Number of averages for time waveform acquisition

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• waveform acquisition and an average of

  Hello!

  I need to acquire signals of samples N M and their average. Waveforms are started by external trigger, internal clock. Repetition rate is maximum 5 kHz. The wavelength must be close to the reverse of this (preferably in 95%, for example, 0.95 * 0.2 ms). No trigger must be lost. M is (preferably) of the order of thousands. N is (preferably) as temporal resolution allows. After receiving the data, any time can be spent on whatever the task. What will be the right strategy to deal with this problem?

  M - and E-series, C-interface for NIDAQmx DLL maps (I'll also undestand v8.2 example labview)

  Thank you!

  Boris

  Hi Boris,.

  If you have a 6289, there is no average capabilities of equipment, but performing the calculation of the average in the software is not a problem. If I understand your requests, all requests are achievable.

  You are limited by the number of channels for the number of playback channels on your 6289, but if it's ok, you're all set.

  External triggers and internal clock are quite feasible. Have you looked into the Finder of example of NOR? There are many examples which will do almost everything of what you specify. ; If you can work with LabVIEW 8.2 I open your finder example and discover two examples in particular. The first is called Acq & Clk of the NTI tension of Graph - Dig Start.vi. This can be found in the Finder example under the following folder path. Material input and output > DAQmx > Analog measures > tension. The second example though, I might help you is called Multi-multifunction-Ctr-Retrigg Pulse Train generation to HAVE sample Clock.vi. This example is located in the path of the material Input and Output > DAQmx > synchronization > multifunctional. This example uses a meter (which is triggered at the material time) as the sample for your task to acquire analog clock.

  Essentially, these examples can be translated directly into C programs, with the accompaniment of installation and definitions, etc. which are used in C. If you are curious about the C functions that relate to a DAQmx function, see Help reference DAQmx C, located in the start menu > programs > National Instruments > NOR-DAQ > Documentation. There are also examples of C who install if you install support for the CVI when you install DAQmx and they install the the following location: C:\Documents and Settings\All Users\Shared Documents\National Instruments\NI DAQ...

  Chris W

• Averages for number of loops

  Hi all

  I have a code (attached) in which a triangular wave is supposed to a magnetic field of ramp up and down to very low frequency (0.1 Hz or low). Reading (X) vs keithley reading field (Y) represented by two random numbers generators must be taken in synchronization with the triangular wave point by point. I would be very grateful if you could help to achieve the following objectives:

  1. by taking the average for a few cycles. Basically, I would define the number of loops in the outer circle to the loop and the number of sampling inside everything in a loop and then take the average between the loops.

  (Data for data of loop2 +... + loop1) + data to loop n/n

  2. the averages should be written to the text file and at the same time, I hope I always get the full date in the file action.

  Thank you

  Hadi

  Assuming that you want to monitor the data happens, I would like to initialize several arrays, both to keep the x and are data and to keep the number of each 'package '.

  Now, simply add the new data to the existing elements while incrementing the corresponding number. Dividing by the count will give you the way to be represented graphically. Here's a simple rewrite. The "collection must match the size of the field ramp, so it shouldn't be a separate control, I think. Currently, you graph the two random channels. You would you rather them the two graphic vs of the field instead? You want front and back scans averaged individually or must they go to the same average with a half data table?

  You save operation still seems a little convoluted. How do you actually data to be organized in the final file?

  Here is a quick project to help you get started.

• Connection of the PXI-4071 - can sound and LOs remain interconnected for the impedance of the cable 2, voltage DC/AC, frequency and waveform acquisition?

  Hello

  We use the DMM and SMU-6363 map to test a hardware device.  We will also use a PXI-2530 b switching matrix.  We will use the digital multimeter to perform the measurements of voltage, DC and AC, measurements of impedance (2-wire and 4-wire), frequency and waveform acquisition.  Can the PXI-4071 left be 4 wire connected (black jacks taken connected and red connected) mode and still be used to perform all other measures (including 2 impedance of the cable).  This would simplify the switch connections.

  Current measures use the son + and LO, but the HI and S-can remain connected.  The problem you are having is if you have an active device the digital multimeter and take you a 4-wire resistance and the measurement of voltage with all 4 wires connected and then change to a current... When you do this, short-circuit you the terminals of the DUT, on that you just take the measurement of the resistance.  If the terminal HAD, say, a power supply 10V, then you have just shorted out.  Of course, this isn't a problem if your Instrument is a passive device, or if you change just the unused two lead whenever there is an active device of low impedance.

