User`s guide

1-58
Making Measurements
Measuring Amplifiers
Figure 1-47 Gain Compression and 2nd Harmonic Output Level
Understanding Harmonic Operation
Single-Channel Operation You can view the second or third harmonic alone by using
only one of the analyzer’s channels.
Dual-Channel Operation To make the following types of measurements, uncouple
channels 1 and 2, and switch on dual channel.
• The analyzer measures the fundamental on one channel while measuring the second or
third harmonic on the other channel.
• The analyzer measures the second harmonic on one channel while measuring the third
harmonic on the other channel.
• Using the feature, the analyzer measures the fundamental on
channel 1 while measuring the second or third harmonic in dBc on channel 2.
• Using the feature, the analyzer couples power between
channels 1 and 2. This is useful when you are using the D2/D1 to D2 feature because
you can change fundamental power and see the resultant change in the harmonic
power.
The analyzer shows the fundamental frequency value on the display. However, a marker in
the active entry area shows the harmonic frequency in addition to the fundamental. If you
use the harmonic mode, the annotation H=2 or H=3 appears on the left-hand side of the
display. The measured harmonic cannot not exceed the frequency limitations of the
network analyzer's receiver.
COUPLED PWR ON off
COUPLED PWR ON off