

TDMA: 160, 320, 640, 1280, 2560 ksymb/sec

S-CDMA: 1280, 2560, 5120 ksymb/sec

Bandwidth

TDMA: 200, 400, 800, 1600, 3200, 6400 kHz

S-CDMA: 1600, 3200, 6400 kHz

Impedance

75 Ω


Output Return Loss

<-10 dB 


Power Supply 

Input: 100 ~ 240V, 50/60 Hz  

Output: DC 12V/1A

Working Environment

Operating free-air temperature range  0°C ~ +50 °C

Storage -20°C ~ +85 °C






 


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