Determining Power Levels - Agilent Technologies 8719D User Manual

Determining Power Levels

5. Switch on the booster amplifier.
6. Using a power meter, measure the output power from the coupled arm and the open port
of the coupler.
Depending on the power meter being used, additional attenuation may have to
Note
be added between the coupler port and the power meter.
7. Verify the gain of the booster amplifier. For example, if the analyzer output power level
was set to -20 dBm and the output power measured from the open end of the coupler was
-5 dBm, then the gain of the booster amplifier would be + 15 dl3.
8. Verify that the power measured in the previous steps is well within acceptable limits (less
than -10 dBm for the coupled arm, less than +43 dBm for the open port).
9. Estimate the maximum power level that will be needed to force the DUT into compression.
10. At the maximum estimated power level, determine if the maximum output power
from the coupled arm of the coupler will be higher than the acceptable limit. If so,
add the appropriate amount of attenuation that will keep the coupled output power
below -10 dBm and above -35 dBm.
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