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Tag Archives: Wireless RF

Question that the ondoscope needs paying attention to in use

Posted on December 15, 2013 by admin
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First, could you tell me what permanent relationship there is?

The sampling rate needs to meet the agricultural result fragrantly and sampling the law in theory, namely need to adopt 2 points at least in theory each cycle of the highest frequency signal of the measured signal, otherwise will cause the aliasing. But is still depending on a lot of other factors in fact, such as corrugate reconfiguration algorithm,etc., the Siglent series ondoscope adopts the advanced undulate reconfiguration algorithm, is equipped with the interpolation algorithm at the same time, reconstruct the waveform accurately. Sampling rate generally speaking is for the bandwidth one 4- 5 time can accurately recurrent waveform.

Second, how is the bandwidth in the ondoscope index understood?

The bandwidth is a basic index of the ondoscope, like definition of the amplifier bandwidth, it is so-called – 3dB clicks, namely, the input in the ondoscope adds the sine wave, it is called bandwidth for some of frequency of 70.7% o’clock of the actual range that the range decays. That is to say, the ondoscope which uses 100MHz bandwidth measures 1V, the sine wave of 100MHz, the Read more

Categories: Technology Application | Tags: Bandwidth, catch, communicati test, ondoscope, probe, sampling rate, Wireless RF

How to choose the appropriate Richter scale durometer

Posted on December 15, 2013 by admin
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The Richter scale durometer measures the detecting instrument, play an important role in guaranteeing product quality, carrying on failure analysis, so it is a key issue to choose the good Richter scale durometer to user.

1. Choose import or China to produce the Richter scale durometer?

Swiss PROCEQ Company invented the Richter scale durometer in 1977, the Richter scale durometer that this company produced was world-class, a lot of countries in the world adopt the technical standard of this company as the measurement standard of this country at present, the national measurement standard of China consults technological standard formulation of PROCEQ Company too. The leading particulars of Richter scale durometer which Swiss PROCEQ Company produces is that a host computer can dispose seven kinds of different typological impact devices. It is perfect to import the Richter scale durometer on the characteristic, but it is more expensive to import the durometer price of Richter scale, it nearly needs about 80,000 yuan to buy the Richter scale durometer that is imported D -type standard configuration, and it is inconvenient to go wrong and maintain. The Read more

Categories: Technology Application | Tags: communicati test, hardness Richter scale, PROCEQ, Richter scale durometer, shows, Wireless RF

Ann sets up the company and introduces the multi-functional handheld tester BTS Master MT822

Posted on December 15, 2013 by admin
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Ann sets up the company and introduces a longeval multi-functional handheld tester BTS Master MT8220T, it has Network Operator, subcontractor, installation personnel and all required functions while measuring base stations of supervision department. Proved Ann live sets up the BTS Master series third generation products MT8220T and adopts the design with thinner, lighter type than before, and have more high characteristics, including standard GPS receiver, enhanced dual port dynamic range, faster LTE scanner, and expanded spectrum analysis function.

BTS Master MT8220T integrates the cable, analysis meter of the aerial, function of the spectrum analyzer and internal dynamometer together, thus offer the handheld intact solution compactly, including transmitting line scanning, overall wireless signal measurement, supersensitive spectrum analysis and interference tracing that supports etc.. Moreover, this analysis meter also allocates GPS receiver with aerial. Through offering many kinds of test functions, include supporting the radio frequency to zoom out Read more

Categories: New Products | Tags: Ann sets up company, communicati, Handheld tester, MT8220T, Wireless RF

Aluminium base plate outputs the test method of the ripple noise

Posted on December 14, 2013 by admin
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There are two kinds of noises of different mode and common mode in the Ausgang of switching power supply, at the same time, easy to be influenced by random noise and power radiated noise in the environment while measuring the ripple noise. So for measure the intersection of switch and ripple – noise of power supply objectively, in the industry to adopt the intersection of parallel line and test method and paired line test method usually. Paired line test method such as Fig. 1 which Ministry of Posts and Telecommunications recommends Shown; Parallel line test method such as Fig. 2 directed against the serial module of base plate of half brick aluminium which Bell Laboratory recommends Shown.

As to aluminium base plate, new thunder can the scientific and technological Limited Company adopt Fig. 2 Test method of parallel line illustrated. The concrete requirement is:

1,Two parallel the intersection of copper and length of foil strip 51mm ‘ 2in. To 76mm 3in. During.

2,The intervals of two pieces of parallel copper foil strip are 2.54mm 0.1in. .

