[RTTY] Filtered AFSK transmission

[W4GKM]

Chen,

What's the advantage of using fldigi?  Is it just for AFSK, which I haven't 
used in 20 years.

Nick
w4gkm

-----Original Message----- 
From: Kok Chen
Sent: Friday, February 01, 2013 4:42 PM
To: RTTY Reflector
Subject: [RTTY] Filtered AFSK transmission

Some of you might remember that I had in an earlier posting a week or two 
ago, mentioned that fldigi had no RTTY transmit filtering or waveshaping.

Right on the heels of Elecraft releasing their alpha firmware which includes 
FSK filtering for the K3, the latest version of fldigi now implements AFSK 
waveshaping, so I can now take back the earlier statement :-).

If you have been listening to W1AW's RTTY bulletins since yesterday 
(Thursday), they are now using this version of fldigi.  What this means is 
that when W1AW fires up in the middle of a pileup or contest, they are now 
much less likely to bother you.  (Assuming W1AW fixes some remaining 
baseband (hum) problems,  their harmonics were fixed the day after it was 
reported to this reflector.)

73
Chen, W7AY

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