Wireless Guide


WirelessGuideDownload the Free Wireless Guide

Wireless microphone systems are a key component in almost every broadcast, motion picture, theatrical and sound stage production, as well as corporate, religious and educational venues. The Wireless Guide offers readers an excellent foundation in the concepts of designing and operating a wireless microphone system.

This guide is intended to uncover some of the mysteries behind the operating principles of wireless systems and help the reader separate fact from fiction when selecting a wireless system for a particular application. Far too much propaganda has been published by various manufacturers, with boastful, and sometimes incredible claims about the quality of the equipment being offered. Armed with an understanding of the basic principles of wireless operation, it becomes possible to see through the maze and make intelligent choices.

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FCC & Spectrum Updates

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Broadcast Television Spectrum Incentive Auction NPRM

FCC Auction Update – January 2017

The 600MHz band auction, which began last spring, is finally coming to a long awaited conclusion. After 3 failed rounds, round 4 has met the required conditions for a successful end. This round offered 84MHz of spectrum to the wireless carriers and other interested parties and will result in the loss of TV channels 38-51, (614-698MHz, or Lectrosonics blocks 24, 25 & 26, and Band C1). Remember that channel 37 was, and will continue to be, off limits for wireless mics, so the remaining usable band will be channels 14-36 (Lectrosonics blocks 470, 19, 20, 21, 22 & 23, and Bands A1 and B1).

Once all the bidding concludes, (expected to happen by the end of January), the FCC is faced with the task of reassigning the existing TV stations in the upper 600MHz spectrum to new channels below 608MHz in a process called "repacking". For the time being we know how much spectrum is to remain and where the "duplex gap" will be (see diagram below), but we can't predict what the exact channel lineup your city or town is going to look like.

This news is heartening. Much less spectrum is being lost than we had originally feared. The original goal of the auction, had it been successful, would have taken away 126MHz of the UHF spectrum. We are grateful that the final loss of only 84MHz will be much less harmful to the operation of wireless microphones and other wireless gear.

The final Channel Reassignment Public Notice (CRPN) that the FCC will publish in the coming months will trigger a 39 month "clock" after which time all wireless microphone operation above 614 MHz must cease. That still gives users up to 3.25 years from today to continue using our gear in the affected blocks and bands.

As we have in the past, we are happy to offer re-blocking service for any eligible affected units, at approximately 1/3 to 1/2 the cost of new. Please consult the re-blocking price list for further details. For any questions about re-blocking or to schedule your products for this service, please contact us at 800-821-1121 or This email address is being protected from spambots. You need JavaScript enabled to view it..

We will continue to update this page as the news from the FCC is published.

The diagram below shows the resulting TV band spectrum with detail on the 11MHz Duplex Gap and 3MHz channel 37 Guard Band.


Lectrosonics is very concerned about these issues, and we hope to do everything possible to make you aware of what is happening and help you with the transition. If you have any questions, please don't hesitate to contact us.