By Jonathan Higgins
A very good primer at the topic, this e-book provides starting execs in satellite tv for pc newsgathering an creation to the applied sciences and approaches concerned. it's going to additionally swimsuit newshounds, editors and manufacturers wanting to appreciate this significant portion of the newsgathering chain. Written for the whole newbie, the booklet exhibits how standard transmission chains paintings and their conversation with the studio. It additionally deals a quick advent to analogue and electronic conception earlier than going onto to give an explanation for digital Newsgathering (ENG) platforms: from uncomplicated ideas: transmission and reception chains, frequencies used and why, via to audio channel, subcarriers and electronic modulation, in addition to functions: radio cameras, window hyperlinks, infra-red & laser links.A short bankruptcy on satellite tv for pc thought provides an outline of satellite tv for pc verbal exchange and orbits, uncomplicated satellite tv for pc conversation conception, transportables (`flyaways') and vans, in addition to analogue vs electronic matters, electronic compression and MPEG. structures rules and operations also are brought in addition to defense and logistics issues.If you are looking for a fast and straightforward creation to the topic, this booklet will act as an important at the task reference advisor. *Easy to appreciate, important `quick-start' advisor to satellite tv for pc newsgathering.*Provides a easy grounding in analogue, electronic, compression and satellite tv for pc expertise for a complete knowing of the subject.*Shows how the method works from starting to finish together with very important felony and questions of safety.
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Additional resources for Introduction to SNG and ENG Microwave (Media Manuals)
If you stand at the seashore, in theory, on a clear day you can see to a distance of about 5 km to the level of the water at the horizon. If you were looking at say a ship on the horizon, you would be able to see it further – perhaps 15 km depending on the size of the ship – because of its height above the sea. As we said earlier, ENG microwave trucks typically have a ‘pump-up’ mast that extends from 10 to 17 m, and this gives us a significant height advantage. If the receiver to which it is transmitting is perhaps 100 m high, then we can achieve a theoretical unobstructed distance of around 50 km.
Although as we have just noted, generally for a microwave link to work there needs to be a clear line of sight between the transmitter and the receiver. There are some circumstances where this need not be the case, as we shall see later. Because the earth’s surface is curved, the effective distance between two points that can be seen is limited. If you stand at the seashore, in theory, on a clear day you can see to a distance of about 5 km to the level of the water at the horizon. If you were looking at say a ship on the horizon, you would be able to see it further – perhaps 15 km depending on the size of the ship – because of its height above the sea.
There is a need to strip out the redundant and insignificant information in the signal, and this process of data rate reduction, or compression as it is more commonly referred to, is dealt with in more detail later. The important point to grasp is that digital signals are now the norm particularly for SNG transmissions. In ENG microwave, analogue transmission is still the preferred method, but that is slowly changing with the new generation of digital ENG microwave equipment that has come onto the market.