Making A Power Measurement With Usb Power Sensor - Keysight Technologies N9322C User Manual

Functions and Measurements

Making a Power Measurement with USB Power Sensor

Making a Power Measurement with USB Power Sensor

C A U T I O N
N O T E
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The N9322C spectrum analyzer supports the U2000 and
U2020 series USB power sensors.
The U2000 Series USB power sensors do not need manual
calibration and zero routines performed. Calibration and
zeroing are performed without removing the power sensor
from the source, through internal zeroing. With internal
zeroing of U2000 Series USB power sensors, there is no need
to disconnect the sensor or power- off the DUT. The U2000
Series do not require 50 MHz reference signal calibration,
allowing the factory calibration to ensure measurement
accuracy. For best accuracy, users are recommended to
perform external zeroing for input signals below - 30 dBm for
best accuracy.
The maximum power for the RF IN port and the RF OUT port of the
analyzer is +30 dBm (1 W). The maximum power for the U2000 Series
Power Sensor port is +25 dBm (316 mW). When directly coupled to a
base station, the test set can be damaged by excessive power applied
to any of these three ports.
To prevent damage in most situations when directly connect an
analyzer to a base station, use a high power attenuator between the
analyzer and the BTS.
If you suspect other signals may be present, it is recommended that
you turn off all the other channels and measure average power only
on the signal of interest. Another option is to measure channel power
(which is less accurate), that filters out all other channels (signals).