720A Kelvin-Varley Divider

The 910 and 910R GPS frequency references are fully traceable and extremely accurate gps frequency standards and are suited for use in many applications.

The cesium controlled frequency standard that uses GPS technology and connectivity to provide primary standard traceability from any location

The 910 and 910R GPS frequency references are fully traceable and extremely accurate gps frequency standards and are ideally suited for use in many applications, including telecommunications, calibration and automatic test systems.

Both the 910 and 910R deliver a precision frequency and pulse-per-second time reference which, with its many connectivity options, can be installed, monitored and managed from virtually any location. Both models receive their long-term frequency stability from the built-in cesium standards in the GPS-satellite array, yet can also provide a very high short-term stability from the built-in oven controlled crystal oscillator (OCXO) or rubidium oscillator (Rb).

A primary standard for ratio measurements

Model 720A Kelvin-Varley Divider is a high-resolution primary ratio standard with absolute linearity of 0.1 ppm, temperature coefficient of linearity of 0.1 ppm/ºC, and self-calibration capability.

  • 0.1 ppm resolution, seven decades
  • 0.1 ppm of input absolute linearity
  • Built-in self calibration bridge
  • Front panel self-calibration



General Specifications

Ratio Range
Input Range
 0V to 1100V
 0.1 ppm of input with seven decades
Terminal Linearity
 ±0.1 ppm
Calibration Documentation Reports of Calibration are optional
 14 cm H x 48.2 cm W x 33 cm D, rack mounted (5.5 in H x 19 in W x 13 in D)
 8.16 kg (18 lbs.)


Model Name


720A Kelvin-Varley Voltage Divider


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