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John Orlando john at epiqsolutions.comOn Sat, Oct 13, 2012 at 3:47 PM, Alexander Chemeris <alexander.chemeris at gmail.com> wrote: > Hi Srdjan, > > We're looking into re-purposing UmTRX for LTE and there a few things which > we need to understand better. > > 1. Is it possible to support 15MHz and 20MHz LTE channel bandwidths? To > achieve this we at least need to sample at 23.04Msps and 30.72Msps > respectively. LMS6002D datasheet specifies the maximum I/Q samplerate of > 14Msps, which is not enough. But at the same time, datasheet claims that ADC > and DAC are specified up to 50Msps. How does this fits together? Alexander, Can you provide a reference to where the datasheet calls out a max I/Q sample rate of 14 Msps? The analog low pass filters support a max bandwidth of 14 MHz (which leads to 28 MHz RF bandwidth assuming zero-IF operation)...is this what you're referencing? We run the A/D converters in the LMS6002d at sample rates greater than 14 Msps all the time, including 30.72 Msps. -- John Orlando Epiq Solutions http://www.epiqsolutions.com