[USRP-users] Question on max. baseband bandwidth: can we go above 120 MHz on the TX side?

Marcus D. Leech mleech at ripnet.com
Tue Sep 23 13:38:19 EDT 2014


On 09/23/2014 01:30 PM, Ian Buckley via USRP-users wrote:
>
> p.s. Marcus, the clock to the DAC is 400MHz but thats because its a QDR interface moving a byte every clock edge.
Ah, yes.  That makes sense.


>
> On Sep 23, 2014, at 9:50 AM, Ruben Merz via USRP-users <usrp-users at lists.ettus.com> wrote:
>
>> Hi list,
>>
>> We were discussing with some colleagues today whether to use a USRP (x300 specifically) to generate wideband noise with a basicTX for testing purpose. According to the data-sheet, the x300 can do 120 MHz of RF bandwidth from the host. But when I look into http://www.trondeau.com/storage/grcon14/presentations/Sep16_05_Ettus_Updates.pdf, I see 300+ MHz on slide 9. And if I look further in the spec, the DAC can go up to 800 MS/s.
>>
>> Therefore my question: if we were to generate signals directly from the FPGA; would it be feasible to generate 400 MHz wide signals (I understand that the basicTX is limited to 250 MHz though)? Where would be the limitation?
>>
>> Thanks for any comment
>> Ruben
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>
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