What is synchronous output (range sensor)?

Relation

• Is it possible to use only one output of UST-05LN?

• I get an optical window / short-distance error when using the muting function. Is it normal that short-distance error occurs if there is an object near the sensor even in muting mode?
  The cause is probably smoke. Smoke will be a trigger of the short-distance error.

• The optical window has become dirty. Please tell me how to clean it.

• What are the specifications of UAM's Ethernet cable?

• The UST-30LX has multi-echo support and stain resistance, but what about water droplet adhesion?