色哟哟视频在线观看-色哟哟视频在线-色哟哟欧美15最新在线-色哟哟免费在线观看-国产l精品国产亚洲区在线观看-国产l精品国产亚洲区久久

電子發燒友App

硬聲App

0
  • 聊天消息
  • 系統消息
  • 評論與回復
登錄后你可以
  • 下載海量資料
  • 學習在線課程
  • 觀看技術視頻
  • 寫文章/發帖/加入社區
會員中心
电子发烧友
开通电子发烧友VIP会员 尊享10大特权
海量资料免费下载
精品直播免费看
优质内容免费畅学
课程9折专享价
創作中心

完善資料讓更多小伙伴認識你,還能領取20積分哦,立即完善>

3天內不再提示
電子發燒友網>電子資料下載>類型>參考設計>四號Mxfef快速發射指南

四號Mxfef快速發射指南

2021-03-22 | pdf | 2.61MB | 次下載 | 2積分

資料介紹

This version (28 Jan 2021 15:33) was approved by Mike Jones.The Previously approved version (28 Jan 2021 15:32) is available.Diff

Quad-MxFE Quick Start Guide

Equipment Needed

Required Equipment

Optional, But Helpful Equipment

Test Setup


Software Needed

HDL/Image

The required FPGA files and .tcl scripts can be downloaded from here:

Once downloaded, unzip these files to a folder on the desktop called QuadMxFE (this directory will be used in XSCT).


IIO Oscilloscope / LibIIO

The main IIO interface is provided in the install of IIO Oscilloscope which uses LibIIO to communicate through IIO to the chips on the Quad MxFE board. The install process for IIO Oscilloscope and a walkthrough of opening the program can be found here: Quick Start IIO Oscilloscope.


PuTTY

PuTTY helps to provide a view into the Linux and give additional controls and debug abilities. Putty can be downloaded from here Putty Download Page. Ensure that the proper version for the computer is downloaded (64 bit for a 64 bit PC). Once downloaded the COM port to the FPGA can be opened. This COM port can be identified through the device manager as the standard COM port:

In PuTTY, this should be opened with a baudrate of 115200.


Xilinx Software Command Line Tool (XSCT)

In order to program the FPGA, the Vitis/Vivado tool suite is required: Vivado Toolchain. Grab the Self Extracting Web Installer from the full product installation section and run the installer. Choose the Vitis installation option which will include the Vivado install.

The main tool used for programming the FPGA is the Xilinx Software Commandline Tool is a tool included as part of the installation of the Xilinx Vitis platform. An example sequence of commands will resemble what is below. However, this will vary depending on the location of the files and programming will be performed later.

 Xilinx Software Commandline Tool (XSCT) v2019.1
   Build date : May 24 2019-15:06:52
     Copyright 1986-2018 Xilinx, Inc. All Rights Reserved.

xsct% cd Desktop/Quad_Mxfe_Files
xsct% source run.vcu118_quad_ad9081_204b_txmode_9_rxmode_10.tcl 

MATLAB 2019b or 2020a/b (Optional)

MATLAB is used to exercise the board through LibIIO objects and provide higher level application functionality. In order to work with the platform, a number of toolboxes and support packages are required:

  1. MATLAB Communications Toolbox, DSP System Toolbox, and Signal Processing Toolbox. Customers can request a free trial via the Communications Toolbox product page, or they can request a Software-Defined Radio Design trial “package”, which includes MATLAB, Simulink, DSP System Toolbox, Signal Processing Toolbox, and Communications Toolbox.
  2. Communications Toolbox Support Package for Xilinx Zynq-Based Radio. Installed through MATLAB Add-On Explorer.
  3. Analog Devices High Speed Converter Toolbox. Can be installed through MATLAB Add-On Explorer or latest version here: High Speed Converter Toolbox Download Page

Example Quad-MxFE MATLAB scripts are provided:
Example Quad-MxFE MATLAB Scripts


Quick Start Bringup with Hardware

This section assumes the following:

  1. Standoffs have been attached to Quad MxFE board
  2. VCU118 and Quad MxFE have been attached via a FMC+ extender on the FMC+
  3. Ethernet cable has been connected to VCU118 and connected to USB to Ethernet
  4. USB to Ethernet dongle has IP address of 192.168.2.5. For locally connected FPGAs (i.e. Ethernet cable from VCU118 to USB to Ethernet dongle), the Hostname is 192.168.2.1. This assumes that the USB to Ethernet dongle has been configured with an IP address of 192.168.2.x where x represents a number 0 to 255 (excluding 1). This can be seen in the image. These settings are accessed (in Windows 10) by typing Network into the start menu then choose the “change adapter options” select and right click on the USB to Ethernet dongle. Select properties from the right click menu. Once the IP has been set, it will be remembered on the computer. Click ok on both windows to close and save the Dongle IP settings.

 Configuration of USB to Ethernet Dongle IP

  1. 2x micro USB cables have been connected to PC and VCU118 for JTAG and Serial
  2. All required software programs have been installed. See here for full list: Software Needed
  3. All FPGA images/script files have been downloaded and unzipped to a folder on the Desktop called QuadMxFE
  4. 500MHz ~0dBm source has been attached to Quad MxFE central clock input SMA
  5. 12V power bricks (>8A for Quad MxFE and >5A for VCU118) have been connected to boards
  6. Fans have been turned on

General Board Power Up/Programming Sequence

The power up sequence is not difficult:

  1. Power up the 500MHz oscillator
  2. Power up the Quad MxFE Board
  3. Power on the VCU118 board

Once these are powered up, program the FPGA:

  1. Open Putty at the correct COM port and baudrate of 115200. See this section to determine the correct COM port Putty Configuration
  2. Open Xilinx Command Line Tool (XSCT). Open it from the Start Menu under Xilinx --> Xilinx Software Commandline Tool. Once the prompt is open, type:
    cd Desktop/QuadMxFE

    If the files were unzipped somewhere else, then change directory to that folder.

