Ericsson RX1290 Guia do Utilizador descarregar pdf (Página 15)

Introduction

Reference Guide: RX1290 H.264 Contribution Receiver Page 1-7

ST.RE.E10228.1

1.3.2 Input Connections

The Satellite Receiver interfaces directly to Low-Noise Block (LNB) and accepts an

intermediate frequency (IF) input in the band 950 - 2150 MHz (L-band) for operation in the

specified symbol-rate range (see Annex B, Technical Specification). The unit can provide dc

power and polarisation switching to the LNB.

1.3.3 What the Satellite Receiver Does

The Receiver can be tuned to a specified satellite channel frequency and polarisation. The

input is down-converted via a Low-Noise Block (LNB) to provide an L-band input to the

Receiver. The front-end tuning is microprocessor controlled with a frequency synthesised local

oscillator. A software tuning and acquisition algorithm resolves translation errors (mainly due

to the LNB).

The signal is then passed to a demodulator that recovers the signal using soft-decision

decoding. The resulting stream is Reed-Solomon decoded and descrambled to provide inputs

to the Decoder circuit. The received channel may contain multiple Services, therefore the

Receiver’s demultiplexer is configured to select a single video Service and other audio/data

components and present them at the output.

Figure 1.3: What the Satellite Receiver Does

RX1290 Contribution Receiver

n+1

n+2

n+3

n+4

horizontal

polarisation

vertical

polarisation

SHF

Low-Noise Block

L-band

Tune to a

satellite

channel

Select a

Service from

the satellite

channel

Multiple satellite channels

Multi

le Services on the tuned satellite channel

Select the

components from

the chosen Service

Multiple components on the selected Service

Video

udio

Data

Transport Stream

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 135 136

Comentários a estes Manuais

Sem comentários

Ericsson RX1290 Guia do Utilizador Página 15

Comentários a estes Manuais

Manuais e produtos relacionados com Recetor Ericsson RX1290