Better yet, two filters separated by 170 HZ (a la DSP) !!
73, Dick, W1KSZ
-----Original Message-----
From: rtty-admin@contesting.com [mailto:rtty-admin@contesting.com]On
Behalf Of John
Sent: Tuesday, August 28, 2001 6:32 PM
To: rtty@contesting.com
Subject: Re: [RTTY] Bandwidth of a RTTY signal (was:SO2R RTTY Radio)
I don't profess to know it all either, but I always thought that a 250 HZ
filter would be more than adequate because the rtty signals were only 170 Hz
shift :-) :-) :-)
John - vk4cej
> Jay, Ekki, and all,
> I suspect you are both correct but I would also like to consult with the
> signal processing experts on the math. Ekki, can you steer me to some
math
> sources on your BW calculations?
>
> I am also using the IC 756PRO as Ekki is and have to make sure my
narrowest
> settings in crowded conditions are a little wider. I settled on 300 Hz as
I
> found 250 Hz too narrow. This was just by experimenting.
>
(some deleted to keep it shorter)
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