Apr 03, 2014 - 11:43 AM
Even though uScope does not have a built-in AC Input Coupling (it only has DC) it can still be used to test an "AC Sensor".
As you may know, when a scope is set to AC input coupling all of the steady voltages are eliminated in the signal and are displayed as 0 volts. When using AC input coupling, the scope will only display the always changing portions of the signal.
DC input coupling will show all aspects of a signal: If the signal is truly an AC signal it will display as such. If the AC signal is riding on a DC voltage, such is the case of many AC speed sensors, you will see the DC and the AC combined which is important for accurate analysis.
If you want to view the AC portion of the signal use the AES AC filter adapter:
AC Pass Filter Adapter (AES# 03-90-u): http://www.aeswave.com/AC-Pass-Filter...