Studio Technologies 68 V.1 - Manual (Page 18)

Issue 2, June 1999 Model 68/69 User Guide
Page 18 Studio Technologies, Inc.
for Surround
example, when selecting input 2, our
mythical L/C/R source, all six monitor
output channels will remain active, but
the input routing circuitry won’t select the
LS, RS, and SUB inputs. While to some
people this might seem confusing and
possibly a design fault, it was implemented
this way because the StudioComm system
allows multiple inputs to be simultaneously
selected for monitoring; a surround source
might be selected at the same time as a
stereo source. Muting the outputs simply
would not do!
A special mode has been included to
allow an input to be disabled from being
accessed by the operator. This might be
useful, for example, when input 4 (Stereo
B) is not connected to a source, and has
no valid reason to be selected. This might
also be useful when connecting a special
source, such as a house “tie line” or router
output, that shouldn’t normally be acces-
sible. To disable an input is simple, just
disable all channels associated with it; six
for inputs 1 and 2, two for inputs 3 and 4.
To confirm that the input has been dis-
abled, all LEDs associated with that input
will flash on and off. Once the Model 69 is
returned to the normal operating mode,
the disabled input cannot be selected.
Monitor Output Channels Active
The Model 68 and Model 69 hardware and
software supports up to six monitor output
channels. The Model 69 is configured,
from the factory, to generate commands
to control all six monitor outputs. This
would be correct for most applications.
But there may be cases, for example,
where only a 4-channel system is desired.
By configuring the Model 69 to disable the
unused monitor output channels, operator
clarity is enhanced. Specifically, the moni-
tor output mute/solo buttons and LEDs for
the unused monitor output channels will be
disabled, along with the underlying func-
tionality. With the unused monitor output
channels disabled, an operator can’t
accidentally select those channels for solo
or mute operation.
Local L/R Bypass
A button on the Model 69 Control Console
allows the system to be changed from the
normal surround mode to the L/R Bypass
mode. The button could be considered to
allow “local” control of the L/R Bypass
function. In some installations, the L/R
Bypass input won’t be utilized, and locally
enabling the function would be meaning-
less, and possibly confusing to operators.
In other installations, remote control of the
L/R Bypass function will be implemented,
possibly eliminating the need for local
control. In these cases, it may be desirable
to use the configuration parameter to
disable local L/R Bypass operation. When
disabled, pressing the L/R Bypass button
on the Model 69 will result in no change
taking place; surround-mode operation
will be maintained.
Power-up Mute All
By default, upon application of AC mains
power the monitor outputs remain muted
until a power-up sequence has been
performed. Then the monitor outputs are
returned to their respective states as left
at the time of the previous loss of AC
mains power, allowing normal operation
to resume. There may be special uses
where having the monitor output channels
remain muted until an operator manually
presses the mute all button. Use the con-
figuration button to select the desired
power-up mute-all operation.