Panasonic WX-SR202P Mode D'emploi page 38

Settings
■ Wireless synchronization settings
Enabling wireless synchronization allows to reduce interference from other 1.9 GHz digital
wireless systems when using multiple systems (receivers) installed on the same floor or
otherwise in the vicinity of each other.
1
When enabling wireless synchronization, choose the receiver which will
act as main system.
Example: Wireless synchronization between several systems (receivers) in the same
room
Sub-system
Change the wireless synchronization setting of the system (receiver) in the central
room to "main system" to act as the main system.
For all the other systems (receivers) which you want to synchronize, configure the
wireless synchronization option to "sub-system" to act as sub-systems.
The reference antennas of the sub-systems must be placed within range of the
reference antenna of the main system. Also read "Installing antennas" (page 30) and
"Antenna field selection" (page 36) about the average wireless reach of the antennas.
Receiver
Configuration switches
38
Reference antenna
Synchronization indicator
Reference antenna
Main system
* The switch cover is removed in this illustration
Reference antenna
Sub-system