ADL8121 - IP2 testing method

Question

Please describe the testing setup for the IP2 data shown in the plot below. For example, at 8GHz, are two tones near 4GHz applied as inputs, or are two tones near 8GHz applied? And is the sum frequency used as the output tone?

enash · Accepted Answer

At 8 GHz on the plot, two tones are applied at 8.000 GHz and 8.001 GHz (i.e. 1 MHz carrier spacing). The power of each tone at the output is +5 dBm. The F1+F2 IMD2 product is measured at 16.001 GHz is measured. OIP2 = Po (dBm) - IMD2 (dBc) where IMD2 is negative.

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ADL8121 - IP2 testing method

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