The setup and the handling are the same with RF signals from a fixed transmitter and a mobile receiver – as with in-ear-monitoring – or the other way round as with wireless microphone systems. Therefore, the same basics as with wireless microphone systems are valid.
INFO: Bodypack receiver
In most cases bodypack receivers are non-diversity (with one antenna). As mentioned above, diversity systems work most effectively with a 40 cm distance between the antennas. As the distance becomes less (as in the case of a small bodypack receiver) the diversity effect does not work properly anymore. The performance increase does not justify the higher cost associated with a diversity receiver. Additionally, it is not as critical as with a wireless microphone if short sound drop outs occur.
Again, if antennas are too close to one another they interact and create interferences. Reducing the number of transmitter antennas in close proximity reduces the chance of experiencing sound drop outs. Similar to the antenna splitters with wireless microphone systems there are antenna combiners available for in-ear-monitoring systems. These units combine multiple wireless transmitter antennas to one antenna and lead to the best possible performance.
INFO: Radiointerference with In-Ear Personal Monitoring
In-ear-monitoring transmitters and wireless microphone receivers interact heavily. Therefore, a minimum distance of 3 meters is recommended. The best way is to separate those systems in two different racks
Setup Snapshots for In-Ear Personal Monitoring
