Optical rotary encoder of roundss！

What about repeatability and accuracy?
The output reading will repeat itself to within ± ½ LSB, either for position move‐and‐return or power‐up. The accuracy increases as the ECR increases. With properly
correction parameters an error as low as 10 arc seconds or below can be achieved.
What is the MTBF of the Electric Encoder?
The Electric Encoder is made of reinforced polymer and low‐power electronics (typicallyless than 30mW power consumption). It does not include components such as bearings or LEDs. Therefore, it has virtually no failure mechanism.  
How about RFI emissions?
The Electric Encoder conforms to CE directives.  
How about RFI/EMI susceptibility?  
The Electric Encoder is inherently immune to magnetic fields, internally shielded from electrical fields, and is also insensitive to RFI as evidenced by many defense applications.  
How sensitive is the cabling?
Because the differential output signals are of low frequency, they are easy to handle and protect from high‐frequency pick‐up noise. In fact, the Electric Encoder™ has been used in PWM environments with unshielded cables.

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