Author: Daniel Weiss, Weiss Engineering LTD. Weiss Engineering LTD. reserves the right to make changes to product specification or documentation without prior notice. Updated manuals and datasheets are available at our website for downloading. Weiss Engineering LTD. makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does part of this manual, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.
In 1985, Mr. Weiss founded the company Weiss Engineering Ltd. From the outset the company concentrated on the design and manufacture of digital audio equipment for mastering studios.
2007 Introduction of the CASTOR, our High-End Hi-Fi Power Amplifier 2008 Introduction of the MINERVA Firewire DAC and the VESTA Firewire – AES/EBU Interface 2010 Introduction of the DAC202 Firewire DAC, the INT202 Firewire Interface and the ATT202 Passive Attenuator ADVANCED DIGITAL AND ANALOG AUDIO CONCEPTS EXPLAINED...
OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER D/A converter unit or by the same mechanisms as described above except for the motors of course. In the case of a stand-alone D/A converter (as the DAC202), one has to take two different jitter contamination paths into account.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Converter (A/D). The inverse in the Digital to Analog Converter (D/A). A physical law states that in order to represent any given analog signal in the digital domain, one has to sample that signal with at least twice the frequency of the highest frequency contained in the analog signal.
Analog Output Stages The DAC202 employs separate output stages for the main output and the headphone output. Both stages use state of the art operational amplifiers with high slew rate. A topology with a very low output impedance has been chosen. This assures that...
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If you would like to dive further into those issues I recommend to visit the website of Mr. Bob Katz, a renowned Mastering Engineer and a Weiss Engineering customer. He publishes articles on Dithering and Jitter and many other topics at http://www.digido.com/...
Dual / Single Wire modes: The AES/EBU inputs / outputs of the DAC202 normally work in the so called “Single Wire” modus, i.e. both audio channels are transferred via a single cable. The DAC202 also supports the “Dual Wire”...
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One brightness level is active when operating the rotary encoder knob or the remote control. The other brightness level is active when the DAC202 or the remote control are not touched. This allows to dim the LCD when the information on the LCD screen is not required.
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This feature can verify the bit transparency of any player software running on a computer. For that purpose audio files are supplied with the DAC202. Playing back these files via the player software to be checked allows the DAC202 software to recognize the bit pattern of the files.
Note that when power is applied to the DAC202 the blue standby LED is lit. When the DAC202 is switched on, the blue LED is turned off and after a short while the LCD screen comes on.
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Here is a rundown of all entries in the Options Menu: Abs. Phase: “+” or “-“. A “+” means the signal is not inverted when passing through the DAC202, A “-“ means the signal is inverted. Upsample Filt.: upsample filter type “A” or “B”. Later software versions may allow to select “C”, “D”...
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This setting is only required if more than one DAC202 unit is connected to the same computer for multichannel playback. In that case one of the DAC202 is the master clock and the other DAC202 units have to be slaved to that master DAC202. This is done by setting the slave DAC202 to “1394 bus”.
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This mode is selected if the DAC202 is used as a preamplifier. If bypassed, the volume knob and the remote control volume work only on the headphone output.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Particularly the sampling rate conversion can creep in “unnoticed”. I.e. the sampling rate in the Weiss Firewire IO window has to match the sampling rate of the file played; else a conversion is going on in the operating system. For iTunes there...
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DAC202 automatically switches to Single Wire mode. Dual wire mode is useful for digital audio equipment connection to the DAC202 where the units only support the high sampling rates (176.4 / 192 kHz) in dual wire mode.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER - The Firewire input is routed to: XLR out, RCA out, APB. - The Firewire output (going to the computer for recording) is fed from the source specified as the sync source: XLR selected as sync source: XLR signal goes to Firewire.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER input, the Toslink input the WC BNC input, the 1394 bus or the internal sync generator. Mode: AES(XLR) input / dual wire / no insert - The XLR input (left channel) and the RCA input (right channel) are routed to: DAC chip, XLR out (left channel) RCA out (right channel), Firewire out, APB.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER - The Firewire input, RCA input and XLR input are not routed anywhere. - The sync source can be specified as the XLR input, the RCA input, the Toslink input the WC BNC input, the 1394 bus or the internal sync generator.
8. Click Restart After installing the drivers, connect the DAC202 to the computer and connect the power cord to the DAC202. Switch the DAC202 on. The DAC202 should now be recognized automatically. In Windows tell the installation window that you do not want to check the Microsoft website for drivers and then let the drivers be installed automatically.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Sync Source: The clock to which the DAC202 should sync to. Usually this is the DAC202’s internal clock generator. Buffer Size: Larger buffer sizes increase robustness against dropouts; lower buffer sizes provide low latency.
OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Technical Data Digital Inputs: (1) XLR connector, (1) RCA connector, (1) Toslink connector (optical), (2) Firewire connectors. All inputs accept professional or consumer standard, i.e. accept AES/EBU or S/PDIF signals. Sampling Frequencies: 44.1, 48.0, 88.2, 96.0, 176.4 or 192kHz on any of the inputs, except Toslink which handles 96kHz maximum.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Synchronization: Synchronized via the input signal, the internal oscillator or via a wordclock signal (TTL level / 75 Ohm) on the BNC input. Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2kHz, 96.0kHz, 176.4khz, 192kHz.
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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER Headphone output: Frequency Response: = 44.1kHz, Filter A: 0Hz ... 20kHz: within +- 0.15dB = 44.1kHz, Filter B: 0Hz ... 20kHz: within +- 1.1dB = 88.2kHz, Filter A: 0Hz ... 20kHz: within +- 0.15dB = 88.2kHz, Filter A: 0Hz ...
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