嗨罗伯特，你能推荐一下吗？合适的相机最小尺寸，H264压缩由Raspberry Pi3连接和控制？适用于Raspberry Pi 3 B控制和相机命令的软件？谢谢彼得以上来自于谷歌翻译以下为原文Hi Robert, can you please recommendsuitable camera smallest footprint, H264 compression to be connected and controlled by Raspberry Pi3?Suitable software for Raspberry Pi 3 B control and command of camera(s)?thank youPeter
2018-10-23 11:41
我正在使用Excel 2013和Window 7.我创建了一个Scatter Chart。但垂直网格线的颜色非常浅（浅）。我尝试用Excel的宏编辑图表，然后将其翻译成VEE 9.32。但是VEE 9.32没有名为RGB（）的库。因此垂直网格颜色仍然不是黑色。 Sub Macro2（）''Macro2 Macro''ActiveChart.Axes（xlValue）.MajorGridlines.Select ActiveChart.SetElement（msoElementPrimaryCategoryGridLinesNone）ActiveChart.SetElement（msoElementPrimaryCategoryGridLinesMajor）ActiveChart.Axes（xlValue）.HasMajorGridlines = True ActiveChart.ChartArea.Select ActiveChart.Axes （xlValue）.MajorGridlines.Select ActiveChart.Axes（xlValue）.MajorGridlines.Select With Selection.Format.Line .Visible = msoTrue .ForeColor.RGB = RGB（0,0,0）// VEE没有RGB（）;结束于Selection.Format.Line .Visible = msoTrue .ForeColor.ObjectThemeColor = msoThemeColorText1 .ForeColor.TintAndShade = 0 .ForeColor.Brightness = 0.Transparency = 0 End With End Sub请指教。谢谢。 以上来自于谷歌翻译 以下为原文I am using Excel 2013 and Window 7.I created a Scatter Chart. But the Vertical Grid lines' colors are very shallow (light). I tried to edit the Chart with Excel 's Macroand then translate it into VEE 9.32.But VEE 9.32 does not have a library called RGB().So the vertical Grid color is still not black. Sub Macro2() ' ' Macro2 Macro ' ' ActiveChart.Axes(xlValue).MajorGridlines.Select ActiveChart.SetElement (msoElementPrimaryCategoryGridLinesNone) ActiveChart.SetElement (msoElementPrimaryCategoryGridLinesMajor) ActiveChart.Axes(xlValue).HasMajorGridlines = True ActiveChart.ChartArea.Select ActiveChart.Axes(xlValue).MajorGridlines.Select ActiveChart.Axes(xlValue).MajorGridlines.Select With Selection.Format.Line .Visible = msoTrue .ForeColor.RGB = RGB(0, 0, 0)// VEE does not have RGB(); End With With Selection.Format.Line .Visible = msoTrue .ForeColor.ObjectThemeColor = msoThemeColorText1 .ForeColor.TintAndShade = 0 .ForeColor.Brightness = 0 .Transparency = 0 End With End Sub Please advise. Thanks.附件Plex6675.xlsx14.5 KB
2019-01-28 15:18
way to do this in the 4285A. I suspect the accuracy would improve for thinner samples and higher
2018-10-15 11:20
to match LDMOS drain (Attached asTwo_port). This is a wider and thinner tracks as shown in the attached
2019-01-14 15:01
我们正在使用VL53L0X IR飞行时间传感器开发产品。传感器必须位于塑料外壳内，透过IR透射窗口材料。为了测试这样的布置，X-NUCLEO-53L0A1配有气隙垫片和覆盖玻璃材料。我想知道这种玻璃材料是什么，你能给出制造商名称，产品/产品名称或其他什么吗？ ＃vl53l0x-X-细胞核 - 53l0a1以上来自于谷歌翻译以下为原文 We are developing a product using the VL53L0X IR Time-Of-Flight sensor. The sensor must be inside a plastic case looking through a IR transmissible window material. To test such an arrangement the X-NUCLEO-53L0A1 comes with airgap spacers and cover glass materials. I would like to know what this cover glass material is, can you give a manufacturer name, article/product name or something?#vl53l0x-x-nucleo-53l0a1
