I'm using a UBX-160. I did a quick dig and didn't see anything on the spec sheet or daughterboard section of the manual.
Ryan On Tue, Oct 16, 2018 at 7:59 PM, Brian Padalino <bpadal...@gmail.com> wrote: > It would depend on the daughterboard being used with the X300 I believe. > > Which daughterboard are you using? > > Brian > > On Tue, Oct 16, 2018 at 7:23 PM Ryan Marlow <r...@lmarlow.com> wrote: > >> Hey Brian, >> Thanks for the suggestion. I think that idea should work for me. Is there >> anywhere that documents the X300 TX ramp up time? >> Best, >> Ryan >> >> On Tue, Oct 16, 2018 at 6:28 PM, Brian Padalino <bpadal...@gmail.com> >> wrote: >> >>> Maybe ramp up time for the transmitter? >>> >>> If you send 2.5us worth of 0's before your 1000 samples, do you see the >>> appropriate number of pulse burst length? >>> >>> This method would be a compromise between the two methods you >>> described. Does that work for you? >>> >>> Brian >>> >>> On Tue, Oct 16, 2018 at 6:19 PM Ryan Marlow via USRP-users < >>> usrp-users@lists.ettus.com> wrote: >>> >>>> Hey All, >>>> I am trying to transmit a series of pulses with the X300 and am seeing >>>> some odd behavior. I want to transmit a set number of samples in a pulse, >>>> let's say 1000. At 200 MSPS (the tx rate in the radio core) I would expect >>>> this burst to last approximately 5us. Yet, when I receive the data, I see a >>>> burst that is shorter by half, approx 2.5 us. To send these bursts, I am >>>> sending a timed burst of 1000 samples to the Radio with significant space >>>> in between. Odder still, when I increase my pulse to 2000 samples, >>>> expecting a pulse of 10 us, it is shortened again by 2.5 us, making the >>>> pulse 7.5 us. I can confirm with an ILA that the Radio core is receiving >>>> all pulsed samples and they are passed to the daughterboard interface. Is >>>> there an obvious explanation for this behavior that I am overlooking? >>>> One solution I have devised is generating a constant stream of data in >>>> place of the gaps between pulses that contain zero'd data. So it would look >>>> like this >>>> Data x 1000 -> zeroes in place of gaps -> repeat. >>>> In my original method, the transmitter is only active during the >>>> pulses. In the alternative solution, the transmitter is active the whole >>>> time. >>>> This solution gives me the behavior that I want but I am curious as to >>>> why the pulses are shortened. >>>> >>>> Thanks, >>>> Ryan Marlow >>>> >>>> -- >>>> Ryan L. Marlow >>>> R L Marlow Consulting LLC >>>> rlmarlow.com >>>> _______________________________________________ >>>> USRP-users mailing list >>>> USRP-users@lists.ettus.com >>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>>> >>> >> >> >> -- >> Ryan L. Marlow >> R L Marlow Consulting LLC >> rlmarlow.com >> > -- Ryan L. Marlow R L Marlow Consulting LLC rlmarlow.com
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