Studio Technologies 76B 2012 - Manual (Page 18)

Issue 3, August 2012 Model 76B/77B User Guide
Page 18 Studio Technologies, Inc.
for Surround
2. Place the StudioComm system in the
normal operating mode, not the con-
figuration mode. Be certain that the
dim, mute all, reference level, dialnorm
enable, and downmix functions are not
active. The remote mute all or remote
dim functions must not be active.
3. Use the Model 77B Control Console
to select the input source that contains
the desired reference signal source,
e.g., pink noise.
4. Observing the SPL meter, adjust the
Model 77B’s rotary level control until
the desired reference monitor system
level has been reached.
5. Being careful not to disturb the posi-
tion of the rotary level control, enter the
configuration mode by pressing and
holding the configuration button locat-
ed on the Model 77B’s back panel.
6. Once the configuration mode has been
entered, the monitor outputs will mute.
Press and hold the reference level
button; its associated LED will begin
to flash. After five seconds the LED
will light steadily to indicate that a
“snapshot” of the new reference level
has been taken. The Model 77B’s nu-
meric display will then show the value
of the new reference level. The value
shown will always be a negative num-
ber 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 configura-
tion mode must be exited. This is per-
formed by again pressing and holding
the configure button for two seconds.
The new reference level is now stored
in the Model 76B’s nonvolatile memory.
Only by repeating the entire procedure
can the value be changed.
Once the configuration mode has been
exited, the monitor outputs will again be-
come active. Confirm 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
five seconds before the selected value is
recognized. This is provided specifically
so that unauthorized users won’t acciden-
tally change the reference level while they
experiment with the configuration mode.
Only if you know the “secret” will you be
able to store a new value.
Overall Display Mode
The Model 77B’s 4-digit numeric display
can be configured 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
relative 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
counterclockwise direction the display will
show negative values, reaching approxi-
mately –69.5 dB before the full mute func-
tion automatically mutes the outputs.
In the SPL mode the display can be
configured to allow the output level to be
presented to users in terms of the actual
sound pressure level (SPL). Used in con-
junction with the reference level in dB SPL
configuration and the stored reference level,
SPL mode allows a user to see a visual rep-
resentation 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 enhanced
experience for StudioComm users.