What are the important points to remember when the WA-TX-03S, WA-RX-03S module is operated on the test board which enables the channel and mute level to be changed?

Channels cannot just be allocated randomly. It is important to create a channel plan in order to avoid third-order intermodulation interference. Mute level sets the received RF threshold. When RF drops below the threshold, the audio output will be muted automatically.

Details:

Third order intermodulation

Also see: WA-03 Testboard operation guide