RF Central RFX-BRK Especificações descarregar pdf (Página 6)

RFX-BRK Issue 1 page 6 of 19

2 INTRODUCTION

The RF Central RFX-BRK ultra compact transmitter is designed for all applications, both

indoor and outdoor, in which a very small light weight transmitter is essential to the

operation. The unit features a comprehensive range COFDM modulation formats, QPSK

16QAM, 64QAM. Set-up of the unit – e.g. RF channel, MPEG coding profile, COFDM

modulation format – is via the 16 position rotary switch on the front panel. PC software is

supplied to allow RF channel and COFDM modulation parameters to be pre-programmed

for each of the 16 preset positions.

The transmitter is a single miniature unit that contains a MPEG2 video encoder, audio

encoder, COFDM modulator, RF power amplifier and power supplies, all of which are

mounted on a single printed circuit broad inside the case.

The transmitter is designed to accept analogue video (NTSC or PAL) and 2 analogue

audios at line level. Powering is +9 to 18 VDC.

The unit can be used with a variety of RF Central antennas:

 ”F1 patch”, a small low profile antenna which matches the ultra compact features of the

transmitter

 Omni antennas are typically used for ground based fixed and mobile operations, or

helicopter air to ground

 Low profile antennas are used for up-linking ground to air, or on-board linking

 Helix antennas offer increased gain and directivity

 Fan-beam antennas offer increased gain and 90 degree sector coverage.

 GPS steered antenna, for helicopter air to ground

 Parabolic antennas offer the highest gain, and longest operational range

At the receive site a range of RF Central digital receivers may be used. Please consult the

separate

RF Central manual for information detailing the operation of receivers.

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RF Central RFX-BRK Especificações Página 6