Model 737 Soundtrack Loudness Meter - Leq(m) Cat. No. 448B Input Adapter Board
3-2
3.3 Component and Connector Layout
Figure 3-1 Cat. No. 448B Interface Adapter
3.4 Preview Theatre

3.4.1 Concept

The DA10 or DA20 feeds six Dolby Digital channels; the Cat. No. 150 supplies two.

Since the DA10/20 output is unbalanced, the positive tags should be used and the negative

tags grounded. To ensure that the auxiliary two-track input is used in matrix mode, the

MAT and OPT logic lines should be paralleled together and fed from the CP65 logic.

Additionally, the SR logic line should be permanently grounded to disable the 3 dB

attenuation on L, R of the six-track input to ensure sufficient gain.

3.4.2 Installation

Figure 3-2 Installation of Cat. No. 448B

1. Before mounting the Cat. No. 448B, ensure the jumpers LK1-4 are in the upper

(1&3) position.

2. Connect the Cat. No. 448B with the cinema processor using Table 3-2 and

adhere to the pin conventions in Table 3-3 and Table 3-4.

Lt Rt
GND
Lt Rt OPT MAT SR +15 -15 0V
CAT150TO DS4E
L+ L- C+ C- R+ R- Ls+ Ls- Rs+Rs - Sw+Sw-
FROM DA20 / MON BUSS
C+L+ L-
TO MODEL 737
Ls+R+C- R- Rs+Ls- Rs- Sw+ Sw-
R1 R2 R4 R5
R6 R7 R9 R1
0
R1
1
R1
2
R1
3
R1
4
R3
R8
FROMSIG
SW
2
J3
J2 J1
R22
SW
1
SW
4
SW
3IC1
R26
R20
R27
R25
R19
R24
R15
R17
R16
R18
R21
IC2
R23
D1
C3
C2C5
C4C1 RV2
RV1
LEFT
RIGHT
LK
1
LK
2
LK
3
LK
4
Lt, Rt
2 & 3
Lt, Rt
1 & 3
(LK1-4)
(LK1-4)
CAT. NO. 448B
R28
R29
INTERFACE ADAPTOR FOR MODEL 737
A2A7463 REV A
DA10/20
Cat. No. 448B
CP65
x2 (Lt/Rt - opt)
x6 (unbalanced)
Model 737
MAIN