OPTIMOD-PC
INSTALLATION
2-35
mod-PC Input and Output mixers from such applications. These controls are avail-
able to such applications regardless of whether their check-boxes are checked in the
S
HOW THE
F
OLLOWING
V
OLUME
C
ONTROLS
window.
Input Setup Procedure
1.
Adjust the Analog Input Reference Level control.
[If you will not be using OPTIMOD-PC’s analog input, continue with step 6 on
page 2-38.]
A)
In the I/O Mixer, click the
C
ONFIGURATION
tab (see Figure 2-5 on page 2-22).
B)
Set the
A
NALOG
I
NPUT
R
EFERENCE
L
EVEL
to
+4
DBU
or
–10
DBV
depending on
whether you are driving the OPTIMOD-PC’s analog input with professional or
consumer equipment, respectively.
If the
A
NALOG
I
NPUT
R
EFERENCE
L
EVEL
is set to
–
10
DBV
and the level meter on
the
A
NALOG
L/R
I
NPUT
control hits full scale when you apply normal program
material to the analog input, reset the
A
NALOG
I
NPUT
R
EFERENCE
L
EVEL
to
+
4
DBU
.
A
NALOG
L/R
I
NPUT
controls are found on the P
ROCESSOR
M
IXER
and D
IRECT
M
IXER
pages.
Using +4dBu as the reference level, the system is calibrated correctly
when the I
NPUT
L
EVEL
C
ONTROL
adjusted to 0dB (maximum). This will pro-
duce –20dBfs at the WAVE output for recording/encoding applications.
The input stage has 20dB of headroom prior to the Input Level Control.
Hence, a +4dBu tone at the analog input indicates –20dB on the analog
input level meter. If the level meter hits full-scale when the A
NALOG
I
NPUT
R
EFERENCE
L
EVEL
is set to
+4
DBU
, you are exceeding a peak level of ap-
proxi24dBu at OPTIMOD-PC’s analog input and you must reduce
the output level of the device driving OPTIMOD-PC.
2.
Adjust the Analog Output Level control.
If you are using the Processing w/Limiting Output:
An analog output level
fader setting of –12dB produces approxi4dBu at the output with normal
arbitrary processed audio.
When the analog output is set to receive P
ROCESSOR
M
IXER
P
OST
L
IMIT
, a
–20dBfs 1kHz sinewave tone produces –18dB at the Analog Output Meter
and +2dB on an external meter with VU ballistics calibrated so that 0 VU
= +4 dBu and connected to OPTIMOD-PC’s analog output. This assumes
that:
•
The Active Preset is Rock Medium.
•
The
L
IMITING
control in the preset is set to 0.0dB.
The OPTIMOD-PC digital and WAVE output meters indicate –6 dBfs when
their respective O
UTPUT
L
EVEL
controls are set to 0 dB (maximum).
If you are using a Direct Mixer Output:
Normally, a Direct Mixer Output is
used when you want a given sound device in OPTIMOD-PC to behave as a simple
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