Enter-Tech Selects Nordic's Ultra-Low Power nRF2401A For Wireless Connectivity
The transceivers at each end of the wireless link relay high-quality audio and operational commands. The microphone also acts as a remote control that is unaffected by obstacles such as people and chairs, and does not require "line-of-sight" connection. The nRF2401A operates in the 2.4 GHz ISM band and works up to 10 metres from the main station. Uninterrupted transmission is assured by the transceiver's ability to switch in less than 200 µs between any of 125 channels should interference be detected on a particular channel. These attributes are important in a crowded bar or club where users want to move around the stage unencumbered by wires and where other sources of 2.4 GHz transmissions could be present.
The ED-11000 Series Karaoke System is a digital unit comprising wireless microphone with built-in RF remote control and main station with USB interface. The microphone can be recharged from the main station. The system is aimed at the Korean, US and Japanese markets and has been in production since late 2006. The ED-11000 boasts superior sound and a long battery life in part because of the nRF2401A's nominal 1 Mbit/s air data rate, and ultra-low power consumption characteristics - supply current is 10.5 mA peak (TX) at -5 dBm output power and 18 mA peak (RX) in receive mode.
Enter-Tech selected the nRF2401A because the company required a device with a range of up to 10 metres and proven immunity to interference. In addition, Enter-Tech valued Nordic's RF expertise, which eased the design challenges and shortened the time-to-market design cycle.
"We knew of Nordic's involvement with other audio market customers and how well the nRF2401A performed," comments Harrison Lee, Enter-Tech's Senior R&D Manager. "This proven track record gave us full confidence in the viability of this product for our application."
SOURCE: Nordic Semiconductor ASA