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OPERATING INSTRUCTIONS FOR GAMBIT ADC2 24Bit / 192kHz A/D CONVERTER

TECHNICAL DATA

Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster

Page 15

+41 1 940 20 06

+41 1 940 22 14

http://www.weiss. ch [email protected]

POW-R Noise Spectrum

Fig. 10 shows the noise spectrum of the three POW-R algorithms at 44.1 and 88.2 kHz.

Fig. 10 Output spectrum with 80dBFS / 1kHz sine wave, dithered to 16 Bits, using the three POW-R algorithms at 44.1kHz and
88.2kHz respectively

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Содержание GAMBIT ADC2

Страница 1: ... engineering ltd Florastrasse 42 8610 Uster Switzerland 41 44 940 20 06 41 44 940 22 14 http www weiss ch http www weiss highend com WEISS GAMBIT ADC2 OPERATING MANUAL Software Version 3 1 Firewire option update 22 7 2020 ...

Страница 2: ...ad circuitry and sidechain oversampling for mastering quality dynam ics processing Large bar graphs a well thought out push button array and uncluttered rotary knobs optimize handling ergonomics Summary of ADC2 features Inputs Two balanced LINE and two MIC inputs on sepa rate XLR connectors MIC input with switchable phantom power Input sensitivity is settable in each channel inde pendently or gang...

Страница 3: ...UCTION INTRODUCTION INTRODUCTION Daniel Weiss Engineering Ltd Florastr 42 CH 8610 Uster Page 3 41 1 940 20 06 41 1 940 22 14 http www weiss ch weiss weiss ch Outputs AES EBU on XLR in one or two wire format S PDIF on RCA Firewire Optional a kit is available DSP POW R dithering to 16 bits settable to three dif ferent algorithms according to the POW R stand ard SNR enhancement Level bar graph meter ...

Страница 4: ...channel 1 and channel 2 gain and threshold controls Additionally if ganged is active the com pressor limiter links 1 the sidechains of the two chan nels Typical applications for ganged mode are stereo left right recordings with two micro phones stereo insert limiting during mixdown or master ing If ganged is not active channel 1 and channel 2 settings are independent and the compressor limiter wor...

Страница 5: ...asure values above 0 0dBFS because of the internal floating point data format used in the digital signal processor This is very useful to set the output gain To clear the peak hold value double click the peak hold key Double click resets both input and output peak hold Input Gain If input gain is lit the rotary knobs control the ana logue input sensitivity This is adjusted in 1dB steps via a relay...

Страница 6: ...own in the input vs output graph in Fig 3 Fig 3 Compressor with 0 0dB Threshold To activate the limiter set the output gain to a posi tive value The boost will drive the signal into the lim iter The gain reduction applied by the limiter is visible on the yellow bargraphs To soften the transmission from linear to limiter seg ment the compressor can be activated by adjusting the threshold parameter ...

Страница 7: ...none of these two keys are lit the ADC2 uses inter nal sync POW r Dither To requantize the input signal from 24bit to 16bit format a special technique is used to avoid distortion called dithering Many dithering schemes are available today both professional and homebrewed The ADC2 uses the POW r scheme which is widely regarded as one of the best if not the best 2 and is used in a varie ty of digita...

Страница 8: ... Fig 7 shows a 24bit sine wave at 85dBFS truncated to 16bit Fig 7 1kHz Sine wave truncated to 16bit If the same sine wave is dithered instead of quantized the quantization distortion disappears and is replaced by wide band shaped noise which is more pleasing to the human ear Fig 8 Fig 8 1kHz sine wave dithered to 16bit To view the frequency characteristics of the three POW r algorithms refer to PO...

Страница 9: ... 2 DO3 RCA 44 1 kHz 44 1 kHz single wire 44 1kHz sin gle wire 44 1 kHz single wire 48 kHz 48 kHz single wire 48 kHz single wire 48 kHz single wire 88 2 kHz 44 1 kHz left channel 44 1 kHz right channel muted 96 kHz 48 kHz left channel 48 kHz right channel muted 176 4 kHz 88 2 kHz left channel 88 2 kHz right channel muted 192 kHz 96 kHz left channel 96 kHz right channel muted Table 2 AES OUT dual WI...

Страница 10: ...ace will be automatically configured such that it is slaved to the ADC2 output In the audio setup of your computer select the Weiss Firewire Interface as the recording and or playback device The recording path uses the ADC2 XLR output as input to the Firewire interface The playback path feeds the data coming into the ADC2 via Firewire directly to the RCA output connect or There are no ADC2 process...

Страница 11: ...ree on two XLR female connectors pin 2 hot Input Impedance 5kOhm 48V phantom power switchable AES EBU Input Input fs range 44 1kHz 48 0kHz 88 2kHz 96 0kHz 176 4kHz 192 0kHz All sampling frequencies must lie within 100ppm of the nominal sampling frequency Maximum Input Wordlength 24 Bits Connector XLR female Impedance 110 Ohm AES EBU Output Output fs range 44 1kHz 48 0kHz 88 2kHz 96 0kHz 176 4kHz 1...

Страница 12: ... 0kHz 88 2kHz 96 0kHz 176 4kHz 192 0kHz Maximum Output Wordlength 24 Bits Channel Status Data Professional format Connector RCA female Impedance 75 Ohm WORDSYNC I O Input Connector BNC female Input Impedance 75 Ohm Input Level TTL Output Connector BNC female Output Impedance 4 7 Ohm Output Level TTL Firewire Optional a kit is available Power Mains Voltage 110 220 Volts with voltage selector Fuse r...

Страница 13: ...Hz 30kHz 0 3dB fs 176 4kHz 20Hz 40kHz 0 3dB fs 192 0kHz 20Hz 40kHz 0 3dB THD N 1kHz less than 103 dBFS 3 dBFs output level unweighted SNR 40dBFS input 110dB unweighted Linearity t b d Crosstalk 120dB 0 20kHz CMRR 90dB 1kHz 80dB 20kHz 60dB 20Hz Interchannel phase tracking Better than 0 3 20Hz to 20kHz Latency sampling rate delay 44 1k 2 6 ms 48 0k 2 49ms 88 2k 1 8ms 96 0k 1 75ms 176 4k 1 4ms 192 0k...

Страница 14: ...8 4 6 4 4 4 2 4 0 3 8 3 6 3 4 3 2 3 0 2 8 2 6 2 4 2 2 2 0 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0 4 2 4 4 4 6 4 8 5 0 5 2 5 4 5 6 5 8 6 0 6 2 6 4 6 6 6 8 7 0 7 2 7 4 7 6 7 8 8 0 8 2 8 4 8 6 8 8 9 0 9 2 9 4 9 6 9 8 10 0 10 2 10 4 10 6 10 8 11 0 11 2 11 4 11 6 11 8 12 0 12 2 12 4 12 6 12 8 13 0 13 2 13 4 13 6 13 8 14 0 1...

Страница 15: ... 8610 Uster Page 15 41 1 940 20 06 41 1 940 22 14 http www weiss ch weiss weiss ch POW R Noise Spectrum Fig 10 shows the noise spectrum of the three POW R algorithms at 44 1 and 88 2 kHz Fig 10 Output spectrum with 80dBFS 1kHz sine wave dithered to 16 Bits using the three POW R algorithms at 44 1kHz and 88 2kHz respectively ...

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