Can the 4304A wattmeter measure 1.3 GHz?

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The 4304A wattmeter has a fixed plug-in element with a frequency range of 25-1000 MHz. The element is calibrated with the meter and is not interchangeable with other meters. To measure 1.3 GHz, you will need to use another meter such as the Model 43 or Wideband Power Sensors.

Please click here for more information on RF sensors that will measure 1.3 GHz:

Wideband RF Power Sensors