Spectral Dynamics SD1012B Dual Tracking Filer Designed For NASA Space Station Program ground engineering station. A solid state precision analyzer with a specific purpose. Obtained from NASA Langley in 1997 with tag and paperwork to prove this. Measures 5” high 19 wide and 19” deep. Rack mount about 25 lbs. Operates on 120 Volts 60 Hz and powers up. No way of testing functionality. Contains many specialized Analog ICs and precision sub-assemblies.