User`s guide

Chapter 3 - Receiver Descriptions
Active Antenna Configuration
The recommended external gain (antenna gain minus cable and connector losses) for the M12+
is 18 to 36 dB. A typical antenna system might have an active antenna such as the Motorola
Hawk with 29 dB of gain and five meters of cable with 5 dB of loss. The net external gain would
then be 24 dB, which is well within the acceptable range. While the receiver may track satellites
with gain values outside of the recommended limits, performance may suffer and the receiver
may be more susceptible to noise and jamming from other RF sources. For more information on
antennas, refer to Chapter 4.
M12+ Receiver Electrical Connections
The M12+ receivers receive electrical power and receive/transmit I/O signals through a 10-pin
power/data connector mounted on the receiver. Figure 3.3 below illustrates the positions of both
the 10-pin header and the MMCX antenna connector.
Figure 3.3: M12+ Oncore Receiver
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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