4.3 Analog-to-Digital Conversion

A key component of any digital data acquisition system is the analog-to-digital (A/D) converter. The A/D converter translates the analog electrical signal into a binary form that is suitable for subsequent processing by digital equipment. In most digital data acquisition systems a single A/D converter is used for several data channels through the use of a multiplexer. The rate at which the multiplexer channel switches are opened and closed determines the sampling rates for the channels - all channels need not be sampled at the same the frequency.

4. METEOROLOGICAL DATA RECORDING
 4.1 Signal Conditioning 
 4.2 Recording Mechanisms 
 4.3 Analog-to-Digital Conversion 
 4.4 Data Communication 
 4.5 Sampling Rates 
 4.6 Recommendations