The Universal Time Interval Counter has two versions, a PXI and PCI version. Both versions are identical in performance and specifications.
The GTX2200 is a Universal Time Interval Counter on a 3U PXI Board while the GC2200 is a Universal Time Interval Counter PCI Board.
The PXI/PCI counters measures frequencies from DC to 2GHz (GTX2230/GC2230). Channel A of the GTX2220, GTX2230, GC2220 and GC2230 has a high frequency option that extends its measurement range to 1.3GHz/2.0GHz respectively. The GTX2200/GC2230 provides a maximum of 10 digits per second with 100pS resolution. Each input channel can be programmed for high (1 MOhm) or low (50 Ohm) input impedance.
The GTX2200/GC2230 includes fourteen pre defined measurement functions. The GTX2200/GC2230 has functions to measure Frequency, Period, Pulse Width and Time Interval to name a few. Every GTX2200/GC2230 has an internal clock source and supports an external reference source. A programmable ARM source provides internal arming or external arming with positive or negative slope. The counter also provides a TTL Gate output that signals when the measurement gate is open or closed.
The GTX2200/GC2230 uses reciprocal counting and dual interpolation techniques to achieve high-resolution measurements on lower frequency signals without sacrificing measurement time. Reciprocal counting provides a fixed number of digits of resolution for all frequencies rather than a fixed resolution in Hz for the same gate time. For example, the GTX22X0/GC22X0 provides 10 digits of resolution for frequencies from 1Hz to 100MHz in one second.