Saluki S3331 handheld spectrum analyzer is designed for field use. It has a low weight, compact structure and a good performance. S3331 spectrum analyzer has many functions, including continuous signal measurement, N dB bandwidth measurement, channel power measurement, occupied bandwidth measurement, weak signal capture, harmonic distortion measurement, etc.. In this section, we mainly show the operation of harmonic distortion measurement.
Following example uses a signal generator and generates a 300MHz, -10dBm continuous signal.
1) Connect the signal generator output port to S3331 RF test port.
2) Press [Preset] key to return the instrument to default status.
3) Set test frequency:
l Press [FREQ] key
l Select [Start FREQ] and input 200MHz
l 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.
l Press [Peak] key, S3331 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.
l Press [Marker] key
l Select [Delta], a Marker 2 is activated and it is a Delta marker, the reference marker is Marker 1.
l Press [Peak] key. Then Marker 2 will be located to the second harmonic. Read out the frequency and amplitude difference.
l Press [Peak] key and select [Next Peak], then marker 2 will move to the third harmonic. Read out the frequency and amplitude difference.