Lectrosonics, a provider of high-end wireless microphones, has selected THATâ€™s InGenius 1200 series high-CMRR balanced line receiver ICs for its D4 multichannel digital wireless audio link system.
Lectrosonicsâ€™ 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, Â±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.