Related Manuals for Benchmark DAC1 HDR
Summary of Contents for Benchmark DAC1 HDR
- Page 1 DAC1 HDR Benchmark Instruction Manual Stereo Preamplifier w/ Remote Control, Digital-to-Analog Converter, Headphone Amplifier and Computer Audio Interface...
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Page 2: Safety Information
OR MAKE ANY MODIFICATIONS A VOLTAGE SELECTION SWITCH WITH WITHOUT THE WRITTEN APPROVAL OF TWO SETTINGS: ‘110’ AND ‘220’. CHECK BENCHMARK MEDIA SYSTEMS, INC. TO SEE THAT IT IS PROPERLY MODIFICATION MAY CREATE SAFETY CONFIGURED FOR YOUR LOCATION HAZARDS AND VOID THE WARRANTY. -
Page 3: Table Of Contents
CE Certificates of Conformity Source Selector and ON/OFF Switch Warranty Information HPA2 Headphone Jacks Volume Control Benchmark 1 Year Warranty Benchmark Extended Warranty Rear Panel Analog Input – RCA Unbalanced Computer Input – USB Digital Input 1 – Optical Digital Inputs 2, 3, and 4 - Coaxial... -
Page 4: Features
Coaxial and optical digital inputs support professional (AES) and consumer (S/PDIF) data formats at up to 24-bits/192-kHz Benchmark’s UltraLock™ technology eliminates jitter from all digital inputs (including USB) Jumper-selected low-impedance 10, 20, or 30 dB pads on balanced outputs HPA2™ gain jumpers for customizing headphone output gain for headphone sensitivities Left-most headphone jack auto-mutes XLR and RCA outputs (feature may be disabled) Status LED’s - display input selection, mute, dim, standby, and error conditions... -
Page 5: Overview
The DAC1 HDR is designed for maximum transparency and purity. The sonic integrity DAC1 Heritage of the DAC1 HDR makes it well suited for critical playback in recording studio control rooms and mastering rooms. The remote- The pristine audio performance of the award- control makes it an asset to any high-end winning DAC1 has made it the ‘Benchmark’... -
Page 6: Advancedusb Audio
140 dBFS, application of jitter amplitudes as when digital transmission errors occur. The high as 12.75 unit intervals (UI) and DAC1 HDR does not mute when the AES or application of jitter over a frequency range of S/PDIF input data is all zeros. Consequently, 2 Hz to 200 kHz. -
Page 7: Low-Noise Internal Power Supply
The DAC1 HDR is phase-accurate between channels at all sample rates, and is phase accurate between any combination of DAC1, DAC1 USB, DAC1 PRE, and DAC1 HDR converters at sample rates up to 96 kHz. Phase-accurate multi-track and 5.1 surround systems are easily constructed using any combination of DAC1 series converters. -
Page 8: Quick Start Guide
‘Input Up’ / ‘Input Down’ • needed. Pressing the ‘OFF’ button while in ‘Volume Up’ / ‘Volume Down’ • ‘Mute’ mode will turn off the DAC1 HDR. ‘Soft Mute’ • ‘Dim’ • DAC1 HDR... -
Page 9: Volume Control Modes
(balanced XLR and unbalanced RCA analog). A rotary Source Selector control selects any of the 6 inputs to the DAC1 HDR. Pressing A rear-panel switch selects between the Source Selector toggles the DAC1 HDR Calibrated, Mute and Variable output on and off. -
Page 10: Front Panel
Front Panel Input Status Display Error Indication The DAC1 HDR has a six-LED status indicator The Input Status Display will flash when an on the front panel. error occurs on the selected digital input. The type of error is indicated by the number of flashes before standby engages. -
Page 11: Source Selector And On/Off Switch
Press the being used. This auto-mute feature can be control knob to turn the DAC1 HDR on or off. enabled or disabled via an internal jumper. Instructions for setting the auto-mute jumper The ‘ON/OFF’... -
Page 12: Volume Control
Instructions for setting the XLR pads are unbalanced RCA analog outputs when the detailed in the ‘Internal Settings’ section of rear-panel Output Level Switch is set to this manual. The DAC1 HDR is shipped with Variable. the XLR attenuation set to -20 dB. DAC1 HDR... -
Page 13: Rear Panel
