|Subject:||Re: Phase Synchronize 2 USRP N200 w/ SBX cards|
|Date:||Thu, 10 Jun 2021 11:39:38 +0000|
Yes, I know that about GNURadio and the timed commands. I just described the flowchart here.
After I generated that flowchart in GNURadio I edited the timed commands in the generated python file, according to the code I included in my very first message in this thread.
So the timing is definitely done properly.
I also switched to QT GUI time sink, as you proposed, and I still observe a different phase offset at every experiment.
I am using 22.214.171.124 version of GNURadio.
Thanks for your help.
From: Marcus D. Leech <email@example.com>
Sent: Thursday, June 10, 2021 2:26 PM
To: Skyvalakis Konstantinos
Subject: Re: Phase Synchronize 2 USRP N200 w/ SBX cards
On 06/10/2021 04:50 AM, Skyvalakis Konstantinos wrote:
Gnu Radio does NOT emit code that wraps the tuning requests in timed commands, so the synthesizers won't be properly
tuned for phase synchronization. ALSO the WX GUI Scope sink had (as I recall) a bug that caused things to appear out
of phase even if they weren't. You should probably use the QT GUI time sink instead--what version of GR are you using?
The WX GUI widgets have been deprecated for several years now, and don't even appear in later versions of GR.
You'd have to modify the generated code to have it wrap the tuning requests in timed commands.
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