Protech Audio 2000-600 SERIES Distribution Amp. Card - Manual (Page 2)

INSTALLATION
The 2000-600 Series Audio Distribution Amplifiers are
designed to be mounted in the Model 2000-CH Card
Frame.
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Each 2000-600 Series card has been shipped from the
factory aligned for unity gain. If additonal gain is required in
the distribution amplifiers, the following alignment porcedure
is recommended;
1- Remove the distribution amplifier from the card slot,
plug in the Model 516 Extender Card, and plug the distri-
bution amplifier into the extender card connector.
2- Apply a signal representative of the actual signal level
to be used, to the input.
3- While monitoring the #1 output channel, turn the output
#1 gain trimpot clockwise until the output signal reached
the desired level.
4- Repeat step #3 for each output on your distribution
amplifier, For any unused output, leave the gain trimpot in
the maximum counterclockwise position.
This completes the installation and alignment of your
2000-600 Series Audio Distribution Amplifiers. The card
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 (less than -20dB), the
installer may wish to use the additional gain available in the
input gain stage. This gain should be used only when each
output has already been adjusted to the maximum gain
setting. Using this gain in systems which do not require in
excess of 20dB, will result in reduced headroom.
Note 2-
The alignment procedures for 2000-600 Series cards, differ
from card type ot 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.
ALIGNMENT
The actual steps necessary for installation of the Model
2000-600 Distribution 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.