DIGITAL-ANALOG CONVERTER DAC V800 (version 2.
Content Theme Page About Violectric Safety Instructions The Earth / Grounding Concept Connection / Connectors General Operation Things to know Dismantling / Jumper Setting Technical Data Conformity Statement Warranty 2 3 5 7 9 10 11 18 20 22 23 24
Cordial thanks for your decision in favour of a product ! is a trademark and product line of Lake People electronic GmbH. Lake People electronic GmbH develops, manufactures and distributes products in the professional range, for broadcast, television, airports, exhibition halls, festival venues, theatres, large-scale installations, private studios and more. In the private sector as well, Lake People products become increasingly popular due to their outstanding quality.
How do devices get to the customer ? devices can be obtained from respective specialist suppliers. If there is none such accessible regionally, the customer is supported by transregional distribution partners (google may help...) and, of course, by Lake People electronic GmbH themselves. … and if it doesn't work like it should ? devices are covered by a 24-month warranty. In case of any malfunction during this period, they can be shipped to the manufacturer directly.
General Safety Instructions WARNING For your protection, please read the following: Water, Liquids, Moisture: This appliance should not be used near water or other sources of liquids. Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. Power Sources: The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.
Mains Fuse: The mains fuse of this appliance is soldered in place and accessible from the inside only!! A blown fuse may indicate an internal problem and should be replaced during qualified servicing or repair work !! Switchable Power Supply: Connect this unit to the power source indicated on the equipment rear panel only to ensure safe operation !! This unit is provided with an internally settable mains supply for 115 / 230 V AC.
The Earth / Grounding Concept General GROUND-LIFT Jumper (accessible from the inside. Mind the SECURITY INSTRUCTIONS !! ): Ex-works this jumper is set to the LIFT position. The internal ground potential is “lifted” by means of this jumper. As a result, the interconnection for DC voltages and lower frequencies (< 150 Hz) will be cut. Higher frequencies will be bled off to earth potential through the RC filter. The LIFT position is helpful in case of hum or jitter caused by different ground/earth potentials.
Unfortunately there is no general recommendation how to solve hum and jitter problems - or even minimize them. The best way to succeed is to check different options !! In case of balanced cables, it should always been verified if the shield of the cable is connected to the shell of the XLR connector. The shell is ALWAYS connected to earth potential when the connector is inserted !! Concerning ANALOG inputs and outputs, the relationship between ground and earth may be modified.
Connection / Connectors 9
GENERAL INFORMATION The VIOLECTRIC DAC V800 is a top-range D/A converter, distinguished by its very particular analog output stages. By means of their specially designed, variable low-noise and low-distortion circuitry, the DAC V800 fulfils even highest demands.
THE CASE The DAC V800's case as well as the front/rear panels are made of solid aluminium. This choice of material ensures high mechanical stability and resistance. EARTH AND GROUND The DAC V800's case is grounded. Internal reference ground is bridged to protective earth by means of a jumper. The jumper is set to the 'LIFT' position (see also: page 7 "Earth/Ground concept", page 21 "Technical Appendix").
THE DIGITAL INPUTS Four digital inputs are found on the unit's rear panel. They are denoted according to their electrical properties: balanced, coaxial (unbalanced), optical and USB. You won't find terms like AES, S/P-DIF, professional or consumer here, since it doesn't matter at all which signal type is applied to a dedicated input. The electrical inputs (Bal and Coax) accept PCM-encoded digital audio data with a word length of 16 ... 24 Bit and 28 ... 210 kHz sample rate. So does the optical input.
THE DIGITAL OUTPUT The digital output is located on the rear panel. It is fitted with a Cinch socket according to IEC 958, unbalanced at 75 ohms output impedance. The level at this output however complies with AES-3-id (1 Vss). The data word on this output is the same as on the selected input by default. But the output data may also be processed nearly free of jitter by the resampling module in “BEST”-mode. To change the mode from the digital output press the “MODE” button for about 2 sec.
