Phil Allison wrote:

** I seriously doubt you will find any UHF *mic* receives where the
frequency range is wider than a few percent of the centre frequency. This
is a result of the RF stages having to work without frequency tuning over
the whole range the receiver is capable of.

For example, an 840 MHz Sennheiser receiver might operate over a 32 MHz
range or about 3.7 %.

Ah ok. Whats the ideal then? Using radio scanners or trying to make
sure that all our equipment operates in the 3.7% range?