/challenges-projects/project14/diy-test-instrumentation/b/blog/posts/project14-diy-test-instrumentation-build-your-own-test-instrumentation-automated-cable-tester-ivU.S. Air Force Senior Master Sgt. Mike Chandler, 142nd MaintenanceSquadron out of the Portland Air National Guard, displays his avionicsElectronics Systems Test Station (ESTS) cable tester that he designedPhoto by: Airman First Class Andrew Kobialka en-USTelligent Community 12