Special Features:

Portable device designed to track vehicles; utilizes radio frequency spread spectrum technology; miniature, low pwr data logger w/a built-in remote rf link; has separate download box, can be battery packed or hard wired; sentinel and download box have a radio module which uses frequency hopping spread spectrum technology to communicate

Properties:

An item which makes a permanent representation of electronic signal data derived from target parameters, guidance and evaluation signals, and the like, these signals may be above or below 20,000 hertz. They may be in digital and/or analog form, the characteristics of which limits useful playback to a compatable reproducer. These items usually include multichannel signal input facilities for the simultaneous recording of several types of signals. Excludes recorder, sound.