Teledyne LeCroy DA1855A - Manual (Page 48)

DA1855A Differential Amplifier
42 922258-00 Rev A
When viewed at 500 m/div, the same 400 V square wave shows the probe compensation to be
slightly overpeaked.
Figure 5
When the time/div is decreased to value normally used to view 20 to 150 kHz switchmode power
conversion circuits, the slightly peaked LF compensation appears as a DC level shift.
Figure 6
Viewing a power FET’s saturation voltage with the slightly peaked LF compensation makes the
voltage appear to go negative. In this example the repetition rate of the power supply is 60 kHz.