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GPS module delivers even in weak-signal areas

Posted: 26 Dec 2006     Print Version  Bookmark and Share

Keywords:GPS  processors  ARM  NavSync  satellite 

NavSync Ltd, a GPS components vendor, has unveiled a pair of GPS modules designed for acquiring and tracking satellites in weak-signal areas such as under dense foliage, in urban canyons and even inside buildings. Both run embedded ARM processors.

NavSync's CW45A priced at Rs.6,736.96 ($148) and CW46 priced at Rs.8,011.52 ($176) GPS modules, include the company's previously introduced CW25 GPS receiver, a DC/DC converter, and RS-232, RS-422 and USB interface options. Both also include active GPS antennas. All this is housed in a small weatherproof IP-56-rated enclosure.

The CW45A is billed as a GPS navigational module. The CW46 is considered a GPS timing module. Both modules have the capability to acquire satellites at signal levels down to a rather remarkable -155dBm with network assisted ephemeris data. Both can track satellites down to -155dBm.

For its part, the CW46 modules uses the NavSync CW25-TIM GPS receiver internally, letting the CW46 act as a timing module capable of outputting a GPS-disciplined frequency up to 10MHz. It can achieve full PRC MTIE performance in good signal areas.

Both modules can also provide synchronisation in very weak signal areas including inside buildings. Many environments require high placement of a GPS antenna to ensure a clear view of satellites. In contrast, these modules eliminate that need, and cost.

- Alex Mendelsohn

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