Units are available in 14 different ranges with frequency ranges from 0.1 to 40 MHz to 1 to 6,400 MHz with optional resolution ( µHz to kHz). Switching time runs from 1 to 20 µsec.
Programmed Test Sources Inc., 9 Beaver Brook Rd., Littleton, MA 01460, (978) 486-3400, programmedtest.com