Measurement of jitter in hungry current CMOS VCO

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• How do you measure the NI 9505-"meaning current"?

  I have a cRIO module 9505 and a closed loop current control FPGA program is roughly based on the help file OR: ...\examples\CompactRIO\Module Specific\NI 9505\Current Loop\Current loop - .vi NI 9505 (FPGA).

  In both cases, and in my program, reported current (node of FPGA IO 'current sense") is an integral part of the control scheme, but I don't know units or how the number is measured.  (The documentation leaves a bit to be desired)

  The following comment in the file example FPGA 9505 confused me:

  "The AI Trig is used to trigger the current sampling. Sampling occurs at
  half the cycle PWM time (big time). There are 9 clock cycles, in this example,
  from the time a trigger is sent until the current is actually sampled. Therefore, a
  trigger is sent 9 clock cycles before the desired sampling point. »

  From this comment, it seems that the current I/O node sense is back from the instantaneous current.  However, because the signal from the motor control PWM, the current during the time must always be the same.  A signal PWM is either on or off.  If I only trigger a reading over time, my duty cycle should be relevant, right?  So, how would this function loop control?  Either "current" value is not instant or I understand the purpose of the "AI Trig" boolean.

  Second, how the number of cycles of clock between the trigger and the "current sense" read is known?  The comment says exactly 9 clock cycles.  I know that the FPGA and RT are deterministic, but how a programmer can know the trigger with this amount of precision delay?

  Thank you

  Ethan

  
  

• Measurement of current and voltage on Agilent B1505A

  Hi all

  I'm learning to program the Agilent b1505A using LabView.  I want to just start with a simple measure of a voltage supply and reading/measure of the voltage and current.

  I was able to analyze the data and apply tension without and the problem.  However, I can't understand how to check the voltage and the current.  I can get it only to record one or the other.

  I don't know how to know everyone is with Flex Agilent controls.  When we look through the manual, I see that there is a CMM order that sets the mode of operation of EMS measure.  I put it in mode 4, which measures both, but it still does not work.

  Anyone who is familiar with the use of LabView to parameter program Agilent analyzers?

  I got my code and the manual of the order of Flex of Agilent.

  Thank you.

  I think I found my problem!

  It is in the FMT command that specifies the format of data output.

  Thank you.

• Too low current performance with USB-6501

  For my measure I connected to an output port (output high voltage, 28 pins) with resistor of 10kOhm to ground (Pin 32). For the active reader to type out in car, I measured a 3.33V voltage and current of 0.33mA. I repeated the same measure with open-drain configuration, which leads to 3.27V and 0.33mA. I use NI-DAQmx and changed the disc type of output with a property node in labview 8.5.1. High-voltage output was generated with labview. In a second step, I put out high voltage with the able Control Panel & automation of DAQmx which led to the same result.

  For my measure I'd wait a current higher return especially for active training mode, since the specification indicates a voltage between 2.8 and 3.6V for 2mA. I don't understand why the output current is not 0.5mA which would lead to 5V.

  If I do the same measure with the + 5V output (PIN 31) source instead of the output port (pin 28), the current is as expected 0.5mA and 4.8V power can be measured.

  For all measurements, I used a NI USB-6501 which has already been tested by an engineer from the Canadian standard.

  Hello James Mc.

  Thanks much for the reply. To reach the CMOS specifications (between 3.5 and 5 v) I add an external pull-up resistance and use to open-drain output ports.

  Kind regards

  Priska Studer

• Offset current SMU 4140

  I use the SMU 4140 to measure the curves of voltage/current for the transistors - it sets a voltage & I read (not necessarily on the same channel).  But I noticed a peculiarity in the data according to the current limit.

  First of all, I get different results if I let him autorange device compared to manually set the current limit.

  In particular, there is a current lag that occurs for differnent current limits.

  In the attached file, the current is allowed to Auto for the Red data and fixed at 100 Ma for data in blue.  [the axes are current drain source - ID- & door - Source voltage VGS]

  Any idea what is the origin of the offset .02mA in the Red data?

  Thank you for following up with an explanation.

  Looks like this resource to answer your question:

  http://digital.NI.com/public.nsf/allkb/EE869FC813944EAC862578F0005519F5

• Optimize on the harmonics to the measured power of P1dB

  How to optimize the harmonics to the measured power of P1dB? Currently, I am doing this with lots of equations but is there a direct way to implement?

  XDB element to measure the power for example the 2nd harmonic by the parameter FUNC_OUT to P ("2f1") and an optimization of the configuration for this goal.