  3. Run the loading script for the particular build by typing the following (example) in XSCT:
    source run.vcu118_quad_ad9081_204c_txmode_11_rxmode_4.tcl

    The statement above will launch the programming of the first build, but the others can be run by changing the name of the particular .tcl file to be loaded

  4. Wait for the programming to finish in XSCT. This should show that the tcfchan#1 was closed as the final step.
  5. Wait for the build to boot completely by checking the Putty terminal window. The putty window shows the progress of the Linux image booting. Wait for the login prompt as shown at the bottom. This example output is from the Txmode 11 Rxmode 4 image output. At this point, the image is ready to use in MATLAB or additional debug steps can be performed. To log into the image, the username and password are
    UN: root 
    PW: analog
  6. At this point the FPGA has booted and all of the blue PLL lights should be illuminated. The FPGA is ready to be controlled from MATLAB or from IIO Oscilloscope.
  7. To work in IIO Oscilloscope, open IIO Oscilloscope and use the GUI
  8. To control through MATLAB, open the script that matches the name of the .tcl file that was run in XSCT. Once this script is open, run the script from the top of the MATLAB editor or hit F5 to run the script.

MATLAB Control Overview

The Quad-MxFE Platform can be controlled via MATLAB using example scripts which are available as part of the Analog Devices, Inc. High Speed Converter Toolbox add-on. This add-on can either be manually downloaded or downloaded and installed via MATLAB Add-On Explorer. Please ensure you have installed both the Analog Devices, Inc. High Speed Converter Toolbox as well as the Communications Toolbox Support Package for Xilinx Zynq-Based Radio as shown below.


Example scripts are located within the add-on install directory, which is usually located in the

C:/Users//AppData/Roaming/MathWorks/MATLAB Add-Ons/Toolboxes

directory. The example scripts are specifically located in the following folder:

Analog Devices, Inc. High-Speed Converter Toolbox/hsx_examples/qmxfe

Controlling Quad-MxFE With MATLAB

The control interface for the Quad-MxFE is implemented using standard system objects in MATLAB. Basic information for instantiating the objects is provided in the toolbox documentation within MATLAB and on this page. Here is an example instantiation of the objects:

>> tx = adi.QuadMxFE.Tx()

tx = 

  adi.QuadMxFE.Tx with properties:

    ChannelNCOFrequenciesChipA: [0 0 0 0 0 0 0 0]
    ChannelNCOFrequenciesChipB: [0 0 0 0 0 0 0 0]
    ChannelNCOFrequenciesChipC: [0 0 0 0 0 0 0 0]
    ChannelNCOFrequenciesChipD: [0 0 0 0 0 0 0 0]
       MainNCOFrequenciesChipA: [0 0 0 0]
       MainNCOFrequenciesChipB: [0 0 0 0]
       MainNCOFrequenciesChipC: [0 0 0 0]
       MainNCOFrequenciesChipD: [0 0 0 0]
         ChannelNCOPhasesChipA: [0 0 0 0 0 0 0 0]
         ChannelNCOPhasesChipB: [0 0 0 0 0 0 0 0]
         ChannelNCOPhasesChipC: [0 0 0 0 0 0 0 0]
         ChannelNCOPhasesChipD: [0 0 0 0 0 0 0 0]
            MainNCOPhasesChipA: [0 0 0 0]
            MainNCOPhasesChipB: [0 0 0 0]
            MainNCOPhasesChipC: [0 0 0 0]
            MainNCOPhasesChipD: [0 0 0 0]
     ChannelNCOGainScalesChipA: [0 0 0 0 0 0 0 0]
     ChannelNCOGainScalesChipB: [0 0 0 0 0 0 0 0]
     ChannelNCOGainScalesChipC: [0 0 0 0 0 0 0 0]
     ChannelNCOGainScalesChipD: [0 0 0 0 0 0 0 0]
               NCOEnablesChipA: [0 0 0 0 0 0 0 0]
               NCOEnablesChipB: [0 0 0 0 0 0 0 0]
               NCOEnablesChipC: [0 0 0 0 0 0 0 0]
               NCOEnablesChipD: [0 0 0 0 0 0 0 0]
         EnableResampleFilters: 0
      CalibrationBoardAttached: false
                           uri: 'ip:analog'
               EnabledChannels: 1
                    DataSource: 'DMA'
           EnableCyclicBuffers: false

>> rx = adi.QuadMxFE.Rx()

rx = 

  adi.QuadMxFE.Rx with properties:

    ChannelNCOFrequenciesChipA: [0 0 0 0]
    ChannelNCOFrequenciesChipB: [0 0 0 0]
    ChannelNCOFrequenciesChipC: [0 0 0 0]
    ChannelNCOFrequenciesChipD: [0 0 0 0]
       MainNCOFrequenciesChipA: [0 0 0 0]
       MainNCOFrequenciesChipB: [0 0 0 0]
       MainNCOFrequenciesChipC: [0 0 0 0]
       MainNCOFrequenciesChipD: [0 0 0 0]
         ChannelNCOPhasesChipA: [0 0 0 0]
         ChannelNCOPhasesChipB: [0 0 0 0]
         ChannelNCOPhasesChipC: [0 0 0 0]
         ChannelNCOPhasesChipD: [0 0 0 0]
            MainNCOPhasesChipA: [0 0 0 0]
            MainNCOPhasesChipB: [0 0 0 0]
            MainNCOPhasesChipC: [0 0 0 0]
            MainNCOPhasesChipD: [0 0 0 0]
                 TestModeChipA: 'off'
                 TestModeChipB: 'off'
                 TestModeChipC: 'off'
                 TestModeChipD: 'off'
              EnablePFIRsChipA: false
              EnablePFIRsChipB: false
              EnablePFIRsChipC: false
              EnablePFIRsChipD: false
            PFIRFilenamesChipA: 
            PFIRFilenamesChipB: 
            PFIRFilenamesChipC: 
            PFIRFilenamesChipD: 
           ExternalAttenuation: 0
               SamplesPerFrame: 32768
         EnableResampleFilters: 0
      CalibrationBoardAttached: false
                           uri: 'ip:analog'
               EnabledChannels: 1

CalBoardVCU118.m

This folder also contains a driver file CalBoardVCU118.m for controlling the optional 16 Tx / 16 Rx Calibration Board via the VCU118 PMOD interface intended to mate to the Quad-MxFE Platform. This driver file allows the user to perform the following functions after instantiation using CalibrationBoard = CalBoardVCU118:

