11. I went through all the adjustment procedures I could, considering the equipment I have. The vertical calibration of my unit always was was out of specification, so I decided to correct this also. I had a mixed signal board I made some time ago with MCU, DAC and OPAMPs on it, able to give 10V peak to peak amplitude on it's output. I made a resistor network in order to have 10V, 5V, 2V, 1V, 500mV, 200mV, 100mV 50mV and 20mV out of it. I hooked my Agilent U1272A DMM to this in order to be able to correct the amplitude for best possible accuracy. I went through the vertical and trigger adjustment procedure, and finally my vertical cursors began to show exactly what they should show. Here's my setup.