[TenTec] Optical Encoder operation

["Mark Erbaugh" <mark@microenh.com>]

I believe I understand the basic operation of an optical encoder, such as the 
302. As you turn the knob, a series of holes on a plate connected to the shaft 
generate a series of pulses which the Pegasus software counts and convert into 
a value indicating movement.  My question is how does the Pegasus determine 
which way (CW or CCW) the knob is being turned?

Mark


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