K-3 Calibration
Mike Poole, a technician at Dover AFB Precision Measurement Equipment Laboratory, uses an oscilloscope to verify signal waveforms during a test set calibration. The retired Air Force master sergeant, who hails from Erie, Penn., has worked in PMEL for the past 17 years. (Photo by Tech. Sgt. Kevin Wallace)
PHOTO BY:
Tech. Sgt. Kevin Wallace
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