Tiny Spectrum Analyser - Any Good?

Two fingers... a brown one w/ 2 ears and a black one w/ 2 ears.

 

Sorry, one mistake in my previous post.
I wrote "
If you want to tune an antenna with a network analyzer you will need aditional equipments
- tracking generator or noise source
- Reflection bridge"

I meant:
"If you want to tune an antenna with a spectrum analyzer you will need aditional equipments
- tracking generator or noise source
- Reflection bridge"

Sorry for confusion.

 

Its been calibrated and using the supplied telescopic antenna in the Low socket, when I switch it on it seems to take a random length of time to show any activity on the trace. It boots OK but just shows a noise floor for maybe 55 seconds then it bursts into life showing the full spectrum from 0Hz to 350 Hz. But with another power cycle it may take over a minute to do this and sometimes it doesn't do it at all. Any ideas?