Topcon introduced HiPer Lite+, a completely cable-free RTK GPS+ system that adds dual-constellation tracking to the convenience and simplicity of cable-free RTK operation. GPS+ is Topcon's advanced dual-constellation satellite tracking-GPS plus GLONASS-currently providing almost 50 percent more satellites than GPS alone. Cable-free instruments are ideal for layout, grade checking and other construction applications.
HiPer Lite+ incorporates all features of the standard HiPer Lite including the advanced, internal 915 MHz spread spectrum radio designed specifically for close-proximity GPS+ antenna operation. This eliminates multiple components, connections and external power requirement of traditional GPS base stations while still providing precise measurement up to 1.5 miles away from the base.
Source: Topcon, Feb. 13, 2004