Protech Audio 2000-600 SERIES Mixer/Line Amp. Card - Manual (Page 2)

INSTALLATION
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The 2000-600 Series Audio Mixer/Preamplifiers are
designed to be mounted in the Model 2000-CH
Card Frame .
The actual steps necessary for installation of the Model
2000-600 Mixer/Line Amplifier cards, are comparable to
those necessary for any of the 600 series cards. They
are as follows;
1- Mount the card frame in an appropriate EIA 19" width
rack, using 4 screws of sufficient strength
to provide secure mounting.
2- Select the card slot to be used for the distribution
amplifier card. Slots 1 to 8, starting with slot 1 on the left
side of the card frame, as viewed from the front of the card
frame, will accept any of the four models of distribution
amplifier card.
3- Terminate all audio input and output connections,
using the card connection drawing on the facing page.
Double conductor shielded cable is recommended for
all audio connections.
4- Unpack each individual card, inspect for shipping
damage, and assuming none is found, slide the
card half-way into the appropriate slot. After all cards
have been installed half-way into the card frame, plug in
one card at a time and turn on the power supply. Make sure
no unusual loading is indicated at the power supply . If
loading is noticed, turn off the power supply, unplug the
card and recheck terminations. If no loading is noticed,
continue inserting each card in the card frame, checking
power supply loading as each card is plugged in. When all
the cards have been plugged in, the installation is
complete, and all that remains is the alignment.
ALIGNMENT
Each 2000-600 Series Mixer/Line Amplifier card has
been shipped from the factory aligned for unity gain. This
alignment optimizes headroom. If additional gain is
required in the mixer/Line Amplifiers, the following
alignment procedure is recommended;
1 - Remove the Mixer/Line Amplifier from the card slot, plug
in the Model 516 Extender Card, and plug the card into the
extender card connector.
2 - Apply a signal representative of the actual signal level to
be used, to the #1 input.
3 - While monitoring the output channel, turn the input gain
trimpot clockwise, until the output signal reaches the
desired level.
4 - Repeat step #3 for each input on your Mixer/Line
Amplifier
This completes the installation and alignment of your 2000-
600 Series Mixer/Line Amplifier. The mixer may be
expected to deliver years of uninterrupted service.
Note #1 -
The alignment procedure outlined above will almost always
provide the desired output level. However, when an unusu-
ally low input signal level is present, the installer may wish
to use the additional gain available in the output gain stage.
Note #2 -
The alignment procedures for 2000-600 Series Cards,
differ from card type to card type. Therefore it is
necessary to consult the alignment procedure for each
type of card being installed, to properly align a card
frame using different card types.