The documents below are recommended reading for anyone who hasn’t mastered the art of RF optimization.
This Lectrosonics Wireless Guide is a bit long in the tooth but still incredibly informative.
Lectrosonics – Wireless Guide
This RF Venue document requires providing some information to receive it but it’s well worth the effort.
RF Venue – Three Essential Concepts In Wireless Audio
Shure’s Wireless Systems Guide for Antenna Setup
shure – Wireless Systems and Antenna Placement PDF