What is intermodulation?
Simply put, intermodulation is the mixing of signals in (nonlinear) circuits such as receivers and amplifiers to create additional, undesired signals. Imagine two microphones, operating on frequencies A and B. Intermodulation products will occur on any frequency that meets this requirement: (±mA) + (±nB), where m and n are integers greater than zero. So, for example, an intermodulation product will occur on 2A-B. Because of this, it is necessary to ensure that no other microphones operate on that resulting frequency. Additionally, in systems with more than two systems, products occur on any combination of frequencies: (±(x_1)*(F_1)) + (±(x_2)*(F_2) + … + (±(x_n)*(F_n)), where x_n is an integer greater than, and F_n is a frequency used by a wireless microphone. As you might imagine, this formula (and indeed the first one as well) predicts an infinite number of combinations. The good news is that the higher-order products (where x_n is larger than 5 or so) tend to be much, much lower in
Simply put, intermodulation is the mixing of signals in (nonlinear) circuits such as receivers and amplifiers to create additional, undesired signals. Imagine two microphones, operating on frequencies A and B. Intermodulation products will occur on any frequency that meets this requirement: (±m*A) + (±n*B), where m and n are integers greater than zero. So, for example, an intermodulation product will occur on 2A-B. Because of this, it is necessary to ensure that no other microphones operate on that resulting frequency. The most common and strong products are those of the form 2*A-B and 2*B-A. Additionally, in systems with more than two systems, products occur on any combination of frequencies: (±(x_1)*(F_1)) + (±(x_2)*(F_2) + … + (±(x_n)*(F_n)), where x_n is an integer greater than, and F_n is a frequency used by a wireless microphone. As you might imagine, this formula (and indeed the first one as well) predicts an infinite number of combinations. The good news is that the higher-orde
