3 alignment, Alignment – Dolby Laboratories 737 User Manual
Page 21
Model 737 Soundtrack Loudness Meter - Leq(m)
Cat. No. 448B Input Adapter Board
3-3
Table 3-2 Connecting the Cat. No. 448B to the CP65 and CP55
Table 3-3 Pin convention
Table 3-4 Pin convention (continued)
3.
Mount the Cat. No. 448-B to the CP65 back plane using the spacers provided.
4.
Use Table 2-5 to connect the DA10/20 to the positive tags on the Cat. No. 448B
and ground all the negative tags to a 0 V tag on the Cat. No. 448B.
5.
Connect the Cat. No. 448B output to the Model 737.
3.4.3
Alignment
1.
Thread up and play a length of Cat. No. 69T (US) or Cat. No. 1012 with the
cinema processor placed in Format 10 - Dolby Digital. Connect each channel
to the Model 737 in turn and align the Model 737 in calibration mode for a null-
point at 85 dB (L,C,R, Sw) and 82 dB (Ls, Rs) for each channel.
2.
Thread up and play a length of Cat. No. 69T with the cinema processor in
Format 01 - Mono and check that the calibration of the optical pre-amp card
is normal.
3.
Select Format 04 - Dolby Stereo. Connect each channel to the Model 737 in
turn (L, R) and adjust RV1 (L) and RV2 (R) trim pots of the Cat. No. 448B to
obtain a null-point at 85 dB for each channel.
4.
Check that the Model 737 reads 3 dB higher when in Format 05 than in Format 04
for each channel.
Cat. No. 448B
CP65
CP55
From Cat. No. 150 Lt
J7 pin L
J12 pin 10
From Cat. No. 150 Rt
J7 pin J
J12 pin 7
MAT & OPT logic lines
J13 pin W
J6 pin W
SR logic line
0 V (on 448B)
0 V (on 448B)
+15 V
J2 pin 5
J15 pin 5
-15 V
J2 pin 13
J15 pin 13
0 V
J2 pin 9
J15 pin 9
A
B
C
D
E
F
H
J
K
L
M
N
P
R
S
T
U
V
W
X
Y
Z
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
AA
BB
CC
DD
EE
FF
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