The E4000 has an RF input frequency range from 64MHz to 1700MHz. It offers the ability to be re-configured under software control to support additional broadcast standards in the VHF, UHF and L bands. For digital TV this is important as there is a profusion of standards across the world. It means that manufacturers can use a single tuner worldwide, allowing them to cut development time and costs.
Designed to interface directly to a digital demodulator, the E4000 has a fully integrated low noise amplifier (LNA), programmable RF filter, and an RF mixer. The wide tuning range of the synthesiser and the programmable IF channel filter allows the user to cover a wide frequency spectrum and different broadcast channel bandwidths.
The E4000 tuner uses a zero IF architecture, which reduces the number of external components required and ensures that the device is suitable for high volume consumer electronics applications.
Elonics low power DVB-T/H terrestrial broadcast radio frequency (RF) tuner consumes 105mW in continuous mode and 13mW in time sliced mode.
The E4000 CMOS tuner uses a proprietary technology called DigitalTune. This is a radio frequency architecture that allows each stage of the RF signal processing to be adjusted under digital control.
This has benefits over traditional tuners that use analogue control voltages to manage the RF signal gain. As well as providing superior flexibility, it is used to adjust the performance of the tuner for optimum linearity or noise figure according to signal conditions.
More information: www.elonics.com