1-1
System Description
602-13729-01 Rev B
Expedio Digital Electronic News Gathering Radio
1 System
Description
1.1 Introduction
The digital system comprises of a Transmitter and a Receiver, whose output RF
frequency is in the Band 1.9GHz to 2.9GHz. The RF band is approximately 300MHz.
Transmitter is comprised of a MPEG2 Video Encoder which will take composite
Video and digitize this and compressed, the output transport stream [DVB-TS] is then
converted to DVB-ASI, which is then Modulated with COFDM (or any other digital
modulators). The COFDM modulator is compliant to DVB-T non-hierarchical modes.
This modulated signal is then converted to the appropriate with an IF of 480MHz thus
providing the means to tune over a band at the RF signal.
Receiver will down convert from the RF signal to an IF of 480MHz. This IF is then
demodulated providing a DVB-TS. This data stream is then MPEG2 Video Decoded
and provided as analogue Video output, together with the Audio channels.
Figure 1: Expedio Modular Open Architecture
