The title says it all -- Rick asked for it, and I did it this morning, changing the frequency axis to log and moving labels around. I also added data for the new IC7100, a do everything cheapie with
Nicely done, Jim. Since I have an O II, I looked at that one first. I see the O II shows the lowest phase noise out to about 2.5 kHz, where it matched the K3, then heads the wrong way. It's #2 to abo
Great summary Kim, and yes that data on the Orion II is disappointing too. I wonder if there is anything that can be done to resolve it only via firmware changes? I simply don't know. Jim, Thank You
Good question, Kim. Part of the answer is the RX bandwidth. Another part is the receiver's issues. In the meantime, here's more to chew on. It includes replots of ARRL's Keying spectra, and some word
Off list. I've been thinking about this. First, I think it's non-correlated noise, so the wideband noise would add by 10 log BW, where BW is the RX bandwidth that would need a correction factor for f
Well, I meant to send it off list, but it was late. :) I've been thinking about this. Overnight, I thought some more. The keying waveform is, fundamentally, modulation of a continuous carrier by a wa
I've been thinking, too. A square wave has an infinite number I'd odd harmonics, not all harmonics. Regardless, it's an excellent way to look at IMD, far better than two tones. What if we modulated t
Yup. What if we modulated the TX with pink noise? That really does have everything in it. Make the pink noise much wider than the expected audio bandwidth. Ideally, the spectrum should be limited to
I use pink noise for all my tests that involve a signal like speech. I agree Jim that it is the proper signal character for the mode. 73 Bob, K4TAX Sent from my iPhone _______________________________