Sennheiser Seeks OK for Expanded Wireless Mic Bandwidth Use
Sennheiser is asking the FCC to start allowing low-power auxiliary stations, including wireless mics, to use more bandwidth in the TV bands and 600 MHz duplex gap when they employ new technology. In a petition posted Friday, Sennheiser said existing…
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wireless mic technology lets engineers use at most 12 such devices in a 6 MHz channel, but it and other manufacturers are developing wireless multichannel audio systems (WMAS) that combine the signals from multiple devices into a 6 MHz channel instead of giving each its own separate frequency segment. It said spreading each connected device across the full channel width, WMAS allows denser use of the channel by ending the problem of multiple receivers picking up adjacent frequencies. The company asked for amendment of a Section 74.861(e)(5) rule on low-power auxiliary stations so it defines WMAS and allows WMAS system use of 6 MHz of bandwidth when providing the same or better spectrum efficiency as conventional single-channel systems.