PTT control delay
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JH0PCF kanda
Dec 25, 2025, 6:29:25 AM12/25/25
to digitalvoice
Thank you for your continued support.
This is JH0PCF Kanda.
Thanks to you, the number of amateur radio stations operating FreeDV in Japan is increasing, as you can see by looking at FreeDVReporter. Approximately 20 stations now conduct roll call daily.
I am writing to you after receiving a report of a malfunction from one of these stations.
When operating on the same frequency with FreeDV Reporter displayed on the same screen, there are PTT delays and the station does not switch smoothly to receive. Hiding FreeDVReporter allows for a smooth switch.
When operating on the same frequency with a group of about 10 stations,
it appears that the CPU resources required are high due to processing such as SNR and other processes.
We have received reports that this phenomenon is particularly noticeable on low-spec CPUs when PTT switching is not smooth.
Even if you cannot solve this issue immediately, we would appreciate it if you could address it as a future issue.
For reference, the first image is a screenshot of the resource status.
The area with the most resources on the left is displayed on the same screen in FreeDVReporter.
The area with fewer resources on the right is hidden.
The next image shows the operational status. At this time, 18 stations are operating on the same frequency. Thank you for your cooperation.
This is JH0PCF Kanda.
Thanks to you, the number of amateur radio stations operating FreeDV in Japan is increasing, as you can see by looking at FreeDVReporter. Approximately 20 stations now conduct roll call daily.
I am writing to you after receiving a report of a malfunction from one of these stations.
When operating on the same frequency with FreeDV Reporter displayed on the same screen, there are PTT delays and the station does not switch smoothly to receive. Hiding FreeDVReporter allows for a smooth switch.
When operating on the same frequency with a group of about 10 stations,
it appears that the CPU resources required are high due to processing such as SNR and other processes.
We have received reports that this phenomenon is particularly noticeable on low-spec CPUs when PTT switching is not smooth.
Even if you cannot solve this issue immediately, we would appreciate it if you could address it as a future issue.
For reference, the first image is a screenshot of the resource status.
The area with the most resources on the left is displayed on the same screen in FreeDVReporter.
The area with fewer resources on the right is hidden.
The next image shows the operational status. At this time, 18 stations are operating on the same frequency. Thank you for your cooperation.
Message has been deleted
JH0PCF kanda
Jan 4, 2026, 8:41:23 AMJan 4
to digitalvoice
This is JH0PCF Kanda. Happy New Year!
I look forward to working with you again this year.
Everyone, I've got FreeDV running and I was able to take a video of the reception.
I've uploaded it to my Google Drive.
I'll share the link.
This seems like a bit of an anomaly, but do you know what it is?
The high Wi-Fi usage is due to downloading other programs. Thank you.
https://drive.google.com/file/d/1m-ZmRaBjhwE5IjMUj9BZBs5zzu0_9iC2/view?usp=sharing
I look forward to working with you again this year.
Everyone, I've got FreeDV running and I was able to take a video of the reception.
I've uploaded it to my Google Drive.
I'll share the link.
This seems like a bit of an anomaly, but do you know what it is?
The high Wi-Fi usage is due to downloading other programs. Thank you.
https://drive.google.com/file/d/1m-ZmRaBjhwE5IjMUj9BZBs5zzu0_9iC2/view?usp=sharing
2025年12月25日木曜日 20:29:25 UTC+9 JH0PCF kanda:
Mooneer Salem
Jan 5, 2026, 12:16:59 PMJan 5
to digita...@googlegroups.com
Hi Kanda,
Thank you for the video. The CPU usage does seem fairly high here. Would it be possible to get a recording showing the PTT button being pushed so I can fully understand the observed behavior?
Thanks,
-Mooneer K6AQ
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