Dolby Laboratories 585 - Manual (Page 13)

Model 585 Time Scaling Processor Getting Started
2-3
Figure 2-1 definitions:
1. Digital Inputs . Model 585 requires PCM audio input at a sample rate of
48 kHz ± 15%. Each input has two connectors; either connector can be used for
the input or as a loop-through for that channel pair. If the loop-through connection
is not being used, it must be fitted with a 75
Ω
termination. The last device in the
loop-through signal chain must be terminated with 75
Ω.
Note: Ch 1/2 requires a valid PCM digital audio signal. That input is used to derive
the clocks for all input channels and is the reference clock for scaling.
2. AES Ref . Connect to an AES digital audio reference source. The second connector
can either be used as a loop-through or be terminated, as appropriate.
Note: AES Ref requires a valid AES digital audio signal. That input is used to derive the
clocks for all output channels and so is the reference clock for the digital outputs.
3. Digital Outputs . These connections carry the processed PCM signal.
2.3.2 Serial Connection Ports
Figure 2-2 shows the serial connection ports.
Metadata Out Metadata Out GP I/O
Remote RS-232 Remote RS-232 Metadata In Metadata In
1
3
2
4
Figure 2-2 Connections: Remote RS-232, GP I/O, Metadata In and Out
Figure 2-2 definitions:
1. Remote RS-232 . Connect to this port to update Model 585 software.
2. Metadata In . (Reserved for future use.) Input port for external metadata. Connect
to a device that delivers Dolby ® metadata, such as a Dolby E decoder or Model
DP570 Multichannel Audio Tool.
3. GP I/O . This port provides a fixed, TTL level-sensitive output indicating the
current status of Model 585.
4. Metadata Out . (Reserved for future use.) Output port for metadata. Connect to a
downstream Dolby E or Dolby Digital encoder.