大学导师想让我通过LABVIEW 的DLL 对外部原件(WAVEFORM GENERATOR TTi1241) 的功能稍加修改, 外部原件与电脑通过GPIB线相连,修改功能大致为: 例如设置10V
2013-02-19 06:48
亲爱的xilinx工程师, 我正在进行GTX IP核心仿真,但有些问题让我感到困惑。为简单起见,我只进行TX模拟(No 8B / 10B编码器)。在我的test_bench文件中,有许多输入如下:TILE0_CLKIN_IN;TILE0_GTXRESET_IN; TILE0_TXDATA0_IN; TILE0_TXDATA1_IN; TILE0_TXRESET0_IN; TILE0_TXRESET1_IN; TILE0_TXUSRCLK0_IN; TILE0_TXUSRCLK1_IN; TILE0_TXUSRCLK20_IN; TILE0_TXUSRCLK21_IN我不知道如何输入这些端口的信号来完成我的模拟。谢谢 !
2020-06-18 11:37
LTE是在OFDM调制之后成帧?那么各天线端口如何映射到10ms帧上?
2023-05-16 16:36
HSUPA是什么?怎样去测试HSUPA功能?
2021-05-11 07:09
我有Lora技术评估套件900DV164140-2(网关核心板、网关子板和2-RN2903 Mote板(DM164139)。为了便于使用,我想给mote发送一条消息,该消息带有一个命令,当RN2903接收到该消息时,该命令将响应它的下一次发送有效负载,该有效负载包含以下内容:Time消息是receivedTime消息;NRI已经浏览了RN2903 LoRa™技术模块命令参考用户指南,但是没有看到包含我所寻找的所有内容的命令。因为我找不到允许重新编程的固件/软件,我想知道是否有其他可用的命令(可能用于测试)可以提供这些信息,但是没有列在上述文档中?我有没有正确的RN2903板或我需要得到另一个,如果是的话,哪一个? 以上来自于百度翻译 以下为原文 I have the Lora Technology Evaluation Kit 900 DV164140-2 (Gateway Core board, Gateway daughter board, and 2- RN2903 Mote boards (DM164139). For my use, I want to send the mote a message with a command that when received by the RN2903 will answer on its’ next transmit a payload containing the following:Time message was receivedTime message was sent by the gatewayThe gateway ID that sent the messageThe received message signal strengthSNRI’ve looked through the RN2903 LoRa™ Technology Module Command Reference User’s Guide but do not see a command that contains all of what I’m looking for.Since I can’t find firmware/software that might allow reprogramming, I wondered if there are additional commands available (maybe used for testing) that would provide me with this information but not listed in the mentioned document? Do I have the correct RN2903 board or do I need to get another one and if so which one?
2019-06-11 13:28
我最近在我的开发板上替换了PIC32 MX440-512。我能把它编程好5到10次,但是突然我不能编程它。但是MCU似乎还行——它仍然愉快地运行我今天早些时候编程的最后一个固件。我的真正的冰说:我在ICSP连接器的所有引脚上三次检查连续性。然后我尝试了一个ICD3(用一个新的电缆):正如我所说的,PIC32仍然在快乐地运行最后一个固件。我使用MPLAB X IDE来尝试编程(调试)它。 以上来自于百度翻译 以下为原文 I recently replaced the PIC32MX440-512 on my development board. I was able to program it fine 5 or 10 times, but then suddenly I can't program it. Yet the MCU seems OK - it's still merrily running the last firmware I programmed onto it earlier today. My REAL ICE says:The following memory area(s) will be programmed:program memory: start address = 0x0, end address = 0xcfffboot config memoryconfiguration memoryDevice Erased...Programming...Failed to program deviceTarget removedTarget voltage detectedTarget Device ID (0xfc000) is an Invalid Device ID. Please check your connections to the Target Device.REAL ICE removedTransmission on endpoint 2 failed I triple-checked continuity on all pins of the ICSP connector. Then I tried a ICD3 (with a new cable):*****************************************************Connecting to MPLAB ICD 3...Currently loaded firmware on ICD 3Firmware Suite Version.....01.43.35Firmware type..............PIC32MXTarget voltage detectedUnable to connect to the target device.Failed to get Device ID As I said, the PIC32 is still happily running the last firmware loaded. I'm using MPLAB X IDE to try to program (and debug) it. What could cause this?
