GPS Receiver
A1037-A
3 Quick Start
In order to allow an easy and quick start with the modules A1037-A, this chapter
provides a short overview on the most important steps to receive NMEA messages
with position information on a serial port.
3.1 Minimum Configuration
The following picture shows a recommended minimum configuration for NMEA out-
put and commands sent and received via an RS232 interface based on the GPS
module A1037-A.
Figure 4: Recommended minimum configuration A1037-A
Remarks:
•
Place C2 to C6 close to SP3222. For capacity values see datasheet of actual
component used.
•
Use 3.3V level shifter (SP3222 or equivalent).
•
Use separate ground plane for antenna ground.
•
Antenna input impedance is 50Ohm. Match as close as possible.
•
Maximum allowed antenna current is 50mA. Consider a current limiter.
•
A battery back-up circuit for the RTC (Real Time Clock) should be consid-
ered (see 10.6 Battery Back-up)!
NOTE: Please make sure that the A1037-A is either within an enclosure or addi-
tionally shielded to reduce the influence of temperature fluctuations often generated
by airflow.
V2.0 - 03/07
User’s Manual
Page 11 of 29
