Dc Offset Test; Figure 5: 50 Ω Terminator Accuracy; Figure 6: Dc Offset Tests - Tektronix AFG2021 Technical Reference

DC offset test

AFG2021 Arbitrary Function Generator Specifications and Performance Verification
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 in advance of this test. This accuracy is used as a calibration factor.
1. Connect the 50 Ω terminator to the DMM as shown in the following figure
and measure the register value.
Figure 5: 50 Ω terminator accuracy
2. Calculate the 50 Ω calibration factor (CF) from the reading value and record
as follows:
CF (Calibration Factor) = 2
/
Measurement (reading of the
DMM)
Ω
Examples
50.50 Ω
49.62 Ω
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.

Figure 6: DC offset tests

4. Set up the arbitrary function generator as follows:
a. Push the More waveform button on the front panel.
b. Push the More Waveform Menu bezel button.
c. Push the DC bezel button.
(1 + 50 / Measurement
Ω Ω)
CF
1.0050 (= 2 / (1 + 50 / 50.50))
0.9962 (= 2 / (1 + 50 / 49.62))
Performance verification
25