The YO-901 is a high-performance monitoring instrument, designed for use with the FT-901DM series of amateur equipment. Built around a high-performance oscilloscope, useful for countless station measurements, the Y0-901 includes a two-tone generator, provision for both RX and TX monitoring, and automatic remote switching of monitoring modes. An exciting option for the Y0-901 is a band scope, which allows instant determination of band conditions and activity. Interface to the FT-901DM is quick and easy, with no modification required for both narrow and wide band IF monitoring. Connection cables for typical installations are included with your Y0901. The owner is urged to read this manual in its entirety, so as to become better acquainted with the exciting new Y0901 Multiscope.