Got ~10x Surveilzone (Foxeer) VTX’es around, from 25mW to 600mW, also 25/200mW Aomway and decided to check what’s inside.
Testing setup – RFE + attenuator chain. 60dB attenuation + 3dB offset in RFE, so in total you need to add ~63dB to visible averaged result on graph. All tests done on C1 channel (5705MHz).
Absolute power ouput is not precise, relative – much better (0.5dBm or better).
Cold testing – ~10s after powering on (already full averaged cycle), hot – after 5 minutes on my desk.
This looks like: