S820E Microwave Site Master™ User Guide : High Accuracy Power Meter : General Measurement Setup Connection
General Measurement Setup Connection
Refer to the label on the USB sensor for information on frequency range and dynamic range.
External USB Sensor Connection Setups
Connection and Offset
1. Connect the source to be measured to the USB sensor. Use any required external attenuation or gain so the expected power level is within specification for the sensor.
2. Press Amplitude then Offset Value. Enter an offset value for any external attenuation (negative value) or external gain (positive value). The displayed power is adjusted by the offset value.
As an example, a power source around 1 Watt (30 dBm) may cause damage to some sensors. 10 dB of in‑line external attenuation will bring the power level down to approximately 100 mW, within the sensor range. Adding an Offset Value of –10 dB will remove the external attenuation from the displayed power level resulting in the correct power value being displayed on the analyzer.