connected. The source for these signals will typically be ports on a matrix intercom system. It’s also possible that the signals will come from other devices, such as a fiber optic or
Audio sources are connected to the line inputs by way of
Prepare the mating connectors (males) so that pin 2 is signal high (+ or hot), pin 3 is low (– or cold), and pin 1 is shield. If connecting a source in this manner results in hum or noise it’s possible that remov- ing the shield connection from pin 1 can eliminate the issue; “floating” pin 1 will
remove a potential ground current path from the Model 46’s earth/chassis ground point through the shield of a cable. Also, if a hum or noise issue does arise be certain to confirm that, unless absolutely neces- sary, the mating connector’s “shell” isn’t connected to the cables’ shield or pin 1. Termination of this “fourth” pin of a
With an unbalanced source connect pin 2 to signal high (+ or hot) and both pins 1 and 3 to shield. If connecting an unbalanced source in this manner results in hum or noise, connect pin 2 to high (+ or hot) and pin 3 to shield; leave pin 1 unterminated.
4-Wire Line Outputs
Each of the Model 46’s two interfaces provides two analog
Figure 1. Detail of back panel showing line inputs and outputs
Model 46 User Guide | Issue 2, September 2007 |
Studio Technologies, Inc. | Page 11 |