Ceyear 4051 Series, User Manual

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4. Operating Instruction
4.2 Advanced operation guide
99
distortion signal generated in the analyzer. In this section, the input signal generated by the signal generator is
used to explain whether the analyzer produces harmonic distortion.
Step 1. connect RF output of the signal generator to the input port of the analyzer.
Step 2. set an output dot frequency signal of the signal generator with frequency of 200 MHz and
amplitude of 0 dBm.
Step 3. set the analyzer as spectrum analysis mode:
 Press
【
Mode
】
and [Spectrum].
Step 4. set center frequency and frequency span of the analyzer:
 Press 【 Preset 】 .
 Press
【
Frequency
】
, [Center Freq] and enter 400 MHz.

Press 【 Span/X Axis 】 , [Span] and enter 500 MHz.
It can be seen from the trace of the analyzer that the harmonic distortion generated by the signal has 200 MHz
frequency offset from the original signal of 200 MHz, as shown in Fig. 4.15.
Fig. 4.15 Observe harmonic distortion
Step 5. set center frequency of the analyzer to the position of the first harmonic distortion:
 Press 【 Peak Search 】 and [Next Peak].
 Press
【
Marker →
】
and [Marker → Center Freq].
Step 6. set frequency span as 50 MHz and reset center frequency:
 Press 【 Span/X Axis 】 , [Span] and enter 50 MHz.
 Press
【
Marker →
】
and [Marker → Center Freq].