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: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Joe Subich, W4TV
Sent: Friday, September 19, 2008 11:55 AM
To: 'zibs'; [email protected]
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.
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