Re: [USRP-users] B200 PPS signal question

2020-11-22 Thread Aaron Holtzman via USRP-users
On the b200mini, the 1pps actually *does* steer the internal reference. Which is different behaviour then the rest of the entire Ettus lineup I believe. For details on how it works, see uhd/fpga/usrp3/top/b2xxmini/b205_ref_pll.v. It autodetects the external reference type and applies the appropria

Re: [USRP-users] b200mini 1pps lock problem

2020-08-14 Thread Aaron Holtzman via USRP-users
On Thu, Aug 13, 2020 at 4:53 PM Marcus D. Leech wrote: > Has it always had this problem, or did it develop over time? > This is a new development, so yes. If you revert to UHD 3.14 does it display the same issue? > Yes. Does anyone have an FPGA build with chipscope hooked up to the b200_ref_

Re: [USRP-users] b200mini 1pps lock problem

2020-08-13 Thread Aaron Holtzman via USRP-users
On Thu, Aug 13, 2020 at 3:14 PM Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > How are you detecting "lock" By querying the "ref_locked" sensor, and also looking at the LED which is consistent. > Could you share a code snippet of how you set up the clocking parameters?

[USRP-users] b200mini 1pps lock problem

2020-08-13 Thread Aaron Holtzman via USRP-users
Hi there, I have a problem with my b200mini application, where it will lock to my GPS sourced 1PPS when run 'cold', but if I restart the application it never locks. After I unplug the b200mini and let it sit for a while, it will work again. I can also hit the TCXO with a little bit of canned air a

[USRP-users] e320 GPIO pinout

2019-08-27 Thread Aaron Holtzman via USRP-users
The pinout for the e320 GPIO connector at https://files.ettus.com/manual/page_gpio_api.html does not indicate which pin is used for the return current. Is it pin 17 (non-mini HDMI) which HDMI uses for the single ended signal return? On a related note, will the schematics for e320 ever be released?