Studio Technologies 76DA V.4.02 - Manual (Page 25)

Model 76DA/77 User Guide Issue 4, March 2013
Studio Technologies, Inc. Page 25
for Surround
Post-Fader Digital and Analog
Monitor Output Level Offsets
To provide assistance during room cali-
bration, the relative output levels of the
post-fader surround and stereo digital and
analog monitor output channels can be ad-
justed over a limited range. The eight chan-
nels can be adjusted in 0.5-dB steps over
a ±12-dB range. During configuration the
displayed value represents the dB level dif-
ference as compared to the nominal output
level. In most cases one surround and one
stereo channel should serve as the overall
reference level and not be changed. This
is typically the center channel for surround
and the left channel for stereo. The con-
figured output level offset values apply to
both the digital and analog surround stereo
monitor outputs. It is not possible to config-
ure a specific channel’s digital and analog
monitor output level offsets to independent
values.
This feature is provided primarily for use
when the post-fader monitor output chan-
nels are connected to loudspeaker sys-
tems that don’t offer a means of “trimming”
the input sensitivity of individual channels.
Without this capability, minor adjustments
to the output level of specific loudspeakers
to account for room acoustics wouldn’t be
possible.
It’s also possible to use the StudioComm’s
output level offset capability to adjust the
overall post-fader monitor output levels to
allow matching to the input sensitivity of
loudspeaker systems. In this case all the
channels (six for surround, two for stereo)
would be configured to have the same
output level offset setting. For example, the
six surround channels could all be config-
ured to have a –3.5 dB output level offset.
However, great care must be taken when
configuring a system in this manner. The
dynamic range or noise floor of the audio
signals will be impacted and extreme set-
tings could lead to poor monitor system
performance.
Restore Factory Defaults
The restore factory defaults function is pro-
vided primarily for factory use. In this way
a system can be shipped with the default
settings selected. While you are welcome
to use this function, be careful so that your
configuration efforts aren’t wasted. Spe-
cifically, be aware that the reference level
is reset to minimum level. All the other
parameters are fairly easy to set up, but
resetting the reference level would require
getting out an SPL meter and a calibrated
signal source. This is a hassle you may not
need!
Model 71 Control Console
Configuration
The only configuration choice available
on a Model 71 is its device address. It
must be selected so as not to conflict with
the device address of any other connected
Model 71 or Model 77 Control Console.
The choices are A1, A2, A3, and A4.
All Model 71 units have a default device
address of A4; Model 77’s units have a
default device address of A1. This ensures
that, in most cases, no change will have
to be made. Refer to Figures 8 and 9 for
details.
A small button is located on the back of
each Model 71 Control Console, adjacent
to the 9-pin D-sub connector. Pressing and
holding this button for two seconds places
this specific unit in its configuration mode;
normal operation of the Model 76DA and
other connected Model 71 and Model 77