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The E9304A from Keysight Technologies is a Power Sensor with Frequency 9 kHz to 6 GHz, Power Range -60 to +20 dBm (1 nW to 100 mW). More details for E9304A 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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