Tektronix AFG2021 Technical Reference page 40

Performance verification
Center Frequency
100 kHz
Function Frequency
sine 20.00 kHz
reading (dBm)
reading - reference Bn =
An - A1 (dBc)
Cn = 10 Bn/20
30
c. Push the Frequency bezel button (it will turn dark when activated) and
use the numeric keypad or general purpose knob to set the frequency to
20.00 kHz.
d. Push the
e. Push the Amplitude/Level Menu bezel button.
f. Push the -more- bezel button.
g. Push the Units bezel button and then push the Vpp bezel button to change
the voltage units to Vpp.
h. Push the -more- bezel button.
i. Push the Amplitude bezel button (it will turn dark when activated) and
use the numeric keypad or general purpose knob to set the amplitude
to 1.00 Vpp.
j. Check that the Channel On/Off front panel button LED is lit.
If it is not lit, then the channel output is off. Push the Channel On/Off
button to turn it on.
3. Set up the spectrum analyzer according to the following table:
Span
200 kHz
4. Set the Ref Level of the spectrum analyzer to 8 dBm.
5. When the THD cannot be measured directly, it is obtained by using the
following calculation:
6. Measure and record each level (A1 to A7) to the seventh harmonics of the
20 kHz sine wave.
7. Calculate the each B1 to B7, C1 to C7 value and the THD.
Measurement
Fundamental 2nd
=
reference
20 kHz 40 kHz
A1 = A2 =
B1 = 0 B2 =
C1 = 1 C2 =
AFG2021 Arbitrary Function Generator Specifications and Performance Verification
button on the front panel to return to the top menu.
RBW
500 Hz
3rd 4th
60 kHz 80 kHz
A3 = A4 =
B3 = B4 =
C3 = C4 =
5th 6th
100 kHz 120 kHz
A5 = A6 =
B5 = B6 =
C5 = C6 =
7th
140 kHz
A7 =
B7 =
C7 =