• How to display the voltage and current of synchronously

  Recently, doing a project on the acquizeing voltage and current synchronouly, then display. the design is welding a resistor(1%) 0.5 ohm in NI 6251 entered analog of her HAVE differential, then acquired the differential voltage at the input to convert current. At the same time, I hope to recover the path of analog input voltage. My problem is that the current profile data. Please help me .the program screenshot is show below. ---1. Perhaps you ask why not use no. - a way to get voltage at all port of AI, then in the use of the software less to get a voltage inputs HAVE. in this way, my problem is solved. I try, but the current accuracy is failure. because my current range expect is 1uA ~ 100mA. precision current samll won't be promised if you use simple ways for granted NOR 6251 voltage. NEITHER 6251 device spec (HAVE an absolute precision) (v) nominal range sensitivity absolute Accuracy (uV) 10 1920 112 5 1010 56 2 410 22.8 74 0.2 6.4 0.1 52 6.0 (I want to use this range to measure current samll) - cordially Shawnh.Chen

  shawn1 wrote:
  1. how show the waveform by accumulating 1 d data table, rather than showing all 100 acquisition

  Use a waveform graph.  Graphics keep history, you do not have to accumulate the data.  He does it for you on the screen.

  shawn1 wrote:
  2. What is the minimum unit of identification of the TSC103IPT amplifier? I doubt that the 0.5uA can be identified? (0.5uV = 0.5 ohm * 1uA) Because I can't find anything on the auccary in TSC101IPT datasheet.

  The amplifier is analog.  Thus, he can win anything.  But you should really think about a higher resistance if you really want to measure this small of a current.

• How to build a table of measured data permanently

  Have a good day for everyone,

  I have a problem about the construction of a table permanently. I tried to find the solution for a long time, even if it's a task really simle.

  I want to build a table permanently, virtually:

  I like to read data from a measuring devices and I would like to sotre it one by one, at all times. I made a simple VI to present one where my problem is. The random generator represents the data given the measuring device.

  At currently I am able to store data only 1. When I want to store then that it is crushed.

  Thanks for anyone who can help me.

  Hi LIG.

  no need for a structure business when you can use autoindexing:

  

  Also, the code snippet shows how to convert a number in your reading string. You probably prefer tanks instead of integers...

• Multiple Ukraine power measurement

  Hello

  I use the card Ni SMU 4143. I have a VI that propels a certain voltage level card.  Now, I'm trying to create a separate VI which will only measure the voltage and current on the power supply without a reset provision. I understand that I must "log on" to the device before I use the "power measurement multiple.vi Ukraine", but whenever I use the session initiate, it will my device and set my level of back tension reset. Can you please explain how I can create a VI that measures only the voltage and current without changing their level?

  After the opening, why don't call you the VI that determines the level? Not this separate VI also call the lance function? Think that the flow of data.

• Unable to read the XML of vCO - permission denied

  Hello guys,.

  I was trying to read/write xml workflows vCO files:

  • I set up js - io - right.conf of the vCO server according to: http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.vco_install_config.doc%2FGUID-7C2CFC22-519B-4D38-84F9-00380CEB15CF.html I put the xml file/Orchestrator/or + rwx, where I read the .xml file later. And I even tried to put "+ rwx /Orchestrator/xml/sample.xml". But always I received an error message "Permission denied" VCO when I run the workflow
  • I am currently using vCO 5.1, with higher fees to do what I want.
  • Guest operating system Orchestrator server is SUSE Linux, but that shouldn't be a problem, right?

  I'm kinda stuck here, and I'd like to see if someone else has already encountered this problem before, and how solve you this problem?

  No details on this issue will be appreciated.

  Thank you

  DH

  Odd.

  What is your use cases? This file should accessible from an external system or not? If this does not store the file in a resource element is a better option.

• Error sending measurements: failed to contact Server

  I've been running Hyperic for about 2 months now pretty well. Recently however, I've been see this error on many of my servers customer:
  
  ERROR [SenderThread] error sending measurements: could not contact the server - there is no more free connections
  
  I can't identify what 'connection' is the source of the problem. I shrugged the connections to the BDD postgres integrated as well as the connection for the jboss service pool. None of these changes seem to alleviate my problem... Please help.

  How many agents do you use currently with, and how busy is the HQ Server?

  In this case, the agent tries to send back its measurements, but the server is currently busy processing reports of other officers.  The agent must recover from this situation, as long as other officers achieve their sending data and release a connection.

  If your environment is important, you may need to change the number of incoming connections of attorney who are allowed.  By default, this value is set to 25.  You can find this setting in:

  Server-2.7.3/HQ-engine/server/default/deploy/lather-JBoss.SAR/JBoss-lather.war/Web-INF/Web.XML

  Look for the org.hyperic.lather.maxConns parameter.

  Depending on how high you set this value, you may need to also up the number of database connections that you allow to the integrated database.

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• Summary of measures

  Hello
  I had a new problem.
  I got a report - there is one customer with different projects. For example, customer XY project 3. I have a 'Cost' measure that calculates me the current cost of each project. How I will summarize these values together - that I am a total cost for each customer? I tried the total large option, but it gives me only a total for each project. I use OBIEE 11.1.1.5.0.
  He looks a bit like this:
  
  cost of the year project name
  XY 2011 1101 100 k
  2011 XY 1102 50 k
  2011 XY 1103 85 k
  
  
  Thank you

  Hello
  in the criteria based on the measurement section 'cost' use this SUM (COST PER CLIENT) or the SUM (COST PER CUSTOMER, PROJECT) according to your requirement. where you use the cost, client, project accordingly, as defined in your presentation layer.

