The 180TR Rack Mount Normal Persistence Display Mainframe employs the versatility and ease-of-use that are still required in today's applications. Designed to use a wide range of plug-ins (sold separately), the 180TR is the ideal mainframe for use as an Oscilloscope or Spectrum Analyzer System Mainframe. Features include P39 phosphor, front-panel calibrator outputs, and Ext. input. Call for pricing and information on our wide selection of plug-ins.