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11.25.2009
Originally featured on BroadcastEngineering.com
Lectrosonics chooses THAT’s balanced line receiver ICs for D4 wireless system

Lectrosonics, a provider of high-end wireless microphones, has selected THAT’s InGenius 1200 series high-CMRR balanced line receiver ICs for its D4 multichannel digital wireless audio link system.

Lectrosonics’ D4 system comprises the D4T digital transmitter and the D4R digital receiver, which shuttles four discrete audio channels over a range of up 1200ft or more using the license-free ISM 902MHz-928MHz band for freedom from DTV interference. Key system specifications include a frequency response of 20Hz to 20kHz, ±0.5dB; THD of 0.04 percent at 1kHz; and dynamic range greater than 104dBA. Latency for the D4 is less than 1 ms for digital I/O.

Lectrosonics said it chose the InGenius balanced line receiver ICs for their outstanding CMMR performance with a wide variety of source types and impedance ranges. This is a critical feature that helps preserve audio quality in wireless sound transmission.

In the four-channel mode, the D4 system operates on one of four 4MHz channels in the 902MHz-928 MHz band. Each channel carries four separate audio signals, digitally multiplexed within a common carrier.

The audio quality is ideal for sports production. It offers 48kHz/24-bit audio, ruler-flat 20Hz-20,000Hz frequency response; ultralow distortion and high dynamic range assure excellent audio reproduction. And any external power source in the 9V-16V range may be used.



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