  Assign points if found useful.

• CMO JPO JEE6?

  Hello
  I intend to make the CMO JPO and I have a questions are related. The current CMO JPO is based on JEE 5, are there plans for a version of JEE6? It will be available soon? Should I wait for the JEE6? I have my certification within 3 to 4 months. Thank you for your answers and assistance in advance.
  Saad.

  Saad,
  We have no information about EE6. I don't expect that there will be an EE6 option in 3-4 months. Please be aware that if you do not complete your certification prior to October 1, 2011, there will be a requirement for added training the http://bit.ly/gdADK9 path.

  Kind regards
  Brandye Barrington
  Certification Forum Moderator

• Blue screen after Patch Tuesday during HW failure diagnosis

  People,

  I have a HP Pavilion Elite m9357c plus, 6 GB RAM, Windows 7 64-bit edition, with a replaced boot drive (Seagate 1 TB ~1.5 years) and replacemante (Gigabyte with radiator cooling) video card and 1 GB of RAM - also about 1.5 years.  System has a Hauppauge and Windows Media Center Edition video capture card.

  Starting after this last Patch Tuesday (Nov 2014), the system, which has been stable for years, has experienced several BSOD.  After the premiere, I started a full scan of the system with Norton 360, but it blue screened again before the end.

  I then ran an Avira rescue disk, boot from the DVD of Avira scan, scanned all drives and found no problem.  I removed a few old programs to reduce the overall number then ran a registry cleaning.

  Last night after 30 min of streaming video, the screen is dark and came back with another BSOD.  I turned off the system for the evening

  Today, after starting in safe mode with network, review logs for clues, the monitor went black and unresponsive.

  Currently, when you try to turn it on, the blue led lights, fans work, the drive blinks ~ 3times in less than 5 seconds (then no more), the blue network light is on, the DVD will blink and cycle maybe (a little more than normal).  The screen remains black and does not start the BIOS or anything else, nor the second monitor (VGA, another HDMI is).  The keyboard does not and caps lock/num lock light does not enter the LED in the mice came out.  The system has no "beep" as usual when starting

  I think I have two issues here: first is a problem with something Patch Tuesday and the second a hardware problem.

  Forums offer anything by a tired CMOS battery, to a failure of the CPU, low-power, the defective boot drive.

  In these circumstances, someone at - it suggestions?  I'm pretty technical but not a guru of any measure.

  I changed the CMOS battery and start the system.  Right now, in safe mode with network through newspapers and analyses.  My geek don't think that friends at work is a battery, since the system quit while on.  Apparently, this system can become inop when the battery is too low, even if it's on.

• Apple Watch Calorie change tracking after the update

  This weekend I upgraded my watch v2.2.2 Watch OS and my phone to the iOS v9.3.3.

  Before this update, I would generally work everyday for about 2.5 hours (treadmill walk). I use my watch used to be in unison with the treadmill C1800. Both would record almost identical values for markets (in the tens of thousand) miles and calories (usually less than 50).

  Since the update my active calories for the same training sessions decreased by about 25-30% on the watch. I followed the instructions to recalibrate the watch, but nothing has changed.

  For example, today I walked for an hour in the morning at the speed and incline typical. The treadmills showed that I burned for 862 calories. The watch showed that I burned TOTAL 669 calories (calories active were about 100 less). Miles are still almost identical as what is shown on the treadmill.

  My number of calories used to be pretty close to 100 burned by 1000 measures. Today I am currently at 27 412 stages, 14.8 miles and 1883 calories active (at 16:30). My last full day of activities recorded before the update was 24 445 steps, 13,47 miles and calories 2 488. I went from 9.82 steps/calorie 14.55 steps/calorie. I have hundreds of workouts in before the update that clearly illustrate this difference. I don't understand how this is possible without a bug or calculation change.

  Has anyone run into this problem and found a solution?

  Hello

  The following steps may help:

  • Estimates of active calories depends, in part, your personal information. To verify that this is correct - and update over time:
    • On your iPhone, in the application of the watch, go to: My Watch tab > health > edit - tap and adjust the settings, then press on in fact.
  • To optimize the performance of the frequency heart rate sensor (data where is also used when estimating calories), make sure you wear your watch fits on top of your wrist and the back of your watch is clean. Apple suggests that you consider your clamping Strip before workouts and it loosen again later:
    • Port Apple Watch - Apple Support
    • Cleaning and port Apple Watch - Apple Support
  • When to recalibrate your watch, do not forget to exercise outdoors for at least 20 minutes at each of the speeds at which you usually walk or race (detailed instructions are provided in the article below). If you have not done so previously, you can reset your calibration data and start the process:
    • Calibrate your Apple Watch for better accuracy of training and activity - Apple Support