Installation manual

Model DMA
™
8 Installation Manual Installation
2-7
2.6.2 RS-232 Serial Control Port
The rear-panel RS-232 connector can be used for serial control of the DMA8 using
ASCII character strings for remote switching and testing. See Section 5.3 for a listing
of the available serial commands. An expanded command set will become available
in future software releases.
2.6.3 Serial Data In/Out—Auto Dolby Digital Surround EX Control
The Serial Data In connector accepts the film sound data bitstream from a
Dolby DA20. The Serial Data To SA10 connector outputs the bitstream to a
Dolby SA10 equipped with an Cat. No. 814A Surround EX
™
auto-switching board.
Note: SA10s equipped with the original Cat. No. 814 (non-A) board do not need
wiring to this connector. Automatic switching of Surround EX does not
function.
If you have an SA10 equipped with a Cat. No. 814A board, disconnect the existing
serial data cable from the DA20 rear panel and connect it to the DMA8’s Serial Data
To SA10 connector. Add a jumper cable to connect the DA20 Serial Data output to
the DMA8’s Serial Data In connector.
When in Film mode, the film sound data bitstream passes directly from the DA20 to
the SA10, allowing the DA20 to control the Surround EX switching function in the
SA10.
When in Digital Media mode, the DMA8 controls the automatic Surround EX
function of the SA10 by inserting (or not inserting) the Surround EX data flags in the
bitstream to the SA10.
2.7 Wiring Diagrams
This section contains connection diagrams for various cinema processors. Choose the
appropriate diagram based on your installed equipment.