On 08/12/2015 03:20 PM, Jim Brown wrote:
Besides, the time domain (rise/fall times) is the wrong way to look at keying. The only effective way is in the frequency domain, where the P3 with SVGA can resolve to a few Hz when set for narrow scan widths.
A spectrum analyzer is the best way to tell *if* something is wrong, but a time-domain display of the modulation waveform is the best way to determine *what* is wrong. You can easily see if the key clicks are due to too fast a rise time, too fast a fall time, incorrect key shaping, flat-topping in an external amplifier, insufficient bias in the amplifier, parasitic oscillations, etc. With a spectrum analyzer you can only tell that the clicks are there, not what is causing them.
Alan N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
