agile CATV DTV headend, digital qam modulator

Data interface

ASI interface (Asynchronous Serial interface)

Input

Connector

Impedance

Packet format

Access data rate

Max valid bit rate

DVB standard

BNC

75Ω

188/204 bits

270Mbps 

51.6Mbps

Loop output

Connector

Impedance

BNC

75Ω

SPI input interface(Synchronous Parallel interface)

Connector

Packet format

DVB Standard

DB-25 female  

188 or 204 bits

LVDS

IF interface

IF input

Connector

Impedance

IF frequency

BNC

50Ω

35.25/36/36.15/44 MHz (optional)

IF Bandwidth≤8MHz

Reflect loss ≥18dB

Input level

100dBuV (rms)

IF loop output

Connector

BNC

Impedance

IF frequency

IF Bandwidth≤8MHz

Reflect loss ≥18dB

Output level

50Ω

35.25/36/36.15/44 MHz (optional)

100±2dBuV(rms)

RF interface

RF output

Connector

Impedance

Output Frequency

BNC

75Ω

48~800MHz

Reflect loss ≥15dB

Output level  

105~115dBuV (adjustable)

Carrier rejection

SNR(out of band)

> 55dB

≥50dB

RF output for test

Connector

Impedance

Output level

BNC

75Ω

85dBuV~105dBuV (adjustable)

Channel signal encoding

Constellation

Channel encoding

MER

SNR(out of band)

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

RS encode, DVB standard

≥42dB

≥50dB

Network management interface

IEEE802.3 ETHERNET, RJ45 interface

Software protocol

SNMP protocol

Power supply

Voltage

Frequency

Power consumption

165V~265VAC or 85V~265VAC

50Hz±2%

50W

Operation environment

Operation temperature+5~45°C;

Storage temperature

Relative humidity

-25~+55°C.

10~75%

Radiation and safety

Up to GB13837-92 and GB8898-88

E3 /DS3 Interface (optional)

Input (G.703 standard)

Connector

Impedance

BNC

75Ω 

Packet format 188/204 bits

Bit rate

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

Output (loop)

Connector

Impedance

BNC  

75Ω