2. Insert the SIM card according to the illustration at the bottom of the battery compartment (put the
gap inside and the chip facing down).
Figure 4-1-1 SIM card installation
4.2 Data cable
1. Mini USB data cable: to connect the iRTK5 host and the computer to upgrade the firmware and
download static data.
Figure 4-2-1 Mini USB data cable
2. Five-pin data cable (DG-3): to connect the host and external radio to transmit differential data.
Figure 4-2-2 Five-pin data cable
3. OTG cable: for USB flash disk’s OTG firmware upgrade and static data download.