[Elecraft] K3 - AFSK A

[Joe Subich, W4TV]

> I am not seeing the Mark frequency displayed on the VFO, but one 
> which seems to represent the suppressed carrier. The displayed 
> frequency is offset from the Mark frequency by about 1.3 kHz. 
> This would correspond with the middle of the K3 filter passband.

What do you have set for "pitch" in AFSK A?  If your mark is 2125 
but the AFSK A "Pitch" is 915, you would see an approximately 1300 
Hz offset. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Stewart Baker
> Sent: Monday, February 09, 2009 10:02 AM
> To: Elecraft Reflector
> Subject: [Elecraft] K3 - AFSK A
> 
> 
> I have been busy setting up MMVARI together with N1MM to use in 
> RTTY contests. I have not encountered any real problems, however I 
> am a little confused when it comes to using the K3 in the AFSK A 
> mode.
> 
> I am using this mode because it always has the RTTY LSB selected 
> as default. The audio tones are fed into the K3 via the LINE IN.
> 
> In the Data Mode section of the K3 Owners Manual it says:-
> AFSK A also uses Audio-shift transmit, but is optimized for RTTY.
> 
> The VFO displays the RTTY Mark frequency, and LSB is "normal".
> 
> I am not seeing the Mark frequency displayed on the VFO, but one 
> which seems to represent the suppressed carrier. The displayed 
> frequency is offset from the Mark frequency by about 1.3 kHz. 
> This would correspond with the middle of the K3 filter passband.
> 
> It would be nice to display the real (yes I know it's audio) Mark 
> frequency as this seems to be a standard.
> 
> a) Am I missing something in my K3 setup ?
> or
> b) The manual is wrong ?
> or
> c) Something else ?
> 
> 73
> Stewart G3RXQ 
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