D.W. Fearn VT-12, Руководство по эксплуатации, Страница: 18 / 37

D.W. FEARN
VT-12 Microphone Preamplifer
21
Input and Output Connections
See Figure 1. Gold-plated XLR connectors are used for inputs and outputs. The input connec-
tors are female and the outputs male.
All connectors are wired according to AES standard: pin 1 is ground (shield), pin 2 is “high”
or “+,” and pin 3 is “low” or “-.” A positive voltage on pin 2 of the input will result in a posi-
tive voltage on pin 2 of the output (with the Phase Reverse switch set to Normal).
Grounding and Shields
A full discussion of proper studio wiring schemes is beyond the scope of this manual, but, in
general, the Input mating XLR connector must have the cable shield connected to pin 1. With
most microphones, this shield must also be connected to pin 1 at the microphone end of the
cable.
Whether the shield is connected to pin 1 of the output connector depends on the standard
in your studio. The shield should be connected to ground at only one end of the output cable;
however, although not recommended, the shields can often be connected at both ends with-
out a problem.