CW, pulsed, and other time-varying microwave and millimeter-wave signals can be automatically measured by the 585C and 588C frequency counters. VCO measurements, chirped radar profiling, and frequency-agile system analysis are all made with unparalleled ease. Pulsed signals can be fully characterized, including carrier frequency, frequency linearity, pulse width, and pulse period. The 585C measures signals up to 20 GHz and the 588C's range reaches 26.5 GHz with an option to extend to 170 GHz.

All Phase Matrix EIP® brand frequency counters are based on a unique heterodyne architecture that incorporates a YIG-based preselector. The YIG-preselected input provides unparalleled performance, in amplitude discrimination, frequency selectivity, kickback noise, and burnout protection.