PCI time interval counters
Staff -- Test & Measurement World, 6/1/2005
These 3U PCI-based universal time interval counters provide 14 predefined measurement functions for measuring frequency, period, pulse width, and time interval. The GC2210 measures frequencies from DC to 225 MHz with 1-ns resolution. The GC2220 measures frequencies from DC to 1.3 GHz with 100-ps resolution. Each input channel can be programmed for high (1-Mohm) or low (50-ohm) input impedance. Covering frequencies up to 2.0 GHz, the GC2230 determines any frequency to within 0.1 ppm in just 1 ms and resolves each time measurement to 100 ps. Every GC22X0 counter has an internal clock source and accommodates an external reference source. Geotest-Marvin Test Systems, www.geotestinc.com.