2019-06-12 07:15
你好！，我开始使用FX3设备设计一个新的布局。我仔细阅读了FX3的硬件指南，仍然不能理解两件事：1）对于超高速微带线，建议采用11MIL轨迹宽度和8MIL空间。从开发工具包的Fab绘图，我看到有一个奇怪的堆叠产生一个90欧姆差动阻抗（边缘耦合）在这些线与12MIL跟踪和8密耳空间。这一切都很好，但不幸的是，它造成了相当大的19MIL 50欧姆单端痕迹！我有一个相当紧凑的设计，所以我需要合理的5-8密耳50欧姆痕迹的顶部和底部的路由。为什么选择堆栈来提供这些大的跟踪？有没有我不考虑的损失因素？我有一个堆叠，将给予90欧姆边缘耦合差分阻抗与一个6/8 / 6MIL微带。2）B型路由：我决定使用更坚固的全尺寸B型连接器，到目前为止，这是一个相当痛苦的经历。将路由（如附件显示）保持在与连接器相同的一侧是否非常不明智？我知道一个“存根”是由这个创造出来的，但我不知道如何衡量它的效果。是否更好地运行所有这些信号通过一组通孔，如建议（与地面通孔适当间隔）？在我看来，引入层更改比存根创建最糟糕，但我肯定希望听到某人的知情意见。我很想听听专家的意见，谢谢！史提夫M路由选择FX3.JPG135.7 K 以上来自于百度翻译 以下为原文Hello!, I'm starting a new layout of a design using the FX3 device. I've carefully read the Hardware Guidelines for the FX3 and still cannot understand a couple things: 1) There is a recommendation of a ~11mil trace width and a 8mil space for the superspeed microstrip lines. From the development kit's fab drawing, I see that there is a bit of a bizarre stackup which yields a 90 Ohm differential impedance (edge-coupled) on these lines with a 12mil trace and 8 mil space. This is all fine, but unfortunately it causes some fairly large 19mil 50-ohm single ended traces! I have a fairly tight design, so I need reasonable ~5-8mil 50 Ohm traces on the top and bottom layers for routing. Is there a reason why the stackup was chosen to give these large traces? Is there a loss factor that I am not considering? I have a stackup that will give the 90 Ohms edge-coupled differential impedance with a ~6/8/6mil microstrip. 2) B-Type routing: I've decided to use a more rugged full size b-type connector and it is been a fairly painful experience so far. Would it be very unwise to keep the routing (as the attachment shows) on the same side as the connector? I understand that a 'stub' is created from this, but I have no idea on how to gauge the effect. Would it be better to run all of these signals through a set of vias, as recommended (with the ground vias appropriately spaced)? In my mind, it seems that introducing the layer change would be worst than the stub created, but I would definitely like to hear someone's informed opinion. I would definitely like to hear from the experts on this one, thank you! Steve M. Routing FX3.jpg 135.7 K
2019-05-20 13:12
你好步进电机控制器L6480上的异常过电流检测行为。在初始化之后，给出硬停止命令来保持步进电机，这似乎工作正常，所有预期的波形出现在晶体管的栅极上。当给出128个微步的移动命令时，桥接器脱离，状态寄存器中没有错误。在硬HiZ命令和另一个硬停止命令之后，状态寄存器显示过电流故障和缺相A和B故障！我该如何克服这种情况？注册设置：CONFIG = 0x3880（PWM div fact = 2，PWM mul fact = 1.75，VCCVAL = 7.5，UVLOVAL = 6.3，过流检测时桥接关闭）GATECFG1 = 0x04FD（WD_EN禁用，TBOOST = 375ns，IGate = 96mA，TCC = 3750ns）GATECFG2 = 0xE2（TBLANK = 1000ns，TDT = 375ns）STEP_MODE = 0x07（128微步）OCD_TH = 0x1F（1V，最大值）KVAL_HOLD = 0x25（0.15xVs，其中Vs = 13V）KVAL_RUN = 0x52（0.33xVs，其中Vs = 13V）KVAL_ACC = 0x64（0.4xVs，其中Vs = 13V）KVAL_DEC = 0x32（0.2xVs，其中Vs = 13V）MAX_SPEED = 0x34（800步/秒）MIN_SPEED = 0x00（0步/秒）ACC = 0x89（2000步/秒^ 2）DEC = 0x89（2000步/秒^ 2）FS_SPD = 0xA0（2449步/秒） 使用的晶体管都是IRF520N（100V，9.7A，RDSon = 0.2欧姆，Qg总栅极电荷=最大25nC）。