  1. CalibrationBoard.ConfigureCombinedLoopback: Loop Combined Tx Channels Back Into Combined Rx Path
  2. CalibrationBoard.ConfigureAdjacentIndividualLoopback: Loop Individual Tx Channels Back Into Adjacent Rx Path
  3. CalibrationBoard.ConfigureTxOutSMA: Send Combined Tx Channels Out J502 SMA Connector For Off-Board Analysis
  4. CalibrationBoard.ConfigureRxInFromSMA: Send Combined Rx Input Into J501 SMA Connector & Inject Into All Rx Channels
  5. CalibrationBoard.ConfigureTxOutToLTC5596: Send Combined Tx Channel Signal Into LTC5596 Power Detector
  6. CalibrationBoard.QueryAD8318_voltage: Poll the Measured AD8318 Power Detector Voltage From the On-Board AD5592R ADC
  7. CalibrationBoard.QueryHMC948_voltage: Poll the Measured HMC948 Power Detector Voltage From the On-Board AD5592R ADC
  8. CalibrationBoard.QueryLTC5596_voltage: Poll the Measured LTC5596 Power Detector Voltage From the On-Board AD5592R ADC

If the user intends to use the 16 Tx / 16 Rx Calibration Board in their analysis, then be sure to enable tx.CalibrationBoardAttached = 1 and rx.CalibrationBoardAttached = 1 in the tx and rx channel initialization.


LoadVcu118Code.m

For convenience, there is also a function file available named LoadVcu118Code.m which allows the user to load new .tcl files via the MATLAB interface that correspond to the available use cases presently supported with the Quad-MxFE Platform. These .tcl files can be obtained from the .zip file download available on the Quad-MxFE Software Quick Start Guide. The default configuration for the example scripts is such that the code is commented for this function, but the user can uncomment it at the beginning of loading the new bitstream, then execute the function and re-comment it so that the system doesn't boot each time the script is run. Be sure to wait until the system fully boots prior to executing any additional MATLAB scripting. The boot process can take a few minutes and status can be obtained via a terminal window such as PuTTY. Please install the Vivado Toolchain in order to know the path for the Xilinx Software Command Line Tool (XSCT) to be able to utilize this feature.

  1. LoadVcu118Code(xsctpath,tclpath): First parameter: Installed xsct.bat folder; 2nd Parameter: Downloaded ./run.tcl' file location

Presently there are three MATLAB example scripts. The default uri for the connection to the VCU118 is 192.168.2.1. Please ensure that no VPN connection is present when trying to establish a connection to the Quad-MxFE Platform.

These three scripts perform the following applications:


QuadMxFE_SimpleTxRx.m

The default test setup for this script uses the 16Tx/16Rx Calibration Board as shown below in which each Tx channel is looped back into the adjacent Rx channel after going through a 10dB attenuator on the 16Tx/16Rx Calibration Board.

This script is to be used with the Analog Devices Quad-MxFE Platform to demonstrate relatively simple MATLAB control of the system. It allows the user to configure the Tx and Rx aspects of the system by using the tx = adi.QuadMxFE.Tx and rx = adi.QuadMxFE.Rx system objects. The script then loads transmit waveforms and captures receive data for all channels on the system. All enabled Rx channels are then plotted in both the time domain and the frequency domain as an overlay plot. The script also polls the measured temperatures of the four ADF4371 and four AD9081 in the system and then plots those temperatures. No Rx nor Tx calibration is performed, nor are any multi-chip synchronization algorithms. The default configuration for this script uses the 16 Tx / 16 Rx Calibration Board in adjacent individual loopback mode. If the user does not have this part of the platform they will need to ensure they modify the script accordingly.

Using this script as a basis, the user can modify the script for their own use case such that they can:

  1. Inject Custom Tx Waveforms for Each Enabled Tx Channel Using tx(waveformDataMatrix)
  2. Change Tx NCO Frequencies Using, For Example, tx.MainNCOFrequenciesChipA or tx.ChannelNCOFrequenciesChipA
  3. Change Tx NCO Phases Using, For Example, tx.MainNCOPhasesChipA or tx.ChannelNCOPhasesChipA
  4. Capture Simultaneous Complex-Valued Rx Data for All Enabled Channels: rxData=rx()
  5. Change Rx NCO Frequencies Using, For Example, rx.MainNCOFrequenciesChipA or rx.ChannelNCOFrequenciesChipA
  6. Change Rx NCO Phases Using, For Example, rx.MainNCOPhasesChipA or rx.ChannelNCOPhasesChipA
  7. Change On-Board Digital Step Attenuator Value Located in the Rx Front-Ends Using rx.ExternalAttenuation
  8. Change 16Tx/16Rx Calibration Board Configuration
  9. Perform MxFE Register Reads/Writes
  10. Analyze and Post-Process Captured Waveforms

More information can be found on the Tx and Rx system objects by typing within the MATLAB Command Window help adi.QuadMxFE.Tx and/or help adi.QuadMxFE.Rx and then selecting the 'Documentation for adi.QuadMxFE.Tx' hyperlink. NCO frequencies/phases can be changed real-time using the respective Tx or Rx system object. If, at any point, the user tries to load a different buffer size into the Tx waveforms they will need to first release(tx) and then call tx once more. Likewise, if a different sized data capture is needed, then first issue a release(rx) before changing rx.SamplesPerFrame.


QuadMxFE_SystemAlignmentFIR.m

The default test setup for this script uses the 16Tx/16Rx Calibration Board as shown below in which each Tx channel is combined and then looped back into the combined Rx path after going through a 2dB attenuator on the 16Tx/16Rx Calibration Board. The combined Rx signal is then split into each Rx channel.

This script is to be used with the Analog Devices Quad-MxFE Platform to demonstrate MATLAB control of the programmable finite impulse response (pFIR) filters and NCO phase offsets in order to phase align all Rx and Tx channels in the system. It allows the user to configure the Tx and Rx aspects of the system and then load transmit waveforms and capture receive data for all channels on the system. The script uses the on-system DSP blocks to phase-align the ADF4371 device clocks by a PLL Synthesizer Phase Adjustment Process. After this, it phase-aligns all Tx channels and then loads a broadband chirp waveform into each Tx channel which spans the frequency range of the Tx I/Q data rate. It ends by also phase- and amplitude-aligning all Rx RF channels using the NCO phase offsets and pFIRs assigned to each Rx channel. It shows the process by which a calculated error response (with respect to Rx0 as the baseline) can be used to generate a 96-tap real pFIR design and then how to quantize and load that pFIR design into the system. Finally, it plots the results to determine the phase and amplitude alignment accuracy. It provides an example of how to use pFIRs with the system to obtain Rx channel equalization and gain flatness.

