Robustel R1520 User Guide
RT056_UG_R1520_v.1.0.3 Dec. 25, 2021 20/159
2.9 Attach External Antenna (SMA Type)
Attach an external SMA antenna to the router’s antenna connector and twist tightly. Make sure the antenna is within
the correct frequency range provided by the ISP and with 50 Ohm impedance.
Note: Recommended torque for tightening is 0.35 N.m.
SMA-K antenna for
GPS connection
SMA-K antenna for cellular
connection (When there is
only one antenna, it is
connected to MAIN)
RP-SMA-K antenna for
WLAN connection
SMA-K antenna for
cellular connection
RP-SMA-K antenna for
WLAN connection
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