Power Meter Measurement Guide : High Accuracy Power Meter : General Measurement Setup
General Measurement Setup
Power values are displayed in both dBm and Watts. The Relative Power feature allows the display of power changes with respect to a desired reference value in both dB and % (percent). Limit values can be turned on as needed to indicate if a measurement is within or outside specified limits. Running Averages and a Max/Hold feature are also available.
The High Accuracy Power Sensor attaches to your instrument with the supplied cable.
The zeroing feature improves accuracy by removing measured system noise. Refer to Table: Power Range for Improving Accuracy via Zeroing to Remove Noise for the power range in which accuracy is improved. Calibration factors can be used to correct both efficiency and mismatch loss.
Power Range for Improving Accuracy via Zeroing to Remove Noise
Power Range
–20 dBm to –30 dBm
+ 3 dBm to + 13 dBm
MA24106A, MA24108A, MA24118A, MA24126A
–30 dBm to –40 dBm
MA24208A, MA24218A
–45 dBm to –60 dBm
MA24330A, MA24340A, MA24350A
–50 dBm to –70 dBm
Additional attenuators can be used to ensure that the power does not exceed the specified measurement range. The Enter Offset feature allows entering offset values for any cables and attenuators.
This measurement example uses an Anritsu PSN50 sensor and an attenuator for the high power measurement.
1. Connect the USB A/mini‑B cable between the sensor and your instrument.
2. Press the On/Off key to turn on your instrument.
3. Press the Shift key, then the Mode (9) key. Use the Up/Down arrow keys or rotary knob to select High Accuracy Power Meter mode and press Enter.
Changing the Display Units
The power reading can be displayed in dBm or Watts. Use the following procedure to change the displayed units:
1. Press the Amplitude main menu key.
2. Press the Units submenu key and select the display units.
3. Press the Back submenu key to return to the Power Meter menu.