DVM_Bal & DVM_Single | Difference?

Thread Starter


Joined Jul 30, 2020
Hey guys

I have been given a task where I must measure VAC on a testpoint for a speaker. To do this I must attach a filter, as shown below:


Where AT32 indicates SPK-P and AT33 indicates SPK-N

The first figure indicates, I must use DVM_BAL. I am only familiar with DVM_Single. Can any of you guys please explain to me, what the key difference is?

I am using a 34980A Multifunction Switch, from which I use the following module below with a 50-Pin D-Sub Male connector.

Please help me out. I am only familiar with the DVM_Single, that I use i.ex. to measure some resistance, VDC or similar.