A code generator generates, upon command, code sequences representing either time of day, time and date, or event number codes, in either single sequences or continuously repeating code sequences for simultaneous recordation with a physiological event on magnetic tape or oscillographic paper for permanently identifying and indexing biomedical data. Multiplexed binary coded decimal output lines of a digital clock are strobed to provide the option of either single frame or continuous frame operation while requiring no critical timing circuits, and the sequencing operations are synchronized by the multiplex timer, which recordation is visually interpretable.
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