What is Signal Noise and How to Prevent It?

What is Signal Noise?

Industrial environments are a battlefield for sensitive electronics. Motor drives (VFDs), large contactors, and welding machines emit "electromagnetic interference" (EMI). This noise rides onto sensor cables and behaves as if it were a real signal.

What Are the Consequences?

• Unstable, fluctuating measurement values.
• Triggering of false alarms.
• Damage to sensitive electronic boards.

How to Prevent It?

1. Shielded Cable: Protects the cable like armor.
2. Differential Signal: RS485 or differential analog inputs mathematically eliminate noise.
3. Digital Filtering: The Adaptive Digital Filter in Amazeng devices analyzes the incoming signal and separates noise frequencies from the real signal to clean it up.

In noisy environments, instead of carrying analog signals, using a GDT Digital Transmitter that digitizes the signal at the source is the definitive solution.