The HR‑DAC1 is the ideal choice in installations requiring high quality analog audio from an AES/EBU, AES‑3ID or S/PDIF digital audio source. The HR‑DAC1 automatically detects a valid input on any of the four input jacks: S/PDIF optical, S/PDIF coaxial, AES‑3ID or AES/EBU. The AES/EBU input is 110 Ω terminated; the S/PDIF coaxial and AES‑3ID jacks are 75 Ω terminated. A front‑panel LOCK LED indicates the presence of a valid digital audio source without any phase‑lock or bit errors. Sample rates from 32 kHz to 192 kHz are supported with front‑panel LEDs to indicate standard digital audio rates of 44.1 kHz, 48 kHz, 96 kHz and 192 kHz. Professional operating stability is achieved with RDL's proprietary Sure‑Lok^TM latch‑up auto recovery.

The digital input is converted to stereo audio using high speed delta‑sigma conversion, digital filtering and filtered wideband analog drivers. The high performance, low‑noise converters are supplemented with digitally controlled analog gating to produce unparalleled performance. The LEFT and RIGHT output levels are individually adjustable using front‑panel knobs. A dual‑LED VU meter displays the output level of each channel to facilitate level adjustments. Balanced +4 dBu audio outputs are provided on a rear‑panel detachable terminal block and on XLR jacks. Unbalanced ‑10 dBV outputs are provided on phono jacks.

The HR‑DAC1 is powered from 24 Vdc, which may be connected through the detachable terminal block or through the dc power jack. A front‑panel power switch is provided.

• Broadcast Quality Audio Digital to Analog Conversion
• Input: AES/EBU, Coaxial or Optical S/PDIF, AES-3ID
• Outputs: Balanced and Unbalanced Stereo Audio
• Adjustable Audio Output Gain Trim
• Dual-LED Audio Output Level VU Metering
• Operation Up to 24 bits, 192 kHz
• Exclusive Sure-Lok™ Auto-Recovery Sentinel
• Transformer Isolated AES/EBU Input
• Automatic Sample Rate Detection with Indicators
• Digital Signal Lock Indicator for Valid Inputs

• Inputs (4):
  • 110 ohms AES/EBU XLR, transformer isolated; S/PDIF optical;
    
  • 75 ohms S/PDIF coaxial phono jack; 75 ohms AES-3ID BNC
• Outputs (6): Left and Right: 150 ohms bal. XLR and terminal block, +4 dBu; -10 dBV unbal phono jack
• Sample Rate: 32 kHz to 192 kHz
• Resolution: 16 to 24 bits
• Frequency Response: 5 Hz to 24 kHz (+/- 0.2 dB into high impedance load)
• THD+N: < 0.002% (20 Hz to 20 KHz, below +22 dBu)
• Harmonic attenuation:
  
  • 2nd: -105 dB; 3rd: -108 dB; 4th, 6th: -115 dB;
    
  • 5th, 7th: -110 dB; above 7th: <-115 dB, typical
• Crosstalk: < -100 dB (5 Hz to 3 kHz); < -90 dB (3 kHz to 20 kHz)
• Output Level: Adjustable OFF to +24 dBu (0 dBFS); Left and Right
• Phase L to R, R to L: +/-0.15° (5 Hz to 20 kHz)
• Residual Noise:
  
  • < -100 dB (10 to 20 kHz, -120 dBFS input)
    
  • < -100 dB (10 to 20 kHz, -120 dBFS input)
    
  • < -110 dB (locked to digital input, digital audio off)
• Dynamic Range: > 110 dB (resolution 24-bit unweighted)
• Indicators (10):
  
  • POWER LED, blue; LOCK LED, green;
  • RATE: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz;
    dual-LED VU meters, left and right
• Standards: AES3-2003, IEC60958
• Power Requirement: GROUND-REFERENCED 24 to 33 Vdc @ 175 mA
• Ambient Operating Environment: 0° C to 55° C