The nRF9161 DK is equipped with a small coaxial connector J1 for measuring the LTE or DECT NR+ RF signal.
The connector is of Microwave coaxial connector with switch (SWF) type (Murata part no. MM8130-2600) with an internal switch. By default, when no cable is attached, the RF signal is routed to the onboard antenna. The insertion loss in the adapter cable is approximately 0.5 dB–1 dB.
An adapter (Murata part no. MXHS83QE3000) is available with a standard SMA connection on the other end for connecting instruments (the adapter is not included in the kit). When connecting the adapter, the internal switch in the SWF connector disconnects the onboard antenna and connects the RF signal from nRF9161 to the adapter.
Figure 1. Connecting a spectrum analyzer
