COL5400A QAM Modulator, is the main equipment CATV digital head-end, receiving DVB transport streams which come from coder, multiplexer, DVB gateway, scrambler, video server etc. It does signal processing like RS coding, convolution interleaving and QAM modulating, providing IF/RF output.

High reliability design, stable in running

 

A:Input:

Connector: BNC

Impedance: 75Ω

Packet format: 188/204 bits

Access data rate: 270Mbps 

Max valid bit rate: 51.6Mbps

DVB standard

B: Loop output:

 Connector: BNC

 Impedance: 75Ω

Connector: DB-25 female  

Packet format: 188 or 204 bits

DVB Standard: LVDS

 IF interface

A: IF input

Connector: BNC

Impedance: 50Ω

IF frequency: 35.25/36/36.15/44 MHz (optional)

IF Bandwidth≤8MHz

Reflect loss ≥18dB

Input level: 100dBuV (rms)

B: IF loop output:

Connector: BNC

Impedance: 50Ω

IF frequency: 35.25/36/36.15/44 MHz (optional)

IF Bandwidth≤8MHz

Reflect loss ≥18dB

Output level: 100±2dBuV(rms)

  RF interface

A. RF output:

Connector: BNC

Impedance: 75Ω

Output Frequency: 48~800MHz

Reflect loss ≥15dB

Output level:

105~115dBuV (adjustable)

Carrier rejection: > 55dB

SNR(out of band):≥50dB

B: RF output for test

Connector: BNC

Impedance: 75Ω

Output level: 85dBuV~105dBuV (adjustable)

 Channel signal encoding

Constellation: 16QAM, 32QAM, 64QAM, 128QAM, 256QAM.

Channel encoding: RS encode, DVB standard

MER:≥42dB

SNR(out of band):≥50dB

  Network management interface

IEEE802.3 ETHERNET, RJ45 interface

Software protocol: SNMP protocol

  Power supply

Voltage:      165V~265VAC or 85V~265VAC

Power consumption: 50W

  Operation environment

Operation temperature: +5~45°C;

Storage temperature: -25~+55°C.

Relative humidity: 10~75%

 Radiation and safety

Up to GB13837-92 and GB8898-88

 E3 /DS3 Interface (optional)

A: Input (G.703 standard)

Connector: BNC

Impedance: 75Ω 

Packet format 188/204 bits

Bit rate: E3/DS3 No-frame format (34.368Mbps/44.736Mbps)

B. Output (loop)

Connector: BNC 

Impedance: 75Ω