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4.1 COMPELLOR Controls
The following controls are common to all COMPELLORs except where
noted.
4.1.1 METER SELECT Switches and Bargragh
The COMPELLOR has a unique multi-function, bi-color bargraph meter that
can be switched to monitor input and output levels of the program, as well
as show the amount of gain reduction, as shown in Fig. 4-4.
METER
SELECT
Fig. 4-4. Close-up of
COMPELLOR front panel
showing METER SELECT
and bargraph meter layout.
- INPUT or OUTPUT
METER
SELECT
_CZI_
INPUT
OU
Fig. 4-5. In the
PROGRAM mode, use
the lower scale to read
Peak and Average levels.
GAIN
RE
TION
r
i
siq
2
4
6
8
10
12
14
16
18
28
DVG
MIMI»
fab
IMP
41»
f»
EOM
LMT
•15
-12
-9
-6
3
o
.3
.9
. 12
In the PROGRAM mode, the last LED of the red bar indicates average level
(VU) and the last LED of the green bar above it shows peak level. Program
dynamics and density can be seen at a glance, as shown in Fig. 4-5. The left
METER SELECT Switch provides selection of either Input or Output Pro-
gram levels, whenever the right METER SELECT Switch is in the PROGRAM
mode. Use the lower scale (3 dB division per LED) to read the meter's
PROGRAM indicators.
_CL = PROGRAM
GAIN
REDUCTION
LAST RED = 0 VU AVERAGE
13180
8318>
469
MD
41M1
IRO
-15
PROGRAM Scale at
3 dB per LED
-12
-9
-6
- 3
0
.3
\+9
. 12
LAST GREEN LED
+6 VU PEAK
In the GAIN REDUCTION mode ( right METER SELECT Switch is pressed),
the meter shows the total amount of gain reduction as a green bar. A single
red dot indicates the amount of leveling. The green bar portion above the
red dot indicates the amount of compression. Use the upper scale (2 dB
division per LED) to read the meter's GAIN REDUCTION indicators. For
example, if 16 dB of total gain reduction is indicated and the red dot is at 10
dB, 6 dB of compression above 10 dB of leveling is indicated, as shown in
Fig. 4-6.
A white "DVG" LED (see Fig. 4-4), located at the left side of each meter,
flashes to show DVG action whenever the computer control circuits have
anticipated and prevented a "pumping" occurrence. A red "LMT" LED ( see
Fig. 4-4) located at the right side of each meter flashes whenever the limiter
is operating.
4-2 Front Panel Controls
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