[1000mp] RTTY/250hz Filter shift?

Sun, 22 Dec 2002 21:34:40 -0800

The MkV knows to shift the passband correctly for RTTY when you select
RTTY mode. FSK/AFSK is not the issue. 

The appropriate passband center is selected for each mode. You can of
course move the passband center with the shift control to wherever you
want it within the limit of the selected filter. 

73,

Steve
W1SRD

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Tom Homewood
Sent: Sunday, December 22, 2002 12:28 PM
To: [email protected]
Subject: Re: [1000mp] RTTY/250hz Filter shift?

On the MP it makes a difference whether you use AFSK (Packet) or FSK
(RTTY).
With FSK I don't have to move the shift at all with 250 hz Inrad
filters.
With AFSK I have noticed that you have to shift for optimum performance.

Tom, W1TO

----- Original Message -----
From: "Blake Meinecke" <[email protected]>
To: <[email protected]>
Sent: Sunday, December 22, 2002 1:40 PM
Subject: [1000mp] RTTY/250hz Filter shift?

> Noticed yesterday during OK RTTY that have to turn SHIFT knob to about
> 1oclock for my MKV to be centered on RTTY sigs when in NAR2 (both
inrad
> 250's).
>
> Sigs are centered FB with no SHIFT adjustment when in NAR1 (stock 500
and
> 400 inrad).
>
> Could have sworn that I didn't have to do this the last time I worked
RTTY,
> but I could be wrong.  What's the story?
>
> Blake N4GI
>
>
>
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