09 May 2001
Scrutinize the sampling rate
The microprocessor receives data from the sensor's PV transducer plus any other onboard sensors, such as an ambient temperature sensor, compares them against stored values, performs calculations, and finally provides outputs in the form of digital commands to various
driver circuits.
| Simplified view, sampling rate effect |
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During some finite time period, the microprocessor is not available to receive new data from the PV transducer. This periodic acceptance of data from the PV transducer is the sampling rate, measured in time or frequency. Twenty ms are equivalent to a frequency of 50 hertz.
The PV transducer is providing unfiltered, moment-in-time data. This means
the microprocessor never sees the PV spikes, which occur between samples S1
and S2 and between S3 and S4.
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