Miranda DAP-1781-3RU 8 channel digital audio processor
Miranda DAP-1781-3RU 8 channel digital audio processor - DAP-1781-3RU
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.
Key Features
- 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 2020-A)
Specifications
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 Kbps
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
Diagram
| Manufacturer | Grass Valley |
|---|
