On Fri, 02 Oct 2009 11:34:45 -0500, you wrote:

>  I would think a 1 K Ohm
>resistor from +5 V to the A and B would make a big difference.  You can 
>get +5 V from the game port or a
>hard drive plug.  Yup, also looking closer, I see COORDINATED spikes in 
>both A and B on a number of
>cycles.  That reinforces my suspicion of the above.

Hi Jon

Encoder is connected to a couple of UA9637ACP differential line
receivers. I'm putting A+ A-, B+ B-, I+ I- in and getting A, B, I out at
3.5V, should I connect the resistors on the outputs of the line
receiver?

Steve Blackmore
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