THE ANALOG OUTPUTS The analog outputs are situated on the rear panel, fitted with electronically balanced XLR terminals, as well as cinch sockets. Both outputs may be used simultaneously !! Polarity of the XLR terminals complies with AES 14-1992: 1 = ground, 2 = (+) in phase, 3 = (-) out of phase. Source impedance of all analog outputs is significantly lower than 1 (one) ohm ! NOTE: When connecting unbalanced lines to the balanced outputs, pin 3 must not be bridged but left unused.
THE MUTE BUTTON Output signal is fully cut by means of the “MUTE“ button. When engaged, the red “MUTE ON / ERROR“ LED will light up. RESAMPLING Resampling is a mighty feature for the transformation/restoration of jittered signals into high-quality signals. As well, the signal quality of 44.1 or 48 kHz sources can be improved by converting them to a higher rate. This also complies to the USB input which often suffers from jitter caused by improper treated computer outputs.
- OFF lights up when the resampling function is deactivated. The digital input word is forwarded to the D/A converter without alteration. - x1 The yellow “x1“ LED indicates that the resampling function is activated. The digital input word will be recombined and forwarded to the D/A converter at original sample rate. - x2 The yellow “x2“ LED indicates that the resampling function is activated. The digital input word will be recombined and forwarded to the D/A converter at twice the original sample rate.
THE VOLUME CONTROL Analog output level is set by means of the "VOLUME“ control. Level control as such is effected within the D/A converter for both channels simultaneously by digital processing. Therefore, no noise, no scratching, no crosstalk or gang errors can occur at all. Control accuracy is 0.5 dB over a 120dB range. Since the control affects data word length (and so: signal accuracy), a setting closest possible to the right end stop should be chosen for the maximum desired loudness.
Of course, all these settings are effected on the "active" side of the circuitry, thus leaving output impedance completely unaffected. By means of the active analog output adaptation to external conditions, there are only negligible effects on overall performance... if at all ! Furthermore, analog output level is controlled by means of a potentiometer on the front panel. Its setting is translated in the digital domain only, thus excluding any kind of scratching, crosstalk or gang errors.
resampling module generates auxiliary clock signals needed for further processing of the digital signal within the unit. After the resampling stage, an AES/EBU- (or S/P-DIF-) encoded PCM signal is sent to the rear digital output, while the data contents and auxiliary clocks are fed to the digital-to-analog converter. The D/A converter comprises a digital filter, the volume control, the stereophonic converter as such, as well as the analog output filters.
DISMANTLING / JUMPER SETTINGs Hint: Here we are talking about internal adjustments inside your HPA V181. You are in need of two screw drivers TORX style size T8 and T10. You should by all means PULL THE MAINS PLUG !!! Only thereafter the settings can be altered without any hazard. DISMANTLING As the 4-pin XLR socket is fixed to the back side of the front panel, the front panel may NOT be disassembled !! To avoid damages please follow the instruction below: 1.
JUMPER SETTING DAC V800 21
TECHNICAL DATA DAC V800 All Measurement RMS unwtd., 20 Hz - 20 kHz, Sample-rate 48 kHz, digital level = 0 dBFs, analog output level = +15 dBu, Resampling set to x1, as not otherwise noted Digital Inputs: Digital Input Formats: Input Sample Rates: Analog Frequency Range : THD (k2 … k10): Dynamic Range (A-wtd): Crosstalk (@ 1 kHz): Crosstalk (@15 kHz): Bal. Analog Outputs: Bal. Analog Output Level: Output CMRR(@ 15 kHz): Output Impedance: Unbal. Analog Outputs: Unbal.
EU CONFORMITY STATEMENT: We herewith declare that the following unit Name: VIOLECTRIC DAC V800 Serial No.
WARRANTY Since 1986 we are constructing and manufacturing sophisticated electronics for ambitious customers. Since the early beginnings we are trying hard by accompanying measures, the use of 1st choice components and multiple quality checks during production to avoid faults at large. We are quite effective in that and this is – amongst others - why we enjoy such a good reputation. Despite all accurateness faults may occure which may derogate the proper operation of your product.
