Time synchronization generating PN sequences in USRP N210?

GNU Radio
1

I am going to buy a N210 USRP that I would like to use to transmit a
PseudoNoise sequence exactly at the arrival of a 1 PPS signal from an
external source (or every 10 milliseconds from the 1 PPS transition).

Is it possible to do that? If it is possible, can I do that using
GNURadio (better if via the GRC)?

Which is the time accuracy I can obtain?

Can I find any example of that?

Thank you in advance.

Piero

2

Piero T. wrote in post #1104765:

I am going to buy a N210 USRP that I would like to use to transmit a
PseudoNoise sequence exactly at the arrival of a 1 PPS signal from an
external source (or every 10 milliseconds from the 1 PPS transition).

Is it possible to do that? If it is possible, can I do that using
GNURadio (better if via the GRC)?

Which is the time accuracy I can obtain?

Can I find any example of that?

Thank you in advance.

Piero

Hello,
I’m not sure if I got it right, anyway, here are some links :slight_smile:

http://files.ettus.com/uhd_docs/manual/html/sync.html
http://www.ettus.com/content/files/kb/mimo_and_sync_with_usrp.pdf

Ciao Piero,
Fabio
iz5xrc

3

Hello Fabio,
thank you for your reply. I had already located those info, but I
still do not know the time accuracy I can obtain and if I can manage
everything from GNU Radio Companion and using which blocks.

For example, if I generate the PseudoNoise using “Galois LFSR
pseudo-random source”, have I to say to “Galois LFSR pseudo-random
source” that its sequence has to start exactly at 1 PPS or there is a
different
way?

In which way the synchronization request is handled inside the FPGA?

Has anyone got experience on this topic?

best regards

Piero, I0KPT