2019-03-15 15:13
锥形量热仪是测量材料对火反应特性或燃烧特性的最好技术手段,可测量多种火灾相关参数.它的燃烧环境极相似于真实的燃烧环境,其试验结果与大型燃烧测试结果之间存在很好的相关性,能够表征出材料的燃烧性能,是新一代的聚合物材料燃烧性能测定仪器。
2019-10-11 09:00
4G 的到来仿佛还在昨日,5G 却已近在咫尺。根据3GPP 的规划,5G 的大规模测试和部署,最早将于2019 年开始。也就是说,最快还有一年多的时间,我们就可以享受到5G 带来的全新体验。然而作为全球通信标准,5G 的意义当然不局限于网速更快,移动宽带体验更优,它的使命在于连接新行业,催生新服务,比如推进工业自动化、大规模物联网、智能家居、自动驾驶等。这些行业和服务都对网络提出了更高的要求,要求网络更可靠、低时延、广覆盖、更安全。各行各业迥异的需求迫切呼唤一种灵活、高效、可扩展的全新网络。5G 应运而生。图1:5G 的应用领域作为下一代蜂窝网络,5G 网络以5G NR (New Radio) 统一空中接口(unified air interface)为基础,为满足未来十年及以后不断扩展的全球连接需求而设计。5G NR 技术旨在支持各种设备类型、服务和部署,并将充分利用各种可用频段和各类频谱。显然,5G NR 的设计是一项大工程,搭建5G NR 不可能也不必从零开始,事实上,5G 将在很大程度上以4G LTE 为基础,充分利用和创新现有的先进技术。Qualcomm 认为,要实现5G NR 的搭建,有三类关键技术不可或缺——1. 基于OFDM 优化的波形和多址接入(Optimized OFDM-based waveforms and multiple access,Orthogonal Frequency Division Multiplexing,正交频分复用),2. 灵活的框架设计(A flexible framework),3. 先进的新型无线技术(Advanced wireless technologies)。图2:5G NR 关键技术
2019-06-18 08:16
分享一种TD-SCDMA系统基带发送方案
2021-06-01 06:52
你好设计如下(i).FPGA通过UART等待来自PC的数据(ⅱ)。从PC接收数据(三)。通过验证保留关键字,检查PC是否已完全传输数据(iv).FPGA等待来自PC的命令将数据传输回PC(v)。停止状态后路线模拟工作正常,满足所有约束条件我实现设计后遇到了问题。电路板由设置为6.0 V和400 mA的电源供电。我也使用FTDI芯片与PC接口一旦我开始从PC发送数据,输入电压下降到3.9 V,电流达到430 mA。我在UART的另一个设计中使用了相同的FTDI芯片,没有这样的问题HDL设计是否会使电路板过载? 。任何帮助,将不胜感激 ?谢谢费萨尔以上来自于谷歌翻译以下为原文Hi Design is as follows (i).FPGA waits for data from PC via UART (ii). Receives the data from PC (iii). Check whetherPC has transferred the data completely by verifying the reserved keyword (iv).FPGA Wait for command from the PC to transfer the data back to PC (v).Stop state Post route simulation works fine and all the constraints met I have encountered a problem once I implement the design. Boardis powered from a power supply with settings 6.0 V and 400 mA. Also I am using FTDI chip to interface with PC Once I start to send the data from PC, Input voltage drops down to 3.9 V and current reaches 430 mA. I have used same FTDI chip in another designs with UART, No such problems Does HDL designmakes the board over loaded ? . Any help would be appreciated ? Thanks Faisal
2019-05-31 14:33