https://devzone.nordicsemi.com/f/nordic-q-a/125075/why-the-10cm-limit-on-programming-cable-used-with-nrf54l15-dk-to-program-custom-boardHi, I was able to purchase a commercially available 30cm ribbon cable to connect from the nRF54L15 DK to a custom board for programming. I later realized the DK documentation specifies a maximum 10cm cable for this function. Why is this restrictionen-USTelligent Community 13Sun, 16 Nov 2025 10:15:01 GMThttps://devzone.nordicsemi.com/thread/554451?ContentTypeID=1Sun, 16 Nov 2025 10:15:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a954dae-0284-4a5a-beed-ac54a86854b7Turbo J<p>HF black magic weakens signals over longer cables. How long too long is depends on the signal itself.</p> <p>And you&nbsp;<em>want</em> the debug signals to run as fast (and thus as high) as possible.&nbsp;</p> <p>TL;DR Use a short debug cable.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/554446?ContentTypeID=1Sat, 15 Nov 2025 19:25:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:feabb10e-fe5b-4038-b7be-29fd3518a143Ken58<p>Hi PaKa,</p> <p>Can you explain that for someone without an electrical engineering background?</p> <p>Thanks,</p> <p>Ken</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/551907?ContentTypeID=1Mon, 20 Oct 2025 09:24:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0574b43d-3d62-43e9-9a89-b230845e91eePaKa<p>The drivers on the DK doesn&#39;t support driving the signal through longer cables, the impedance doesn&#39;t work out. You will probably see the programming fail if you use a too long cable.</p><div style="clear:both;"></div>