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OWNERS MANUAL FOR WEISS DAC202 D/A CONVERTER

Page

22

Date: 03/10

XLR selected as sync source: XLR signal goes to Firewire.
RCA selected as sync source: RCA signal goes to
Firewire.
Toslink selected as sync source: Toslink signal goes to
Firewire.
Internal or WC BNC or 1394 bus selected as sync source:
The Firewire output is muted.

Mode: Firewire input / single wire / insert active

- 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.
RCA selected as sync source: RCA signal goes to
Firewire.
Toslink selected as sync source: Toslink signal goes to
Firewire.
Internal or WC BNC or 1394 bus selected as sync source:
The Firewire output is muted.

- The DAC chip is fed from the source selected in the
Insert mode menu, i.e. from either the XLR or RCA or
Toslink input.

Mode: Firewire input / dual wire / no insert

- The Firewire input is routed to: DAC chip, XLR out (left
channel), RCA out (right channel), 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 is the left channel
signal going to Firewire and RCA is the right channel
signal going to Firewire.
RCA selected as sync source: RCA is the left channel
signal going to Firewire and XLR is the right channel
signal going to Firewire.
Toslink selected as sync source: Not supported.
Internal or WC BNC or 1394 bus selected as sync source:
The Firewire output is muted.

Mode: Firewire input / dual wire / insert active

- The Firewire input is routed to: XLR out (left channel),
RCA out (right channel), 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 is the left channel
signal going to Firewire and RCA is the right channel
signal going to Firewire.
RCA selected as sync source: RCA is the left channel
signal going to Firewire and XLR is the right channel
signal going to Firewire.
Toslink selected as sync source: Not supported.
Internal or WC BNC or 1394 bus selected as sync source:
The Firewire output is muted.

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Содержание DAC202

Страница 1: ...Weiss Engineering Ltd Florastrasse 42 8610 Uster Switzerland www weiss highend com DAC202 OWNERS MANUAL...

Страница 2: ...esearch and development process Research was conducted both in analog and digital circuit design as well as in signal processing algorithm specification On the following pages I will introduce you to...

Страница 3: ...ed digital and analog audio concepts explained 6 Jitter Suppression Clocking 7 Upsampling Oversampling and Sampling Rate Conversion in General 9 Reconstruction Filters 10 Analog Output Stages 10 Dithe...

Страница 4: ...es the Gambit Series was launched taking ergonomics and sonic quality to new heights The Gambit Series consists of stand alone units like Equalizer Denoiser Declicker Dynamics Processor A D converter...

Страница 5: ...f one of the first digital equalizers 1989 Introduction of one of the first digital dynamics processors 1991 Introduction of the Ibis digital mixing console built for the mix down of classical music 1...

Страница 6: ...ove then there is the D A Converter where the same mechanism as in the A D Converter applies and the third is the Asynchronous Sample Rate Converter ASRC The ASRC is not something usually found in Hi...

Страница 7: ...4 1kHz in the case of a CD But the PLL should not follow the short term fluctuations jitter Think of the PLL as beeing like a very slow reacting flywheel In the DAC202 we employ a two stage PLL circui...

Страница 8: ...with the help of a low pass filter which cuts off the frequencies above 22 05kHz In practice such a filter has a limited steepness i e if it suppresses frequencies above 22 05kHz it also suppresses f...

Страница 9: ...n audio D A converter chips have such an upsampler or oversampler already built into the chip One particular chip for instance upsamples the signal by a factor of eight i e 44 1kHz ends up at 352 8kHz...

Страница 10: ...c distortions at low levels but which nonethless cause the audio to sound harsh and unpleasant The harmonic distortion is generated because the eight bits which are cut off from the 24 bits are correl...

Страница 11: ...if the upsampler generates a word length of more than 24 bits it should be dithered to 24 bits for maximum signal fidelity I hope these excursions into the theory and practice of audio engineering ha...

Страница 12: ...A connectors for analog audio output One XLR and one RCA connector for AES EBU and S PDIF audio output One inch jack socket for headphones Backpanel elements from left to right Analog outputs on XLR a...

