1.Introduction

The machine has 3 types of input interfaces: ASI interface,GigE interface and RF make-way-in-the-air signal receiving interface. They can respectively receive signal in the following three ways:

1). Receiving from 4 ASI streams of encoder and multiplexer, by digital demodulating and regenerating,transfer into combiner of 4 ways of RF output after DTMB modulating.

2).Receving from IP unicast(multicast) stream from Gigabit networks, corresponding different IP addresses and interface numbers of program stream,by digital demodulating and regenerating, transfer into combiner of 4 ways of RF output after DTMB modulating. When using IP interface is information source input interface, video and audio stream of IP packaged streams can be seached manually or automatically, and be adapted to appointed DTMB modulating input respectively. The function of mapping with PID Value is generated in the process of adapting.

3).Receiving make-way wireless signal from main station in the air,by digital demodulating and regenerating internal digit,transfer into combiner of 4 ways of RF output after DTMB modulating.

Meanwhile it has 4 ASI output interfaces. When the machines’s input interface is ASI, the interface is ASI stream loop output interface. When the machines’s input signal is Gigabit IP interface, it modulates and outputs its 4 ASI streams.

Features:

●Support huge buffer memory with 64M, and resist the unexpected data.

●QPSK and 16QAM modulating mode.

●RF demodulator mode in the air: supporting DTMB　DVB-S/S2

●Bit rate range of input ASI stream data: 1.5～32Mbps.

●BW range of RF output signal：8MHz(Roll-off factor  0.05)。

●Input/output frequency range: 70～860MHz

●Output level range: 80dBuV～100dBuV(stepping)

●Use LED, monitor the system situation and set the system parameter in real time.

● Remembering the program when lose of power supply

●Using Ethernet interfac to configurine and control the parameters.

2.  Performance Index