The Amperite HEAD-ALERT modulator has been designed to enhance awareness of motorcycle headlamp illumination I accordance with Federal Standard 49, CFR Part 571.106. An external disable switch is used to disable the modulation function during nighttime driving. The HEAD-ALERT is a two terminal device that is connected in series with the power feed to the lamp (see the installation diagram at right). This safety device has been designed for motorcycle use, to provide additional awareness to other vehicles on the road during daylight hours. The rate of modulation is 200 to 280 cycles per minute, with maximum power being applied to the headlamp for 50 to 70% of each cycle. During the low intensity portion of the cycle, power to the headlamp is held to not less than 17% of maximum intensity.