The output of this script are a few pFIR configuration files with a filename, for example QuadMxFE_DualReal_CH0and1_3.2GHz.cfg, for all the Rx channels. Additionally, many figures are plotted to aid with system analysis:

Figure 1: The Tx phase-alignment results are shown using the pulsed baseband waveform in which only one Tx channel is output at a time but still uses the same Tx waveform matrix. After combining all the Tx channels however using the 16Tx/16Rx Calibration Board, and then injecting this signal into the first Rx channel of each MxFE (Rx0, Rx4, Rx8, and Rx12), the ADF4371 phases are adjusted to ensure that the pulse phases of Tx0, Tx4, Tx8, and Tx12 are aligned. The top plots show the time response of received pulse trains, whereas the bottom plots show the cross-correlation of these signals with respect to Rx0.

Figure 2: The Tx phases of the pulsed waveform used to determine Tx alignment is shown. A common receiver (Rx0) detects a pulse train with the number of pulses equal to the number of enabled Tx channels in the system. The phase of each pulse directly relates to the phase of the Tx channel. The bottom plot shows the phase alignment of all Tx pulses, which therefore correspond to phase-alignment of all Tx channels.

Figure 3: Shows the time domain ADC capture, corresponding chirp FFT, and amplitude and phase errors for each channel with respect to Rx0 both before and after Rx calibration.

Figure 4: Shows the calculated error response of each Rx channel in terms of its phase and amplitude error prior to Rx calibration.

Figure 5: Presents the magnitude and phase response of the designed pFIRs based on that calculated error response.

Figure 6: Shows the individual pFIR tap coefficients both before and after quantization for each Rx channel.

Figure 7: Shows the combined Rx system performance using a single-tone waveform after all Rx channels are phase- and amplitude-aligned.


QuadMxFE_MCS.m

This script is to be used with the Analog Devices Quad-MxFE Platform to demonstrate MATLAB control of the system. It allows the user to configure the Tx and Rx aspects of the system and then load transmit waveforms and capture receive data for all channels on the system. The script uses the on-system DSP blocks to align the device clocks and output/input RF channels using the NCO phase offsets. Finally, it plots the results of a multi-chip synchronization (MCS) algorithm and allows the user to save a .mat file containing the run results.

This .mat file, if saved to the

./Baseline Files Using ADF4371 Phase Adjustment/Align Using Tx/

directory after the first time the script is run, can be used as a baseline power-up synchronization comparison to subsequent script executions. In this way, the user can determine the performance of the MCS features on the platform and view the deterministic phase relationship of the NCO phase offsets for a given NCO frequency. The open circles are grabbed from the baseline in the directory shown above, whereas the solid dots are the new NCO phase offsets after a subsequent power cycle or script execution.

The test setup is the same as that used for the QuadMxFE_SystemAlignmentFIR.m script. More information on MCS can be found in the Multi-Chip Synchronization with the Quad-MxFE + Calibration Board User Guide.

The output of this script includes a .mat file containing the script execution results with a filename dependent on the system configuration and date of execution; for example 3.2GHz_AlignADF4371s_1_AlignPLLRxs_0_1.9531MHzOffset_14_56_24__11_11_2020.mat. Additionally, many figures are plotted to aid with system analysis:

Figure 1: The ADF4371 PLL/synthesizer calibration results are shown on the top-left two plots, showing the alignment of each zeroth Tx channel on each MxFE in the platform. The two right plots show the time domain data capture after injecting a CW tone into each Tx channel, the corresponding normalized cross-correlation for each Rx channel after calibration, the FFT of that time domain capture, and the combined 16-channel FFT showing the improved noise floor performance.

Figure 2: The Tx phase-alignment results are shown using the pulsed baseband waveform in which only one Tx channel is output at a time but still uses the same Tx waveform matrix. After combining all the Tx channels however using the 16Tx/16Rx Calibration Board, and then injecting this signal into the first Rx channel of each MxFE (Rx0, Rx4, Rx8, and Rx12), the ADF4371 phases are adjusted to ensure that the pulse phases of Tx0, Tx4, Tx8, and Tx12 are aligned. The top plots show the time response of received pulse trains, whereas the bottom plots show the cross-correlation of these signals with respect to Rx0.

Figure 3: If attached, Figure 3 shows the 16Tx/16Rx Calibration Board's adjacent loopback performance.

Figure 4: A full I/Q band chirp signal is injected into each Tx channel and a corresponding data capture is performed. Then a single-frequency CW signal is injected into each Tx channel and a corresponding data capture is performed. The left side of the figure shows the individual time domain and frequency domain results, as well as the combined Rx performance. The right side shows similar results for the single-frequency CW signal.

Figure 5: The MCS results from running the script are shown. The left-most plot shows the comparison between the new (solid dots) and baseline (open circles) Rx NCO phase offsets. The second-from-the-left plot shows the comparison between the new (solid dots) and baseline (open circles) Tx NCO phase offsets. If MCS is functioning as expected the solid dots should be inside the open circles. The second-from-the-right plot shows the phase adjustment applied to each ADF4371 PLL/synthesizer IC on the system and the corresponding thermal gradients measured for each MxFE and PLL chip. The right-most plot shows the SYSREF phase stability at different portions of the script's execution.


QuadMxFE_ADCtoDAC_Loopback.m

The Quad-MxFE Platform is capable of configuring each AD9081 into a mode such that the digitized ADC output can be sent through the DDCs and looped back on-chip into the DUCs prior to being synthesized by the DACs. This allows the user to bypass the JESD204c digital interface and therefore achieve a low-latency loopback capability.

The default test setup for this script is shown below. This MATLAB script provides an example of this for all MxFEs in the system. If the user injects a combined Rx signal into J501 of the 16Tx/16Rx Calibration Board and connects the combined Tx output to J502 of the Calibration Board to a spectrum analyzer, then after running this script the user can then change the input frequency and/or amplitude to observe the repeating or frequency translating functions.


