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

 

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.