Locating and Fixing Grounding Issues that Cause "Ground Loop" Noise and Digital Misbehavior
Room: 141
Wednesday, September 01
1:00 PM - 5:00 PM
CEU Credits: 4
Speaker(s)
Description
This course is designed to lift the veil of mystery that surrounds occurrences like hum and buzz in audio, and seemingly random misbehavior in digital portions of an AV system. We will explain how AC power indirectly causes these problems and what simple steps can be taken in new systems to minimize or avoid the problems altogether. In existing systems, a simple no-instruments troubleshooting method can pinpoint the cause and location of the noise problem. A variety of solution strategies and devices will be compared with respect to performance, cost, and safety. Some "solutions" actually put your customer's life at risk and expose you to a possible lawsuit. Along the way, some myths and "zombie ideas" (the ones that just won't die) will be explained and de-bunked, of course. Attending this course will not only make you smarter, but you'll avoid the embarrassment and expense of recalls to fix the system ... your hard-earned reputation is at stake!
Tracks:
Topic Category
Systems Engineering
Learning Objectives
- Learn the purpose of National Electrical Code and what's normal for AC power.
- Discover why light dimmers are notorious for causing ""buzz"" noises in sound systems.
- Learn how to use observation, system controls, and simple logic to determine the cause and location of most noise problems.
- Learn how to interpret manufacturers claims and specifications to predict how well a ""solution"" will work
