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Figure 6 shows the minimum configuration for NMEA outputs and commands sent
via an RS232 interface based on the GPS/GLONASS module A5100-A using a
passive antenna and with backup voltage on V_BAK. Before removing Vcc, it is
highly recommended to put A5100-A into hibernation mode either by ON_OFF pin or
software command
. Otherwise, high current drain will die out the backup battery in a short period of
time.
Remarks:
• External antenna input impedance is 50 Ω. Match as close as possible.
• A battery back-up circuit for the RTC (Real Time Clock) should be considered
(see chapter: "10.6 Battery Back-up")
V1.0-Mar-14
Figure 6: Minimum configuration A5100-A with Vbak
User's Manual
Page 14 of 43
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