3 Quick Start
In order to allow an easy and quick start with the A1035-H module, this chapter
provides a short overview on the important steps to be taken to receive NMEA
messages with position information on a serial port.
3.1 Minimum Configuration
The following pictures show two versions of recommended minimum configurations
for NMEA output and commands sent and received via an RS232 interface based
on the GPS antenna module A1035-H using the on-module antenna. While the first
version foresees that Vcc is applied continuously, the second version assumes a
separate back-up battery. In order to go to Hibernate Mode (low power mode) the
two configurations use different approaches. The first version requires toggling of
the ON_OFF pin and continued supply of Vcc. With the second version a shutdown
command is required; then after a further delay Vcc can be switched off completely.
In both cases the current drawn will drop drastically. See also chapter “
10.8
Hibernate Mode”.
ON_OFF
Tx
Rx
3.3V
GND
Shown from top without lid; pads shown for better understanding
A1035-H
GSC3f/LPx
serial
ON_OFF
Tx
Rx
3.3V
GND
Shown from top without lid; pads shown for better understanding
A1035-H
GSC3f/LPx
serial
Figure 5: Minimum configuration A1035-H with continued Vcc supply
Remarks:
•
Use separate ground plane for antenna ground.
•
External antenna input impedance is 50
Ω
. Match as close as possible.
•
Maximum allowed external antenna current is 50 mA. Consider a current lim-
iter.
•
Supply Vcc continuously, use toggling of ON_OFF to switch between normal
operation and hibernate mode
V1.5 – Dec-09
User’s Manual
Page 11 of 37
