Linx Technologies MDEV-GPS - Manual (Page 6)

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The USB Section
The development board features a Linx QS Series USB module for
interface to a PC. This allows the board to be used with the supplied
development software or with custom software developed by the user.
Drivers for the USB module are included on the software CD in the kit
or may be downloaded from www.linxtechnologies.com. Additional
information on using the QS Series USB module can also be found on the
website.
The USB connection also allows the board to be powered by the USB
bus instead of batteries. This can be convenient during development to
eliminate the need for frequent battery replacement.
Figure 6: The Development Board USB Section
The Receiver Section
The receiver module is mounted on an evaluation board which plugs into
headers on the main development board. The evaluation board has an
SMA antenna connector to allow the attachment of many different styles of
GPS antennas, including the included SH Series active GPS antenna. Each
receiver module has its own evaluation board, but all of them are designed
to fit into the same socket on the main board.
On the bottom of the main board is a CR2032 coin cell battery that
provides power to the Real Time Clock (RTC) and SRAM when the receiver
is powered down. This allows the receiver to start up and obtain a position
fix faster. This cell provides about two years of operation.
Figure 5: The Development Board Receiver Section