[USRP-users] Frequency setting of USRP X300 with Basic TX

Martin Braun martin.braun at ettus.com
Wed Jul 5 17:32:28 EDT 2017


On 06/26/2017 07:18 PM, Bright Cheng via USRP-users wrote:
> 
> Hi,
> 
> I am testing X300 with Basic TX.
> When I use "tx_waveform" to generate waveform at 220MHz, the "Actual TX
> Freq" displayed is 20.0 MHz.
> How can I actually configure the device to generate waveform at 220MHz?
> Thank so much.

Bright,

the BasicTX doesn't have an LO, so it can only digitally move the signal
within +- 100 MHz. If you measure at 220 MHz, you'll also see the signal
there... by the magic of aliasing!

-- M




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