- Trimble User Guide GPS Receiver AgGPS 252

2 Overview
4 AgGPS 252 Receiver User Guide
2.1 Standard Features of the AgGPS 252 Receiver
A standard AgGPS 252 receiver provides the following features:
• 12 GPS (C/A-code) tracking channels, code carrier channels
• Horizontal RTK positioning accuracy 2.5cm (0.98in) + 2ppm,
2 sigma; vertical RTK positioning accuracy 3.7 cm (1.46 in)
+ 2 ppm, 2 sigma
• Submeter differential accuracy (RMS), assuming at least five
satellites and a PDOP of less than four
• Combined GPS/DGPS receiver and antenna
• System level cable
• AgRemote utility with four-button keypad to configure and view
system properties (download from the Trimble website at
www.trimble.com)
• LED status indicator
• The receiver outputs a 1 PPS (pulse per second) strobe signal on
both ports. This signal enables an external instrument to
synchronize its internal time with a time derived from the very
accurate GPS system time.
• WAAS differential correction compatibility
• AgGPS 170 Field Computer compatibility
• EVEREST™ multipath rejection technology
• OmniSTAR VBS and HP positioning compatibility
• Two ports that support both CAN 2.0B and RS-232:
CAN
– J1939 and NMEA 2000 messages
Note – The AgGPS 252 is ISO 11783 compliant. It supports
some ISO 11783 messages.
RS-232
Ag252_100B_UserGuide_ENG.book Page 4 Thursday, July 28, 2005 4:06 PM