Dolby Laboratories 737 - Manual (Page 17)

Model 737 Soundtrack Loudness Meter - Leq(m) Operation and Features
2-10
2.6 Block diagram
Figure 2-6 Model 737 block diagram
The six input channels each have a balanced to unbalanced stage buffering the input sig-
nal. Trimpots on the front panel set each channel’s input level. The unbalanced signals
then pass to the metering CCIR filters and make-up gain stages. The signals on the
“wipers” of the selector switch, controlled by the Mon trimpot, are buffered and sent to
Mon Out on the rear panel.
CCIR
Filter
Rectifier
X 2
in +
in -
in +
in -
in +
in -
in +
in -
in +
in +
in -
in -
L / Lt
C
Ls
R / Rt
Sub
Rs
Monitor Out
Hold
Cal
Run
Start
Average
Trip Level
7
3
Trip point out
DC out
(fine level)
Rectifier and
LED Driver
Remote
Start/Stop
CCIR
Filter
CCIR
Filter
CCIR
Filter
CCIR
Filter
Lt
Average
Logic
Display
Driver
Square
Root
A/D
Hex
Switch
Rectifier
Rectifier
Rectifier
Rectifier
X 2
X 2
X 2
X 2
+
-
+
-
+
-
+
-
+
-
MAIN