Re: LF: Re: Question: Rotating Shift Encoder

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Re: LF: Re: Question: Rotating Shift Encoder

from [M. Bruno]

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To:	[email protected]
Subject:	Re: LF: Re: Question: Rotating Shift Encoder
From:	"M. Bruno" <[email protected]>
Date:	Sun, 14 Nov 1999 14:28:57 +0100
In-reply-to:	<001401bf2e86$0d8e7b00$0600a8c0@main>
References:	<[email protected]>
Reply-to:	[email protected]
Sender:	<[email protected]>

At 09.52 14/11/99 -0000, you wrote:

Geri,

I am currently looking into a way how to realize a simple way of doing FSK
with my DDS VFO.

How about "VXO-ing" the clock oscillator?

Dave G3YXM.


I was thinking the same way. You need 5 Hz out of 137 kHz, that is
about 36 ppm (parts per million).

It is quite easy to shift an overtone crystal by this amount - use
a varicap, or a fixed cap switched by a transistor, or even a small
relay - orrendous, but the baud rate is so slow!

And you need not to play with the encoder.


73 - Marco IK1ODO

[email protected]

Rivalta, ITALY JN35SA (N 45 01' 25.6", E 7 31' 09.4")

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