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The 8483A from Keysight Technologies is a Power Sensor with Frequency 100 kHz to 2 GHz, Power Range -30 to +20 dBm (1 uW to 100 mW). More details for 8483A can be seen below.
TVAC compliant USB and LAN Power Sensor
10 MHz to 8 GHz Three-path Diode Power Sensors
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