3,Set up thickness and width of copper foil strip possibly, guarantee the electric Read more

Categories: Technology Application | Tags: Aluminium base plate, communicati test, export ripple noise, Switching power supply, Wireless RF

R S DVMS has already supported the supervision on DVB-T2 network in an all-round way

Posted on December 14, 2013 by admin
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R Read more

Categories: New Products | Tags: communicati test, embedded, high speed serial, ondoscope, Wireless RF

Principle and application of the weighing cell

Posted on December 13, 2013 by admin
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With technical progress, the electronic weigher made by the weighing cell has already been widely applied to all trades and professions, it is weighed that the ones that have realized to the supplies are fast, accurate, especially with the appearance of the microprocessor, the constant improvement of the automaticity industrial production process, the weighing cell has already become a kind of essential device in proceeding control, large-scale pot, hopper,etc. poidometer examining and crane scale, car balance,etc. that can’t be weighed since before count and examine controlling, get and mix automatic detection and body feedstock flow control of the powder particle in the batching system which assign many kinds of raw materials, production technology,etc., having employed the weighing cell, at present, the weighing cell has nearly been applied to all weighing fields.

1. The high speed is quantitative to package the system

This system by weighing and comparison of the weighing cell of microcomputer controlled, and export the control signal, carry out definite value to weigh, control the operation of the outside feed system, the task weighed automatically Read more

Categories: Technology Application | Tags: communicati test, control signal, Electronic scale, weighing cell, Wireless RF

Detecting means of the diode and experience

Posted on December 12, 2013 by admin
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1 measures the low-powered diode transistor

A Differentiate the positive and negative electrode

a Sign flag of the ones that observe on the outer cover. Usually mark the symbol of a unit of diode, one end with triangle arrowhead, as positive pole on the outer cover of the diode, another end is the negative pole.

b Observe the color dot on the outer cover. On the outer cover of the point contact diode, usually mark the color dot of polarity white or red . Generally mark one end of the color dot to get positive pole. Mark the color circle on other diodes, one end with color circle is the negative pole.

cThat the resistance-value is measured a minor once serves as the standard, one end that black table pen connects is the positive pole, one end that red table pen connects is the negative pole.

B Measure the maximum operating frequency fM. Diode transistor operating frequency, except can consult from relevant property lists that go outside, the ones that often observe within the diode with eyes touch silks to distinguish in practical, if the point contact diode is a high frequency tube, surface contact type diodes are mostly low frequency tubes. Read more

Categories: Technology Application | Tags: communicati test, diode measured, shows, spark-over voltage, TVS, Wireless RF

Classifying and employing knowledge of electronic measuring instrument

Posted on December 12, 2013 by admin
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The electronic measuring instrument roughly assigns the following several kinds according to its operating principle and use.

1.Multimeter

Analog voltmeter, simulation multimeter Namely pointer multimeter VOM , digital voltmeter, digital the multimeter ‘ Namely digital multitester DMM Belong to this kind. This often uses the instrument. It can use the measurement exchange / direct-current volts, it exchange /DC current, electric resistance value, capacitor capacity, inductance quantity, audio frequency level, frequency, transistor-resistor logic NPN or PNP current amplification factor value,etc..

2.Ondoscope

Ondoscope one the intersection of measurement voltage and corrugate electron tube instrument, it can examine into the intersection of voltage and the intersection of signal and time varying law, come out with the graphic display. Not merely can observe to use the ondoscope the change overall picture of examining the physical quantity ocularly and vividly, and can carry on the comparison of frequency and phase place through its expicity waveform, the measurement voltage and electric current, and describe characteristic Read more

Categories: Technology Application | Tags: communicati examined, Electronic measuring instrument, multimeter, ondoscope, Wireless RF

On the basis of the fatigue state detecting means of the pilot of 3G video

Posted on December 11, 2013 by admin
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Fatigue driving has already become one of the major causes why the traffic accident has happened. Have proposed a person asthenopic detecting means based on 3G video in the article. Pick the video frame to the video flowing through DirectShow technology, adopt the complexion gathering characteristic to position the human face, position and track the human eye on the basis of gradation information, and adopt Perclos method to judge fatigue. Through this method, can find out about the driver’s fatigue state in time, prevent from fatigueing drive effectively.

Fatigue driving is that the driver is driving in the course intermediary soberly in consciousness and entering a kind of abnormal condition of people’s sleep, it is one of the major causes which causes the traffic accident. Because the vehicle is highly liquid, the task area is wide, potential safety hazards are many, risk responsibility is great, and lack the valid supervision means of science, the car accident that fatigue driving leads to the fact happens occasionally in recent years. Control the real-time monitoring of pilot’s facial state of system pair through 3G video, once find pilot’s Read more

Categories: Technology Application | Tags: 3G, communicati test, fatigue state, high speed, ondoscope, video, Wireless RF

Operating principle, characteristic and development trend of the intelligent instrument

Posted on December 11, 2013 by admin
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The appearance of the intelligent instrument, has expanded the application area of the traditional instrument greatly. Intelligent instrument rely on their volume little, the intersection of function and better, low power dissipation co dominant, widely used in household electrical appliance, R Read more

Categories: Technology Application | Tags: communicati test, electric signal examined, have parameter, Intelligent instrument, oscillometric, Wireless RF
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