A sphygmogram measure method and device includes an upstream and a downstream pressure sensor arranged in accordance with the bloodstream direction to measure the pulse pressure of two adjacent points on radial artery in the wrist. The receiver includes a receiver input for coupling to the channel and a switched capacitor pre-emphasis filter coupled to the receiver input. In this way, moisture permeating through the seal portion 3 and entering a gap between the pair of transparent glass substrates 1a and 2a can be reduced. The source of electrosurgical energy correspondingly supplies an amount of electrosurgical energy to the electrocautery blade dependant upon the electrical output signal. A color matching function is used to compute three measures of the target’s probable location based on the target color, shape and motion. In one disclosed embodiment, a touch pressure is simulated on a touch-sensitive display by detecting inputs corresponding to each of an untouched display and two or more measures of touch pressure, and displaying images on the display corresponding to the untouched display and each measure of touch pressure.