oscilloscope preamplifier

features of stable wavelength, adjustable and high speed and low chirp of the modulator. There are several integrated light sources: One is the DFB semiconductor laser and the electronic absorption modulator monolithic integration. The second is the single chip integration of the DFB semiconductor lasers and the m-z modulator: There are also distributed Bragg reflector (DBR) lasers and modulator monolithic integration as well as a hybrid integrated DBR laser composed of semiconductors and fiber

address is a 7-bit address, and the address configured in the kernel is a real address, this requires special attention. Otherwise, i2c will fail, resulting in loading failure of the camera driver. After configuring the relevant information, start the camera and test it. The camera is stopped and cannot be connected to the device. Capture the related kernel log and find that the match id fails. As a result, the driver cannot be loaded, I initially suspected that the related voltage could not wo

For serial communication, the effect of setting data bit length on communication isIn the serial data communication, you will see the serial port parameter settings. Where the "Data bits" setting, there are four options, namely 8, 7, 6, 5. So how does changing this parameter affect the transfer of data?I'm going to do an experiment, through the oscilloscope to observe the communication process, can analyze the results as follows:For example, the data

signals: Purchase a separate Ad/da module, voice compression chip AMBE2000, speech coding chip CMX649 2. Refer to TI's book 4.3.5 The PN Code Spread spectrum, DDS, Ad/da, demodulation, expansion and other circuit modules to build a complete circuit (difficult on the frame)* * Also, complete spectrum analysis topics2nd phase 2015-7-22one, the infrared optical communication One problem1. Analog part: complete voice transmission over two meters. Commissioning Process: Before

R ) configuration bits. after the plli2s is enabled, the configuration parameters cannot be changed. Ⅲ, Code AnalysisTake the stm32f4x5, X7 series of chips as an example to analyze the configuration of the system clock.Reference Software Engineering:https://yunpan.cn/cRepWDShSK4yc access password 65b11. Frequency multiplier parametercombined with the above clock tree and source code can be seen, the system clock PLLCLK The main calculation is the configuration Pll_m , Pll_n , pll_p these three

in technology. Never go into technology with one mind! Put a lot of pressure on yourself. If you put all your thoughts on this, you will surely become a character like Kong Yiji! That's enough, because technology is only one of the pillars of your future, and it is not the biggest pillar, unless you are willing to be an old engineer! [3] Do not be a technical master, but a general quality master! When we are in a company, we often look down on someone and say, "I don't know anything. Why do we

, line and line between the distance too close or the chip between the level of mismatch, so that the transmission signal has "oscillation" or "reflection" caused by signal interference, so that the chip has anti-interference ability and cause system panic. According to the actual maintenance statistics, the random fault caused by the hardware is about 70% of the total number of failures, which is the main reason of the stochastic failure, and also the part of this article. Stochastic fault anal

chip. 5. Poor anti-interference ability. Chip power cord and ground wire on the printed circuit board wiring width too small, line and line between the distance too close or the chip between the level of mismatch, so that the transmission signal has "oscillation" or "reflection" caused by signal interference, so that the chip has anti-interference ability and cause system panic. According to the actual maintenance statistics, the random fault caused by the hardware is about 70% of the total n

, Literature of Duquennoy, Dunkels [16],lunden, Dunkels [17] and Tsiftes, Dunkels [24].4.1 Micro BenchmarkWe measure individual energy consumption by running Contikimac's Tmote Sky mote. We used a 100 ohm resistor in series with the Tmode Sky power supply and then measured the voltage above the resistor using an oscilloscope. The CONTIKIMAC registers the status of the wireless signal on one of the pins of the tmote Sky I/O, where the high level indica

(10001000), the preceding 1000100 is the address, and the last 0 is a read-write bit. The quorum procedure is to monitor for SDA conflicts when starting the condition and sending the address. SDA output high power at ordinary times, read back is low level, indicating that there is a conflict on the bus. oscilloscope Measurement Need to test SCL,SDA at the same time. The oscilloscope two channel open, respe

