Re: [USRP-users] Using GPS disciplining on E310

2020-12-07 Thread Rob Kossler via USRP-users
Hi Ofer, I don't really know the answer but you might want to search past posts on the topic of E310 gps synchronization. Some of the posts are fairly old (~2016, 2017), but they indicate timing accuracies that are on the order of several microseconds. Perhaps this is related to the E310 having a

Re: [USRP-users] Using GPS disciplining on E310

2020-12-05 Thread Ofer Saferman via USRP-users
Hello Rob, Thanks for the response. I am not trying to get the LOs to sync in phase. I know that is not possible unless I use a common external LO. I have a method to find and cancel the phase difference of caused by the LOs. I am only trying to get the base-band Tx samples to be synced. I was won

Re: [USRP-users] Using GPS disciplining on E310

2020-12-04 Thread Marcus D. Leech via USRP-users
On 12/04/2020 03:46 PM, Rob Kossler via USRP-users wrote: Hi Ofer, Here is my understanding - The E310 can sync to a PPS signal (either external input or obtained from GPS). From this PPS, the E310 derives the 10MHz ref signal and uses that as ref for LO signal. So, there will be lots of phas

Re: [USRP-users] Using GPS disciplining on E310

2020-12-04 Thread Rob Kossler via USRP-users
Hi Ofer, Here is my understanding - The E310 can sync to a PPS signal (either external input or obtained from GPS). From this PPS, the E310 derives the 10MHz ref signal and uses that as ref for LO signal. So, there will be lots of phase variation between the LOs in all of your E310 devices even t

[USRP-users] Using GPS disciplining on E310

2020-12-04 Thread Ofer Saferman via USRP-users
Hello, I would like to synchronize several E310 devices. It is my understanding that the only way to do that is by connecting a GPS antenna and performing disciplining to a derived 1-PPS signal. I have a few questions to help me better understand how to make it work: 1. Does GPS disciplining achiev