Similarly there is a slot in the back of each
Next, the 15 meter shielded cable should be located and plugged into the
Next, the audio in/out connections should be made. The connectors for this are standard XLR type
The XLR connectors are wired with pin 1 as ground and pins 2 and 3 as an electronically balanced pair. Phase continuity is preserved with the same pin numbers used for input and output. In an installation where the source and/or load are unbalanced, avoid ground loops by using
It is normal practice to connect program (audio) ground to power line ground for many reasons, including safety. On occasion (particularly with long signal lines or incorrect wiring of the cable shields) induced hum can sometimes be reduced by separating the two grounds. A link behind the front panel of the control unit provides this feature. There is always a 1 k ohm resistor across the link so that the audio ground is never totally isolated from the chassis ground.
Verify that all connectors are securely mated and read the safety information on page
Power up the unit. The LEDs on the front of the control unit should indicate that channels 1 to 3 are present and that there are no errors. Errors are channels which have no remote addressed to them or remotes with no channels to control. As shipped, the frame with a pair of modules installed will have the addresses set to channels 1 & 2 and the frame with a single module will have its module address set to channel 3. (If errors are found at this stage, see Channel Number Assignment in Section 3.3.)
The unit powers up with processing off. To verify which remote unit controls which channel, the button on the bottom of the remote unit should be pressed to see which channel responds by changing the state of its front panel LEDs. An audio signal should be applied to each channel in turn and the effect of moving the various controls verified.