Brief Introduction of Spectrum Analyzer

There are many functional control buttons on the panel of the spectrum analyzer, which can adjust and control the system function. The main function of the system is to show the spectral characteristic of the input signal in the frequency domain. Generally there are two kinds of spectrum analyzer according to the signal process mode: one is real-time spectrum analyzer, the other is sweep-tuned spectrum analyzer.

The Choice of the Scan Model: Sweep or FFT?

The scan model of the modern spectrum analyzer usually have both sweep model and FFT model. Under the circumstance of the narrow RBW, the FFT is faster than the sweep model, while if the RBW is wider, the sweep model is faster.
When the scan bandwidth is less than the analyze bandwidth of the FFT, the FFT model can measure the transient signal; when the scan bandwidth is over the FFT, if we choose the FFT model, it is possible to lose the useful signal. The spectrum analyzer will be distortion.

We also have products such as Arbitrary Waveform Generators,China Arbitrary Waveform Generators and so on.

What’s the Function of the Tracking Generator?

The tracking generator is the common implements of the spectrum analyzer. When the output of the tracking generator is connected with the input of the spectrum analyzer, the spectrum analyzer and tracking generator can form a completely sweep frequency measuring system. The signal frequency of the tracking generator can track the tuning frequency accurately. Spectrum analyzer matches with the tracking generator can be used as the analysis of network, such as the frequency response and insertion loss of the device.

Is that the RBW the smaller the better?

The sensitivity of the spectrum analyzer is related with the RBW. The smaller of the RBW, the better sensitivity of thespectrum analyzer. While it will slower the scan speed. We'd better set the RBM according to our practical test demand, then find the balance point between the sensitivity and speed, which can not only ensure the accurate measurements, but also get the fast measurement speed.

How to Gain the Best Sensitivity of the Spectrum Analyzer?

At first, we need to reset the central frequency, span and reference level according to the tested signal. Then under the circumstance of without overload reduce the pad value gradually. If the SNR is less than 15dB, we need to reduce the RBW. The less the RBW, the lower SNR of the spectrum analyzer, as a result, the higher sensitivity. What we need to pay attention, measuring result of the spectrum analyzer is the sum of the input signal and internal noise, in order to get the accurate result, the SNR needs to be over 20dB.

The Safety States of the Programmable DC Power Supplies

The programmable DC power supplies device has the dangers like high voltage, large current, please do not operate unless the relevant personnel. We can’t handle the electrical power package with the fire, or it will burst. Please do not open or damage the power supplier, the electrolyte has the strong poisonous and is harmful to our body. When we operate the programmable DC power supplier, we need to keep in mind of the tips above.

The Proper Use of the Spectrum Analyzer

We all know that the spectrum analyzer can be applied in many areas and plays a important part. We need to know more about it such as how to use it properly.
RBW represent the lowest difference of frequency width of two signal with different frequency that can be told apart. If the frequency width of two different frequency signal is lower than the spectrum analyzer RBW, the two signal will overlap. So the proper PBW width is the important concept for the proper using of the spectrum analyzer.

The Scan Tune Spectrum Analyzer

The most common spectrum analyzer is the scan tune spectrum analyzer. The modulated local oscillator generate the oscillation frequency with linear variation along time with the scan generator. The important parts which influence the signal reaction is the bandwidth of the filter. The feature of the filter is gaussian filter, function it influence is the analysis bandwidth during the measuration.