"Finishing" 61ic.com "Provider" llz77 "Detailed description" IAR for STM8 exact delay function With the IAR for STM8, there is a project to accurately know the number of delay line delay time is how many, the Internet search under unexpectedly did not, and found that a lot of people ask how such a function, I use oscilloscope measurement to do a precise delay function, to share with you friends. The clock start function (16M crystal oscillator) is

Help coal mine customers adjusted for many years terminal resistance, summed up some of the experience for everyone to reference, no reference theory, but are the result of practice. About the terminal resistor: We always remember can terminal to add 120 euro, but that is a short distance impedance matching results, if in the long-distance or add 120 kohm will be very harmful to the signal, because the can transceiver drive capacity is certain, transmitted 5 km, back to the route impedance (can

Recently, there is a product used to the module, because there is no technical support, directly on the machine debugging, test results for the band barrier launch distance of 60 meters. Here are a few knowledge points to apply: 1: The programming operation, actually relatively simple, the modulation signal 315M is the module comes with, does not need the modulation and the demodulation, we only need to control own agreement, I use is the Infrared emission Protocol to control. 2: The transmit bi

============ Problem Description ============Android Development Board in hand, mic recording Go is i2sI'm using the audio recording software provided by Android itself soundrecoder.apkWhen recording, the small pointer that detects the sound seldom shakes, when my voice is high, I can record it, the sound is smooth, and then a high or can record!The sound is intermittent, and it's very nasty!I use the USB interface of the camera to record, (because the camera also with mic, just USB interface),

engineer! [3] Do not be a technical master, but a general quality master! When we are in a company, we often look down on someone and say, "I don't know anything. Why do we get so much money and why do we get promoted !" This is a common example of engineer pedantic. Is 8051 awesome? People must have his skills, and you cannot. Do you think the boss has been operating for so many years? People may be good at management, understanding the boss's intentions, and department coordination. Therefore

, because the company will ask you for Bootloader during interviews, as a product. (3)We will have a preliminary understanding of the working process of arm11 and wince, and some knowledge of bootloader is more valuable than simple drivers. (4)It is necessary to implement the underlying layer. (5)I think it is necessary to learn bootloader. Otherwise, jumping directly to the wince driver development without going through the bootloader stage will give people a feeling of overhead. 2. What hardw

comprehensive quality, we have no way to go. Otherwise, we can only look at the oscilloscope in the corner! Skills other than technology are more important !! From ancient times to the present, the United States and Japan are all like this![4] Make Friends of the social education community! Do not interact with engineers only, think that there is a common language, but more importantly, communicate with other people. If you want to be a boss or a sen

received. Why can't the last byte be read during continuous reading? It is tested that this problem does not occur when the log is opened, so it can be confirmed that the delay at a specific location is insufficient. By observing the waveform through the oscilloscope, we can see that the last byte has been read, and the Stop waveform is also displayed, therefore, it is determined that the last byte has not entered the FIFO before the last read of RX-

Http://www.gamespot.com/gamespot/features/video/hov/ By Leonard Herman, Jer Horwitz, Steve Kent, And Skyler Miller In 1949, a young engineer named Ralph Baer was given an assignmentBuild a television set. He wasn' t supposed to build just any televisionSet, but one that wocould be the absolute best of all televisions. ThisWas not a problem for Baer, but he wanted to go beyond his originalAssignment and ineffecate (include, add, absorb)Some kind of game into the set. He didn'tKnow exactly what k

microcomputer is not running after power-on?First, check whether the power supply voltage is normal. Use a voltmeter to measure the voltage between the grounding pin and the power supply pin to see if it is the power supply voltage, such as the commonly used 5 V.Next, check whether the reset pin voltage is normal. Measure the voltage values of the reset button and the open reset button to see if they are correct.Then check whether the crystal oscillator is vibrating. Generally, use an