  If you want to make voltage, current and 4-wire resistance, you need all 4 wires.  If you want to do the voltage and current, you will need 3 wires, but you could connect the s + Hi and then just do the two wires.  I vote running every 4 son to your DUT for maximum flexibility.

  2-wire resistance is a must if you are measuring resistance above 10 MOhm.  Alternatively, you can use 4-wire for all measures.

• Error 1074118650 on niDMM configures waveform Acquisition

  I modified the waveform of DMM demo, and it worked very well until I left work yesterday.  This morning, I get:

  "Error 1074118650 occurred at niDMM sets wave Acquisition.vi.

  Possible reasons:
  The specified file could not be opened. The operation could not be performed as indicated. »

  The demo of DMM unmodified waveform produces the same error.  Other screws I have who use configured Waveform Acquisition.vi niDMM work.  I tried to restart Labview.  I've added the main VI for a project and check that dependencies are where they should be.  Any suggestions to solve this problem would be appreciated.  Thank you.

  Hello

  I found documentation indicating that when this error occurs in what concerns a 407 x DMM, the problem could be that the F1 fuse connected to the 12V of the isolated side power has blown. You can verify that this is the case by using a DMM to hand to check the continuity across the fuse.

  As this seems to have been an isolated problem, I doubt that is the case. I don't know why this happens only once. Perhaps there was a power failure or other variables that ignore us. If however, it is a problem, you may call OR and ask to do an RMA number (Return Merchandise Authorization). I hope this helps!

• WAIT % - % IDLE, what is the average for a virtual machine?

  I did some research on performance of VM problems and worked with the media to see that there is maybe a bottle neck IO that occur with a virtual VMware machine I have performance problems on. The technician found that the WAITING % - % IDLE on average for this virtual machine is around 200%. The tech said it was abnormally high. I forgot to ask her what was normal but wanted to put a post to see if some people out there know what they are on average. What is an average number of see? I have the system done nothing right now and I see 579% waiting and 372% IDLE. The technology has been able to confirm that no IO queue was occurring in the VMkernel or on the HBA controller.

  Some average % positions would be useful. Thank you.

  gdewulf18480 wrote:

  Supposibly the amount of time in a State of waiting for I/O is the WAIT - IDLE % difference. I was wondering if anyone had the numbers for this feeling. Is there anyone with some of them?

  Q: How will I know the VCPU world waiting for I/O events?

  A: WAIT - % IDLE % can give you an estimate on how much time processor is spent waiting for I/O events. It is an estimate only, because the world wait perhaps for other than the i/o resources. Note that we should do it only for the worlds of the WWW, not the other kind of worlds. Because the VMM worlds represent the best guest behavior. For the disk i/o, another alternative is to read the disk latency stats that we explain in the drive section.

  WAIT % by itself cannot be used, you must develop and examine the individual vCPU % EXPECTATION values and subtract their idle time.  You can't do it on the initial view of a single line by VM CPU in esxtop.  If technology that you mentioned did not explain it, he doesn't know what it takes.

  I have lots of virtual machines that are never less than 300% when I wait - % idle and I have no problems.

  It is an example, I caught NimSoft server:

  DHSNMS1 100 100 5 192.63 193,80 0.24 0.03 291,44 1.04

  %EST USED (s) 192 - in other words, almost two processors are used 100%

  The %Idle is 1.04% WAIT 291.44 - according to the calculation of waiting idle, I have a super serious problems of e/s past  But this isn't the case, and expanding, I can see that.

  5665 vmware-vmx 100 1 0.09 0.11 100.00 0.00 0.00 0.01

  5667 100 vmassistant.566 1 0.62 0.65 99,63 0.00 0.00 0.00

  5703 100 mks:DHSNMS1 1 0.01 0.01-100.00 0.00 0.00 0.00

  5704 vcpu 100 - 0:DHSNMS1 1 32,35 32.88 67,28 0.28 0.11 67,14

  5705 vcpu 100 - 1:DHSNMS1 1 31,58 32.05 68.11 0.00 67.85 0.12

  So the changed values unfortunately because of ESXTOP bike when you develop... which is annoying, but anyway.  In this you see % waiting is 67 and 68 with another respectively being 3 to 100% (which is normal) and the idle being %, 0, 0, 0, 67 and 67.8.  Doing the calculation on the processors shows a wait - slowed virtually 0 - or very little IO wait past with processors.  But if you add up all the expectations of % and % is idling, you have 434ish, and the 134ish and do the calculation is the difference of 300 - which is the 3 who are always 100%.

