Hi - I'm (re)-evaluating our stock of ADC200 units for outcurrent range of systems, and have a question...I'm probably jsut doing something wrong...
When measuring a RF wave form (our typical range is 800Khz - 2MHz) I cannot seem to get accurate Peak-To-Peak measurements - either using the cursors or via the add-in measurement.
I have a 200V setpoint on the RF, and am measureing through a 100x probe (set correctly in Picoscope) yet my PtP measurement always seems to come in about 20% less than actual. I have confirmed the test device is giving 200V PtP on a benchtop scope, yet two different ADC200s both give identical results. Frequency measurements are spot on - yet PtP always seems low - even on a DC pulse (~4uS timescale, interval 34uS). I have also tried 2 other RF sources, and different apmplitudes but no success.
I am wondering if the ADC200/50 is underpowered for this type of measurement (maybe bandwith/sampling rate is too low?) or if I've just set something up incorrectly !
I have attached a picture to illustrate.
Thanks in advance