1. Forum
  2. Usenet
  3. SCI.ELECTRONICS.DESIGN

  • scope babble

    From Jan Panteltje@21:1/5 to All on Sun Jul 28 11:18:00 2024
    scope babble:
    https://www.electronicdesign.com/technologies/test-measurement/oscilloscopes/article/55128416/evaluation-engineering-oscilloscopes-resolving-finer-detail

    Has interesting links, for example:
    Kester, W., Understand SINAD, ENOB, SNR, THD, THD+ N. and SFDR so You Don't Get Lost in the Noise Floor,
    Analog Devices, MT-003 Tutorial, p. 5.
    https://www.analog.com/media/en/training-seminars/tutorials/MT-003.pdf

    I am still happy with my 10 MHz Trio analog scope...
    And my RTL_SDR sticks to about 1.5 GHz..

    Anybody here use a 12 bit scope?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to Jan Panteltje on Sun Jul 28 12:50:21 2024
    Jan Panteltje <[email protected]d> wrote:
    scope babble:
    https://www.electronicdesign.com/technologies/test-measurement/oscilloscopes/article/55128416/evaluation-engineering-oscilloscopes-resolving-finer-detail

    Has interesting links, for example:
    Kester, W., Understand SINAD, ENOB, SNR, THD, THD+ N. and SFDR so You
    Don't Get Lost in the Noise Floor,
    Analog Devices, MT-003 Tutorial, p. 5.
    https://www.analog.com/media/en/training-seminars/tutorials/MT-003.pdf

    Not a bad discussion, thanks.

    A couple of nits. First, the correct definition of ENOB and full-scale
    signal depends on whether the signal is unipolar or bipolar, i.e. whether
    the DC is considered to be signal or merely an offset to keep the real (AC) signal in range.

    The definition used in the article is correct for AC-only signals like
    radio, but 9 dB too low for AC+DC signals like photocurrents.

    Second, AD is inconsistent in the way they quote data converter SNR—they sometimes conveniently forget the factor of sqrt(12).

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Sun Jul 28 15:14:45 2024
    On a sunny day (Sun, 28 Jul 2024 12:50:21 -0000 (UTC)) it happened Phil Hobbs <[email protected]> wrote in <v85eqd$3uf7i$[email protected]>:

    Jan Panteltje <[email protected]d> wrote:
    scope babble:

    https://www.electronicdesign.com/technologies/test-measurement/oscilloscopes/article/55128416/evaluation-engineering-oscilloscopes-resolving-finer-detail

    Has interesting links, for example:
    Kester, W., Understand SINAD, ENOB, SNR, THD, THD+ N. and SFDR so You
    Don't Get Lost in the Noise Floor,
    Analog Devices, MT-003 Tutorial, p. 5.
    https://www.analog.com/media/en/training-seminars/tutorials/MT-003.pdf

    Not a bad discussion, thanks.

    A couple of nits. First, the correct definition of ENOB and full-scale
    signal depends on whether the signal is unipolar or bipolar, i.e. whether
    the DC is considered to be signal or merely an offset to keep the real (AC) >signal in range.

    The definition used in the article is correct for AC-only signals like
    radio, but 9 dB too low for AC+DC signals like photocurrents.

    Second, AD is inconsistent in the way they quote data converter SNR—they >sometimes conveniently forget the factor of sqrt(12).

    Cheers

    Phil Hobbs

    Do I see it right that if you have a 12 bit scope and a 10 bit (1024 pixels) vertical screen resolution
    you could use the 2 least significant bits to color the trace (4 colors)?
    Gives you all the info... colored noise :-)

    BTW using the PC soundcard for low frequency signals gives you 16 bits....
    The color trick should work there too, 8 bits color is normal?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Cursitor Doom@21:1/5 to Jan Panteltje on Sun Jul 28 18:02:51 2024
    On Sun, 28 Jul 2024 11:18:00 GMT, Jan Panteltje wrote:

    scope babble:
    https://www.electronicdesign.com/technologies/test-measurement/
    oscilloscopes/article/55128416/evaluation-engineering-oscilloscopes- resolving-finer-detail

    Has interesting links, for example:
    Kester, W., Understand SINAD, ENOB, SNR, THD, THD+ N. and SFDR so You
    Don't Get Lost in the Noise Floor,
    Analog Devices, MT-003 Tutorial, p. 5.
    https://www.analog.com/media/en/training-seminars/tutorials/MT-003.pdf

    I am still happy with my 10 MHz Trio analog scope...
    And my RTL_SDR sticks to about 1.5 GHz..

    Anybody here use a 12 bit scope?

    I can beat that. I have several 2 bit scopes. :-)

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to Cursitor Doom on Sun Jul 28 21:22:16 2024
    On 2024-07-28 14:02, Cursitor Doom wrote:
    On Sun, 28 Jul 2024 11:18:00 GMT, Jan Panteltje wrote:

    scope babble:
    https://www.electronicdesign.com/technologies/test-measurement/
    oscilloscopes/article/55128416/evaluation-engineering-oscilloscopes- resolving-finer-detail

    Has interesting links, for example:
    Kester, W., Understand SINAD, ENOB, SNR, THD, THD+ N. and SFDR so You
    Don't Get Lost in the Noise Floor,
    Analog Devices, MT-003 Tutorial, p. 5.
    https://www.analog.com/media/en/training-seminars/tutorials/MT-003.pdf

    I am still happy with my 10 MHz Trio analog scope...
    And my RTL_SDR sticks to about 1.5 GHz..

    Anybody here use a 12 bit scope?

    I can beat that. I have several 2 bit scopes. :-)

    I have a couple of scopes in bits. That counts.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)