Hi, I just received a new 4444 from a reseller and I am trying to test it. a) With the 441 probe zeroed (130 μV rms at 10mV scale), measuring the square wave reference waveform shows a DC offset of 95mV at 5V scale. Should this be < 50mV (1% of full scale)? b) Is there a procedure to test whether/wh...