samplerate only half of what it should be

[Hendrik]

I made some recordings around 2402 MHz with a bandwidth of 5MHz, when I use "[y,Fs] = audioread(<file>)" in matlab, I only get a samplerate of 5MHz, while it should be atleast 10.
Is there any way I can manually set the samplerate or should I just record a bigger bandwidth?

[Hendrik]

this forum doesn't seem very active, I didn't know it stored complex samples, so 5 MHz is enough.