COL5500 QPSK digital TV modulator adopts advanced digital signal processing technology, of which receiving port can directly use digital satellite receiver for receiving, thus fully complying DVB-S standard. Not only can it gain relatively high frequency spectrum usage ratio, having very strong anti-interference and relatively high price performance ratio, but also it can well comply analogue FM microwave equipment.

COL5500 QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution coding, and pre-modulating baseband shaping processing, etc. all these contribute a high guarantee to the data transmitting performance. In a word, its a high performance QPSK modulator fortransmitting digital TV and other digital signal.

Frequency: 50Hz±2%

 Data interface

A:Input:

Connector: BNC

Impedance: 75Ω

Packet format: 188/204 bits

Access data rate: 270Mbps 

Max valid bit rate: 60Mbps

DVB standard

B: Loop output:

 Connector: BNC

 Impedance: 75Ω

Connector: DB-25 female  

Packet format: 188 or 204 bits

DVB Standard: LVDS

A. RF output:

Connector: BNC

Impedance: 75Ω

Output Frequency: 250MHz~500MHz, 450MHz~950MHz,950MHz~1800MHz(Supplied by different unit)

Reflect loss ≥15dB

Output level: 100~110dBuV (adjustable)

Carrier rejection: > 55dB

SNR(out of band):≥45dB

B: RF output for test

Connector: BNC

Impedance: 75Ω

Output level: 85dBuV~100dBuV (adjustable)

  Channel signal encoding

Constellation: QPSK

Channel encoding: RS encode, DVB-S standard

MER:≥40dB

SNR(out of band):≥45dB

  Network management interface

IEEE802.3 ETHERNET, RJ45 interface

Software protocol: SNMP protocol

  Network management interface

IEEE802.3 ETHERNET, RJ45 interface

Software protocol: SNMP protocol

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

Power consumption: 50W

  Operation environment

Operation temperature: +5~45°C;

Storage temperature: -25~+55°C.

Relative humidity: 10~75%