The USB input accepts a ‘B-type’ male USB 1.1 or USB 2.0 connector. An ‘A-B type’ USB The optical and coaxial can decode AES/EBU cable is provided with the DAC1 HDR. The and S/PDIF input signals in either professional USB cable connects the DAC1 HDR directly or consumer formats. -
Page 14: Digital Input 1 - Optical
Vpp consumer-format digital audio signals application pages for the latest (commonly known as S/PDIF). The coaxial information on media players, media inputs on the DAC1 HDR are designed to servers, operating systems, and audio- accept either type of signal. related computer accessories: www.benchmarkmedia.com/wiki... -
Page 15: Output Level Switch
Volume Control). output drivers, will increase power consumption, and may cause distortion. TIP: If the DAC1 HDR is being used in a critical signal chain (such as a broadcast facility or theater) the headphone mute switch should be defeated using the internal jumpers. -
Page 16: Unbalanced Rca Analog Outputs
1360 feet (see HDR will operate normally over a range of 90 Table 1). But, long un-balanced cables to 140 VAC. At 220, the DAC1 HDR will will generally suffer from hum problems operate normally over a range of 175 to 285 due to ground loops. -
Page 17: Low-Impedance Passive Pads
The XLR outputs are equipped with low- impedance passive pads that may be used to reduce the output levels while preserving the The DAC1 HDR cover must be removed to full dynamic range of the DAC1 HDR. The gain access to the jumpers. Do not attempt DAC1 HDR ships with the 20 dB pads to remove the faceplate or rear panel. -
Page 18: Calibration Trimmers
Most professional equipment will work well at these levels. Note: The Calibration Trimmers have no effect on the output levels when the Output Level Switch is set to Variable. DAC1 HDR Instruction Manual Rev A Page 18... - Page 19 Headphone Switch Disable (JP2 and JP4): Photo 2 – Headphone The DAC1 HDR is configured so that the analog outputs will mute when a headphone plug is inserted into the left-hand jack. This is convenient when the user wishes to switch between headphones and speakers.
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Page 20: Rack Mounting
Adapter An optional rack mount adapter allows the The Universal Rack Mount Adapter is a mounting of any two Benchmark System1™ tray that mounts up to two System1™ products in a single rack space. A Blank products in a single race space. The tray Rack Panel can be added when only one unit accepts any combination of System1™... -
Page 21: Benchmark Technologies
HPA2™ Headphone Amplifier loads, 30-Ohm headphone loads, and 600- Ohm headphone loads are virtually identical. The DAC1 HDR headphone output is driven The HPA2™ will substantially improve the by Benchmark’s signature HPA2™ headphone sound of 30 and 60-Ohm headphones. It will amplifier. - Page 22 ‘muddiness’ measurable jitter artifacts. that was not in the original audio. The DAC1 HDR, DAC1, DAC-104, ADC1 and Jitter induced sidebands can be measured the ADC-104 employ Benchmark’s using an FFT analyzer.
- Page 23 D/A. The have audible (and measurable) effects on A/D consistent performance delivered by the and D/A devices. Practitioners of Digital Audio DAC1 HDR eliminates one major variable: need to understand these effects. jitter. DAC1 HDR Instruction Manual...
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Page 24: Advancedusb Audio™ Technology
96 kHz, 24- (memory and CPU) than native solutions. bit, the Benchmark USB solution is a dream- come-true for lovers of high quality audio It is also interesting that many of the ASIO playback. - Page 25 16-bit material. Native Benchmark USB device. Any audio played USB output devices have had a reputation for from the computer will then be routed to the poor sound quality.
- Page 26 Benchmark’s AdvancedUSB Audio™ solution Microsoft Windows® Test Results offers users the convenience of simultaneous high-quality playback from more than one No system settings should be required for Windows® application. Kmixer’s sample- high-quality playback under 2000, XP or rate-conversion is disabled as long as all Vista.
