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SPSx51 Modular GPS Receivers User Guide 17
Features and Functions 2
• Can be upgraded to receive GLONASS signals.
Note – When the receiver is upgraded to GLONASS, the GA510 rover GPS antenna should
be replaced with the Zephyr
™
Model 2 antenna.
• 1 Pulse-per-second (1PPS) output
SPS551 Receiver optional features
• Internal 450 MHz (3 frequency bands) radio with transmit and receive capability
• Internal 900 MHz radio with transmit and receive capability
SPS551H features
The SPS551H receiver is an add-on receiver, which provides Precise GPS heading
capability when combined with another SPSx51 Modular GPS receiver (excluding the
SPS751 Basic base and or another SPS551H receiver). The SPS551H cannot be used
alone.
The SPS551H receiver provides the following features:
• Low-cost Precise GPS Heading add-on GPS receiver for the Trimble SPS551,
SPS751, or SPS851 receivers
• Connection to another GPS receiver through Bluetooth wireless technology or a
serial port
• 10 Hz heading update rate in NMEA 0183 and Trimble binary formats
• Configuration and heading on a two-line display
• Includes a GA510 rover or Zephyr Model 2 rover GPS antenna, mounting
bracket, and short interconnecting cable
• RoHS compliant
• Tracks up to 24 GPS satellites
• Can be upgraded to receive GLONASS signals
• 1 Pulse-per-second (1PPS) output
The receiver is ideal for projects that require the precise heading of a vessel or
structure.
SPS651 features
The receiver provides the following features:
• Integrated GPS receiver and radio
• Precise Vertical measurement when in Location RTK mode – Location RTK
precision of 10 cm horizontal and 2 cm vertical