The 1207A Microwave Signal Source employs UNIDIAL? single-knob tuning and has direct-reading digital frequency indicators which are accurate to ?0.5%. The instrument covers the frequency range of 3.8 to 8.2GHz. A Delta F front panel control offers a minimum of 1.5MHz fine frequency tuning. The unit generates relatively high-level microwave signals which can be internally square-waved or frequency modulated; or externally pulse, square-waved or frequency modulated.