Ground Link Terminals
As shown in the diagram on the inside, rear cover of this manual, there are two ground terminals
on the rear of the mixer, an Audio ground and a Chassis ground. There is a link jumper
connecting these two grounds together. This is the normal configuration.
The power supply for the mixer has a 3 prong, grounded, AC power plug. The ground prong on
AC power plug should never be “lifted” or isolated from ground. Should the mixer need to be
isolated from ground, the ground link can be removed. Normally, the Audio ground terminal is
then “referenced” (connected) to another ground point somewhere in the system.
If there are multiple mixers or other Audio Net™ products in the system, a “Star ground” should
be used. A star ground will help reduce overall system noise and will also help reduce ground
loops. An example of star grounding is shown on the inside, rear cover of this manual.
DC Pwr In
Connect the supplied UL®, CSA® approved power supply to this connector. The power supply
provides
±
15Vdc and +5Vdc to the mixer.
Setting Up the Mixer
The 802A is very easy to install and set up. There are no gain trim or threshold controls to be set.
The automatic mixer portion of the mixer is set by adjusting the channel level controls as would be
done for normal mixer operation. The following procedure should be used:
1. Set up each input for the configuration needed: Mic or line level, phantom power, pad in/out
etc.
2. Set all unused inputs to
-
∞
(fully counter-clockwise).
3. Set all of the microphone channels that are being used to the +5 position on the front panel.
This is for a normal dynamic microphone (14dB pad off), or for a condenser microphone (14dB
pad on). When using microphones of the same type, the input level controls should be set to
approximately the same level. If different types of microphones are used, lower sensitivity mics
may need to have their gain increased, while higher sensitivity mics may need to have their gain
decreased.
4. With the LAST ON feature activated (set to on), speak into a microphone and adjust the Master
Output level so that it is just below the level of feedback.
5. One at a time, speak into all the other microphones and adjust their individual input controls to
the desired level.
6. Adjust Aux inputs as desired.