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Page 27: Performance Graphs
Frequency Response at Fs = 48 kHz The above graphs show the frequency response of the DAC1 HDR when it is operating at a 48-kHz sample rate. The top graph shows that the differential phase is better than ± 0.5º at 20 kHz. The bottom graph shows the amplitude response on a highly expanded 0.05 dB/division scale. - Page 28 Frequency Response at Fs = 96 kHz The above graphs show the frequency response of the DAC1 HDR when it is operating at a 96-kHz sample rate. The top graph shows that the differential phase is better than ± 0.5º at 20 kHz and better than ±...
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Page 29: Fft Analysis Of Idle Channel Noise
FFT Analysis of Idle Channel Noise The above graph demonstrates that the DAC1 HDR is free from idle tones and clock crosstalk. The highest spurious tone measures –128 dBFS and is AC line related hum. The highest non-line related tone measures –138 dBFS. -
Page 30: Multi-Unit Phase Response
Multi-Unit Phase Response Any combination of DAC1, DAC1 USB, and DAC1 HDR converters may be used to create a multi- channel playback system that maintains phase accuracy across all channels at sample rates up to 110 kHz. The above graph shows the differential phase between 10 audio channels using 5 DAC1 converters operating at 96 kHz. -
Page 31: Thd+N Tests
109 dB less than the – 3 dBFS test tone (and 112 dB less than the full scale output of the DAC1 HDR). This implies that the distortion created by the DAC1 HDR should be below the threshold of hearing unless playback levels exceed 112 dB peak SPL. Distortion should still be well masked at higher playback levels. - Page 32 THD+N vs. Level at 1 kHz – Balanced Outputs Below –4 dBFS, distortion is lower than the noise floor of the converter. Above –3 dBFS, distortion reaches a maximum value of only –107 dBFS. DAC1 HDR Instruction Manual Rev A...
- Page 33 This graph shows the output of the HPA2™ headphone amp driving a 60-Ohm load at a very high level (+14 dBu). Even under these conditions, the HPA2™ delivers the full rated performance of the DAC1 HDR. Compare this to the performance of the balanced outputs (see previous graph). DAC1 HDR...
- Page 34 THD+N vs. Level at 1 kHz - Unbalanced Outputs This graph demonstrates the performance of the unbalanced outputs. Note that the performance is nearly identical to that of the balanced outputs. DAC1 HDR Instruction Manual Rev A Page 34...
- Page 35 THD+N vs. Sample Frequency The above graph shows that the DAC1 HDR provides consistent performance at all sample rates. Distortion is not a function of sample rate. The minor variations in the above plots are due to measurement limitations. DAC1 HDR...
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Page 36: Jitter Tests
The graph above shows the results of a standard AES jitter tolerance test. The top (red) curve shows the amplitude of the jitter applied to the inputs of the DAC1 HDR. The scale for the top curve is on the right hand side of the graph and is calibrated in UI of jitter. - Page 37 DAC1 performance did not change when the jitter was turned off. The same test was conducted using FFT analysis to look for jitter-induced artifacts. No change was observed on a FFT analysis (see the next graph). DAC1 HDR Instruction Manual Rev A...
- Page 38 Immunity to Cable-Induced Jitter The above FFT plots demonstrate that the performance of the DAC1 HDR is not degraded in any way when long cables are used to transmit digital audio to the DAC1 HDR. DAC1 HDR Instruction Manual Rev A...
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Page 39: Input Sensitivity Tests
Coaxial Digital Input Sensitivity The above graph shows that the performance of the DAC1 HDR is not a function of the signal level at the coaxial digital input. When the signal is too low to decode (< 120 mVpp), the converter mutes gracefully. - Page 40 Minimum Eye Pattern The above graph demonstrates that the DAC1 HDR can operate with an eye pattern considerably smaller than specified by the AES. In addition, the above plots show that while the AES minimum eye pattern specifications are barely met at the end of 1000 feet of Category 5 UTP cable, the DAC1 HDR receivers have enough sensitivity to allow reliable operation.
