How to select a suitable Logic Analyzer

Logic Analyzer is an instrument to collect and show digital signal from the tested device by using clock, and its main function is time sequence judging. Differently from oscilloscope having many voltage grades, logic analyzer usually only displays two voltage (Logic 1 and 0). After reference voltage is set, it will judge the signal by comparator, that higher than reference voltage is judged to High, that lower than reference voltage is judged to Low, then show the waveform by point depiction method.

It has some key parameters: sample rate, input channels, memory depth, trigger and other advanced analysis function. Here we'll introduce these parameters through Suin SA8320 Logic Analyzer.

Sample rate

Sample rate is the numbers of collected signal per minute. In order to get higher accuracy, logic analyzer’s sample rate should be at least 5 times of tested signal frequency. Suin SA8320 sample rate is 1Hz-100MHz. You can choose it according to your tested signal frequency.

Input channels

Enough channels is necessary due to the many tested signal channels. Suin SA8320 has 32 data sampling channels and 2 external clock channels, which can meet most of laboratory requirement.

Memory depth

The collected high voltage and low voltage signal should be stored in a memory. If sample rate is very high, but the memory depth is not large enough, that is meaningless either. It means the max points stored in the logic analyzer. Suin SA8320 memory depth is 256K bytes per channels.

Trigger

Once logic analyzer is powered on, it will test the input signals in time and compare it with the trigger conditions, and start to record the signal when it is same with the trigger conditions. Suin SA8320 has 32 bits trigger level, and 32 bits trigger comparand.

How to classify signal generators

Signal generator is an instrument that can provide all kinds of frequency, waveform and output level, amplitude in measuring telecommunication system or instrument.

It can be classified to below kinds according to different frequency bands:

 

Ultra-low frequency signal Generator

Its frequency is usually lower than 0.1Hz, mainly used in some special field.

 

Low frequency signal generator

It usually indicates 1Hz-1MHz audio frequency signal generator.

 

High frequency signal generator

It is also called RF signal generator, mainly indicates 100kHz-XXXMHz signal generator, and usually used in telecommunication and measuring field. Suin TFG1900A Series, TFG1900B Series, TFG6800 Series, TFG2900A Series, TFG3900A Series and TFG6900A Series belong to this kind.

Suin TFG6810 Function Generator

Microwave signal generator

Its frequency usually can be XGHz to XXGHz, mainly used in radar field. Suin TFG3600 Series, SU3630, TFG368X Series belong to this kind. Frequency range can be 10MHz-12GHz, and 10MHz-20GHz.

Suin TFG3681 Microwave Signal Generator

What signals does AC Millivolt Meter test?

Millivolt meter is a common electronic test instrument, then what signals does it test usually? Let's have a look below:

AC Millivolt meter is designed for accurately testing AC voltage, especially the small signals’ AC voltage, from XmV to XXmV. So when testing small signals, it is usually millivolt meters used, while not the oscilloscope which has bigger errors.

Another point is AC Millivolt meter can be only used to test Sine AC signals Vrms, if the tested signal is non-Sine signal, the measured values should be converted.

 

Below is Suin AC Millivolt meters, should you have interest in it, pls kindly contact us.

Features:

• 3 1/2 or 4 1/2 digits display

• LED display, dual independent channels

• Auto/manual ranging be selected

• Multiple display result with different units

• High frequency range from 5Hz to 6MHz

• Standard interface USB Device

Suin SM2160 AC Millivolt Meter

The difference between Linear and Switching Power Supply

Linear power supply and switching power supply are two common types in the market, then do you know their characteristics and difference? Here we'd like to share some tips.

Linear power supply, with features of quick response, low ripple and noise, low electromagnetic interference, belongs to DC stabilized power supply and can lower voltage output. Because of higher safety, it is widely used in big factories, education, science and research and some monitoring system required higher image and audio/video quality. But to achieve above features, high-frequency transformer should be used, which produce more heat and reduce work efficiency.

*SK3325J Programmable DC Power Supply- Linear Type, Industrial version

*SK3325 Programmable DC Power Supply- Linear Type, Economic version

Pass transistor used on switching power supply usually works between saturation and cut-off status, so switching power supply has advantage of lower heat, high efficiency and smaller size, but also has disadvantage such as higher ripple and noise and bigger  electromagnetic interference. Therefore, switching power supply will be best choice in small applicable site required high efficiency.

The SK33XX series programmable linear DC power supplies have three independent outputs – two sets of adjustable voltage/current and a fixed set of selectable voltage1.8V, 2.5V, 3.3V and 5V. it has three available operation modes–independent, series and parallel modes. All make this series become a high performance-to-price ratio instrument.