The next level of efficiency for broadcasting amplifiers
■Energy efficiency is becoming increasingly important in today’s world. Current broadcasting transmitters typically require four to five times the energy they transmit on-air. There are several technologies available for improving the efficiency of broadcast transmitters. In the following, some of the technologies and their advantages and disadvantages will be discussed.
●General
■The difference between the energy required by the transmitter and the energy transmitted on-air is defined by the signal characteristics of a COFDM or 8VSB broadcasting signal. These signals have a high average power level, but they also contain signal peaks that have to be amplified.
■Maximum amplifier efficiency is achieved when the amplifier is working at its saturation point. For COFDM or 8VSB signals, the amplifier cannot work at its saturation point because it is only possible to reach the saturation point when the amplifier is operating at peak power.
■When the amplifier is operated at a lower power level, it is less efficient. This relationship between average and peak power is represented by the crest factor or peak-to-average power ratio (PAPR). A lower value yields greater potential efficiency.
|
|
|
|
|
|
|
User's Guide |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
|
October 2013 |
|
|
Version 01.02 |
|
|
PD 3606.7001.32 |
|
|
3.1 MB |
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
