Lassen SQ, Reference Manual

Page: 27 / 196

Lassen SQ GPS Receiver 1 3
Starter Kit 1
1.7
Power
The Lassen SQ GPS receiver receiver is designed for embedded
applications and requires a reg3.3 VDC input (+3.0 to +3.6
VDC). The receiver provided in the Starter Kit is installed on a
motherboard, providing a DC power regulator which converts a 9 to
32 VDC input to the regulated 3.3 VDC required by the receiver.
Power can be applied to the interface unit using one of three options:
the DC power cable (Figure 1.3), the AC/DC power converter
(Figure 1.4), or the cigarette lighter adapter.
Figure 1.3 DC Power Cable
The DC power cable is ideal for bench-top or automotive testing
environments. The power cable is terminated at one end with a 3-pin
plastic connector which mates with the power connector on the metal
enclosure. The un-terminated end of the cable provides easy
connection to a DC power supply. Connect the red power lead to a
source of DC po9 to +32 VDC, and connect the black power
lead to ground. This connection supplies power to both the receiver
and the antenna. The combined power consumption of the interface
unit with the receiver and the antenna is 133 - 145 milli-amps.
Note – To ensure compliance with CE conducted emissions
requirements when using the DC power cable, the Starter Kit interface
unit must be bonded to a ground plane.
Note – The yellow wire of the DC power cable is not used. Battery
back-up power is provided by a factory installed 3.6V lithium battery
on the motherboard.