User manual

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8
SIM & SD Card Compartment
UHF Radio Antenna
Figure 2: APS-3, Rear View
The rear view of the APS-3 shows the door to access the SD card and SIM card.
GNSS raw data can be saved to the SD Card, and the SIM card allows cellular service
with the internal GSM modem.
The ports and the product label can be seen on the underside of the APS-3.
There are 3 ports: two serial ports and one external power input port. Also located on the
base of the APS-3 is a TNC connector for a UHF antenna, which is utilized by the internal
radio. ALWAYS connect a UHF antenna before powering ON the APS-3. The
threaded connector in the middle is a standard 5/8” connector for mounting onto survey
poles or accessories.
NGS relative calibration value for the APS-3 L1 vertical offset is 113.5 mm. See
http://www.ngs.noaa.gov/cgi-bin/query_cal_antennas.prl?Model=APS for information.
Data (8-pin LEMO)
Power (4-pin LEMO)
Control (5-pin LEMO)
Model & Serial #
5/8” Thread Nut
CE / FCC / Bluetooth® Label
TNC Connector for UHF Radio
Antenna
Figure 3: APS-3, Bottom View