How to connect spectrum analyzer with NRF52840-DK?

Hi,

We were planning to use a spectrum analyser in order to do the radio test on the nrf52-dk. Where should the analyzer be connected? Should it be connected to the J1 connector on the nrf52-dk?

Also J1 connector is SWF type. Are SWF and SMA connectors both of the same type ? If it is, then would this cable work ? www.amazon.com/.../B007PPHUO2