Anritsu MP2110A BERTWave - Page 421

A.3 Sampling Oscilloscope
A-25
Appendix A
In this example, the difference between 1 level voltage (200 mV) and
offset voltage (50 mV) is 150 mV. At a scale of 50 mV/div for a voltage
difference of 150 mV, the amplitude accuracy is 8 mV. At 1 level accuracy,
the difference is calculated as follows:
200 × 2% + 8 = 12 ±12 mV
The difference between 0 level voltage (–200 mV) and offset voltage (50
mV) is 250 mV. At the 50 mV/div scale for a voltage difference of 250 mV,
the amplitude accuracy is 11 mV. At 0 level accuracy, the difference is
calculated as follows:
200 × 2% + 11 = 15 ±15 mV
Offset voltage
50 mV
Scale
50 mV/Div.
1 level
200 mV
0 level
–200 mV
Differences at offset values
250 mV
Differences at offset
values
150 mV
Amplitude
measurement value
400 mVp-p