Ahc-Rac Metadata Connection; Dolby Digital Metadata With The Ahc-Rac; Ahc-561 Module - Harmonic Electra9200 Installation Manual

Multi channel encoder

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Chapter 6 Audio Modules

AHC-RAC Metadata Connection

The AHC-RAC audio options have an RJ-45 connector to accept Dolby metadata.

Figure 6–2

shows the pinout of the connector.

Figure 6–2: AHC Metadata Input Pinout

Dolby Digital signals include metadata describing the contents of an audio stream. The

metadata can assist the decoder in adjusting listening volume, downmixing from multi-

channel to stereo, and other features. The metadata can be received via a serial stream

through the AHC-RAC's RJ-45 connector.

Section

describes the serial connection for this port.

AHC-RAC Metadata Connection

AHC-561 Module

NOTE: The AHC-561 audio card is being deprecated on the Electra 9200/9200D. IOM-RAC2 and AHC-

RAC are the recommended audio cards for the Electra 9200/9200D.

The AHC-561 module has four BNC connectors, which support AES3 and S/PDIF inputs. The

audio module also includes an RJ45 connector that can be used to supply Dolby serial audio

metadata (this is not an Ethernet connector).

Up to 4 AHC-561 cards can be installed in a chassis.

Figure 6–3: AHC-561 Digital Audio Input Ports

Electra 9200, Rev O

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