VideoEase MonoPro XLR Application Guide
© MuxLab Inc. 2005-2006
4
Digital Audio to Mixer via Rate Converter and D/A
The following setup tested the balun in professional digital audio mode. Note that part of the
UTP cable was winded around a running 60 Hz AC motor to simulate an AC noise source
superposed on the signal. Quantitatively, the maximum distance varied according to the
sampling rate of the rate converter.
Terminating the Cat5 Cable Inside the MonoPro XLR
The following photos show a close-up of the internal wiring connection of the MonoPro XLR.
When is the Ground Terminal Needed
Since the audio signal is transmitted as a balanced signal via twisted pair, the ground terminal is
normally not needed. However, if the MonoPro XLR is used in an application that requires
48VDC phantom power (48VDC), then the ground terminal is needed since phantom power is
transmitted with reference to ground. In regard to safety, this is not an issue since phantom
power is well protected against erroneous connections.
