[Elecraft] K3 PSK31 with Digipan

[Don Wilhelm]

Dave,

OTOH, best results with AFSK is to use a narrow receive filter.  It 
keeps strong undesired signals out of the passband.
Strong undesired signals in the passband cause a reduction of receiver 
gain because the AGC reacts to them.
Sure, the computer can handle and display them, but if the receiver gain 
is reduced because of a strong signal that just came on, your chances of 
maintaining solid print is reduced.

Do as you choose, but I prefer to tune my data mode signals just like 
any other - with the VFO knob, and use a narrow filter to get rid of the 
'other trash' on the band.

73,
Don W3FPR


Dave Quick - KØEKL wrote:
> I'd like to be able to transmit in Data-A mode through my 6 Khz AM filter.
> Being able to see ~6 Khz of spectrum in the waterfall window would be great.
>
> -Dave Quick KØEKL
>
>
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Joe Subich, W4TV
> Sent: Friday, September 19, 2008 11:55 AM
> To: 'zibs'; elecraft at mailman.qth.net
> Subject: RE: [Elecraft] K3 PSK31 with Digipan
>
>
>   
>> But in Data A mode, one can expand the receive width out to
>> 4 kHz using the 2.7 kHz filter. If you attempt to transmit below 200 
>> or above 2800 Hz, power output will drop to zero.
>>     
>
> Perhaps all of the data modes should be limited to 2.8 KHz of DSP bandwidth
> (or even 2 KHz).  That's more than enough for any reasonable amateur data
> mode and will keep users from shooting themselves in the foot. 
>
>
>
>   
>