Applied Instruments has introduced a noise power ratio (NPR) tester. The NPRT 2200 measures the NPR of a device across a range of power levels. This test quantifies intermodulation distortion and determines the dynamic range of optical transmitters, amplifiers and other active HFC network devices.

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The included PC software uses predefined test setups to run a “power sweep” series of NPR measurements and to graph the results. The measurements are compared to a threshold value to determine the acceptable operating power or dynamic range of the device. Results may be stored on the PC for further analysis.

The NPRT 2200 comes in a compact two-rack unit enclosure that is suited for laboratory and factory ATE environments.