Re: 7A18 option1?

 

I have one of these 7A18 with the offset pot in place of the trace identify button. But mine has an "option 6" label on the top. It also has an additional position on the input switch. Instead of the usual "AC GND DC" it also has a "DC Offset" position added to the usual switch positions. The offset pot is 10 turns and indeed offsets a DC component of the input signal so that you can bring the trace back on screen when it has a DC offset, but you don't want to use the "AC" position and limit the low frequency response, much like the 7A13 or the 7A22 does. However it doesn't have a way to measure the offset or is it calibrated.
Bill

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