Medical MRI3T Power Measurement Kit
11
Directional Power Sensor (DPS) Measurements
Figure 8 Directional Power Sensor
The 5014 can be used to measure:
Forward Power
Reflected Power
Match Measurements
Sensor Temperature
Average Power
Average power is a measure of the equivalent “heating” power of a signal, as
measured with a calorimeter. It measures the total RF power in the system, and
does not depend on number of carriers or modulation scheme. The WPS is a
broadband sensor that measures power across its entire frequency range. Its
diodes operate in their ‘square law’ region so that the detector output is directly
proportional to the average power, without any additional error correction.
Average power is the most important measurement of any transmission system
since the average power is normally specified on the operating license. It is also
valuable as a maintenance tool, showing overall system health, and for
calibration.
Figure 9 Average and Peak Envelope Power - Square Wave Signal
Average Power
Peak Envelope Power
0 W
50 W
100 W
