1. Overview

The ASI-to-4E1 bidirectional adapter developed and manufactured by Beijing Huachuang TV is a high cost-effective signal adapter based on the basic idea of transmitting digital TV program signals in telecommunication networks. It can convert ASI and TS bitstream to E1 interface signals in SDH/PDH networks and realize signal format adaptation between heterogeneous networks. . The E1 network adapter is capable of adapting four E1 channels in two directions for transmitting a standard definition digital TV program.

2, performance characteristics

Interface meets G.703 E1 standard

Two way adaptation function of E1 and MPEG-2 TS

Support FEC, RS error correcting codes.

ASI transport stream speed/burst format adaptation

The network management interface is convenient for remote management.

Full hardware implementation, high efficiency and stability;

? super cache, mosaic against burst code.

? anti network delay, no packet loss.

Real-time bit stream monitoring;

Support network management for local and remote control.

Chinese and English LCD display is easy and flexible to operate.

High reliability design and stable operation.

3 technical specifications

3.1 interface

A, input (G.703 standard)

Socket: BNC

Impedance: 75 ohms

Package format: 188 or 204 bytes

Data rate: E1 no frame format (2Mbps)

B, output (loop output)

Socket: BNC

Impedance: 75 ohms

3.2ASI interface

Input interface: 4 ASI and 8 E1

Connector: BNC

Impedance: 75

Transport stream standard: ISO13818-1

Input effective code rate: Max 2Mbps

TS package format: 188/204bytes (automatic identification)

TS input mode: uniform / packet bursts / irregularities

3.3 network management interface

Ethernet interface: IEEE802.3 Ethernet, RJ45 interface

Software protocol: UDP/IP

3.4 power down state preservation

The last use state can be saved, so the encoder can start correctly after the power failure is resumed.

3.5 power supply

Voltage: 90V ~ 250VAC

Frequency: 50Hz 2%

Power consumption: 20W



3.6 working environment

Ambient temperature: + 5 C to 45 C

Storage temperature: - 25 to C to +55 C

Relative humidity: 10 ~ 75%



3.7 radiation and safety requirements

Conforms to GB13837-92 and GB8898-88 standards.



3.8 mechanical properties

44.5mm (high, 1U) x 483mm (wide, 19 ") * 410mm (deep)