Getting Acquainted
4
P/N: 1011907-01
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Getting Acquainted
This chapter describes the standard components and accessories included with your receiver.
Communication and Power Port
Both the serial and Ethernet communication connectors of the MR-2 feature a power input.
Power Input
The serial and Ethernet connectors on the MR-2 accept an external 9 to 36 VDC power source. Connect the
MR-2 to a power source to turn on the receiver. When the LED is lit solid, the MR-2 is receiving power. Disconnect
the MR-2 from the power source to begin the shutdown process. The power LED will remain on until the end of
the shutdown process (see “Turning the Receiver On/Off” on page 19 for more information).
Com Features
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Supports serial data using EIA RS-232C-level signals.
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Supports baud rates of 115,200 and higher.
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Supports RS232 RX and TX signals.
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Supports simultaneous output of position and status data along with input of control commands and/or
differential corrections for RTK.
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Supports CAN
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Supports GNSS board firmware upgrades.
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Supports input of differential RTK corrections from an external radio source.
PPS Connector
Modern synchronization and time transfer applications require a highly-reliable timing source. The MR-2 supports
a 1PPS (pulse-per-second) signal, which provides a very accurate reference source for external devices. You can
program the period, offset, edge, and time reference of the 1PPS signal using GRIL commands.
The 1PPS signal has the following attributes:
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Amplitude (on 50 Ohm load): >=2 Volts
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Polarity: Positive
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Normal pulse width: 3.3 ms
Ethernet Connector
Attach the Ethernet cable to the breakout, which splits the signal to the RJ45 Ethernet port and the SAE power
port.
