User Manual for Benchmark ADC16 - Analog to Digital Converter Click to enlarge the picture
Contents of the user manual for the Benchmark ADC16 - Analog to Digital
- Product category: AD/DA Converters Benchmark
- Brand: Benchmark
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Benchmark AD/DA Converters
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User manual for the Benchmark ADC16 - Analog to Digital contain basic instructions
that need to be followed during installation and operation.
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Product description The ADC16 from Benchmark Media is a sixteen-channel, analog-to-digital converter with a flexible input/output routing solution. In keeping with the company's "pure audio" philosophy, the unit utilizes the UltraLockDDS clock system for virtually indistinguishable jitter. Sixteen transformerless analog inputs with 20 dB gain controls feed the eight converters that feature their own matched-impedance transmission lines, and jitter distortion is always a comfortable 135 dB below the level of music.
By avoiding an asynchronous sample rate conversion system, the converter is able to reduce latency and provide the most direct path from the analog to digital converter to the digital outputs. The UltraLockDDS clock system is based on technology originally intended for high-frequency RF communications systems. It features a fixed-frequency, low-phase noise oscillator with temperature compensation capable of +/-2 PPM frequency accuracy.
The UltraLockDDS system can lock to any sample rate between 28 and 200 kHz almost instantly and is designed with pull-up/pull-down sample rates to handle film or video transfers flawlessly. Jitter is always attenuated to levels that are well below audibility and jitter performance is identical in all modes of operation. A multi-format clock input automatically recognizes AES/EBU, S/PDIF, Wordclock, or Super Clock signals and is used to synchronize the digital outputs. The digital outputs can be clocked to the unit's high-precision internal clock and will automatically revert to the internal clock source if an external clock is interrupted.
With the installed FireWire card the unit can function as a sole interface for a FireWire-equipped DAW. For older systems, connection is possible via the ADAT or coaxial outputs to systems that support those input formats. Front-panel, nine-segment, single-sample accurate meters are included on each channel for monitoring of input levels. The meters can be set to display in 6 dB or 1 dB increments, and in both cases can be put into "peak-hold" mode, which will hold the highest-valued sample until the mode is reset. "Press-and-Hold" buttons are provided for critical settings to avoid any accidental resetting of the unit. - Sixteen channels of analog-to-digital conversion
- Two DB25 connectors for transformerless balanced analog input
- Input gain trim pots for each channel provide high performance over 20 dB range
- Wide input sensitivity range
- Nine-segment dual-range digital LED meters with "peak-hold"
- Conversion at standard sample-rates (44.1, 48, 88.2, 96, 176.4, and 192 kHz) and will also lock to non-standard rates (anything between 28 kHz and 200 kHz)
- Multi-function clock input with auto recognition of AES, S/PDIF, Wordclock, or Super Clock
- Total jitter immunity with the company's phase-accurate UltraLockDDS technology
- Four sets of digital outputs (balanced AES, coaxial, optical, FireWire)
- Independently controlled sourcing (A/D or DAW) for each set of digital outputs
- AES/EBU, ADAT, and ADAT S/MUX2 and S/MUX4 optical output formats
- "Press-and-Hold" buttons to prevent catastrophic incidents
- Internal international power supply with very wide operating range
- Meets FCC Class B and CE emissions requirements
In the Box Benchmark ADC16 - Analog to Digital Converter (FireWire) AC Power Cable 2 x Spare Fuses One (1) Year Warranty to Original Purchaser Table of Contents