Debug

No blue lights are visible on board

If no blue lights are visible on the board, then the PLLs are not locked. The most likely cause of this is the lack of a 500MHz source into J41. Check the input power and state of the source. It should be 500MHz @ ~0dBm. Once the 500MHz signal is verified, the FPGA programming must be rerun.

Back To Quad-MxFE Main Page

声明:本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人,不代表电子发烧友网立场。文章及其配图仅供工程师学习之用,如有内容侵权或者其他违规问题,请联系本站处理。 举报投诉

下載該資料的人也在下載 下載該資料的人還在閱讀
更多 >

評論

请按住滑块,拖动到最右边
了解新功能

查看更多

广告

下載排行

本周

  1. 1電子電路原理第七版PDF電子教材免費下載
  2. 0.00 MB  |  1491次下載  |  免費
  3. 2單片機典型實例介紹
  4. 18.19 MB  |  95次下載  |  1 積分
  5. 3S7-200PLC編程實例詳細資料
  6. 1.17 MB  |  27次下載  |  1 積分
  7. 4筆記本電腦主板的元件識別和講解說明
  8. 4.28 MB  |  18次下載  |  4 積分
  9. 5開關電源原理及各功能電路詳解
  10. 0.38 MB  |  11次下載  |  免費
  11. 6100W短波放大電路圖
  12. 0.05 MB  |  4次下載  |  3 積分
  13. 7基于單片機和 SG3525的程控開關電源設計
  14. 0.23 MB  |  4次下載  |  免費
  15. 8基于AT89C2051/4051單片機編程器的實驗
  16. 0.11 MB  |  4次下載  |  免費

本月

  1. 1OrCAD10.5下載OrCAD10.5中文版軟件
  2. 0.00 MB  |  234313次下載  |  免費
  3. 2PADS 9.0 2009最新版 -下載
  4. 0.00 MB  |  66304次下載  |  免費
  5. 3protel99下載protel99軟件下載(中文版)
  6. 0.00 MB  |  51209次下載  |  免費
  7. 4LabView 8.0 專業版下載 (3CD完整版)
  8. 0.00 MB  |  51043次下載  |  免費
  9. 5555集成電路應用800例(新編版)
  10. 0.00 MB  |  33562次下載  |  免費
  11. 6接口電路圖大全
  12. 未知  |  30320次下載  |  免費
  13. 7Multisim 10下載Multisim 10 中文版
  14. 0.00 MB  |  28588次下載  |  免費
  15. 8開關電源設計實例指南
  16. 未知  |  21539次下載  |  免費

