Protech Audio 901 - Manual (Page 2)

INSTALLATION
The Model 901 Modular Matrix Mixing Card is designed
to be mounted in the Model 857B Card Frame, or the Model
858B Card Frame. The Model 857B Card Frame will accomodate
up to 10 audio cards, and requires an external power supply
(Model 66708). The Model 858B Card Frame will accomodate
up to 9 audio cards (depending upon AC current requirements),
and has a built-in, unpluggable power supply card.
All card frame assemblies bus the DC power to the individual
card slots, and provide screw-type barrier termination points for
audio and DC connections.
The determination as to which backplane assembly to use in
your project, was made prior to our factory receiving the
order. The backplane assembly you have received will
accommodate the group of cards you or your designer have
specified.
The actual steps necessary for installation of the
INTEGRA III SYSTEM Modular Matrix Mixing Cards, are
comparable to those necessary for any of the system cards.
They are as follows:
1 - Mount the card frame in an appropriate EIA 19" width
rack, using 4 screws of sufficient tensile strength to provide
secure mounting.
2 - A determination has been made as to which type of power
supply will be used on your system. Follow the instructions
for the type of power supply you will be installing.
EXTERNAL POWER SUPPLY. If an external power
supply is to be used, terminate the proper supply
connections to pins 1, 2, & 3 of the 3 pin barrier connector, as
shown in the card frame layout drawing. Turn on the power
supply, and using a DC voltmeter, check for correct voltage and
polarity at pins 1, 2, & 3 of the 3 pin barrier connector.
INTERNAL POWER SUPPLY. If a plug-in power supply
card is to be used, plug in the supply card, , and check for
proper illumination of both DC voltage green LED's.
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 noticed at the power supply. If loading is noticed,
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.
Page 2
Each Model 901 Modular Matrix Mixing Card with has been
shipped from the factory aligned for unity gain on both the
background music and paging channels. The public page func-
tion on the card is active as shipped from the factory. If the
public page is not to be allowed in the zone being set-up,
remove the red push-on jumper located on the lower pc board
assembly. If gain adjustment is required, the following
procedure is recommended:
ALIGNMENT
This completes the installation and alignment of your
INTEGRA III SYSTEM Modular Matrix Mixing. The cards
may be expected to deliver year of uninterrupted service.
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Remove the Model 901 card from the card slot, and
place a Model 516 extender card in the slot.
Select the background music input to be used by
turning on one of the DIP switch channels on the top
PC board assembly.
Place the Model 901 into the mating connector on
the model 516 extender card.
Apply background music to the selected channel, and
adjust output level by turning trimpot mounted on the
top pc board assembly.
Actuate any on the 3 paging channel input relays,
apply a signal representative of the page input level
to the selected channel, and adjust the output level
by turning the trimpot mounted on the lower (main)
pc board assembly.
Remove the Model 901 from the Model 516 Extender
card, remove the extender card from the card slot, and
place the Model 9001 into the card slot, making sure it is
seated properly.