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Multipath Interference and Diversity Switching
A significant challenge for engineers designing a wireless microphone system is addressing multipath interference. The Audio Ltd A10 digital wireless microphone system devotes significant signal processing resources to achieving robust performance in the presence of both short range and long range multipath. This note briefly explains what multipath is, why it is a problem, and […]
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The Digital Wireless Advantage – Interference and Intermodulation in Multi-Channel Systems
The A10 Digital Wireless System has a significant advantage over analogue FM wireless and other digital wireless systems in its ability to reject interference. This arises because of three main reasons. The A10 uses two cascaded SAW filters. These precision RF filters are excellent at rejecting out-of-band signals. The SAW filters used in the A10 […]
Read The Full Article Analogue v Digital – Companding
Analogue FM wireless system use a compandor circuit in the signal chain to maintain dynamic range. A compander first compresses audio at the transmitter by a fixed compression ratio before RF modulation. At the receiver the signal is then expanded by the same ratio after demodulation. Companders help overcome the noise limits inherent in narrow […]
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The Spectrum Challenge
The UHF spectrum between 470 MHz and 800 MHz is particularly valuable for wireless microphone systems. This UHF range offers technical properties which allow portable systems to operate with a good balance of required RF output power, RF propagation (good both indoors and out), and small antennae size. Wireless microphone systems operating in the 470 […]
Read The Full ArticleSL-6 Informational Overview
Brief overview of the SL-6 powering and wireless system with Matt Anderson, CEO of Sound Devices, LLC. The optional SL-6 simplifies interconnection between the 688 and multiple channels of wireless by accepting three dual-channel slot-in receivers. The device offers all powering and audio interconnection for standard slot-in receivers and additional control and monitoring when used […]
Read The Full ArticleTechnology Revealed: Inside the SL-6
Bonus video footage of Matt Anderson, CEO of Sound Devices, LLC, explaining the inner workings of the SL-6 powering and wireless system. Get a rare look at the technology behind the 688 accessory.
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