test instruments with higher performance news

The most common  spectrum analyzer  is the scan tune  spectrum analyze r. 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.

At present, the  power supply  has a wide application. We need to know the suitable occasion and surrounding which need the  power supply  device. Here are some instrument for the power supply. The  power supply  needs to be installed in the aeration-dry indoor area, and keep away from the noxious gas such as acid and alkali. Because the noxious gas may corrode the electrical elements. It better to have doors in front and behind the power supply device and keep a distance about 800mm with the wall or other facility. The surrounding temperature should among the －10℃ to 45℃. And the relative humidity should be less than 90%.

When we operate the electronic power facility, we need to pay more attention to the safety problem, so when we install the  programmable DC power supply  we need to know the environment and device explanation. Here are the detection tips of the  programmable DC power supply . 1.Open the outer packing, check the attached system photo album, specification, inspection sheet, certification of quality. 2.Whether there are terrible damage condition during the transportational process. If there are damaged parts, we need to handle it in time. 3.If dismount the  programmable DC power supply  in the low temperature, it may appear the coagulate. We need to dry it before we use it.

The  programmable DC power supplies  has the features of high stability, lowest noise, low drifting linear structure. The high precision  programmable DC power supplies  voltage and current are 1mV/10mA and also with the power measurement display function.  The main characteristics of the  programmable DC power supplies : The five type of the voltage output can be suitable for the power requirement in wide range. It can provide high quality test data. High output resolution ratio and test resolution, 1mV and 0.1mA, and they can be used to test the circuit and implement in low power. GPIB and USB standard interface which is easy to realize automatic control.

The structure of  spectrum analyzer  seems like the oscilloscope which is used for the time domain. There are many function control buttons on the board of the spectrum analyzer. As the adjustment and control of the system control, there are real time  spectrum analyzer  and scan tune  spectrum analyzer . The function of the real time spectrum analyzer is to show the signal amplitude of the frequency domain at the same time. Its working time is as to different frequency signal there are different filters, then send the signal to the CRT screen through the multitask scanning machine. The advantages is that it can show the moment reaction, while the disadvantages is the high cost and the performance is limited by the frequency wide range.

According to the different signal wave, there are four types of  signal generator : 1.Sinusoidal  signal generator . It is mainly used to measure frequency characteristic, non-liner distortion, gain and sensitivity of circuit and system. According to different performance and application, the signal generator can be divided into the low frequency signal generator (20Hz-10Hz), high frequency signal generator (100kHz-300kHz), microwave signal generator, sweep frequency and cell-type signal generator, frequency synthesis pattern signal generator. 2.Function  signal generator  can generate some certain periodicity function wave form signal. It can be applied in the other non-electric measurement field. 3.Pulse signal signal generator, which can generator the adjustable width, range and frequency signal. It can be used to test the systematic transient response or analog signal. 4.Random signal generator. It includes the noise signal generator and pseudo random si...

The advantages of the  programmable DC power supplies  are high stability, the lowest noise, low drifting liner structure. High precious  programmable DC power supplier  has the power measurement and compensation function.  The  programmable DC power supplier  has the following features: High stability, lowest noise, low drifting liner structure; Constant voltage, current working pattern; The panel function is easy to operate, constant voltage and current output; Big size LED display; High resolution of the voltage and current; Voltage and current time function set, continuous output in different wave; High speed programmable DC power supplier.

Spectrum analyzer  is a versatile electronic measuring instruments to study on electrical signal spectrum structure, which is applied to the measurement of the signal distortion, modulation, spectral purity and frequency stability and it also can be used to measure the amplifier and filter of the circuit system. It can also be called frequency-domain oscilloscope, trace oscilloscope, harmonic analyzer, frequency analyzer, etc. Modern  spectrum analyzer  can display the results of the analysis in digital or analog mode. If the instrument internal adopt digital circuits and microprocessors, it can be with storage and computing functions.

The minimum output signal of the function  signal generator  could be less than 1mv. It is in the lead on this technology. The high-power function  signal generator  was the pioneer in our country. The feature of function signal generator is high stability, reliability, lower price. It has the unique output protection technology which can prevent the overloading, short circuit, misconnection and other wrong operation. The implement method: 1.The function generator make up of the discrete component: it is usually the single signal generator with the not high frequency. The working of it is not stable and hard to debug. 2.The function signal generator with the integrate chip: it can generate many waveform, can reach a higher frequency and be easy to debug. 3.The function generator signal with DSS chip: it can generate random waveform and reach a very high frequency. But its cost is too high. 

over 30% of the integrated circuit nominal voltage, it may cause a large number of the integrated circuit injury. The influence of the short black out. For example, local communication can’t bear a short period of black out, because it will cause a overall communication outage and cause the major accident.

There are two technical indicators on the DC stabilized  power supply :  1.Index of characteristic, which reflect the intrinsic property of the DC stabilized  power supply , such as input voltage, output voltage, current output, etc. 2.Index of quality, which reflect the good and bad of the DC stabilized power supply, such as the stability, equivalent internal resistance current cause to the change of the mains input. Effect of the supply noise. For example, the supply noise has a important influence on the communication quality. Output end over-voltage influence. The short black out effect.

There are many functional control button on the  spectrum analyzer  panel, which are used to control and adjust the system function. The most important part which influence the signal reaction is filter bandwidth. The feature of the filter is Gaussian-Shaped Filter. Resolution Bandwidth represent two different frequency signal the lowest bandwidth difference. If the two signal bandwidth are lower than the RBW of the  spectrum analyzer , the two signal will be overriding. So the proper RBW is the key concept for the correct use of the spectrum analyzer.