Further important information on antenna usage
Reflecting surfaces
Electrically conducting surfaces (e.g. ceilings with metal constructions) can reflect the RF signal.

The signal is reflected by the electrically conducting surface. At worst, the blue signal and the red reflected signal are out of phase when they reach the receiver so that the two signals cancel each other out.
Blocking effects from other transmitters
As with all wireless microphone systems, suboptimal positioning of transmitters can lead to blocking effects.
To avoid this, please follow these recommendations:
Rule of thumb for distance from the blocking area:

Example:

