The 500AMDA-AESU is a five output reclocking and auto equalizing AES Audio DAC & Distribution Amplifier for unbalanced 75Ω AES signals. It is also a high quality 24-bit audio DAC. The 500AMDA-AESU automatically equalizes up to 1000m of Belden 1694A coax and provides reclocked outputs. The 500AMDA-AESU also converts AES/EBU digital signal to 2 balanced analog audio outputs. The input sample rates supported are 32kHz, 44.1kHz and 48kHz. Analog audio output levels may be set individually from the front panel.
Level control is provided via a card edge toggle. The full scale digital signal can be calibrated to produce analog peak levels ranging from 12dBu to 24.8dBu with 0.1dB resolution. The 500AMDA-AESU card edge LED indicators provide quick and accurate assessment of the incoming signal integrity. Balanced analog audio is provided via a terminal strip adapter.
The 500AMDA-AESU is housed in the 3RU 500FR 
frame that will hold up to 16 modules.
Features
- 24-bit, high-quality D/A conversion
- 32, 44.1 and 48kHz sampling rates supported
- 0dBFS programmable from 12dBu to 24.8dBu
- Support for 2 channels of balanced analog audio (1 AES/EBU)
- VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 500FR frame with 500FC VistaLINK® Frame Controller
- Inputs
- AES3-2003 standard for AES audio on 75Ω coax
- EQ and reclock provide extended cable length compensation (> 1000m)
|
- Outputs
- Five 75Ω coax outputs
- 2 balanced analog audio outputs
- Card Edge LED's
- Module Health Status
- AES signal present
- Detected AES sample rate
- PCM versus non-PCM data
- Audio level bargraph with ballistics
|
Block Diagram
Specifications
| AES Audio Input |
|---|
| Standard | AES3-2003, unbalanced AES |
|---|
| Number of Inputs | 1 |
|---|
| Connectors | BNC per IEC 61169-8 Annex A |
|---|
| Signal Level | 0.1 to 2.5V p-p |
|---|
| Equalization | > 1000m @ 48kHz with 1V p-p drive and Belden 1694A or equivalent coax cable |
|---|
| Resolution | 24 bits |
|---|
| Sample Rate | 32kHz, 44.1kHz, and 48kHz; ±100ppm |
|---|
| Input Impedance | 75Ω AC-coupled |
|---|
| Return Loss | > 25dB, 100kHz to 6.0MHz |
|---|
| BNC Grounding | AC-coupled (for 60Hz ground loop current protection) |
|---|
| AES Audio Outputs |
|---|
| Standard | AES3-2003, unbalanced AES |
|---|
| Number of Outputs | 5 |
|---|
| Connectors | BNC per IEC 61169-8 Annex A |
|---|
| Sample Rate | Same as input |
|---|
| Impedance | 75Ω unbalanced |
|---|
| Return Loss | > 25dB, 100kHz to 6.0MHz |
|---|
| Analog Audio Outputs |
|---|
| Type | Balanced analog audio |
|---|
| Number of Outputs | 2 |
|---|
| Connector | Two 3-pin removable terminal strips on BNC adapter panel |
|---|
| Output Impedance | 66Ω |
|---|
| Output Load | 600Ω or high impedance (10kΩ) |
|---|
| Signal Level | 0dB FS a +12 to +24.8dBu into 10kΩ load (user settable) |
|---|
| DC Offset | < ±30mV |
|---|
| Frequency Response | < ±0.05dB (20Hz to 20kHz) |
|---|
| Dynamic Range | 24 bits |
|---|
| THD+N | < -100dB RMS @ 1kHz, with 24dBu output |
|---|
| SNR | > 110dB RMS (20Hz to 20kHz), "A" weighted |
|---|
| Inter-Channel Phase Error | < ±1° (20Hz to 20kHz) |
|---|
| Crosstalk Isolation | > 110dB RMS (20Hz to 20kHz), unweighted |
|---|
| Digital to Analog Delay | 0.95ms |
|---|
| Electrical |
|---|
| Voltage | +12V DC |
|---|
| Power | 6 Watts |
|---|
| EMI/RFI | Complies with FCC Part 15 Class A
EU EMC Directive |
|---|
| Physical |
|---|
| Number of slots | 1 |
|---|
