What is BS EN 62553 - Methods of measurement for digital network about?
BS EN 62553 discusses methods of measurement for digital networks. Digital networks refer to the social network built through the use of digital technologies. BS EN 62553 has the purposes of:
- Establishing measuring methods that enable the objective evaluation of the performance of transmission networks so as to make stable DTTB services a reality
- Establishing a technical baseline, such as a definition of technical terms, to standardize measuring methods
The measurement methods described in BS EN 62553 are intended for digital terrestrial television transmission network test and validation. The measurement methods for the digital terrestrial transmitter are not included in BS EN 62553. These methods are described in IEC 62273-1. The purpose of BS EN 62553 is to provide a common technical baseline that makes measurement results comparable in all cases.
Note: BS EN 62553 does not give any regulations and/or mandatory requirements. The specifications and requirements defined for each system have priority over this standard. However, there may be some cases where details are not specified in each individual specification or different systems should be evaluated under a common measurement method.
Who is BS EN 62553 - Methods of measurement for digital network for?
BS EN 62553 on methods of measurement for digital networks is useful for:
- Telecommunication component manufacturers
- Telecommunication equipment manufacturers
- Design engineers
- Quality control personnel
Why should you use BS EN 62553 - Methods of measurement for digital network?
When a transmission network for digital terrestrial television broadcasting (DTTB) is being deployed, new networking technologies such as the Single Frequency Network (SFN) can be employed excelling the conventional analogue TV systems. However, new technical evaluation parameters are introduced for installing SFN systems. In addition, new quality evaluation methods are also established in order to achieve stable and high-quality broadcasting services avoiding the cliff effect, which is one of the typical phenomena in digital transmission that the signal quality is abruptly degraded when the received C/N becomes just lower than a specific value representing the system limit. The digital terrestrial broadcasting transmission networks defined in BS EN 62553 consist of two or more Digital Tv transmitters, relay lines (SDH or PDH contribution link: e.g., satellite, ATM radio, ATM optical fibre, IP Ethernet VLAN), broadcast-wave relay stations (called Gap-Filler or Transposer) through which the same broadcasting program is transmitted. BS EN 62553 shows an example of the transmission network.
The network is classified in BS EN 62553 according to the are assigned frequencies of each transmitter station which compose the network and the signal transmission method between transmitter stations. Two measurement systems are considered according to the compared signal. One is the direct comparison of signals of #1 and #2; this measurement system is defined as a direct measurement system in BS EN 62553. On the other hand, the signal timing of points #1 and #2 are measured by making use of a common reference signal, this measurement system is defined as an indirect measurement system in BS EN 62553. Using BS EN 62553 you can understand the digital terrestrial television transmission network test and validation.
