There has been some discussion on the reflector of late bout Tx mic equalization.
If you have a P3, you can set the span to +/- 50 kHz or less and easily see the results of such Tx equalization on other stations. You'll often see two disinct patterns of SSB signals: 1) Those that look "sloped" in the spectrum. On 20 meters, for example, many signals look like they peak 10 or more dB on the low low side near the carrier. These are typically transmitters with no low cut in the Tx equalization. 2) Those that appear nearly flat-topped in spectrum (not to be confused with over-driving a transmitter amplifier stage). These operators have equalized their systems to reduce the low frequency dominance of their audio. The more equally filled spectrum makes pretty good use of the peak power capabilities of the transmitter. --- If you tune into these signals and listen to them, you will usually find that the "flat spectrum" speech has more dominance but still has good fidelity. You can learn a lot with the P3 :-) 73, Lyle KK7P ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
