User Manual

Performance Ver
ification
Differential Signal Range
This procedure directly verifies the differential signal range and indirectly verifies the common-mode signal range. This
procedure uses the setup from the previous test.
Verification
42 V Range (÷ 50).
1. Set the probe to the 42 V range (÷ 50), DC reject off, and full bandwidth.
2. Set the input voltage on the DC source to 0 V, and verify that it is 0 V with the m ultimeter.
3. Measure the probe output voltage as V
offset
. You will use this offset voltage to acquire accurate results in the calculations
below.
4. Set the input voltage on the DC source to 42 V ±100 mV, and record the actual voltage as V
in
.
5. Measure and record the output voltage as V
out
.
6. Calculate attenuation as |V
in
÷(V
out
–V
offset
)|.
7. Verify that the attenuation is in the range of 47.5 to 52.5. Record the results in the test record.
8. Reverse the Y-lead connection on the probe to reverse the polarity of your following measurements.
9. Measure and record the output voltage as V
out
.
10. Calculate attenuation using the formula in step 6.
11. Verify that the attenuation i s in the range of 47.5 to 52.5. Record the results in the test record.
4.25 V Range (÷ 5).
12. Reverse the Y-lead connection on the probe (back to: red to +, black to –).
13. Set the DC source to 4.25 V ±10 mV, and record the actual voltage as V
in
.
22 P6250 & P6251 Technical Reference