Studio Technologies 76 V.1.10 - Manual (Page 13)

Model 76/77 User Guide Issue 7, August 2012
Studio Technologies, Inc. Page 13
for Surround
four Model 77 Control Consoles. A 9-pin
D-sub connector, labeled To/From Central
Controller, is provided on the back panel
of each Model 77 Control Console. A cable
with 9-pin male D-sub connectors on each
end is used to interconnect each Model 77
with the Model 76. A 20-foot (6.1-meter)
cable is included in the main shipping
carton as well as each “solo” Model 77.
These cables implement all nine connector
pins in a one-to-one manner.
When connecting one or two Model 77
units to a Model 76 all nine pins of the
interconnecting cables can be connected
in parallel (“multed”). This will connect the
data signals between the units and route
the Model 76’s 12 volt DC power source to
both Model 77 units. A basic cable imple-
mentation would have pin 1 (data+), pin 6
(data–), pin 4 (DC+), and pin 9 (DC–)
connected. Connecting to a third and
fourth Model 77 requires that only pin 1
(data+) and pin 6 (data–) be connected
from the Model 76 to the third and fourth
Model 77 units. (This will connect the “data
bus” from the Model 76 to all the Model
77 Control Consoles.) An external 12 volt
DC source must provide power to the third
and fourth Model 77. This power source,
capable of supplying a minimum of 200
milliamperes of current (100 milliamperes
per Model 77), needs to connect to pin 4
(DC+) and pin 9 (DC–) on the third and
fourth unit.
Previous paragraphs of this user guide
discussed the Model 76 to Model 77 cable
length issues. Please review that informa-
tion prior to creating the interconnection
scheme to be used for installing multiple
Model 77 units.
Configuration
After the physical installation has been
completed it’s important that the system’s
configuration options be carefully reviewed.
In most cases one or more of the operating
parameters will need to be revised to meet
the needs of a specific installation. Many
of the parameters will impact the signal
flow in to and out of the Model 76 Central
Controller. Other parameters affect how the
one or more Model 77 Control Consoles
will display status conditions and respond
to user commands.
Configurable Parameters
Many StudioComm functions can be
configured to meet the exact needs of an
installation. The Model 77 Control Console
is used to display and select the desired
system configuration. Here’s an overview
of what can be configured:
• Model 77 Device Address
• Channel Mute/Solo Function
• Stereo Output
• Digital Input Reference Level
• Monitor Output Nominal Level
• Reference Level
• Overall Display Mode
• Reference Level in dB SPL
• Auto Reference Level Off
• Dim Level
• Remote Inputs
• LFE Downmix
• Channel Pop Solo Mode Offset Levels