Low-cost counter-timer offers 6-GHz range

Aa 6-GHz bench/portable frequency counter, the TF960 counter-timer features a high-quality temperature-compensated frequency reference that is stable to within ±1 ppm over the full temperature range. An external reference input is provided and changeover from the internal time-base is automatic when an external reference standard is connected. The counter-timer can measure and count from 0.001 Hz to 6,000 MHz, and incorporates a USB control interface, which facilitates control and data transfer. The unit operates from internal rechargeable NiMH batteries that typically give 24 hour operating life. The universal ac-charger supplied recharges the batteries in

The $542.50 unit can measure frequency, period, pulse width, duty cycle, and frequency ratio, as well as event counting/totalizing. For frequency, period, and ratio functions, the TF960 uses a reciprocal counting technique to provide high resolution at all frequencies with up to 10-digit accuracy. For frequencies up to 125 MHz, the device input is configurable as 1-MΩ or 50-Ω impedance, ac or dc coupling, and 1:1 or 5:1 attenuation. The threshold is fully variable, and the active edge can be a positive or negative transition. Two high frequency inputs cover a range of 80 MHz to >3 GHz and 2 GHz to >6 GHz, the latter input being via an N connector.