GSM

ClockTamer

ClockTamer is a device manufactured by Fairwaves to provide a low-cost small-size configurable clock generator with GPS sync option. It was specifically designed to be used with USRP, but nothing prevents you from using it with other device of your choice given it has external clock input.

UmTRX

UmTRX provides a single board solution for industrial SDR applications which require the frequency stability and accuracy of a GPS synchronized clock, and supports two full-duplex and fully independent RF channels which can run on any frequency from 0.3-3.8GHz.

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