晶体管的选择集中在低栅极电荷上。 STB35NF10的使用也不太成功，因为典型的55nC总栅极电荷较高，尽管RDSon仅为0.035欧姆。任何建议欢迎。最好的祝福以上来自于谷歌翻译以下为原文 HiAbnormal over current detection behaviour on stepper motor controller L6480. After initialization a hard stop command is given to hold the stepper motor, which seems to work just fine, all the expected waveforms appear on the gates of the transistors. When a move command of 128 micro-steps are given the bridge disengaged with no errors in the status register. After a hard HiZ command and another hard stop command the status register shows an over current fault and phase loss A and B faults! How do I proceed to overcome this situation?Register setup:CONFIG = 0x3880 (PWM div fact=2, PWM mul fact=1.75, VCCVAL=7.5,UVLOVAL=6.3,Bridge shut down on over current detection)GATECFG1 = 0x04FD (WD_EN disabled, TBOOST=375ns, IGate=96mA, TCC=3750ns)GATECFG2 = 0xE2 (TBLANK = 1000ns, TDT=375ns)STEP_MODE = 0x07 (128 microsteps)OCD_TH = 0x1F (1V, the maximum)KVAL_HOLD = 0x25 (0.15xVs where Vs=13V)KVAL_RUN =0x52 (0.33xVs where Vs=13V)KVAL_ACC= 0x64 (0.4xVs where Vs=13V)KVAL_DEC = 0x32 (0.2xVs where Vs=13V)MAX_SPEED = 0x34 (800 steps/s)MIN_SPEED = 0x00 (0 steps/s)ACC = 0x89 (2000 steps/s^2)DEC = 0x89 (2000 steps/s^2)FS_SPD = 0xA0 (2449 steps/s) The transistors used are all IRF520N (100V, 9.7A, RDSon = 0.2 ohm, Qg total gate charge = 25nC max).Choice of transistors focused on the low gate charge. STB35NF10 were also used with less success due to the higher total gate charge of 55nC typical, although the RDSon is a mere 0.035 ohm.Any advise welcome.Best regards
2019-06-04 14:39
所以由于缺乏回复我不得不重新解释我的问题...我对ADS很新。我试图在ISM范围（2.4 GHz）中模拟贴片天线。我不确定我的端口是否设置正确。我发现的一些例子不使用显式接地参考引脚。但感觉我们需要它们，因为我们移除了无限的接地板。当我设计一个其他人所做的天线示例时，我没有得到任何类似的东西。请帮助我也收到这些警告：---警告------------------------------------- ------------------------------ 2D端口求解器数据不可用，使用传输线的默认值（50欧姆）参数。 - - 警告 - - - - - - - - - - - - - - - - - - - - - - - --------------------- S参数端口1的加号引脚的大小在9.19695 GHz以上电气大，S参数可能变得非物理。 -------------------------------------------------- - - - - - - - - - - - - - - - - - 警告 - - - - - - - - - -------------------------------------------------- S参数端口1的负引脚的大小在9.19695 GHz以上电气大，S参数可能变得非物理。 -------------------------------------------------- - - - - - - - - - - - - - - - - - 警告 - - - - - - - - - --------------------------------------------------端口1的布局引脚之间的距离在3.53729 GHz以上电气大，S参数可能变得非物理。我使用的是ADS 2014.底物是聚酰亚胺，铒：3.5，tanD：0.003。厚度为25微米（1密耳）导体的导电率为6e4西门子/米，厚度为1微米，背面没有无限接地板，而是在传输线的每一侧都有CPW接地。尺寸（mm）：天线块：20 x 20传输线：6 x 8 CPW：10 x 5.6 Gap CPW /传输：1 Gap CPW /天线：2我有连接端口配置等...我的引脚是线/区类型任何帮助非常感谢。我需要进行无差错仿真，这样我就可以进行参数研究并制作天线进行分析。我也认为阶段结果很奇怪。对此有何评论？ ***编辑：midosi于2014年7月18日上午7:37 Ports.jpg393.5 KBS11 Results.jpg248.4 KB 以上来自于谷歌翻译 以下为原文So I had to rephrase my problem due to lack of replies... I am very new to ADS. I am trying to simulate a patch antenna in the ISM range (2.4 GHz). I am not sure if my ports are setup correctly. A few examples I found do not use explicit ground reference pins. But it feels like we need them because we remove the infinite ground plate. When I design an antenna example that someone else did, I dont get anything similar. Please help I am also receiving these warnings: --- WARNING ------------------------------------------------------------------- The 2D port solver data is not available,using default values (50 Ohm) for the transmission line parameters. --- WARNING ------------------------------------------------------------------- The size of the plus pin for S-parameter port 1 is electrically largeabove 9.19695 GHz, S-parameters may become unphysical. ------------------------------------------------------------------------------- --- WARNING ------------------------------------------------------------------- The size of the minus pin for S-parameter port 1 is electrically largeabove 9.19695 GHz, S-parameters may become unphysical. ------------------------------------------------------------------------------- --- WARNING ------------------------------------------------------------------- The distance between the layout pins for port 1 is electrically largeabove 3.53729 GHz, S-parameters may become unphysical. I am using ADS 2014. Substrate is Polyimide with er: 3.5 and tanD: 0.003. Thickness is 25 microns (1 mil) Conductor has a conductivity of 6e4 Siemens/m and a thickness of 1 micron I don't have an infinite ground plate at the back, instead I have CPW grounds at each side of the transmission line. Dimensions (mm): Antenna Block: 20 x 20Transmission Line: 6 x 8 CPW: 10 x 5.6 Gap CPW/Transmission: 1 Gap CPW/Antenna: 2 I have attached port configuration and etc... My pins are line/area type Any help is greatly appreciated. I need to have error free simulations so I can make parameter study and fabricate an antenna for analysis. I also think that phase results feel odd. Any comments on that? ***Edited by: midosi on Jul 18, 2014 7:37 AM附件Model CPW.jpg449.6 KBPorts.jpg393.5 KBS11 Results.jpg248.4 KB
2018-11-28 10:47
我有一个85052B 26.5 GHz标准校准套件。 85052B 3.5 mm套件的系数在我的VNA固件中。以开路为例，我看到：C0 = 49.433，C1 = -310.13，C2 = 23.168，C3 = -0.15966偏移延迟= 29.243 ps等我明白这些意味着什么。这些非常相似，但*与*给出的那些相同，无论是在http://na.tm.agilent.com/pna/caldefs/PNA/85052B.htm给出的那些，我的8720D的固件（版本7.74）使用偏移量延迟为29.243 ps，在那个页面中它显示为29.2 ps的PNA，所以有43 fs的差异，这是相当小的，虽然我很困惑为什么它存在。无论如何，这是一个小问题。现在到了更重要的问题。当然我有时使用SMA设备，我知道SMA和3.5毫米之间存在一些电气不匹配，可以通过去嵌入来解决，尽管我从未真正研究过它。但是有更简单的方法来测量SMA设备吗？查看带有* PNA *系列的85052B校准套件的HTML页面，http：//na.tm.agilent.com/pna/caldefs/PNA/85052B.htm我看到的标准比固件中的标准要多得多我的8720D。例如，PNA列表中的标准＃9具有这些*非常*不同的电容系数，用于“3.5 mm / SMA公开”C0 = 5.9588，C1 = -11.195，C2 = 0.5076，C3 = -0.00243 C0项已更改为超过8的因素，从49.433 fF到5.9588 fF。我猜*如果测量SMA设备而不是3.5毫米设备，则应该使用不同的系数集，并且*可能* HTML页面具有可用的幻数。