> when n becomes big, the ratio tends to 1/square(n) > For example, for MT63 where you have 64 carriers in parallel, > You transmit only 12.5 watts with a 100 watts maximum XCVR.
The same applies to the digi-sstv hamdrm/windrm modes. 30 to 60 carriers, crest factor (average to peak power) is about 10db. On a 100w tx im running 10W to 15W average power. Most hams use PA's with this mode. A 1kw pep amp runs an average power of only 60W for best SNR's. Increasing the average power will make the signal less readable due to peak-clipping. It usually takes some time for beginners with those modes to realize and believe this. The advantage of the mode is speed. 2400 bps with +10db snr, 1200 bps with +6db snr.
