Does the SignaLink require a power supply?
Yes, the SignaLink is not “passive” like less capable interfaces. It contains digital CMOS circuitry that does require some power. However, the SignaLink consumes so little current that it can almost always be powered from the Accessory Voltage found on the Mic connector of most radios. If your particular radio does not have that voltage available, then you can simply power the SignaLink using the auxiliary power jack on the back panel. See the SignaLink manual for additional details.