總榜

  1. 1matlab軟件下載入口
  2. 未知  |  935053次下載  |  免費
  3. 2protel99se軟件下載(可英文版轉中文版)
  4. 78.1 MB  |  537793次下載  |  免費
  5. 3MATLAB 7.1 下載 (含軟件介紹)
  6. 未知  |  420026次下載  |  免費
  7. 4OrCAD10.5下載OrCAD10.5中文版軟件
  8. 0.00 MB  |  234313次下載  |  免費
  9. 5Altium DXP2002下載入口
  10. 未知  |  233046次下載  |  免費
  11. 6電路仿真軟件multisim 10.0免費下載
  12. 340992  |  191183次下載  |  免費
  13. 7十天學會AVR單片機與C語言視頻教程 下載
  14. 158M  |  183277次下載  |  免費
  15. 8proe5.0野火版下載(中文版免費下載)
  16. 未知  |  138039次下載  |  免費
主站蜘蛛池模板: 人妻少妇精品中文字幕av蜜桃 | 久久机热这里只有精品 | 亚洲精品中文字幕乱码三区 | 一本久久a久久精品vr综合 | 精品午夜一区二区三区在线观看 | 亚洲欧美精品在线观看 | 日韩精品免费一区二区在线观看 | 9色视频在线| 强行处破女系列中文字幕 | wwwcom欧美| 久章操 | 亚洲国内自拍 | 性少妇mdms丰满 | 亚洲欧美在线视频 | 精品国产一区二区三区四区在线看 | 999热视频| 国产亚洲精品久久久久四川人 | 国产自产才c区 | 天天做天天爱天天综合网2021 | 免费色网址 | 亚洲少妇视频 | 日韩黄色录像 | 久久午夜鲁丝片 | 人妻精油按摩bd高清中文字幕 | 亚洲精品一区国产 | 伊人成年网站综合网 | 成人免费精品视频 | 国产精品偷伦视频免费观看了 | 后进极品白嫩翘臀在线视频 | 一区二区三区免费看 | 无遮挡很爽很污很黄的网站 | 桥本有菜aⅴ一区二区三区 桥本有菜免费av一区二区三区 | 欧美成人手机在线 | 两个人日本www免费版 | 伊人久久大香线蕉综合75 | 午夜视频福利在线观看 | 国精产品一区一区三区mba视频 | 日产国产欧美视频一区精品 | 成人视频在线观看 | 五月天堂色| 久久99精品久久久久久青青日本 | 少妇高潮喷水久久久影院 | 国产玖玖视频 | 国产成人精品av | 高h放荡受浪受bl | 国产精品久久久久久久久岛国 | 青青草狠狠操 | 中文无码一区二区三区在线观看 | 波多野结衣aⅴ在线 | 特黄特色大片免费视频大全 | 中国亲与子乱ay中文 | 自拍偷拍日韩精品 | 一本无码人妻在中文字幕免费 | 午夜777| 精品欧美一区二区三区精品久久 | 性高湖久久久久久久久免费 | 福利视频在线播放 | 四虎国产成人精品免费一女五男 | 黄色福利 | 91久久精品美女高潮 | 欧美性猛交xxxx免费视频软件 | 尹人av | 亚洲国产欧美另类 | 裸体丰满少妇淫交 | 超碰丝袜 | а√天堂资源8在线官网在线 | 香蕉视频在线精品视频 | av播放在线 | 久久狠狠一本精品综合网 | 久草剧场 | 欧美极品jiizzhd欧美爆 | 无码熟妇人妻av | 亚洲精品成人无码中文毛片不卡 | 最近国产中文字幕 | 日韩av高清在线观看 | 性一交一乱一乱一视频 | 四十五十老熟妇乱孑视频 | 亚洲色图3p | 亚洲国产第一 | 欧美视频亚洲 | 一二三四日本高清社区5 | 日本做床爱全过程激烈视频 | 成人av日韩 | 亚洲黄站 | 成人免费一级 | 日本三级中国三级99人妇网站 | 欧洲人妻丰满av无码久久不卡 | 国产精品天天av精麻传媒 | 一级香蕉视频在线观看 | 国产色无码专区在线观看 | 在线天堂v| 两性午夜免费视频 | 国产拍揄自揄精品视频麻豆 | 亚洲 精品 综合 精品 自拍 | 国产做受高潮 | 三级三级三级a级全黄网站 三级三级三级三级 | 日批视频免费在线观看 | 国产在线精品成人免费怡红院 | 亚洲色精品aⅴ一区区三区 国产黄大片在线观看 | jizz4 在线观看| 操操干干| 91夜色| 色老板精品视频在线观看 | 偷拍av网 | 黄色理论片 | 人体做爰aaaa免费 | 99精品国产成人一区二区 | 国产精品毛片一区二区三区 | 看全色黄大色黄大片大学生 | 中国凸偷窥xxxx自由视频妇科 | 波多野结衣av高清一区二区三区 | 国产一区二区三区四区五区tv | 欧美性生活在线视频 | 少妇高潮a一级 | 国产粉嫩av | 久久观看最新视频 | 无码国产精成人午夜视频一区二区 | 无码人妻丰满熟妇片毛片 | 九九九九九依人 | 中文字幕在线视频一区 | www精品在线 | 麻豆免费看片 | 成人久久精品 | 亚洲肥老太bbw中国熟女 | 古装大尺度激情呻吟视频 | 亚洲免费av在线 | 亚洲va久久久噜噜噜久牛牛影视 | 成人免费观看网站 | 美女视频黄色在线观看 | 久久精品无码专区免费 | 日韩av综合在线 | 国产欧美熟妇另类久久久 | 精品熟人一区二区三区四区 | 中文无码一区二区不卡av | 国产太嫩了在线观看 | 韩日av网站 | 精品国产一区二区三区不卡 | 久久久久久逼 | 清纯小美女主播流白浆 | 欧美国产在线一区 | 亚洲小视频在线观看 | 私密按摩massagexxx | 国产亚洲欧美精品久久久www | jizzjizz在线观看 | 精品国产乱码久久久久夜深人妻 | 精品久久久久久久久午夜福利 | 少妇免费毛片久久久久久久久 | 男男车车的车车网站w98免费 | 天天鲁在视频在线观看 | 午夜天堂视频 | 亚洲大尺度在线观看 | 成人观看网站 | 日本精品久久久久中文字幕乱中年 | 国产精品亚洲lv粉色 | 逼特逼视频在线观看 | 在熟睡夫面前侵犯我在线播放 | 欧美一级做性受免费大片免费 | 亚洲一本之道高清乱码 | 欧美一线视频 | 亚洲图片在线观看 | 国产精品成人网站 | 亚洲综合国产成人丁香五月激情 | 9l视频自拍九色9l视频九色 | 91免费看国产 | 野外做受又硬又粗又大视幕 | 国产成人免费高清激情视频 | 国产精品一卡二卡三卡四卡 | 黄色片大全 | 日韩在线观看网址 | 亚洲国产综合色产精品色在线 | 精品91视频 | 亚洲天堂男人网 | 日本少妇xx洗澡xxxx偷窥 | 国产精品一区二区精品 | 国产国语性生话播放 | 日韩中文字幕一区 | 久久三级网 | 国内黄色片 | 国产av无码专区亚洲版综合 | 日本老年老熟无码 | 尤物在线视频 | 一级视频在线免费观看 | 久久综合综合久久 | 九色在线视频 | 成人做爰69片免费观看 | 久久亚洲精品久久国产一区二区 | 国产乱子伦视频在线观看 | 欧美一级淫片aaaaaaa喷水 | 丰满少妇影院 | 日韩国产第一页 | 日韩精品久久久久久久的张开腿让 | 精品一区二区免费视频 | 中文日韩在线观看 | 九色九一 | 午夜性激情 | 欧美精品久久久久久久免费软件 | 九九热在线免费观看视频 | 成熟老妇女视频 | 国产成人精品在线观看 | 一区二区视频免费 | 51久久国产露脸精品国产 | 日韩精品1| 国产japanhdxxxx麻豆 | 亚洲国产综合无码一区 | 第一章婶婶的性事 | 欧美日韩一区二区免费视频 | 视色网 | 国产又滑又嫩又白 | 国产xxxx裸体xxx免费 | 国产精品久久久久久久久久久久久久 | 乱人伦人妻中文字幕无码 | 国外成人免费视频 | 免费网站观看www在线观 | 欧美三级视频在线观看 | 国产aⅴ夜夜欢一区二区三区 | 男女的隐私视频播放 | 国内精品国产成人国产三级 | 午夜性刺激免费看视频 | 久久精品国产精品亚洲色婷婷 | 国产女人的高潮大叫毛片 | tube欧美巨大44 | 日韩黄大片 | 亚洲骚片 | av在线有码| 免费一区| 免费看一区二区三区 | 亚洲精品国偷拍自产在线观看蜜臀 | 成人欧美一区二区三区的电影 | 黄色日b片| 国产黄色片在线观看 | 国产精品女同一区二区久久夜 | 亚洲精品久久夜色撩人男男小说 | 欧美精品无码一区二区三区 | 国产精品一区二区福利视频 | av无码久久久久不卡蜜桃 | 韩日午夜在线资源一区二区 | 非洲黑人狂躁日本妞 | 久久精品国产一区二区三区 | 久久不卡日韩美女 | 欧美三级影院 | 美女在线观看av | 国产清纯白嫩初高中在线观看性色 | 成人h动漫精品一区二区原神 | 韩日成人 | 成人深夜视频在线观看 | 国产美女性生活 | 欧美一区二区国产 | 国产午夜鲁丝片av无码 | 日本免费黄色 | 欧美鲁| 天天av天天爽 | 日日噜噜噜噜久久久精品毛片 | 亚洲日韩中文字幕天堂不卡 | 黄色国产一级片 | 激情麻豆 | 国产午夜精品无码 | 成人av在线一区二区 | 天天射夜夜| 大又大又粗又硬又爽少妇毛片 | 五月婷婷六月丁香 | 日本亚洲色大成网站www久久 | 在线观看欧美日韩视频 | 九九午夜视频 | 日韩三级免费 | 成人99一区二区激情免费看 | 五月丁香六月综合缴情在线 | 亚洲欧洲巨乳清纯 | 日本亲与子乱人妻hd | 少妇久久久久久被弄到高潮 | 欧美视频www | 深夜国产视频 | 欧美激情一区二区在线观看 | 337p日本欧洲亚洲大胆 | 国产熟睡乱子伦视频 | 一曲二曲三曲在线观看中文字幕动漫 | 一区二区美女视频 | 久久人人爽人人爽人人av东京热 | 国产18毛片 | 黄色性情网站 | 先锋av资源在线 | 三区在线观看 | 翘臀后进娇喘呻吟的少妇91 | 亚洲成a∨人片在线观看不卡 | www国产一区二区 | 亚洲国产精品久久精品 | 青青青国产精品一区二区 | 亚洲国产精品无卡做爰天天 | 麻豆中文字幕 | 免费裸体无遮挡黄网站免费看 | 国产98色在线 | 国 | 激情内射亚洲一区二区三区 | 国产精品扒开腿做爽爽爽视频 | 日本女优在线看 | 免看一级片 | 久久夜色精品国产 | 4438x亚洲| 114一级片| 亚洲精品理论 | 中文字幕av伊人av无码av | 国产精品一区二区手机在线观看 | 亚洲精品久久久一区二区三区 | 含羞草www国产在线视频 | 亚洲男人av香蕉爽爽爽爽 | 成人精品一区二区三区中文字幕 | 国产国产乱老熟女视频网站97 | 黑人粗大猛烈进出高潮视频 | 人妻无码熟妇乱又伦精品视频 | 国产成人午夜精品影院游乐网 | 一本大道久久久久精品嫩草 | 亚洲精品久久久久9999吃药 | 国产性xxx | 透视性魅力 | 中文字幕第一页久久 | 天天拍夜夜操 | 久久精品亚洲国产奇米99 | 欧美国产精品一二三 | 黑人做爰xxxⅹ性欧美有限公司 | 精品国产一区二区三区久久久 | 久草热播| a级免费毛片 | 国产又黄又爽刺激的视频 | 精品视频久久久久 | av美女网站| 欧美xxxx黑人又粗又长密月 | 日本三级全黄少妇三2023 | 欧美少妇15p | 国产精品久久久一区二区三区 | 成人av影院 | 亚洲欧美精品在线 | 亚洲国产视频一区 | 日本色影院 | 亚洲国产成人一区二区精品区 | 久久成人人人人精品欧 | 国产免费无遮挡吸奶头视频 | 国产极品美女高潮抽搐免费网站 | 3d动漫精品h区xxxxx区 | 97成网| 欧美激情一区二区三区 | 美国三级欧美一级 | 一区二区三区综合 | www.91色.com| 国产对白不带套毛片av | 91porn国产成人福利 | 色播av在线 | 色激情网| 国产精品香蕉在线观看 | youjizz在线视频 | 91美女片黄在线观看成欢阁 | 国精品人妻无码一区二区三区蜜柚 | 狠狠88综合久久久久综合网 | 国产一级黄色av | 合欢视频污 | 亚洲高清揄拍自拍午夜婷婷 | 青青久在线视频 | 快射视频在线观看 | 国产系列在线观看 | 成年免费视频黄网站zxgk | 少妇性做爰xxxⅹ性视频 | 色综合九九| 成人黄色免费网址 | 国产伦子真实事例对白 | 国产精品国产三级国产专播品爱网 | 第一136av福利视频导航 | 仙踪林毛片 | 亚洲人成一区二区 | 国产成人精品一区二 | 亚洲最大成人综合网 | 国精产品乱码视频一区二区 | 在线只有精品 | 国产精品入口牛牛影视 | 伊人av影院| 黄色激情av| 久久久久久久.comav | 亚洲国产成人久久精品大牛影视 | 日产国产亚洲精品系列 | 久久人人爽人人人人爽av | 国产强伦人妻毛片 | 亚洲精品91 | 欧洲精品码一区二区三区 | 懂色av一区二区 | 欧美性受视频 | 天天艹av| 免费簧片在线观看 | 成人做受黄大片 | 免费观看黄色一级片 | 国产成人精品综合在线观看 | 久久久久久久久久久影院 | 久久av一区二区三区 | 正在播放凉森玲梦88av | 白白嫩嫩的美女无套内谢 | 伊人春色在线观看 | 亚洲经典千人经典日产 | 在线观看1区 | 亚洲欧洲av无码专区 | 天天爽夜夜爽视频 | 99国产精品欧美久久久久的广告 | 五月激情婷婷丁香综合基地 | 国产乱子伦无套一区二区三区 | 久久无码人妻热线精品 | 日韩有码中文字幕在线观看 | julia一区二区在线播放 | 亚洲精品久久久久久 | 最新中文字幕第一页 | 97天天操 | 蜜桃精品视频在线观看 | fc2成人免费人成在线观看播放 | 拔萝卜在线视频免费观看 | www久久99| 国产露脸精品国产探 | 97视频免费 | 婷婷综合av | 日日摸夜夜摸狠狠摸婷婷 | 日批视频免费观看 | 337p人体粉嫩胞高清视频 | 丁香婷婷综合激情五月色 | 久久久成人999亚洲区美女 | 欧美专区第二页 | 久久久久久亚洲精品 | 狠狠色狠狠干 | 成年人免费看黄色 | 99精品国产免费久久久久久按摩 | 中国免费黄色片 | 亚洲女优在线 | 91成人短视频免费版 | 国产中文自拍 | 特级毛片在线大全免费播放 | 欧美日韩在线观看一区 | 日本韩国欧美中文字幕 | 最新在线视频 | 天躁狠狠躁| 日本三级中国三级99人妇网站 | 大肉大捧一进一出视频出来呀 | 爱情岛aqdlt国产论坛 | 国产精品 日韩精品 | 国产又色又爽无遮挡免费动态图 | 一区二区三区日韩视频在线观看 | 欧美精品黄 | 真人真事免费毛片 | 久久久欧美精品sm网站 | 无码人妻视频一区二区三区 | 内射合集对白在线 | 97人人人| 最新免费av网址 | 91巨炮在线 | 国产乱码精品一区二区三区五月婷 | 18禁黄网站禁片免费观看 | 国产高清在线不卡 | 国产欧美精品一区二区三区四区 | 黑人与日本少妇 | 成人一级网站 | 日日碰狠狠躁久久躁综合小说 | caoporm超碰国产精品 | 亚洲欧美日本在线观看 | 亚洲一区播放 | 美女mm131爽爽爽免费动视频 | 最新国产小视频 | 色偷偷中文字幕 | 精品一区二区三区四区五区六区 | 91av综合| 久久国产精品精品国产色婷婷 | 91精品乱码久久蜜桃 | 国产精品一区二区久久国产 | 777色婷婷视频二三区 | 中文字幕一区二区三区人妻少妇 | 中文字幕永久有效 | 性视频黄色 | 成年女人免费视频播放体验区 | 国内a∨免费播放 | 性欧美视频在线观看 | 一区二区三区在线视频免费观看 | 婷婷成人在线 | 狂虐性器残忍蹂躏 | 国产av无码专区亚洲awww | 狠狠干性视频 | 亚洲熟妇久久精品 | 国产 欧美 视频一区二区三区 | 久久精品无码精品免费专区 | 狠狠操很很干 | 午夜伦理av | 新国产视频 | 亚洲精品色在线网站 | 日本高清视频在线播放 | 国模裸体无码xxxx视频 | 国内自拍视频在线观看 | 国产情侣出租屋露脸实拍 | 性欧美高清 | 久草视频资源 | av毛片在线免费看 | 亚洲玉足av久久影视 | 一级黄色免费网站 | a免费毛片 | 亚洲国产97在线精品一区 | 国产精品人妖ts系列视频 | 成人免费毛片果冻 | 成人精品视频99在线观看免费 | 日韩黄色在线观看 | 热久久久久久久 | 日韩一本在线 | 女人被做到高潮免费视频 | videosg最新另类大全 | 精品亚洲国产成人 | 大陆女明星裸体毛片 | 尼姑福利影院 | 日日碰狠狠躁久久躁2023 | 成 年 人 黄 色 大 片大 全 | 日韩精品手机在线 | 中文在线а√在线 | 国产精品美女久久久久久久 | 国产性av在线 | 久久中文字幕伊人小说小说 | 亚洲乱亚洲乱妇50p 亚洲va中文字幕无码久久不卡 | 真人性囗交69视频 | 一级黄色片在线 | 国产精品白虎 | 97人人模人人爽人人喊网 | 最新中文字幕2019 | 日韩av在线一区二区三区 | 久久久久久欧美 | 欧美性猛交久久久乱大交小说 | 在线观看国产精品普通话对白精品 | 欧亚日韩精品一区二区在线 | 亚洲国产精品高潮呻吟久久 | 狠狠色噜噜狠狠狠四色米奇 | 亚洲欧洲成人精品香蕉网 | 性猛色xxxxx富婆 | 久久看毛片 | 人妻av一区二区三区精品 | 亚洲熟妇色xxxxx亚洲 | 国产美女精品 | 午夜精品亚洲 | 真实的国产乱xxxx在线 | 亚洲成人在线网 | 超碰神马 | 伊人久久无码中文字幕 | h小视频在线观看 | 99久久无色码中文字幕人妻蜜柚 | 欧美黄色成人 | 成人美女黄网站色大免费的 | 奇米影视777四色 | 青青青免费视频在线 | 欧美丰满熟妇hdxx | 乱码人妻一区二区三区 | 亚洲精品综合在线 | 波多野结衣一区二区三区高清 | 中文字幕精品一区久久久久 | 少妇高潮毛片免费看 | 午夜国产一区二区三区四区 | 老子午夜精品无码不卡 | 无码日韩人妻精品久久蜜桃 | 日本草逼视频 | 久久久久久a亚洲欧洲av冫 | 午夜丰满少妇性开放视频 | 深夜福利视频在线 | 少妇思春三a级 | 成人啪啪免费网站 | 手机永久免费av在线播放 | 日本高清视频一区 | 好大好湿好硬顶到了好爽视频 | 97狠狠干| 50一60岁老妇女毛片 | 久热免费在线视频 | 2020最新国产自产精品 | 日本精品免费视频 | 久久免费精品国自产拍网站 | 久久福利社 | 亚洲国产欧洲综合997久久, | 国产精品国产成人国产三级 | 日本熟妇人妻xxxx | 日本视频久久 | 成人免费看www网址入口 | 久产久精国产品 | 国产精品有码无码av在线播放 | 久艹视频在线观看 | 91精彩刺激对白露脸偷拍 | 日韩欧美国产另类 | 亚洲色精品三区二区一区 | 国产女人18毛片水真多1 | www.四虎影视 | 精品国产乱码久久久久久精东 | 黄色片免费观看视频 | 国产一级免费在线观看 | 女高中生自慰污污网站 | 免费成人高清在线视频 | 91精品久久久久 | 国产成人精品免费 | 区一区二区三区中文字幕 | 色九九九 | 久久九九日本韩国精品 | 少妇又紧又色又爽又刺激视频 | 中文字幕在线不卡一区二区 | 国产综合自拍 | 亚洲精品99久久久久中文字幕 | 欧美va亚洲va | 羞羞视频在线观看 | 一级黄色小视频 | 免费成人在线观看视频 | 日本肥老熟hd| 国产成人精品日本亚洲专区61 | 免费观看成人毛片 | 欧州一区 | 无码任你躁久久久久久久 | 久久天天躁狠狠躁夜夜婷 | 亚洲精品大片www | 国产精品久久久久7777 | 国产亚洲婷婷香蕉久久精品 | 国内精品久久久久久久久久清纯 | 亚洲成av人片在线播放无码 | 成人妇女免费播放久久久 | 影音先锋男人资源网站 | 少妇丰满尤物大尺度写真 | 欲妇荡岳丰满少妇岳 | 黄色大片91 | 在线视频你懂得 | 啪啪激情网 | 色性网|