Reading output from a rotary encoder that has a VGA plug

I am trying to control a closed-loop NEMA17 stepper motor with an encoder attached to it, as purchased from StepperOnline. All is well and standard with the motor, but the encoder has a VGA output plug that I am not sure what to do with. Anyways, the following is a screenshot of the only datasheet I'm given:

As the title suggests, I would like gain some insights on the definitions of EA and EB signals in the case of an encoder and how to connect them to Arduino. Let me know if any more information is needed. Thank you!

EA+, EA- indicates a differential driver output.  Will the encoder be any great distance from the controller?  How much electrical noise will be present?

Read about encoder selection.

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