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U.S. Air Force Senior Airman Mathew Harrington, a Precision Measurement Equipment Laboratory journeyman assigned to the 57th…
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U.S. Air Force Senior Airman Mathew Harrington, a Precision Measurement Equipment Laboratory journeyman assigned to the 57th Maintenance Squadron, Nellis Air Force Base, Nev., conducts maintenance on a 53 plug-in unit, which is used to calibrate an oscilloscope April 5, 2011.

An oscilloscope is an electronic instrument used for measuring electronic sound waves. (U.S. Air Force photo by Senior Airman Michael Charles). Original public domain image from Flickr

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U.S. Air Force Senior Airman Mathew Harrington, a Precision Measurement Equipment Laboratory journeyman assigned to the 57th Maintenance Squadron, Nellis Air Force Base, Nev., conducts maintenance on a 53 plug-in unit, which is used to calibrate an oscilloscope April 5, 2011.

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