What is 600 MHz spectrum used for?

In 2010, the FCC prohibited the use of wireless mics and devices on unused broadcast channels on the 600 MHz service band and on the 700 MHz band – specifically the frequencies between 698 and 806 MHz.

A safe minimum distance of no less than 1 MHz should be placed between each microphone. Spacing channels an even distance of 1 MHz apart, however, risks creating harmful intermodulation products.

Sound recordists should not use or buy 600 MHz frequency wireless audio, not only to avoid a fine, but because of the potential interference when operating a device .13 Tem 2020

Legal & Illegal Frequencies & Channels In the United States ChannelFrequencyUnited States(MHz)40/20 MHz1834915ILLEGAL1844920ILLEGAL1854925ILLEGALLegal & Illegal Frequencies & Channels In the United States www.data-alliance.net › blog › legal-illegal-frequencies

The majority of the frequencies (downlink and uplink) are allocated to O2, Vodafone and Telekom for the provision of the mobile Internet. Between the downlink and uplink there is the so-called middle gap (duplex gap) of 822 MHz to 832 MHz.

What is a duplex gap. The 600 MHz duplex gap is an 11 megahertz frequency band at 652-663 MHz that separates part 27 600 MHz service uplink and downlink frequencies .