[RTTY] Questions

[Susan King]

Information like this is why folks shouldn't quit this reflector.

Susan K5DU

On Thu, Jun 17, 2010 at 5:50 PM, Kok Chen <chen at mac.com> wrote:

>
> On Jun 17, 2010, at 6/17    9:33 AM, Tom Martin wrote:
>
> > Why is Fldigi so popular?  Tried many times to set it up and I can't
> > get it to work.
>
> IMHO, in answer to your question, I think there are two primary
> reasons.  One is that it is "cross platform" and the second is that it
> supports many modes.  It is also free (but so are many other software
> modems).
>
> I find more and more hams today either moves between operating systems
> or use multiple operating systems.  fldigi supports Windows, Linux and
> Mac OS X.  Except for little things, the feature set between the
> different versions of fldigi are virtually identical.
>
> On the Mac OS X, fldigi is a multiperson effort while cocoaModem is a
> singer person effort.  (By the way, "fl" = fast and light, and
> "cocoa," in their names refer to the operating system frameworks which
> the two programs are written on).  With cocoaModem, I only implement
> the stuff that I myself use.  I don't use Olivia and MT63 because I
> personally consider their bandwidths to be excessive (but really have
> no problem if someone else uses it when the band is not crowded).
> Because of that, ops that need Olivia and MT63 (and I have had
> constant stream of requests, all of whom I point in the direction of
> fldigi, now that it is available on Mac OS X today).  fldigi supports
> those modes and many more. The same would be true if you are a regular
> MMTTY user on Windows who needs Olivia, although you have a wider
> choice there (MultiPSK, etc).
>
> As to your set up comment, I am not sure what to advise, since I have
> only tried fldigi on Mac OS X.  I don't know what the user interface
> details are for Windows or Linux.
>
> But... on Mac OS X, you need to do two things:  the first, which you
> must do, is to select the Modems menu in fldigi's "Configure,"  click
> on the SndCrd tab to choose the Audio device and Audio settings --
> they must point to the sound card that is connected to your radio.
>
> Second, you need to figure out what PTT mechanism to use to key your
> transmitter into transmit mode.  Many rigs, like the K3 has an active
> VOX circuit in digital modes, and you need not do anything special in
> fldigi, just let the AFSK tone pair trigger VOX for you.  While other
> rigs, like the FT-1000MP disables VOX when in digital modes.  If your
> rig does not support VOX, you will need to use the "Rig" tab in the
> "Configure" menu and either set up an RTS/DTR keyed PTT (through a
> serial port) or perform PTT through the rig CAT commands.
>
> Basically, with software (AFSK) modems, you need to (1) get audio from
> the computer to the radio and get audio back from the radio (the sound
> card interface) and (2) provide a way to key the transmitter into
> transmit mode.
>
> Get those two things to work properly, and you should be good to go
> with fldigi (yeah, you need to make sure the RTTY tone pair of fldigi
> has to match the rig's filter, etc, but you need to worry about that
> even with other programs.
>
> 73
> Chen, W7AY
>
>
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