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Technical parametersBenchmark ADC16 Specs | | | Connectors | 2 x 25-pin D-Sub for 16 channels (Tascam analog pinout) | | Input Impedance | 200kΩ balanced
100kΩ unbalanced | | Sensitivity | Maximum Gain: -14 dBu @ -20 dBFS
Factory Preset Gain: +4 dBu @ -20 dBFS
Minimum Gain: +9 dBu @ -20 dBFS | | Maximum Input Level | Maximum Gain: +6 dBu @ 0 dBFS
Factory Preset Gain: +24 dBu @ 0 dBFS
Minimum Gain: +29 dBu @ 0 dBFS | | CMRR | >90 dB @ 1 kHz | | Common Mode Trim | Dual Frequency
RF Filter
Transient Protection
Over-Voltage Protection
AC Coupled | | | | Connectors | 2 x 25-pin D-Sub for 16 channels AES3 (Tascam AES pinout)
8 x RCA coaxial for 16 channels AES3
8 x TOSLink optical for 16 channels of AES3, ADAT, ADAT S/MUX2 and S/MUX4 | | Sample Rate | Up to 200 kHz | | Bit Depth | 24-bit | | Output Impedance | D-Sub: 110Ω
Coaxial: 75Ω | | Output Level | D-Sub: 4 Vpp into 110Ω
Coaxial: 1.0 Vpp into 75Ω | | Output Protection | Transformer Coupled
DC Blocking Capacitors
Transient Protection
Over-Voltage Protection
RF Filters | | | | WC/SC/AES Clock Reference Input | 1 x BNC
Impedance: 75Ω
Formats: Wordclock, 256x Super Clock, AES
Sensitivity with Wordclock Input: 320 mVpp
Sensitivity with Super Clock Input: 500 mVpp
Sensitivity with AES Input: 150 mVpp | | AES Clock Reference Input | Connector: Digital In 1 on AES DB-25
Impedance: 110Ω, balanced
Formats: AES, S/PDIF (professional or consumer)
Sensitivity: 150 mVpp | | Input Protection | WC/SC/AES
RF Filter
Transient Protection
Over-Voltage Protection
AC Coupled
UltraLockDDS Jitter Attenuation
AES
RF Filter
Transient Protection
Over-Voltage Protection
Transformer Coupled
DC Blocking Capacitor
UltraLockDDS Jitter Attenuation | | | | Group Delay Time | Delay (Analog Input to Digital Output)
1.49 ms @ 44.1 kHz
1.37 ms @ 48 kHz
0.75 ms @ 88.2 kHz
0.68 ms @ 96 kHz
0.37 ms @ 176.4 kHz
0.34 ms @ 192 kHz | | Frequency Response | @192 kHz
2 Hz to 94 kHz, -3 dB, +0.0 dB
20 Hz to 20 kHz, +/- 0.02 dB
@96 kHz
1 Hz to 47 kHz, -3 dB, +0.0 dB
20 Hz to 20 kHz, +/- 0.01 dB
@48 kHz
1 Hz to 23.6 kHz, -3 dB, +0.0 dB
20 Hz to 20 kHz, +/- 0.01 dB | | SNR | 121 dB, A-weighted, 0 dBFS = +16 to +29 dBu
119 dB, unweighted, 0 dBFS = +16 to +29 dBu
117 dB, A-weighted at maximum gain, 0 dBFS = -10 dBV | | THD + N | 0.00089% (-102 dBFS, -101 dB), 1 kHz @ -1.0 dBFS
0.00063% (-107 dBFS, -104 dB), 1 kHz @ -3.0 dBFS
0.00079% (-105 dBFS, -102 dB), 20 Hz to 20 kHz test tone @ -3.0 dBFS | | Passband Ripple | +/- 0.001 dB @ 44.1, 48 kHz
+/- 0.003 dB @ 88.2, 96 kHz
+/- 0.007 dB @ 176.4, 192 kHz | | Crosstalk | -96 dB @ 20 kHz
-120 dB @ 1 kHz
<-135 dB @ 20 Hz | | Jitter | Jitter tolerance with no measurable change in THD+N performance
>12.75 UI sine 100 Hz to 10 kHz
>3.5 UI sine @ 20 kHz
>1.2 UI sine @ 40 kHz
>0.4 UI sine @ 80 kHz
>0.29 UI sine @ 90 kHz
>0.25 UI sine above 160 kHz | | Digital Signal | Maximum Amplitude of Jitter-Induced Sidebands: <-116 db (10 khz 0 dbfs test tone, 12.75 ui sinusoidal jitter at 1 khz)
Maximum Amplitude of Spurious Tones with 0 dBFS Test Signal: -130 dBFS
Maximum Amplitude of Idle Tones: -130 dBFS | | | | DAW Card Slot | Audio Channels: 16 Input/16 Output
Sample Rates: Up to 200 kHz
Output Word Length: 24-bits
External Interface: FireWire | | Other Functions | Maximum Amplitude of AC Line Related Hum and Noise: -140 dBFS
Inter-Channel Differential Phase (Stereo Pair): +/- 0.25° @ 20 kHz
Inter-Channel Differential Phase (Between ADC16 Units): +/- 0.25° @ 20 kHz
Maximum Lock Time After Fs Change: <8 seconds
Mute on Sample Rate Change: Less than 8 seconds duration
Mute on Loss of External Clock: After 5 seconds of no clock
Mute on Lock Error: After 5 seconds of no lock | | Power Requirements | 90~264VAC, 47-63 Hz, internal universal power supply | | Dimensions (WxDxH) | 19 x 12.5 x 1.73" (483 x 318 x 44 mm) | | Weight | 7 lb (3.2 kg) |
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