Studio Technologies 76 V.1.04 - Manual (Page 16)

Issue 4, September 2008 Model 76/77 User Guide
Page 16 Studio Technologies, Inc.
for Surround
5. Being careful not to disturb the posi-
tion of the rotary level control, enter
the confi guration mode by pressing
and holding the confi guration button
located on the Model 77’s back panel.
6. Once the confi guration mode has been
entered, the monitor outputs will mute.
Press and hold the reference button;
its associated LED will begin to fl ash.
After fi ve seconds the LED will light
steadily to indicate that a “snapshot”
of the new reference level has been
taken. The Model 77’s numeric display
will then show the value of the new
reference level. The value shown will
always be a negative number as it’s
always a value less than the maximum
output level. The reference level button
can now be released.
7. To complete the process the confi gura-
tion mode must be exited. This is per-
formed by again pressing and holding
the confi gure button for two seconds.
The new reference level is now stored
in the Model 76’s nonvolatile memory.
Only by repeating the entire procedure
can the value be changed.
Once the confi guration mode has been
exited, the monitor outputs will again be-
come active. Confi rm that the correct level
has been stored by pressing the reference
level button. The SPL meter should display
the desired level. If not, repeat the calibra-
tion procedure to achieve the desired goal.
You might wonder why you have to press
and hold the reference level button for fi ve
seconds before the selected value is
recognized. This is provided specifi cally
so that unauthorized users won’t acciden-
tally change the reference level while they
experiment with the confi guration mode.
Only if you know the “secret” will you be
able to store a new value.
Overall Display Mode
The Model 77’s 4-digit numeric display can
be confi gured to display the output level
in either an attenuation mode or an SPL
mode. In the attenuation mode the output
level is shown as a reduction in value rela-
tive to the maximum output level. When the
rotary control is used to set the output level
to its maximum the display will show 0.0.
As the rotary control is moved in the coun-
terclockwise direction the display will show
negative values, reaching approximately
–69.5 dB before the full mute function au-
tomatically mutes the outputs.
In the SPL mode the display can be confi g-
ured to allow the output level to be present-
ed to users in terms of the actual sound
pressure level (SPL). Used in conjunction
with the reference level in dB SPL confi gu-
ration and the stored reference level, SPL
mode allows a user to see a visual repre-
sentation of the SPL level that is present
in the listening environment. While it takes
a little more care to correctly implement
the SPL display mode, it can offer an en-
hanced experience for StudioComm users.
Reference Level in dB SPL
The reference level in dB SPL confi gura-
tion allows a specifi c SPL value to be asso-
ciated with the stored reference level value.
In this way whenever the monitor output is
at the reference level, either through acti-
vating the reference level function or manu-
ally adjusting the rotary level control, the
Model 77’s display will show the confi gured
SPL level. Whenever the monitor output is