Can a logic analyzer measure ±9V?

Discussion in 'General Electronics Chat' started by bumclouds, Oct 19, 2012.

  1. bumclouds

    Thread Starter Active Member

    May 18, 2008
    82
    0
    Hi folks,

    Can a logic analyzer be used to measure an RS-232 ±9V signal? I'm expecting to see output on the logic analyzer, but I see none.

    I'm using this thing: http://www.saleae.com/logic.

    Thanks!

    -Andrew
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    The logic analyzer that you used the logic accepts voltages from -0.5V to 5.25V.

    You can use 2 resistors to divid and reduce the voltage from rs232 to the logic alalyzer.

    You also can use max232 to do that, or use transistors.
     
Loading...