Performance verification
7. Calculate each B1 to B7, C1 to C7 value and the THD using the following
table.
NOTE. When all the harmonic components are -62 dBm or less, the calculation
of THD can be skipped because it is THD < 0.2%.
8. Verify that the THD is less than 0.2%.
9. (Two channel models only) Repeat steps 2 through 4 for the channel 2 output.
AFG3xxxx Measurement
Function Frequency Fundamental
=
reference
2nd 3rd 4th 5th 6th 7th
sine 20.00 kHz 20 kHz 40 kHz 60 kHz 80 kHz 100 kHz 120 kHz 140 kHz
reading (dBm)
A1 = A2 = A3 = A4 = A5 = A6 = A7 =
reading - reference Bn =
An - A1 (dBc)
B1 = 0 B2 = B3 = B4 = B5 = B6 = B7 =
Cn = 10 Bn/20 C1 = 1 C2 = C3 = C4 = C5 = C6 = C7 =
THD = Limit
<0.2%
Sample: reading
1.5 dBm -58.5 dBm -58.5 dBm -63.5 dBm -58.5 dBm -63.5 dBm -63.5 dBm
reading - reference
0 -60 dBm -60 dBm -65 dBm -60 dBm -65 dBm -65 dBm
Cn =
1.000 0.001 0.001 0.000562 0.001 0.000562 0.000562
0.1987%
Limit
<0.2%
AFG3000C and AFG3000 Series Specifications and Performance Verification 63
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