Quansheng Stretch ?..
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The easiest is using the NucleoTNC as a TNC for M17 packet mode. You would need 2 or more devices that speak M17 packet mode. However, packet?mode right now is hit or miss with this radio. I am trying to work through an issue with the?radio. RX shows some odd artifacts where the DC bias jumps significantly as soon as a signal is present. (Likely not an audio amp problem as I originally thought.) This happens when the radio has been in RX mode for a while. The issue seems to occur in both Wide and Narrow mode, but to a lesser extent in narrow mode. The image below shows the issue. The polarity of the drift and then sudden adjustment after ~120ms can switch (can drift up or down), and?it can be much more severe. The image below is in wide mode. In narrow mode, it is less noticeable, but still enough to cause the first few frames to get corrupted. This is not much of an issue with M17 voice, since we can recover after a few frames. That's not possible with packet mode. All of the frames must be received correctly. TX or changing the RX frequency resets it and it works well for a bit, then starts to show the behavior again. So there is likely a way to fix this or work around the issue. We just don't have good docs for the chip. If anyone wants to explore this issue, I'd be happy to point out where to start poking at the firmware. The hardware mod is pretty easy if you can do surface mount work. And the firmware is easy to modify, build and load. Kind Regards, Rob Riggs WX9O Mobilinkd LLC On Mon, Aug 19, 2024 at 6:48?PM Robert Alford via <Mw1coe=[email protected]> wrote:
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