1.343 Vrms = 2.555 dbV, how? using the digital analyzer HP3561

Discussion in 'General Electronics Chat' started by tuan.le007, May 3, 2017.

  1. tuan.le007

    Thread Starter Member

    Nov 29, 2016
    46
    1
    I have the hp 3561a dynamic signal analyzer.
    using the function
    LINEAR, I measured 1.343 Vrms
    using LOG, I measured 2.555 dbV.
    Can someone explain to me how this work?
    formulas and calculations would help. I need to convert this in my code in order to measure 1.343 on the display.
    It is showing 2.5555 dbV right now.

    thanks
     
  2. Papabravo

    Expert

    Feb 24, 2006
    11,703
    2,464
  3. crutschow

    Expert

    Mar 14, 2008
    20,042
    5,639
    dBV is the voltage in dB relative to a 1V reference.
    That's shown in the equation in PB's post.

    To convert dBv to volts, you use the inverse equation:
    10^(2.56dBV/20)= 1.343V
     
  4. tuan.le007

    Thread Starter Member

    Nov 29, 2016
    46
    1
    thank you so much!
     
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