The Spectrum Application (RF Measurements)
R&S
®
FPL1000
121
User Manual 1178.3370.02 ─ 09
7.2.3.1
About the Power Sweep Compression Point Measurement
The compression point refers to the power level at which a power-converting device
deviates from a linear input to output relation. The compression point of an amplifier
defines the upper limit of its dynamic range. Using an optional internal generator, the
R&S
FPL1000 can perform a power sweep to determine the compression point of a
device under test.
In a power sweep compression point measurement, you use the internal generator sig-
nal as a reference input signal for your power-converting DUT. Then you compare the
DUT input to its output, which is measured at the RF input of the analyzer.
Figure 7-20: Test setup for compression point measurement using an internal generator
The compression point is defined as the power level at which the relationship between
the input power and output power deviates from the linear trace. Various compression
points can be defined, depending on the amount of deviation. For example, the 1
dB
compression point indicates when the output power deviates from the linear response
by 1
dB.
Measurements and Results
