You -should- be able to receive a perfectly good image up to the specified range for CE & FCC modes, especially if the camera's antennas are facing sideways (antennas are mounted in the sides) therefore facing you. Likewise the flat top of the Range Extender should be facing the Vision (its antennas are located under the top case).
You could park it at one end of your block and walk to the other end so long as you have clear line-of-sight and no objects in between. Your picture should be as sharp as 640x480 can be on your device with no blocking or lower-quality downgrading of streaming video.
If you're not getting that, its time to troubleshoot. Since the camera's FPV transmitter has two outputs, rotate the Vision 180° and face the other antenna on the camera towards you. Any improvement? If so, then your first output may be low, time to contact DJI and get the Camera's wifi transmitter fixed. If you've modded the camera to add an external antenna, open the camera and double-check your work.
If not, then maybe its the Range Extender. If you've modded it to experiment with adding external antennas, open it and inspect your work. Look for antenna connectors popping off the board, pinched cables, or damaged cables at the base of the RP-SMA connector you added. When in doubt, replace the cable.
Another possibility might be phone settings: hopefully your device (phone, tablet, pad) is configured properly and has a solid connection to the Range Extender and that's not the issue.
I hope these suggestions help.
iDrone :ugeek: