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  1. #31

    : EMU 0404

    . . . 5 Hz 60KHz flat . -3db 94500KHz 0,017 . 0,007 80KHz C, 0,0004%. 0 dbV, 192KHz 24bit. 0,01 db DAC 3,5%. EMU Spectrum Lab ( win server 2003 - 64 bit). Lab view.
    ( ; . Spectrum Lab , . IMD , ).
    . .

  2. #32
    Supreme Member
    Mar 2009
    4,024

    Re: EMU 0404

    , "" ...

  3. #33

    : EMU 0404

    .
    EMU 0404 .
    ( ) ADC EMU 0404 DAC. , . . , .
    setup
    Spectrum Lab / 64bit Win server 2003 USB 2. 192/24 ( ). set up EMU 0404 Spectrum Lab.



    0db



    menu Spectrum Lab. , 0db , +1db



    DAC.

    n



    DAC ( ) EMU 0404. ( EMU). , , , .
    , Spectrum Lab Components ADC . , . Spectrum Lab Components



    ( … . ).

    :
    : Tek SG505 mod WQ SG505 mod WR, THD + IMD: Tek AA501A option 01 +02
    THD notch Tek 067 0938 00 calibration fixture
    Tek DC 5009 Tek DC 503A oven stability
    Tek DM 501A, Tek DM 5120 B&K2426, Tek 501 ( < 200V). Tek SC501. 569 pF ( D = 0,055), 1,4H ( Q = 0,03) 0,1ohm ( Gen Rad 1658).


    , :
    ) = 4,135 V ( 100 Kohm 1 KHz)
    ) = 1,4431 V ( 600 ohm 1 KHz)
    1,12 Kohm ( 50 - 2.000 Hz). ( ) EMU 0404. , 5 nF ( ), . .



    I) (S/N 1 KHz db RMS Average)
    S/N, 1KHz ( RMS Average ). 100 Kohm 600 ohm . :
    ) 100 Kohm Vmax 4,135V (0db)
    RMS
    - 67,7 db ( 300 KHz)
    - 86,2 db 80 KHz (low pass Butterworth)
    - 91,0 db 30 KHz (low pass Butterworth)
    - 92,2 db (30 KHz low pass 400 Hz high pass Butterworth)

    Average
    - 68,0 db ( 300 KHz)
    - 90,5 db 80 KHz (low pass Butterworth)
    - 94,5 db 30 KHz (low pass Butterworth)
    - 98,0 db (30 KHz low pass 400 Hz high pass Butterworth)

    ) 600 ohm Vmax 1,4431V (0db)
    RMS
    - 64,8 db ( 300 KHz)
    - 85,6 db 80 KHz (low pass Butterworth)
    - 90,9 db 30 KHz (low pass Butterworth)
    - 92,0 db (30 KHz low pass 400 Hz high pass Butterworth)

    Average
    - 66,2 db ( 300 KHz)
    - 89,9 db 80 KHz (low pass Butterworth)
    - 94,6 db 30 KHz (low pass Butterworth)
    - 98,4 db (30 KHz low pass 400 Hz high pass Butterworth)

    ) .

    10 Hz 95 KHz . 0,004% 0,001%. . ( ), , 1 ( ). , 10sec .



    ..........
    Attached Images Attached Images

  4. #34

    : EMU 0404

    ) .
    96 KHz . 96 KHz 300KHz , DAC 90kHz. 600 ohm, ( ). line EMU 0404, balanced 600 ohm .

    .

    ) 1V RMS 0 dbV 1KHz. ( 1V RMS 600ohm). 0404 ( ....1,0001V ). -3db 94.350 Hz DC ( ).



    -0,15 db 10 – 65.000 HZ 0,05db 50-50.000KHz.



    ) volume , (1,4431V RMS + 3,18db 1V RMS, 600ohm ). , EMU 0404, volume , 1,44V ( 600ohm) . cross calibration, EMU 0404 (. club), . ( 1V RMS). .





    IV)
    , ( ) 1V RMS (0dbV)





    1,4413V RMS (+ 3,18db)





    ( ) 80KHz :
    ) ( 30 KHz 80KHz ).
    ) 80 KHz .
    ) . . 70 KHz , 52 KHz. (300KHz) THD + ( 0,5 – 0,7 %) ( 0 – 300 KHz....... ).
    15 ( ). 93KHz ( ) . ( THD +N). 10 – 80.000 Hz THD + N 0,003 0,007 %. 1,4413V RMS (+ 3,18db), ( ) , .

    V)
    (SMPTE DIN)
    1:4 (12db) ( 0db Spectrum Lab). 600ohm

    IMD SMPTE
    ( 60Hz -2db 7KHz -14db)
    IMD 0,0039% 100 Kohm 0,0035% 600 ohm

    IMD DIN
    ( 250Hz -2db 8KHz -14db
    IMD 0,0041% 100 Kohm 0,0037% 600 ohm

    ....
    Attached Images Attached Images

  5. #35
    AVClub Addicted Member
    Dec 2006
    1,917

    : EMU 0404

    . . . HP .. line 1V RMS volume pot , THD-SNR-IMD, 404, + software gen & FFT, lab grade HP hardware;

    ..
    , software FFT. standalone hardware .

  6. #36

    : EMU 0404

    VI)
    CD player, HD player, . -70db. DAC ( bit) THD + N. , (< - 60 db) . dither . .



    Attached Images Attached Images

  7. #37
    AVClub Addicted Member
    Jun 2006
    2,914

    : EMU 0404

    dac low level linearity. "" datasheets dither?

    ?

    .


    If you decide to make one yourself, make it better than what already can be bought as it will be more expensive anyway

  8. #38

    : EMU 0404

    Salas
    . . . HP .. line 1V RMS volume pot , THD-SNR-IMD, 404, + software gen & FFT, lab grade HP hardware;

    ..
    , software FFT. standalone hardware .
    salas :
    .
    Hi - Fi . EMU 0404 , , ( ). . , . , , Tek EMU 0404 ( Spectrum Lab ARTA ). (0,238 Tek 0,28 EMU, Tek).







    – 90 db 10Hz – 80KHz. THD + N – 83 db, . ( ) .







    . – 40 db ( , ) – 48 db ( zoom , – 40 db).
    .
    Attached Images Attached Images

  9. #39
    AVClub Addicted Member
    Dec 2006
    1,917

    : EMU 0404

    . .

  10. #40

    : EMU 0404



    dac low level linearity. "" datasheets dither?
    THD + N ( , ). , data sheets , band pass low pass ( 1KHz) . . dither . EMU 0404 -75 db. band pass . , .



    EMU 0404, DAC A4396 () . THD + N .



    A4396, 192/24 - 60db - 51db ( 0,28 % 80KHz), - 51,057db ( data sheet AKM, ). 40KHz, THD + N 3db (- 54db), . 0404 , (buffer). EMU 0404 . (white noise ).

    , ( manual , , ..... - ). , . EMU THD + N , .

    EMU








    ?
    EMU , 13,33V RMS ( ), EMU 0404 1,443 V RMS, 19 db . -72db, 10mV, EMU ... 400V. 19db (EMU ) 13db THD . . EMU 400 – 1000 V. , (. 0,5 V) (. 1 ohm).

    . , .

    .
    Attached Images Attached Images

 

 

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