我是对的，还是我“失去了情节”？如果在测量SMA设备时，最好使用一组不同的系数，我想使用它们。我意识到8720D仅限于8个标准，因此我无法定义8510或PNA上的数量，但没有什么可以阻止我为SMA定义另一个校准套件，如果我只知道如何解释这些给出的数字PNA如何解释PNA的这些值。例如，标准＃9（“3.5 mm / SMA男性打开”）究竟是什么？http://na.tm.agilent.com/pna/caldefs/PNA/85052B.htm实际上是什么意思？更复杂的是，标准＃18（“2.92 mm / SMA女性打开”）到底意味着什么？例如，如果我想用我的3.5 mm校准套件测量SMA母设备，那么为开放定义的最佳系数是多少？我希望如果我有一个PNA，这对我来说会更明显，但我不禁感觉我的8720D中的用户校准套件会做同样的工作。戴夫 以上来自于谷歌翻译 以下为原文I've got an 85052B 26.5 GHz standard calibration kit. The coefficients for the 85052B 3.5 mm kit are in the firmware of my VNA. Taking the example of the opens, I see: C0=49.433, C1=-310.13, C2=23.168, C3=-0.15966 offset delay = 29.243 ps etc I understand what all those mean. These are very similar, but *not* identical to those given for the PNA at http://na.tm.agilent.com/pna/caldefs/PNA/85052B.htm The firmware (version 7.74) for my 8720D use an offset delay of 29.243 ps, and in that page it shows 29.2 ps for the PNA, so there is a difference of 43 fs, which is pretty small, although I'm puzzled why it exists. Anyway, that is a minor issue. Now to the more important issue. Naturally I sometimes use SMA devices, and I know there is some electrical mis-match between SMA and 3.5 mm, which one could resolve by de-embedding, although I've never actually looked into it. But is there a simpler way of measuring SMA devices? Looking at the HTML page for this 85052B cal kit with the *PNA* series, http://na.tm.agilent.com/pna/caldefs/PNA/85052B.htm I see a lot more standards than are in the firmware of my 8720D. For example, standard #9 in the PNA list has these *very* different capacitance coefficients for "3.5 mm/SMA male open" C0=5.9588, C1=-11.195, C2=0.5076, C3=-0.00243 The C0 term has changed by a factor of more than eight, from 49.433 fF to 5.9588 fF. I'm *guessing* one should use a different set of coefficients if measuring SMA devices, rather than 3.5 mm devices, and *perhaps* that HTML page has the magic numbers to use. Am I right, or have I "lost the plot"? If a different set of coefficients are preferable when measuring SMA devices, I would like to use them. I realize the 8720D is limited to 8 standards, so I can't define as many as on an 8510 or PNA, but there is nothing stopping me defining another cal kit for SMA, IF I only knew exactly how to interpret those numbers given for the PNA How do I interpret those values for the PNA. For example, what exactly does standard #9 ("3.5 mm/SMA male open") here http://na.tm.agilent.com/pna/caldefs/PNA/85052B.htm actually mean? Even more complicated, what exactly does standard #18 ("2.92 mm/SMA female open") mean? If for example I wanted to measure an SMA female device with my 3.5 mm cal kit, what are the optimal coefficients to define for the open? I expect if I had a PNA, this would be more obvious to me, but I can't help feeling a user cal kit in my 8720D would do the same job. Dave
2018-12-03 10:05
