A method of converting very high bandwidth, single-transient information in a rocket-borne experiment to a much lower bandwidth is described. Application of the scan conversion technique to single-transient information of nanosecond rise time permits conversion to bandwidths commensurate with present day telemetry systems. Signal-storage rise time capability is 1 to 10 ns depending on the type of storage tube used. Of special interest is the unique transistorized linear sweep. Its delay between trigger and start of the sweep is less than 6 ns and the sweep voltage is plus and minus 400 volts. Other transistorized circuitry, such as readout sweep, time base generator, and signal amplifier, is also discussed.