Dolby Laboratories DP572 Manuel D’Utilisation

Dolby E Multichannel Distribution System User Manual 

DP572 Dolby E Decoder

4-4

General Purpose Input/Output (GPI/O) signals for the DP572 are available from the 
Status port, a female DB-9 connector. The input and output signals are 0 – 5 V TTL. 
Table 4-1 defines the pin configuration.

Table 4-1  DP572 Status Port Pin Functions 

Using the Status Port to Select Voiceover and Switched Modes 
The PCM Input channel routing can be changed via the Status port between Voiceover 
and Switched Out modes, which are generally used when Dolby E is part of a distribution 
system without a VTR (i.e., a network feed to an affiliate). 

•

Voiceover mode mixes the PCM input over the main program audio.

•

Switched Out mode replaces the main program audio with the PCM input. 

These modes can be controlled from the front panel, serial remote, or Status port. See 
“Output Routing” on page 8. for a complete explanation of other PCM Chan Config 
Output Routing modes not accessible to change via the Status port.

1

Output

Dolby E Detect

1: Dolby E; 

0: PCM or none

2

Output

Reference Video Valid

1: Valid; 

0: Ref video error

3

Output

Dolby E Decoding Valid

1: Valid; 

0: Decoding error

4

Output

System Operational

1: Functional; 0: Failed

5

Output

Fault

1: Functional;  0: Hardware fault

6

Output

Reserved

7

Input

PCM channel routing

Voiceover and Switched mode

8

Input

PCM channel routing

Voiceover and Switched mode

9

N/A

Ground