Spectrum analyzer for signals transmitted by ADF7242

Hi,

I am trying to transmit signals using ADF7242 at 2.4 Ghz. The chip supports IEEE 802.15.4 std. I would like to see the signal strength of the received signal and it's bandwidth. I don't have a spectrum analyzer! The next choice was to use some wifi spectrum analyzer app but wifi follows IEEE 802.11 and rtl-sdr also can't be used since it's max freq is only upto 1.7Ghz.

Could someone please suggest a way to analyze the spectrum of the signal transmitted using ADF7242. Some app that can be of help..