Re: [USRP-users] One sample - 5 ns delay between the two RF signals/ X310

2019-09-27 Thread Cherif Diouf via USRP-users
fabian, I have tested your solution, but the get_time_last_pps always gives me the expect value. Daniel, On a different point, the issue might be related to timing, here are some examples of timing related to the DACs. The compilation is successful but the margin is very low, in the 10 ps

Re: [USRP-users] E320 unable to lock to external reference

2019-09-27 Thread Jason Matusiak via USRP-users
Nate, Thanks, this did the trick. Edited /usr/lib/python3.5/site-packages/usrp_mpm/periph_manager/e320_periphs.py on the E320 with the changes and now it locks perfectly (tested only in network mode). Thanks for finding this and pushing it out! From: Nate Tem

[USRP-users] USRP X310 problem

2019-09-27 Thread Aaron Montilla via USRP-users
Hi, I am trying to set the connection between my PC and my USRP X310. I ran the command uhd_find_devices, and successfully it found the USRP. Then I use the uhd_usrp_probe command and I had the next error: aaron@leonard:~$ uhd_usrp_probe [INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501; UHD_

Re: [USRP-users] One sample - 5 ns delay between the two RF signals/ X310

2019-09-27 Thread Fabian Schwartau via USRP-users
No, it was a 3.3V CMOS variant of that IC. I cannot figure it out as I would have to take the hardware apart. Am 27.09.2019 um 09:30 schrieb Daniel Jepson via USRP-users: Fabian, I noticed on the SN74LS125A datasheet the minimum input voltage is 4.75V. Is this the correct part that you're usi

Re: [USRP-users] One sample - 5 ns delay between the two RF signals/ X310

2019-09-27 Thread Daniel Jepson via USRP-users
Fabian, I noticed on the SN74LS125A datasheet the minimum input voltage is 4.75V. Is this the correct part that you're using? -Daniel On Fri, Sep 27, 2019 at 9:27 AM Daniel Jepson wrote: > Thanks Fabian. As long as the input PPS is driven by the same RefClk that > is provided to the X310, this

Re: [USRP-users] One sample - 5 ns delay between the two RF signals/ X310

2019-09-27 Thread Daniel Jepson via USRP-users
Thanks Fabian. As long as the input PPS is driven by the same RefClk that is provided to the X310, this system should be ok. You might also consider driving the PPS on the falling edge of the RefClk to ensure timing is met at the X310. There are some timing constraints here that might affect perfor