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RC4000 ACU Boardset
Chapter 2
Hardware
2.1.2.4.16 J15 - GPS
Designation
PCB
Pin Count
Connector
Type #
J15
"GPS"
6
Molex Friction Lock Header
2
The J15 connector supports either 1) an internally mounted GPS receiver requiring a separate external
antenna or 2) an external integrated GPS receiver/antenna.
NOTE: the GPS receiver configuration is transparent to software.
Internal GPS
The internal GPS receiver (Garmin GPS 15xH) will be mounted to the options board and J15 will supply
power, ground and serial data. An external GPS antenna will then be attached to the GPS receiver.
The connection to an active GPS antenna is provided through an MCX RF connector, the antenna should
have a male connector installed on the end of its cable. Typically the cable used for the antenna is an
RG-174 coaxial cable. The antenna must provide between 10dB to 30dB net gain between the antenna
feed point and the connection to the GPS.
An example antenna is the Synergy Systems, LLC part number AR-05 active GPS antenna. This
antenna has a center frequency of 1575.42 MHz and has a gain of 28dB.
44
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