Quartz-enhanced photoacoustic spectroscopy (QEPAS) is a sensitive gas detection technique which requires frequent calibration and has a long response time. Here we report beat frequency (BF) QEPAS ...

It is a stringent requirement for all quality systems to calibrate the equipment used for measurements. The International Vocabulary of Metrology defines the term calibration as an “operation that, ...

An accurate way to calibrate a frequency source is to use a high-resolution counter/timer to measure the beat frequency, or phase difference, between the source to be calibrated and a reference such ...

Automated test equipment (ATE) describes testing apparatuses designed to perform a single or sequence of tests on one device or multiple devices at a time. Different types of ATE test electronics, ...