Studio Technologies 76DA V.3.01 - Manual (Page 16)

Issue 2, April 2011 Model 76DA/77 User Guide
Page 16 Studio Technologies, Inc.
for Surround
As soon as mains power is applied the
Model 76DA will perform a power-up
sequence. The two LEDs on the right side
of the front panel will individually light in
a rapid right-to-left test sequence. Then
the LEDs will flash in cadence while the
firmware loads into the Model 76DA’s main
logic device. After just a few seconds initial
system operation will commence and the
two LEDs will perform their intended func-
tions. Once operating data is being inter-
changed with the one or more connected
Model 77 or Model 71 Control Consoles
the control console status LED will also
light. The sync status LED will light if a
valid sync source has been recognized.
The sync status LED will flash if a valid
sync source is not recognized.
Also upon application of mains power, all
connected Model 77 units will go through
a power-up sequence, lighting each of its
LEDs in succession. Using its 4-digit dis-
play, each Model 77 will then momentarily
display its address, its software version,
and the main and logic device software
versions of the associated Model 76DA.
All connected Model 71 units will also go
through a power-up sequence after mains
power is applied to the Model 76DA. Each
of the Model 71’s three LEDs will light
momentarily. After these LEDs have been
lit, the device address will be shown briefly
using the dim and reference level LEDs, as
shown in Figure 8 in the Operation section.
When this is complete the Model 71 will
begin normal operation and its status LED
will light if communication is established
with the Model 76DA. If the Model 71’s
status LED does not light check to see if
there is a device address conflict among
all connected control consoles and that all
cables are connected properly.
Should an error be detected during the
start-up process the two LEDs on the
Model 76DA’s front panel will continue
to flash in cadence indefinitely. On the
Model 77 units a diagnostic code may
be displayed. Refer to the Technical Notes
section of this user guide for details.
Only after the Model 76DA and all con-
nected Model 77 and Model 71 units have
correctly powered up will full system opera-
tion begin. It’s possible that audio signals
will first be present on the digital monitor
outputs. The analog monitor outputs will
only become active after a protection inter-
val has elapsed. These outputs are muted
using electro-mechanical relays that oper-
ate under software control.
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 the specific installation. Many
of the configuration parameters will impact
the signal flow in to and out of the Model
76DA Central Controller. Other parameters
affect how the one or more Model 77 Con-
trol Consoles will display status conditions
and respond to user commands. Most of
the configuration choices will be made us-
ing a Model 77 Control Console. However,
one configuration choice is available for
each of the connected Model 71 Control
Consoles.
Configurable Parameters
Many StudioComm functions can be con-
figured to meet the exact needs of an
installation. A Model 77 Control Console
is used to display and select the desired