User manual GRASS VALLEY 8977AP-4U DATASHEET

[. . . ] 8977AP-4U Digital Audio Processor ­ Unbalanced I/O w/Delay Key Features · Eight independent channels of audio processing · Four AES inputs and four AES outputs ­ all unbalanced · Auto tracking delay to video synchronizers · Fixed delay for each channel up to 10s · Smooth audio handling when adjusting delay · Channel routing for PCM signals, stream routing for Dolby E · Dolby E programmable delay and routing · Sample rate conversion accepts 32 kHz, 44. 1 kHz, 48 kHz, or 96 kHz and outputs 48 kHz · Uses local or frame reference for synchronization · High density (80 PCM channels per 2 RU frame) · Remote control and monitoring via Ethernet frame interface 23 The 8977AP-4U is a compact, highperformance, high-density digital audio processor. [. . . ] A particularly powerful feature of the 8977AP-4U is its ability to handle Dolby E streams. These can be both routed and delayed while preserving the non-PCM data. The 8977AP-4U can handle a mix of Dolby E streams and PCM channels so that, for example, a Dolby stream on AES input 1 can be routed to AES output 2 and then replaced by selected PCM channels on output 1. Audio input and output connectors are unbalanced (see 8977AP-4B for balanced connectors). PCMaudiocanbesynchronizedtoareference; either a color black video reference, tri-level syncs, an AES feed, or even word-clock can be used. Reference can be fed directly to the 8900UE-R J1 J2 J3 J4 Audio Input J5 J6 Audio Output J7 J8 Ref Input J9 J10 Audio Delay Tracking Input Applications · A companion to the 8985, 8995, and 8981 modules with video synchronization to provide AES audio handling with tracking delay · To route and control PCM channels combined with Dolby E audio streams module by fitting the optional 8900GEN-SM reference input sub-module or alternatively taken from one of GeckoFlex's two internal busses. [. . . ] As this module has no card-edge controls, in order to configure this module, an 8900NET (Net Card) Network Interface module is required. Power Rating 6. 0 Watts ­ single slot Tracking Input One wire serial interface (RS-232 type) Format: 1200 baud Parity: Even Bits/word: Seven Stop bit: One Connector type: BNC Audio I/O AES four inputs, four outputs 8977AP-4U Audio processor ­ eight channels ­ unbalanced audio I/O, front and rear module set Signal Type Unbalanced: AES-3id-2001 Common mode range: Unbalanced: N/A Input sampling rate (FS): 32, 44. 1, 48, or 96 kHz Input resolution: 16-, 20-, or 24-bit Input return loss: >20 dB (100 kHz ­ 128 FS) Output sampling rate: 48 kHz Output resolution: 20- or 24-bit Output return loss: >15 dB (100 kHz ­ 128 FS) Input impedance:Unbalanced:75 Connector type: Unbalanced: BNC 8977AP-4B Audio processor, front and rear ­ eight channels ­ balanced audio I/O (see previous page) Electrical Length (delay) PCM mode: 1. 7 ms to 3. 9 ms depending on input sampling rate, typically 3. 9 ms at 48 kHz Non-PCM mode: 280 µs Sync PCM mode: 280 µs 8900GEN-SM Reference input submodule For detailed specifications, installation, and setup instructions see: www. grassvalley. com/docs/modular [. . . ]