Specifications

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12
Broadcast Tools
®
ACS 8.2 Plus Eight Input, Dual Output StereoMatrix Audio Control Switcher
INSTALLATION
INSTALLATION GUIDELINES
Mounting:
The ACS 8.2 Plus is designed to be rack mounted in a standard 19” rack. It should
be mounted in an area that is accessible from the rear and preferably away from
sources of heat. We recommend before permanently installing the ACS 8.2 plus,
you bench test and become familiar with the operation of the unit.
Power Supply Connection:
Install the 5-pin DIN power connector into the power receptacle on the ACS 8.2
Plus. When ready, plug the power supply into the appropriate AC receptacle.
Connecting the Audio Inputs, Outputs, Status Inputs and OC/Relays:
The input channels are numbered from 1 through 8 on the rear panel from left to
right. The ACS 8.2 Plus interfaces to your audio equipment through plug-in
euroblock screw terminals. Follow the legends for the desired audio input and out-
put connections, which appear on the rear side of the printed circuit board and also
on the layout drawing on the last page of this manual. Remove each screw termi-
nal, strip each conductor, insert the conductor into the terminal and screw down the
capture screw. The terminals accommodate wire sizes from 16 - 28 AWG solid or
stranded wire. Connections may be made to the + and - inputs for balanced opera-
tion, or to the + input and grounding the - side for unbalanced input operation.
Connections can be made to the + and - outputs for balanced operation, or to the +
output and ground for unbalanced output operation.
It is recommended that all cables connected to the ACS 8.2 Plus be looped through
ferrite cores to suppress RF. Surge protection with RF filtering is also suggested for
the power transformer. The purchase of an inexpensive uninterruptible power sup-
ply (UPS) will provide back up in case of power outages.
Adjusting Input and Output Levels:
Calibrating audio levels on the switcher and VU meters:
1 - Remove power from the unit.
2 - Remove the cover.
3 - Feed a reference signal into the selected input channel.
4 - Connect a Hi Z dB meter to the TEST jack TB9
5 - Reapply power.
6 - Adjust the left and right input to a zero level on your dB meter.
7 - Adjust the VU trimmers R126 (left) and R133 (right) for zero VU.
8 - Now the output trimmers may be used to set the desired output levels.
NOTE: The rest of the inputs may be adjusted.
CAUTION!
In no case should
either the + or - out-
puts be connected to
ground.
The input impedance
is 20K
Ω , 600 Ω termi-
nation may be installed
on the connector.
CAUTION!
Installation of the ACS
8.2 in high RF environ-
ments should be per-
formed with care.
Shielded cable is sug-
gested for all control,
audio inputs and out-
puts. All shields should
be tied to the “CH
GND” terminal on
each channel. The sta-
tion ground should be
connected to the chas-
sis ground screw (CH1)
located behind J1 as
viewed from the rear.
For lightning protec-
tion devices, check out
www.polyphaser.com
and www.itwlinx.com.