The requirement that, "...the radio should be configured so that an upper SSB signal can be copied in case they need to tell you the channel is occupied. " precludes the use of FSK. To comply with t
There is nothing in the requirement that one actually *copy* USB. One must avoid interference but that cuts both ways ... USB users (other than the authorized agencies) are not permitted to interfere
I would like you to substantiate that statement, Joe. I haven't transmitted using FSK for years now. There is so many more technological advantages to using AFSK. 73 Chen, W7AY ______________________
Ohhhhh, this should be interesting. What technological advantages are there to AFSK ?? It is SOOoooo much easier to do FSK IMHO. Radios such as the K3 do make it easy with either FSK or AFSK. But wha
Especially true since for at least 20 years no radio that I know of does actual FSK in any case. Its just AFSK converted. Last true FSK that I used was back in 1986 with Hal WA7EGA and that resulted
The K3 does true FSK ... it's done using DSP to create the signal directly at the IF. 73, ... Joe, W4TV _______________________________________________ RTTY mailing list RTTY@contesting.com http://l
While you may have the technical "chops" to do proper frequency shaping and filtering to generate an AFSK signal that is better than most "FSK" transmitters, the vast majority of users - even many wh
Uhh, doesn't the K3 use a 15khz IF? If you use the FSK keying input on it you're just generating 2 audio tones in DSP....AFSK controlled by the firmware. A lot of the modern rigs do the same thing re
Yes ... No, it is generating and shifting one tone ... taking two alternating external audio signals and mixing them with a 15 KHz carrier in a balanced modulator (even a numerical balanced modulator
I have already given one. The next biggest problem with FSK transmission is baud rate. And it is something most FSK ops are clueless about. In the old days, like on my ST-8000, real UARTS were used.
Yes, mathematically, some of the newer rigs (not just the K3) generate an RTTY signal at a lower tone pair (just like AFSK RTTY on SSB rigs) before shifting it up to RF frequencies. Except that the m
Oops, I mean " instead of passing scalar analog signals through SSB filters to suppress the RTTY images." 73 Chen, W7AY _______________________________________________ RTTY mailing list RTTY@contesti
Joe, What are you talking about? That statement cannot be factual. Just because it's easier to generate a lousy signal with AFSK does not logically requite that an AFSK signal is of lower quality. I
No, what I mean is AFSK with individuals who don't know what they're doing is just plain crap and there are far too many individuals who either don't know what they're doing or don't care what they'
Joe, Got it. While I don't have as great of a mind as you do, we are thinking the same. FSK is the best mode for technological novices. Part of it's attraction is that it's use is simple and without
FSK is the best mode for technological novices. Not necessarily. FSK often requires an FSK keyer and PTT control. AFSK requires only one extra audio cable. Not too demanding. You're already routing a
Hank, I think you are right about SSB. Novices should be using CW only. Hea, we did it that way once on a time... ha ha. See you in the next one! 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie
And crystal control, too. Ahh, the lost art of crystal etching and the screw which you installed in the holder to compress the crystal and therefore vary the frequency. Remember hydrofluoric acid? An