First, if you are having trouble with your wireless mics, answering the following questions in your initial post will help us solve your problem quicker. - What problem are you seeing? Is it dropout, interference, completely nonfunctional, etc? - How many systems are you using? - What make and model are your systems (could be multiple) - What band-split do the systems operate in (could be multiple) - What frequencies (channels) are each mic set to? Are these frequencies coordinated using software (see the FAQ in a separate thread)? - Where are the receivers located in the facility? - Where are the receiver antennas located? - Are you using any kind of antenna split/distribution system? - Do you have any other wireless devices in the area (TV-band, so things like wireless intercom, IFB/In-Ear Monitors, etc. NOT Wi-Fi, this won't affect mics). - What is your zip code? (if in the USA) - What solution(s) have you tried already? Did it help, hurt, or do nothing? - Do you have your manual around? Second, I've decided to post a list of frequently asked questions relating to the RF side of wireless microphones, digital TV, the 700 MHz auctions, and related issues. It will be geared toward the United States, but I will try to research other countries' laws if it is requested. The FAQ is very much a work in progress, and I will be updating it regularly. Please feel free to post additional questions, and I'll try to answer them and add them to this FAQ. New May 20, 2008: I've added the tutorial to my website, and to keep things simple (so I don't have to update both places every time I change it). New September 8th, 2008: Added information about 900 MHz wireless mics (DON'T BUY THEM!) and the NPRM for the 700 MHz spectrum. New November 7, 2008: Updated to reflect the reality of White Space Devices. New February 9, 2009: Updated to reflect DTV delay. New September 18, 2009: Minor content modifications and a new URL. New January 16, 2010: Updated to reflect new FCC rules with respect to wireless mics. New December 24, 2010: Updated to reflect new TV Band rules released in September. Also made minor clarifications and typographical fixes. New November 27, 2018: Updated to tweak wording. Last Updated: November 27, 2018. http://www.benonis.net/wireless-mic-faq/ Also: Do Antenna Distros Prevent Intermod?