Quartet powers on/off when connected to a powered USB Hub or laptop

Symptom: If Quartet is connected to a powered USB device such as a USB Hub but not connected to a host Computer, the unit will briefly power on, search for a Computer, then power off if no Computer is found. Similarly, if Quartet is connected to a powered down or sleeping computer, the same occurs.   Note: This is the expected behavior for when Quartet is unable to successfully establish a link with a host computer.