DAP-1781
8-Channel Digital Audio Processor

The DAP-1781 is a high quality, 8-channel (4 AES) digital audio processor which performs signal processing and synchronizing, as well as Dolby E and Dolby Digital (AC-3) encoding and decoding with metadata support. It can be used as a standalone audio processor for discrete audio signals, or it can be combined with a wide range of SD and HD video processor modules. When working with a video processor, the DAP-1781 can be used for dynamic processing, up/downmixing, and embedding of discreet audio channels into a video signal. It can also process Dolby E and Dolby Digital (AC-3) signals for encoding or decoding (ABUS). Two audio processing cards can be combined together to process a total of 16 discreet audio channels. When combining any two cards together, all audio channels are synchronous, phased and delay matched to ensure proper alignment.

  • 8 channels of audio processing with 4 AES inputs and outputs
  • Works as standalone audio processor or alongside video processing cards
  • Audio processing functions include gain (-96 to +12 dB), phase, shuffling and mixing
  • Fixed and video tracking delay
  • 2 and 4 channel mix downs and summing
  • Audio crossfades on 2 channel mix
  • Locks to video, URS frame reference or AES2
  • Provides audio level meters streamed over IP
  • Dolby E compliant
  • Metadata input and output (RS-422)
  • Optional downmix (5.1 to 2.0)
  • Optional 16 channel dynamic processing: compressor, limiter, expander
  • Dolby E / Digital decoder option
  • Dolby E / Digital encoder option
  • Optional upmixing using Linear Acoustic technology
  • Optional loudness measurement (ITU-R BS.1770 or Leq (A))
  • Audio metadata processing (SMPTE ST 2020-A)
DIGITAL INPUTS (4)
  • Sampling freq.: 32 to 192 kHz
  • Quantization: 16 to 24 bits
  • AES3
    • Level: 0.2 to 7 Vp-p
    • Impedance: 110Ω balanced
  • AES3-id
    • Level: 0.2 to 2 Vp-p
    • Impedance: 75Ω
  • Return loss: >18 dB at 12 MHz
DIGITAL OUTPUTS (4)
  • Sampling freq.: 48 kHz
  • Intrinsic Jitter: <5 mUI (700 Hz to 100 kHz)
  • AES3
  • Level: 3.7 Vp-p
    • Impedance: 110Ω balanced
  • AES3-id
    • Level: 1.0 Vp-p
    • Impedance: 75Ω
  • Return loss: >15 dB at 6 MHz
PROCESSING PERFORMANCES
  • Sampling freq.: 48 kHz
  • Quantization: 24 bits
  • Freq. response: ±0.02 dB (20 Hz to 20 kHz)
  • SNR: 123 dB (A weighted)
  • THD+N: -130 dB (20 Hz to 10 kHz)
  • Crosstalk: -120 dB (20 Hz to 20 kHz)
  • Audio group delay: 2.2 ms at 48 kHz ISR
  • Data group delay: 0.47 ms at 48 kHz ISR
METADATA INPUT/OUTPUT
  • RS-422: asynchronous serial format 115.2 kb/s
MISCELLANEOUS
  • Tone generator: 1 kHz sine wave interrupted on left channel (250 ms / 3s) EBU R49
  • Signal presence threshold: from -72 to -54 dBFS (6 dB steps)
  • Silence detection delay: From 1 to 255s (1s steps)
  • Fixed delay: 0 to 2.4s
  • Step: 1 ms (coarse), 1 sample (fine)
ELECTRICAL
  • Power: 
    • DAP-1781-xxxx-SRP: 4W
    • DAP-1781-xxxx-DRP: 5W
    • DAP-1781-xxxx-3SRP: 5W
Densité 2 frame Densité 3 frame Description
DAP-1781 DAP-1781-3RU 8 channel digital audio processor
DAP-1781-110-DRP   Double rear connector panel, 110 ohm
DAP-1781-75-DRP DAP-1781-75-DRP-3RU Double rear connector panel, 75 ohm
DAP-1781-DEC-110-SRP   Single rear connector panel for Dolby decoding, 110 ohm
DAP-1781-DEC-75-SRP DAP-1781-DEC-75-SRP-3RU Single rear connector panel for Dolby decoding, 75 ohm
DAP-1781-ENC-110-SRP   Single rear connector panel for Dolby encoding, 110 ohm
DAP-1781-ENC-75-SRP DAP-1781-ENC-75-SRP-3RU Single rear connector panel for Dolby encoding, 75 ohm
  DAP-1781-75-3SRP Single rear connector panel, 75 ohm
  DAP-1781-110-3SRP Single rear connector panel, 110 ohm
 
Options (software) Description
DAP-1781-OPT-DP Dynamic processing (compressor/limiter/expander)
DAP-1781-OPT-UD Upmixing, downmixing
DAP-1781-OPT-LM Loudness measurement
 
Options (hardware) Description
Note: One MOD- per DAP-1781
MOD-LA-DUP-701 Upmixing using Linear Acoustic technology upMAX
MOD-DOLBY-ENC-E Dolby E encoder
MOD-DOLBY-ENC-D-2 Dolby Digital (AC-3) encoder
MOD-DOLBY-DEC-2 Dolby E and Digital (AC-3) decoder
NSH15M HD-15 to terminal block adapter
BOC-DE15-4BNC-1 75 ohm digital audio breakout cable
 
Related products XVP-1801, FRS-1103, ENC-1103, DEC-1003, DEC-1023, UAP-1783, XVP-3901
 
Remote control iControl, iControl Solo, RCP-200

DAP-1781: 8-Channel Digital Audio Processor Datasheet

The DAP-1781 from Grass Valley, a Belden Brand, is a high quality, 8-channel (4 AES) digital audio processor which performs signal processing and synchronizing, as well as Dolby E and Dolby Digital (AC-3) encoding and decoding with metadata support. It can be used as a standalone audio processor for discrete audio signals, or it can be combined with a wide range of SD and HD video processor modules. When working with a video processor, the DAP-1781 can be used for dynamic processing, up/downmixing, and embedding of discreet audio channels into a video signal. It can also process Dolby E and Dolby Digital (AC-3) signals for encoding or decoding (ABUS).

Posted Dec 28 2016 (GVB-1-0354B-EN-DS) File Size: 1.1 MB

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