Keysight Technologies N9321C, Руководство пользователя

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Functions and Measurements
Making a Power Measurement with USB Power Sensor
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Making an Average Power Measurement
The average power measurements provide a key metric in
transmitter performance.
Base station transmit power must be set accurately to achieve
optimal coverage in wireless networks. If the transmit power is set
too high due to inaccurate power measurements, undesired
interference can occur. If the transmit power is set too low,
coverage gaps or holes may occur. Either case affects system
capacity and may translate into decreased revenue for service
providers. Average power can be measured for the channel of
interest while the base station is active. All other channels should
be inactive. Average power is a broadband measurement. If other
signals are present the analyzer will also measure their power
contributions.
Figure 3-25Connection with base station
To make an average power measurement, you connect the power
sensor and cable, zero and calibrate the meter, before making a
measurement. Zeroing of the power meter will occur automatically:
• Every time you use the Power Meter.
• When a 5 degree C. change in temperature occurs.
• Whenever you change the power sensor.
• Every 24 hours.
• Before measuring low level signals—for example, 10 dB above the
lowest specified power for your power sensor.