That makes sense. Oh, and I discovered that in Cal 02, vertical calibration, the 2465 is NOT put into 50 Ohm DC input mode. It is in high impedance mode. So my voltages are not being divided by 2. So now I don't know what the heck is causing the Limit errors. Sigh. Could it be that my square waves low side is not exactly at 0V? It's hard to get it exactly right on my PSG9080 signal generator. I'm using another scope to set the high and low levels as close as I can, but they interact and I can rarely get them both exactly right. Close though, within 10s of mV.
