document: Multichannel scaler for general statistical analysis of dynamic light scattering A four channel scaler for counting applications has been designed and built using a standard high transfer rate parallel computer interface bus parallel data card . The counter section is based on standard complex programmable logic device integrated circuits . With a 200 MHz Pentium based host PC a sustained counting and data transfer with channel widths as short as 200 ns for a single channel is realized . The use of the multichannel scaler is demonstrated in dynamic light scattering experiments . The recorded traces are analyzed with wavelet and other statistical techniques to obtain transient changes in the properties of the scattered light
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