Performance verification
DC Offset test
This test verifies the DC offset accuracy of the arbitrary function generator.
This test uses a 50 Ω terminator. It is necessary to know the accuracy of a 50 Ω
terminator i
n advance of this test. This accuracy is used for as a calibration factor.
1. Connect the 50 Ω terminator to the DMM as shown in the following figure
and measure the resistance value.
Figure 6: 50 Ω terminator accuracy
2. Calculate the 50 Ω calibration factor (CF) from the reading value and record
as follows:
CF (Calibration Factor) = 2 / (1 + 50 Ω / Measurement Ω)
Measurement (reading of the
DMM)
CF
Ω
Examples
50.50 Ω 1.0050 (= 2 / (1 + 50 / 50.50))
49.62 Ω 0.9962 (= 2 / (1 + 50 / 49.62))
3. Connect the arbitrary function generator to the DMM as shown in the
following figure. Be sure to connect the 50 Ω terminator to the arbitrary
function generator Output connector side.
54 AFG3000C and AFG3000
Series Specifications and Performance Verification
Fig
ure 7: DC offset tests
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