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18
Example
1)
Connect the signal generator output port to S3531 RF test port.
2)
Press
【
Preset
】
key to return the instrument to default status
3)
Set test frequency.
Press
【
FREQ
】
key
Select [Start FREQ] and input 200MHz
Select [Stop FREQ] and input 1GHz
The trace will be displayed as shown in the figure below. There are 3 peaks, signal, the second harmonic and the third harmonic.
4)
Use
【
Peak
】
and
【
Marker
】
keys to do the analyze.
Press
【
Peak
】
key, S3531 will search the MAX value and mark it with a marker 1. In this example, the marker 1 is
located at 300MHz and -10dBm signal which is the input signal.
Press
【
Marker
】
key
Select [Delta], a Marker 2 is activated and it is a Delta marker, the reference marker is Marker 1.
Press
【
Peak
】
key. Then Marker 2 will be located to the second harmonic. Read out the frequency and amplitude
difference.
Press
【
Peak
】
key and select [Next Peak], then marker 2 will move to the third harmonic. Read out the frequency
and amplitude difference.
Fig5-13: Harmonic Distortion Measurement
5.10
TOI Distortion Measurement
In following example, use 2x signal generator to generate a 500MHz, -10dBm Sine signal and a 501MHz, -10dBm sine signal.
Example
1)
Connect the outputs of two signal generators to the spectrum analyzer RF input port using a T-shaped connector, as shown
