The Frequency Didn't Change. The Environment Did.

A few weeks ago I got a call that probably sounds familiar to a lot of engineers.

"These frequencies worked yesterday."

The implication, of course, was that something must be wrong with the equipment.

The gear was the same. The coordination file was the same. The frequencies were the same.

The RF environment was not.

That's one of the hardest lessons for people coming into wireless audio. We naturally think of frequencies as fixed. If something worked yesterday, we expect it to work today. Unfortunately, RF doesn't care what worked yesterday.

A venue can be completely different from one day to the next. Temporary television crews arrive. Production offices install wireless networks. Vendors show up with hotspots. Security teams bring radios. The crowd arrives carrying thousands of devices that weren't there during load-in.

The frequency didn't change.

The environment did.

One of the core ideas I discuss in Surviving the Hot Seat: The RF Edition is that successful RF coordination isn't about finding frequencies. It's about understanding the environment you're working in and verifying your assumptions every day.

The frequencies are just the final result of that process.

The next time somebody says, "These frequencies worked yesterday," they're probably right.

The question is whether yesterday's RF environment still exists today.