Data synchronization error when processing VRT packets

Both -6 and -11 are related to network data loss. -11 is simply an indication of UDP packet loss, and assuming packet loss continues or is bad enough you will eventually see a -6 (device connection loss). -11 is generally bad enough that you can’t trust the I/Q data fully anymore.

Here are some troubleshooting ideas and suggestions,
– Ensure you have configured all the network settings we recommend in our network config manual. Ring buffer sizes, socket buffer sizes, jumbo packets, etc.
– Simplify your network to just SM200C directly connected to the PC. If stable, start adding additional equipment like your switch and determine when the issue starts.
– We recommend SFP+ for the full run. if you convert to RJ45 or SFP at any point, this is likely the source of your issue.
– Reduce the sample rate. You didn’t mention what sample rate you were using, but if it’s 200MS/s, try going down to 100/50/25. Any lower than 25 and the network rate doesn’t reduce, but it will perform on device decimation down to 25. This should put significantly less pressure on your network and hopefully contribute to a more stable system.
– If none of the above work, try swapping out fiber/transceivers to determine if there are any flaky ones. Definitely something we have seen in the past.

I look forward to your results.

• This reply was modified 1 year ago by Andrew.
• This reply was modified 1 year ago by Andrew.

We’re going to do a little bit of research on our end to see if we can learn more about how our device performs in a VM.

If it’s possible on your end, I would be curious if running on bare metal makes these issues go away. Running bare metal may not be an option for you, but I think there is value in knowing if the VM configuration is the problem, or if there is still something else limiting the data rates.