  So there is no way we can answer your question, we can only help you to understand how the values should be interpreted.

  Waiting for i/o States almost always go on the disc anyway, it is unlikely, therefore, the network or the user entered, looking at the stats of disc ESXTOP is a much better way to determine if there is a problem of e/s.

• need manual for time capsule 1 TB

  need manual for time capsule 1 TB

  There are several different versions of the time Capsule 1 TB.

  To obtain the manual right for you, we need the model number of the time Capsule. It's at the bottom of the device, usually embedded in the base of carpet of MOSS. The model number starts with an 'A' follow-up of four digits.

  Can be... A1254... A1302... A1355.

• How can I change the phone number to use Face Time?

  How can I change the phone number to use Face Time?

  Your phone number come from your SIM, and when you open a session and activate FaceTime. It should appear automatically. If it is not, then I would say that your FaceTime does not complete the activation process. If you go to settings > FaceTime, you see something awaiting activation or waiting for activation under the switch to turn it on?

• configuration of IQ / number of samples for USRP2920

  Hello

  I tried to save the HF Signal using the USRP 2920. I had an unexpected behavior for certain configurations of IQ rate and number of samples.

  When you set the IQ for 1 M as an example and numbers of samples to 60984, the saved file long empty even after recording over a long period of time. It seems that there is an adequate number of sample for a given IQ there is.

  Do someone know the trade off between settings of bo?

  Thanks for your suggestions

  Hi Bolivar,

  With regard to the transmission continues in a loop, I think it could help you to make a small piece of transmission over until you actually begin the continuous transmission immediately in a loop. The reasoning being that small initial transmission could help boot to the top of the Tx buffer and prevent cost overruns due the USRP device waiting for data and do not get it.

  With regard to the relationship between the right size for a given frequency of IQ, I do not have a precise answer at this stage.

  Thanks and good luck.

• cDAQ for the continuous acquisition of data faster

  Hello

  I've only done very slow with LabVIEW data acquisition and I was wondering what the most fast (conservatively faster I'm not pushing the limits) data acquisition and recording of data possible on compact DAQ hardware? and the advantage of switching to a cRIO of a cDAQ really just for more reliable speed and data acquisition? I am interested on 30kS/s channels more analog input 5.

  Thank you very much!

  Rates are feasible, and you can stream to disk. It is only when you save in a text file that you need to start to worry about the use of a design of producer/consumer and a queue (in general).

  I'd be too concerned about real-time unless you do some kind of control loop where the reactions must be precisely timed (once again, in general).

  For very high acquisition rate (high MECH. / s), OR sell scanners that connect with USB in order to have some distance to go before you should start worrying.

• Pavilion 17-F001dx: 'Windows 8 using 100% of the HARD drives with high average response time and low write speed '.

  

  It turns out that it is a pretty known issue windows 8.1 users infestation since at least 2013 and there is not a simple fix, then it cannot be * completely * lack of hp. but I've had two of these laptops, both the same model, one needing to be returned and exchanged for a problem absolutely no report with (hardware failure: ethernet port does not work with lights taped). Both are renovated. Both have been extreemly slow and unresponsive even compared to the lower Brazos powered by the laptop that I had before, but I recently decided to investigate why.

  So if there is something specific HP going on here, I hope that there is a simple fix. My average response time went upward as well more than a minute (> 60, 000ms), so that I'm an aberrant case here against this problem of reactivity/band bandwidth hardrive typical windows 8.1.

  Edit: there is a case with another HP pavilion laptop (intel powered, so there may be a problem of storage driver intel described in the first link) being much worse.

  Did not want to resort to that, but,.
  Going to a new facility to clean up an image of Windows Pro 8.1 from DreamSpark for my school.

  Disappointed by the lack of response. Given the odd subdomain name (h30434), I'm wondering if this forum has been abandoned.

• Average read time IC Agent

  All,

  I use the IC agent seriously for the first time.  Just lie be of the opinion that all other settings other than the average playing time is not collected.

  Host > Hostname > physical disks > sda > average length of reading

  Other measures are collected very well. How the IC agent collects data so that I can begin to solve the problems.

  CentOS 6.2 x 64 with flgam last 5.6.7 and IC installed locally running as root.

