Example 6: Gain Compression Measurement Measurement Examples
7-16 PN: 10585-00001 Rev. P ML2437A/38A OM/PM
Your Measurement screen will now display the following:
Note the small signal gain of the amplifier. Now increase the signal source power slowly.
When the amplifier begins to compress the displayed gain will start to decrease. Increase the
source power until the gain has dropped by 1 dB, in this example to 19 dB.
Channel 2 now shows the input power at which the amplifier is in 1 dB compression. To
display the amplifiers output power at 1 dB compression, press [Channel]
> [Setup] > [Input]
and select Input A.
The above routine can be simplified by defining the A/B small signal gain reading to be 0.00
dBr.
Return the source to –30 dBm. Now set the A/B display of gain to 0 dB by pressing [Channel]
> [Rel 1].
Increase the power of the signal source until the display reads –1.00 dBr. The amplifier is
now at its 1 dB compression point. Input and output powers at 1 dB compression can be
viewed as before.
Figure 7-24.
Figure 7-25.
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