<div dir="ltr">Hello again to all, <div>I've interfaced a DMK URI to an RLC-4 Repeater controller. Everything works great, with the exception of the common "USB noise" (high-pitched whine, sounds like square wave) on both TX and RX audio from the URI. </div><div>Here's the troubleshooting I did so far, to no avail.</div><div><br></div><div>*double-checked my grounding between the URI and controller. ( RLC-4 radio port pin 1 -> URI pin 13) </div><div>*tried different USB cables between URI and BBB</div><div>*tried powering BBB with mini-USB cable attached to charger-less laptop instead of my +5V wallwart</div><div>*tried powering BBB with USB cigarette adapter plugged into controller's +12VDC supply</div><div>*tried removing ethernet cable </div><div><div><br> Any tips/ideas would be greatly appreciated. </div><div>Thanks!<br><br></div><div class="gmail_signature">KJ6QFS<br>Sam Skolfield</div>
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