Hewlett Packard 8566B Spectrum Analyzer 100Hz-22Ghz. Unit powers on. Completes self-test with no errors, oven indicator turns off after about 3 minutes, fan quiet, CRT display dim (typical) but no image burn-in, good focus and useable, shown with calibration signal displayed. Rotary encoder and buttons O.K. Purchaser will be responsible for any maintenance and calibration. Unit will be separated and ship in 2 boxes.