[ICOM] Shaft Encoder vs pot?

[Jennifer]

Just wonder, is that the same as a DDS Encoder?


At 10:55 AM 4/29/2008, you wrote:

>Ken,
>
>The major difference between a variable resistor and shaft encoder is as
>follows.
>A variable resistor typically has three terminal.  The total or maximum
>resistance is between two of these terminals. The third terminal
>resistance in respect to the other two is continuously variable.
>An encoder is a digital unit that creates a position code relative to the
>shaft rotation.  Some encoders may just provide pulses relative to the
>rotation and the direction of the rotation. Other encoders may also
>provide an output which may reflect the absolute shaft position.
>In car radios, the detentes can be there as a tactile feedback.  The
>actual function cab be a variable resistor or encoder.
>
>This is just a very brief explanation.  I hope that it helps.
>
>
>Mort,  KB6BSN
>
>ken.holland at evonik.com
> >
> >
> > Hello all,
> > Just a short question here, what is the difference in a *shaft encoder*
> > (as
> > used in the 756 Pro PBT encoder) and a "variable resistor" or pot?  I have
> > wondered that when turning the volume knob on car radios - they seem to
> > have many little "detents" as you turn the knob.  Just what info is being
> > sent to the processor?  Pots I understand, but not *encoders*.
> >
> > Thanks for any info.
> >
> > Ken H>
> > K9FV----
> > Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/
> >
>
>----
>Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>Icom Users Net: Sundays, 1700Z, 14.316 MHz
>Icom FAQ: http://www.qsl.net/icom/

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