Studio Technologies 76 V.1.10 - Manual (Page 14)

Issue 7, August 2012 Model 76/77 User Guide
Page 14 Studio Technologies, Inc.
for Surround
The configuration diagrams, located at the
end of this section, give details on setting
each parameter. An overview of each con-
figurable parameter is provided in the fol-
lowing paragraphs.
Entering and Exiting the
Configuration Mode
A small button is located on the back of
each Model 77 Control Console, adjacent
to the 9-pin D-sub connector. Pressing and
holding this button for two seconds places
both the Model 76 and all the connected
Model 77 units into the configuration mode.
The Model 76 will immediately mute the
analog outputs as a protection measure.
In the configuration mode the Model 77’s ar-
ray of buttons and LEDs no longer perform
their normal functions, instead allowing you
to observe and change many of the operat-
ing parameters. The mute and solo LEDs,
associated with the channel mute/solo
mode section, will light alternately to indi-
cate that the configuration mode is active.
To leave the configuration mode and return
the Model 77 units to normal operation once
again press and hold the configure button
for two seconds. Note that configuration
changes are stored in nonvolatile memory
only after the configuration mode has been
exited.
Our apologies to those of you who find
the configure button a pain to use, but it’s
supposed to be that way! Seriously, the top
of the button is slightly recessed from the
back panel, making it harder to accidentally
activate. We didn’t want normal operation to
cease because someone pushed the Model
77 into a “rats nest” of schedules, maga-
zines, or burrito wrappers! But a firm press
with the fleshy part of an index finger should
do the trick.
There is no problem frequently “tweak-
ing” the system’s operating parameters
to achieve the desired performance. The
configuration data is stored in nonvola-
tile memory, which is rated for thousands
of read and write cycles and a retention
time in tens of years. Note that memory
integrated circuits are located in both the
Model 76 Central Controller and the Model
77 Control Consoles. Only the individual
device address is stored in each Model
77. All other configuration parameters are
stored in the Model 76.
Model 77 Device Address
A unique device address must be assigned
to each Model 77 that is connected to a
Model 76. The choices are A1, A2, A3, or
A4, with the default address being A1. As
most installations will find only one Model
77 utilized, its default setting is appropri-
ate. For installations that use a second,
third, or fourth Model 77 each unit must be
configured with a unique device address.
Problems will occur if more than one unit
has the same address! It’s important to
highlight the fact that the device address is
the only setting that must be done on each
individual Model 77 unit. All other settings
can be made on any one of the connected
Model 77 units.
Channel Mute/Solo Function
The action of the channel mute/solo func-
tion can be configured. The default selec-
tion is for the mute/solo action to take
place post (after) the downmix functions.
Alternately, the function can be selected
such that mute or solo activity will be pre
(before) the downmix functions.