User manual GRASS VALLEY 8977AP-4B DATASHEET

[. . . ] 22 8977AP-4B Digital Audio Processor ­ Balanced I/O w/Delay Key Features · Eight independent channels of audio processing · Four AES Inputs and four AES outputs ­ all balanced · 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 The 8977AP-4B is a compact, highperformance, high-density digital audio processor. [. . . ] A particularly powerful feature of the 8977AP-4B is its ability to handle Dolby E streams. These can be both routed and delayed while preserving the non-PCM data. The 8977AP-4B 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 all balanced (see 8977AP-4U for unbalanced 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 module by fitting the optional 8900GEN-SM Two Channels or One Stream Sample Rate Converter Pin 3 + Pin 2 _ Pin 1 G 8900BA-R J1 J2 J3 G Pin 1 _ + Pin 3 Pin 2 Audio Input J5 J4 Audio Output J7 J6 J8 J9 J10 Audio Delay Tracking Input Ref Input J11 J12 Not Used J13 J14 Not Used reference input submodule 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 Signal type: Balanced AES-3id-1997 Common mode range: Balanced 10 Vp-p DC 500 Hz to 20 kHz 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:Balanced:110 Connector type: Balanced: mini-screw terminal block 8977AP-4B Audio processor ­ eight channels ­ balanced audio I/O, front and rear module set 8977AP-4U Audio processor, front and rear ­ eight channels ­ unbalanced audio I/O (see next 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 8900-GFA-CBL Package of four three-terminal to dual BNC cables, used for unbalanced outputs on 8900A-R modules in a GeckoFlex frame For detailed specifications, installation, and setup instructions see: www. grassvalley. com/docs/modular [. . . ]