DTTB Rating of a PAL Transmitter
To handle a COFDM signal with a 9 dB peak to average character, a PAL transmitter needs to be derated by :
- 6 dB
- That is, a 10 KW peak sync transmitter is capable of 2.5 KW COFDM power.
- Provided linearity is adequate.
- and other parameters are adequate such as :
- amplitude and group delay response
- LO phase noise
- noise level