User manual WEISS DAC1-MKII

[. . . ] For asymmetrical operation only pin 2 of the XLR connector plus ground on pin 1 are used, pin 3 must be left open. * Remote Control: By hooking up an analog potentiometer or fader to the remote connector, the output level can be remote controlled. A stereo potentiometer or fader allows to control the two channels independently. This level control happens in the digital domain and is dithered in order to avoid any sound degrading quantization effects. [. . . ] This allows to use the DAC1 as a monitor switch. The DAC1 is always slaved to the selected input. Because the jitter reduction circuitry in the DAC1 is of the highest possible quality, sepaarate external or internal synchronization is not necessary. For applications in surround setups with more than one DAC1 unit operating in parallel, we will offer a software version which assures a determined, constant delay from input to output. In the current software version this is not the case, i. e. the delay from input to output can vary. The states of all buttons are stored in non-volatile memory, i. e. the setup is retained when powering the unit off. Output Level and Output Connection The output level is set via the "high / low" switch on the backpanel and via the trim potentiometers on the frontpanel. For output levels between +15dBu and +27 dBu balanced (or +9dBu and +21dBu unbalanced) set the switch to "high". For all other levels set it to "low". These output level figures are reached for 0dBFS at the input of the DAC1. After that, adjust the trim potentiometers to match the output level required. Note that the output amplifiers of the DAC1 are powerful class A type discrete circuits. This means that the power dissipation is quite high, so it is absolutely normal for the DAC1 unit to heat up. Important: For unbalanced operation of the DAC1 connect pin 1 (ground) and pin 2 (hot) of the output connectors to your amplifier. Pin 3 must be left open! Daniel Weiss Engineering Ltd. , Florastr. 42, CH-8610 Uster Page 4 of 8 ) +41 1 940 20 06 2 +41 1 940 22 14 8 http://www. weiss. ch / http://www. weiss-highend. com OPERATING INSTRUCTIONS FOR GAMBIT DAC1-MK2 24Bit / 192kHz D/A CONVERTER OPERATION Remote Control Connector A self-made remote control can be hooked up to the remote control connector. Following is the description of how such a circuitry should look like. The pin numbers refer to the 15 pin remote connector pin numbers. The remote level control changes the level in the digital domain, i. e. it is independent of the other level control facilities of the DAC1. Because of the 24 bit digital resolution of the DAC1, controlling the level in the digital domain is not critical for the sonic quality or the signal to noise ratio. [. . . ] > 20kHz +- 0. 05dB @ fs = 48. 0kHz: DC . . . > 20kHz +- 0. 05dB @ fs = 88. 2kHz: DC . . . > 40kHz +- 0. 5dB @ fs = 96. 0kHz: DC . . . > 40kHz +- 0. 5dB 115dB unweighted, 118dB A-weighted -107 dBr @ -3 dBFs input (0dBr = +27dBu) -105 dBr @ 0 dBFs input (0dBr = +27dBu) SNR @ -40dBFS input: 114dBr unweighted (0dBr = +27dBu) 117dBr A - weighted (0dBr = +27dBu) Linearity: from 0 to -100dBFs input level: < +-1dB deviation from ideal from -100 to -130dBFs input level: < +-1. 5dB deviation from ideal Crosstalk: Output Level Range: < -130dB, 0. . 20kHz range switch "high", balanced: +27dBu . . . [. . . ]