Diagram Of Gain Compression; Swept Power Measurement Of Amplifier's Fundamental Gain Compression And 2Nd Harmonic Output Level - HP 8753E User Manual

Figure 6-86 illustrates a simultaneous measurement of fundamental gain compression and
second harmonic power as a function of input power.
Swept Power Measurement of Amplifier's Fundamental Gain Compression and 2nd
In a compression measurement it is necessary to know the RF input or output power at a
certain level of gain compression. Therefore, both gain and absolute power level need to be
accurately characterized. Uncertainty in a gain compression measurement is typically less
than 0.05 dB. Also, each input channel of the analyzer is calibrated to display absolute power
(typically within +0.5 dBm up to 3 GHz, and + 1 dB up to 6 GHz).
Figure 6-85. Diagram of Gain Compression
G A I N
I
I I
S T A R T - 5 . 0
c w i 2 0 0 . 0 0 0 0 0 0 HHZ
N A G
I I I
- 5 . 0 dBm
c w 1 2 0 0 . 0 0 0 0 0 0 MHZ
START
Figure 6436.
Harmonic Output Level
REF 10
I
I
I
STOP 1 0 . 0 dBrn
R E F - 3 0 dB
I I I
I
STOP 1 0 . 0 dBm
Application and Operation Concepts
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