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Page 41: Specifications
< -126 dB Inter-channel Differential Phase (Stereo Pair – any +/- 0.5 degrees at 20 kHz sample rate) Inter-channel Differential Phase (Between DAC1 HDR +/- 0.5 degrees at 20 kHz Units Fs<110 kHz) Inter-channel Differential Phase (Between DAC1 HDR +/- 4.1 degrees at 20 kHz Units Fs>110 kHz) -
Page 42: Group Delay (Latency)
Delay = 1.01 ms + (48/Fs) 1.55 ms at 88.2 kHz 1.51 ms at 96 kHz Where Fs = the sample rate in Hz. 1.28 ms at 176.4 kHz 1.26 ms at 192 kHz DAC1 HDR Instruction Manual Rev A Page 42... -
Page 43: Analog Audio Inputs
>1.2 UI sine at 40 kHz >0.4 UI sine at 80 kHz >0.29 UI sine at 90 kHz >0.25 UI sine above 160 kHz Jitter Attenuation Method Benchmark UltraLock™ - all inputs DAC1 HDR Instruction Manual Rev A Page 43... -
Page 44: Balanced Analog Outputs
Output Level Range (at 0 dBFS) In ‘Variable’ Mode Off to +11 dBu Calibration Adjustability 2 dB / turn Output Level Variation with Sample Rate (44.1 kHz vs. < +/- 0.006 dB 96 kHz) DAC1 HDR Instruction Manual Rev A Page 44... -
Page 45: Hpa2 Tm Headphone Outputs
Single Flashing LED: Signal error on selected input All LED’s Solid: Indicates ‘Mute’ mode Five LED’s Solid: Indicates ‘Dim’ mode, with unlit LED indicating selected input None: ‘OFF’ mode or no power DAC1 HDR Instruction Manual Rev A Page 45... -
Page 46: Ac Power Requirements
BNC-to-RCA adapter Width 9.5” (249 mm) Height 1.725” (44.5 mm) Weight DAC1 HDR only 3.5 lb. DAC1 HDR with remote control, power cord, extra 4.5 lb. fuses, and manual Shipping weight 7 lb. DAC1 HDR Instruction Manual Rev A... -
Page 47: Regulatory Compliance
(European Union) directive 2002/95/EC, or, RoHS (Restrictions of Hazardous Substances). As of July 01, 2006, All Benchmark Media Systems, Inc. products placed on the European Union market are compliant (containing quantity limit weight less than or equal to 0.1% (1000 ppm) of any homogeneous Lead (Pb), Mercury (Hg), Hexavalent Chromium (Cr VI), and flame retardant Polybrominated Biphenyls (PBB) or Polybrominated Diphenyl Ethers (PBDE)). -
Page 48: Ce Certificates Of Conformity
CE Certificates of Conformity DAC1 HDR Instruction Manual Rev A Page 48... - Page 49 DAC1 HDR Instruction Manual Rev A Page 49...
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Page 50: Warranty Information
In the event of failure of a product under this warranty, Benchmark Media Systems, Inc. will repair, at no charge, the product returned to its factory. Benchmark Media Systems, Inc. may, at its option, replace the product in lieu of repair. -
Page 51: Benchmark Extended Warranty
Benchmark Extended Warranty The Benchmark Extended 5* Year Warranty Benchmark Media Systems, Inc. optionally extends the standard one (1) year warranty to a period of five (5)* years from the date of delivery. *For the extended warranty to become effective, the original purchaser must register the product at the time of purchase either by way of the enclosed registration card or through the product registration section of the Benchmark Media Systems, Inc. - Page 52 Copyright © 2007, 2008, 2009 Benchmark Media Systems, Inc. All rights reserved. Benchmark Media Systems, Inc. Benchmark Media Systems, Inc. 203 East Hampton Place, STE 2 Syracuse, NY 13206-1633 PHONE: +1-315-437-6300 FAX: +1-315-437-8119 www.benchmarkmedia.com DAC1 HDR Instruction Manual Rev A...
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