Dolby Laboratories CP650, Руководство по установке

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Dolby
®
Model CP650 Installation Manual Installation
2-9
Connecting to the Digital Audio Input
The external electrical connections to the optional boards in the CP650 are available
on the 25-pin D-connector marked “Option I/O” on the rear panel of the CP650.
Since the boards have different functionality, each pin on this connector changes its
function depending on which optional card is installed. Refer to Table B-2 for the
signal definitions. Make external connections by soldering the appropriate wires to
the male solder-cup connector shipped with the CP650, then plug this connector into
the Option I/O connector on the CP650.
Note: When wiring to the digital inputs on the Cat. No. 790 or Cat. No. 778, be sure
to ground all unused digital inputs. Failure to do so will cause unused channels to
show signal level due to crosstalk between the used digital inputs and the unused
digital inputs.
In a CP650 equipped with a Cat. No. 790 board, the input type is S/PDIF.
See Figure 2-7 for Option I/O connector hookup details. Refer to Table B-2 for signal
definitions.
14
1 7
25 21
13
OPTION CARD I/O
21
7
13
2
1
4
3
2
1
S/PDIF Digital Inputs
Figure 2–7 Cat. No. 790 S/PDIF Connections
In a CP650 equipped with the earlier Cat. No. 794 board, the input type (AES/EBU
or S/PDIF) must be selected using jumpers on the board. The default factory setting is
AES/EBU. See Figure 2-7 for Option I/O connector hookup details. Refer to
Table B-2 for signal definitions. When a
Cat. No. 778 board is installed, the input
type is always AES/EBU.
1
1
2
3
15
15
red
red
black
black
AES/EBU
Digital Output Source
3
3
2
2
1
1
MADE
IN
U
.S.A/U
.K
.
S/PDIF
AES/EBU
J4
MADE
IN
U
.S.A/U
.K
.
S/PDIF
AES/EBU
J4
1 2
OR
S/PDIF
Digital Output Source
For Cat. No. 778
For Cat. No. 794
Figure 2–8 Cat. Nos. 794/778 AES/EBU and S/PDIF Jumper Selections and Connections