Discrete AES Audio Output
The 9034 can emit 16 channels (8 pairs) of discrete AES audio on 75 ohm BNC connections. The AES clock rate will be precisely locked to the output video rate.
AES Audio Input Advanced Features
AES Sample Rate Converter Bypass
The card’s AES inputs have built in sample rate converters that are enabled by default. This allows the card to interface with asynchronous AES sources (sources who’s AES timing does not match the video reference timing.). They can be bypassed with a control in Dashboard or the front panel. This is a necessity when trying to embed
Zero-Delay Audio Embedding
Sometimes it is desirable to embed AES with minimum latency. For example, if you want to embed Dolby E audio into video with no latency, and delay the video by one frame to account for Dolby E encoding delay. By turning this control on for a given AES pair, the pair will be directly embedded into it’s corresponding group, bypassing the normal frame sync audio delay. (AES Pair 1 into Embedded Group 1, ch1 & ch2, AES pair 2 into Embedded Group 2, ch3 & ch4). This control overrides the standard audio routing system: if AES Pair 1 is selected, then the controls to route into Embedded group 1, ch1 & ch2 don’t apply. There is no gain or polarity control available when this option is selected. This control is off by default
Low latency AES Passthrough
This control is similar to zero delay audio embedding. If selected for input pair X it causes AES output pair X to act as a bit for bit copy of AES input pair X. This over rides the normal audio routing and delay. No gain and polarity adjustments are possible. This control is off by default.
Documentation Terms
The following terms are used throughout this guide:
•“Frame” refers to the 8310 frame that houses the 9034 card.
•“Operator” and “User” both refer to the person who uses the 9034.
•“Board” and “Card” all refer to the 9034 card itself, including all components and switches.
•“System” and “Video system” refers to the mix of interconnected production and terminal equipment in which the 9034 operates.
9034 Owner’s Manual • (V 2.0) | Page 9 of 28 |
