The Design of a Multichannel Time Interval Measurement Interface Box
Technical Report,01 Dec 2018,28 Feb 2019
CCDC Army Research Laboratory Aberdeen Proving Ground United States
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Precise time interval measurement is required for a number of applications including clock stability analysis, time-of-flight measurements, and particle physics. Commercial time interval measurement devices can achieve picosecond resolution but are expensive, especially for multichannel applications. In previous research, the US Army Combat Capabilities Development Command Army Research Laboratory demonstrated 10-ns resolution on 10 channels using a low-cost field-programmable gate array FPGA suitable for pulse-per-second monitoring. This technical note details the design of an interface box for this FPGA device, enabling practical time interval measurement with a variety of input signals. The purpose of this note is twofold 1 to document the interface box to allow for easy use and future modifications and 2 to provide a reference to facilitate the construction of other interface units, including design advice and lessons learned.