  More physical measures of disc are from the file/proc/diskstats. Our IC dashboards visualize the logical disk data. The http://edocs.quest.com/foglight/567/doc/Cartridge/InfrastructureCartridge/Reference.003.4.php#424072 table gives a summary of what parameters are available for each type of OS. When I look at one of my test systems, I also see the values '0' for ' / '-I don't know if this is a defect, we can check it out. Other readers on the same host seem to bring their good values. If there are specific values that you expect or need I have to turn to our dev team to answer specific questions about what might happen or why some settings may not be available.

• How to calculate average daily time of the Start_Time and End_Time fields

  I am using ORACLE 11 G on Red Hat Linux, I have calculated the average daily time of multiple transactions for each day. The followign is the querry that shows the difference between the fields end_time start_ time and time.

  Select TRIP_LOAD_STARTED AS START_TIME, TRIP_LOAD_ENDED'RE END_TIME.

  ceil ((TRIP_LOAD_EDDT-TRIP_LOAD_STDT) * 1440) "time difference Bw Start and End.
  of GATE2GATE_ACTIVITY_VW
  Where TRIP_LOAD_STARTED > = February 1, 14 '
  AND TRIP_LOAD_ENDED < 3 February 14 '
  ORDER BY TRIP_LOAD_STARTED;

  The querry above gives me the result as follows:

  Start_Time End_Time time Diff bw begins and ends

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 18

  1 FEBRUARY 14 FEBRUARY 1, 14 12

  FEBRUARY 2, 14 2 FEBRUARY 14 29

  FEBRUARY 2, 14 2 FEBRUARY 14 29

  FEBRUARY 2, 14 2 FEBRUARY 14 29

  FEBRUARY 2, 14 2 FEBRUARY 14 29

  FEBRUARY 2 FEBRUARY 2, 14 14 19

  FEBRUARY 2 FEBRUARY 2, 14 14 19

  FEBRUARY 2 FEBRUARY 2, 14 14 19

  
  

  It shows two dates for which I want to get the average duration in minutes for each group to date by the start time.

  
  

  I use the following querry that probably gives me the average two days mentioned in where clause
  

  
  

  Select the floor (avg ((TRIP_LOAD_STARTED-TRIP_LOAD_ENDED) * 1440)) 'average of Minutes of time.

  of gate2gate_activity_vw

  Where TRIP_LOAD_STDT > = February 1, 14 '

  AND TRIP_LOAD_STDT < 3 February 14 ';

  Average duration in Minutes

  29

  Can someone help me to a daily average time calculated between start and end.

  Kind regards

  mhamidch

  Is that what you want:

  SELECT trunc (TRIP_LOAD_STARTED), trunc (TRIP_LOAD_ENDED).

  floor (avg (ceil ((TRIP_LOAD_ENDED-TRIP_LOAD_STARTED) * 1440))) Diff

  OF GATE2GATE_ACTIVITY_VW

  WHERE TRIP_LOAD_STARTED > = to_date('01/FEB/2014','dd/MON-YYYY')

  AND TRIP_LOAD_ENDED<>

  Trunc GROUP (TRIP_LOAD_STARTED), trunc (TRIP_LOAD_ENDED)

  Always the example of create table and insert statements to verify the results and use the to_date with date format function.

  Post edited by: Elya

• "Serial number is not for a product calling." Please try another. "

  I purchased, downloaded, installed and used successfully

  ADOBE ACROBAT PRO XI

  Version (11.0.07)

  installed 12.02.14

  purchased 12.02.14

  Adobe Acrobat Pro of XI (Windows, English)

  I tried in vain to register 6 + times

  I get the message:

  The SN is not recognized (error = statement "serial number is not for a product calling.") Please try another)

  I have a total of about 5 sessions which is about an hour trying to solve a problem, navigate your Web site, get into endless cycles and have noticed there is no way to call a phone number to solve a problem.

  What is the new paradigm of Adobe?

  It seems to be an administrative problem with Adobe

  What is the solution?

  Please notify

  The message means that you have a license to upgrade. You just need to prove that you qualify by entering the serial number of the license of Acrobat 9 or X you have - which is the product of "qualified". It does not ask to enter the license key Acrobat XI once again, you've already done that.

• How can I set the maximum number of reboots for my PDF files?

  I want to sent my PDF to a friend, but I just let see only twice.

  
  

  How can I set the maximum number of reboots for my PDF files?

  My software is Acrobat X

  You can't - a PDF security options do not allow control over the number of times the file can be opened, even using DRM.