Страница 13: ...lf the sampling rate i e 88 2 or 96 kHz Frontpanel elements Standby LED IR Receiver Headphone socket LCD display Rotary encoder with switch Insert mode If the insert mode is activated an external digi...

Страница 14: ...trol Power Supply A powerful non switching power supply is used All sensitive voltages have their own regulators Remote Control The IR remote control allows to control the following parameters Power o...

Страница 15: ...as a steeper frequency response than B Future DAC202 software will offer more filter choices All DAC202 units can be software updated via Firewire Operation Installation Unpacking and Setup of the DAC...

Страница 16: ...the volume in dB deciBel is shown a value of 0 0 is maximum volume Below the dB figure there is a bar which also represents the volume In the upper right corner the polarity is shown with the Greek ch...

Страница 17: ...alid signal at the AES EBU input thus it shows unlocked The Options Menu explained Upon entering the Options Menus the display as shown here appears The highlighted item is the one which can be change...

Страница 18: ...ally via Firewire With the other inputs the source e g a CD transport has to by synchronized via e g the sync out BNC connector at the back of the DAC202 4 Sync Rate Depending on the Sync Source selec...

Страница 19: ...If bypassed the volume knob and the remote control volume work only on the headphone output The main outputs are set to full volume 0 0 dB This mode is used if there is another volume control used in...

Страница 20: ...rate as the file played has If the two rates do not match then there is a sampling rate conversion going on and bit transparency can not be achieved When this is all fine play the file and activate t...

Страница 21: ...insert an external processing stage into the audio stream e g a digital equalizer The secondary input so called insert return is selected within the config menu Each basic mode can be operated in eith...

Страница 22: ...DAC chip XLR out left channel RCA out right channel 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 is t...

Страница 23: ...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 Mode AES XLR input dual wire no insert The XLR input left channel...

Страница 24: ...k input the WC BNC input the 1394 bus or the internal sync generator Mode S PDIF RCA input dual wire insert active This mode is not supported Mode S PDIF TOS input single wire no insert The TOS input...

Страница 25: ...are routed to DAC chip XLR out left channel RCA out right channel Firewire out APB The Firewire input and RCA inputs are not routed anywhere The sync source can be specified as the XLR input the RCA...

Страница 26: ...t 1 From the mounted drive double click WeissFirewire 3 3 3 3586 pkg the version numbers can be different of course 2 Click Continue 3 Select the drive usually you leave it at the defaults 4 Click Con...

Страница 27: ...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 Operation Mode determin...

Страница 28: ...DAC202 s internal clock generator Sampling Rate The sampling rate of the device when internally clocked When clocked synching to one of the other interfaces XLR RCA TOS the sampling rate indicated re...

Страница 29: ...Bu 4 15Vrms with a 0dBFS sinewave input 7 74 dBu 2 12Vrms with a 0dBFS sinewave input 2 72 dBu 1 06Vrms with a 0dBFS sinewave input RCA output 14 44 dBu 4 075Vrms with a 0dBFS sinewave input 8 57 dBu...

Страница 30: ...Fs 44 1kHz Filter A 0Hz 20kHz within 0 1dB Fs 44 1kHz Filter B 0Hz 20kHz within 1 1dB Fs 88 2kHz Filter A 0Hz 20kHz within 0 1dB Fs 88 2kHz Filter A 0Hz 40kHz within 0 7dB Fs 88 2kHz Filter B 0Hz 20k...

Страница 31: ...dBr 0 0000795 40 dBFS input level 122 dBr 0 0000795 70 dBFS input level Linearity at 0 to 120dBFS input level Less than 0 4dB deviation from ideal Spurious components including harmonics At 0dBFS inp...

Страница 32: ...CONTACT For any questions suggestions etc feel free to contact us at Weiss Engineering Ltd Florastrasse 42 8610 Uster Switzerland Phone 41 44 940 20 06 Fax 41 44 940 22 14 Email weiss weiss ch Web htt...

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