Abstract: A high speed telemetry system for implantable devices such as a pacemaker includes a transmitter disposed in an implantable housing and an external receiver. Typically the housing is metallic and it attenuates drastically electromagnetic signals having frequencies above a relatively low cut-off frequency. The transmitter includes circuitry for generating cosine waves of different frequencies and for selectively assembling these waves to define a set of data symbols. Preferably one of the frequency is a multiple of the other. Integer halve-periods of the waves are selected to define the symbols such that the overall data transmission rate exceeds the cutoff frequency. The external receiver synchronizes itself to the transmitter, and decodes the symbols using a constellation chart to decode the symbols into binary data.

Abstract: An apparatus for recording analysis of a reagent test strip having a plurality of color blocks for testing different constituents of a fluid, comprises a reference panel having a plurality of visually distinguishable and calibrated color areas or spots, a plurality of first lights for designating the testing of a different constituent or parameter, a plurality of second lights each located adjacent a different color spot, a cavity or space adjacent groups of color spots, detection optical detector for detecting the presence of the reagent strip positioned in the space, and a microcomputer for recording and storing test results and having means for directing sequential testing of the different parameters and for turning the lights on and off during the sequential testing. The apparatus includes switches for signaling the microcomputer to record and store the test data and for turning the apparatus on and off. The invention includes a process for operating the apparatus.