The nRF7002 DK is equipped with two small coaxial connectors to measure RF signals from the nRF7002 (J1) or nRF5340 SoC (J7) using a spectrum analyzer.
The connectors are 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 chip antenna.
In this example, a test probe (Murata part no. MXHS83QE3000) is used with a standard SubMiniature Version A (SMA) connection for instruments (the test probe is not included with the kit). When connecting the test probe, the internal switch in the SWF connector disconnects the onboard antenna and connects the RF signal from the nRF5340 SoC to the test probe.
The connector and test probe add loss to the RF signal, which should be taken into account when measuring. See the following table for more information or consult the test probe user guide if you are using another model.
| Frequency (MHz) | Loss (dB) |
|---|---|
| 2440 | 1.0 |
| 4880 | 1.7 |
| 7320 | 2.6 |