[Icom] re: [RTTY] keyed AFSK? - was: Best RTTY rig?

Wed, 20 Mar 2002 18:43:26 +0100

Dear OM,

That is exactly what I always found in my Yeasu rigs. It is always like you
discribe it.

The manual of my FT-1000MP Mark V says:

"..., while the FSK mode uses a closure to ground (in the TNC or terminal
unit) to cause the transceiver to generate the "mark" and "space" tones."

The transceiver generates the tones!

The same with the FT990/FT1000D/FT-1000MP.

73!
Hans Remeeus.

e-mail: [email protected]
site: www.remeeus.nl
Ham Radio call: PA1HR

----- Original Message -----
From: "John L Merrill" <[email protected]>
To: "Icom" <[email protected]>
Sent: Wednesday, March 20, 2002 5:50 AM
Subject: [Icom] re: [RTTY] keyed AFSK? - was: Best RTTY rig?

>
>
> When you supply a rtty keying signal to the Yaesu, you are essentially
> toggling between ground and open, which in a Yaesu toggles two audio
tones.
> This is similar to supplying  afsk tones to the mic connector from an
> external source, such as a KAM or sound card using MMTTY, but the Yaesu
does
> this internally. In an ICOM and some Kenwoods the  keying input actually
> shifts the carrier. I'm not sure that's very clear but I hope you get the
> idea. If you look at the FT1000MP/990/MarkV/1000D specifications it will
say
> afsk for transmit. I may be wrong, but I dont think any recent Yaesu rig
> ever used "FSK".
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Ekki Plicht
> Sent: Tuesday, March 19, 2002 9:05 PM
> To: _Rtty
> Subject: RE: [RTTY] keyed AFSK? - was: Best RTTY rig?
>
>
> > For those fsk purists, Yaesu uses keyed afsk not fsk.
>
> What is keyed AFSK in contrast to AFSK and FSK? Never heard the term.
>
> 73,
> Ekki, DF4OR
>
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