PXI-4071 sampling too slow when using a hardware trigger

We use 3 PXI - 4071 s in parallel to measure with accuracy of high voltages. The program is written using LabVIEW 8.5.1.

An additional test condition has been added which requires the use of a quadrature decoder and the synchronous DMM.

We thought it would be simple, using backplane trigger 0.

However, something odd happens.

With a low-cut VI that uses a single DMM, we get 100 microseconds time to sample running with internal triggers. However, if the overall relaxation or trigger of the sample is set to TTL0, the sample time becomes so 5.1 milliseconds. It seems very strange that even just definition of overall relaxation, expected to affect only the time of the first sample, not the time between samples, has that effect. The plug for the DMM also said, that the maximum trigger rate is of 6 kHz.

We have confirmed this reported sample time is independent of the speed of the clock actually connected to TTL0. If the clock is faster, it gets the reported sample time. If it's slower, the samples occur on the edges of the clock.

Does anyone know if there is a parameter that has a default that changes based on the source of command and can be changed to work around this problem, you?

I found the solution to this.

Over time the value-1, the DMM uses a short value (less than 100 US) to set hour when, in modes triggered internally. However, he used much longer (about 5 ms) when the value - 1 and with the help of a hardware trigger.

If the running-in is set to 1e-5, i.e. 10 microseconds, "the estimate" returned for conversion period goes from 5.1 ms 100, we and conversions actually occur at a rate set when clocked with trig 0-5 kHz

Tags: NI Products

Similar Questions

  • Internet connection is too slow when downloading store

    Original title: stor errory that the internet connection is too slow

    I get an error message indicating that the inernet connection is too slow when I try to buy anything at the store. everything works when I'm connected. the store is the only app that gives me this message

    Hi Reg,

    Thanks for choosing Microsoft Community Forums.

    You are facing problems of downloading in Windows store as the process is very slow. I will definitely help you.

    I suggest you follow the instructions in the methods below to fix Apps.

    Method 1: Follow the steps to clear the cache to store:

    1. Press Win + R keyboard
    2. Type of WSRESET. EXE and press ok
    3. Restart the computer

    Method 2: Run the troubleshooter Windows 8 App.

    This utility automatically solves some issues that may prevent your running applications, including the suboptimal screen resolution and security or incorrect account settings:

    http://download.Microsoft.com/download/F/2/4/F24D0C03-4181-4E5B-A23B-5C3A6B5974E3/apps.diagcab

    Method 3:

    What to do if you have problems with a soft

    http://Windows.Microsoft.com/en-GB/Windows-8/what-troubleshoot-problems-app

    Let us know if you have other questions about Windows in the future. We will be happy to help you. We at Microsoft, strive for excellence and provide our customers with the best support

  • Why firefox 6 get too slow when navigating through about 15 sites open with coffee in the morning (add-on) not in firefox 5.0.1

    When I open about 15 sites in firefox 6.0 and 6.0.1 with Morning coffee add-on version 1.35 there not too slow to browse all the it takes about 30 min or more some time never load sites
    but when I do in firefox 5, 5.0.1, or 3. XX is the browsing speed is good and take about 2-3 minutes to completely cover each of them.
    I think that there is a problem with several tab navigation in firefox 6 or maybe a security that allows to slow to browse many sites.
    Help, please

    Firefox 8 solve this problem. !

  • PXI-2510 has no reaction when using NI VeriStand

    Hi all

    I want to use a PXI-2510 in NI VeriStand and I read a document named NI VeriStand module - fault Insertion units OR to: http://zone.ni.com/devzone/cda/epd/p/id/6248

    After deployment, I change my state of the controls in the workspace, but PXI-2510 has no reaction.
     
    Here are my steps:

    1. download the file - 2510_add_on_nivs2011.zip

    2. copy the files in the folder named Custom Device llbs in \National Instruments\VeriStand peripheral 20xx\Custom

    copy files into the folder named models display in \National Instruments\VeriStand models 20xx\Display

    3. open NI VeriStand and use the PXI-2510 as a custom device.

    4 deploy and open the workspace. the default fault chains station is cross with channels of dut. but when I change its station in an open State, PXI-2510 has no reaction.

    Please help me with the problem.

    Best wishes.

    If you use the console Viewer (Tools-> display console), you see error messages published on the screen?

  • large format HP 7110 prints come out too dark when using the choice of photo paper.

    My officejet 7000 would be to print borderless photos size beautiful poster even using a brand off paper. (Staples brand)

    But my new 7110 printer prints much too dark.  I choose the option "other photo paper.

    Hi @Ratboy2k Sunshyn here for help.

    I see that you're having trouble with your 7110 newly purchased. If your photos appear darker when you used the 7000 all programs? Have you tried to change the settings for print quality? You may need to change the quality at the standard. With the help of high quality may cause more ink on the page, your impressions would therefore appear darker.

    It could also be the selection of paper. Even if you are off mark paper, you don't have to choose "other photo paper. What are the options available in the selection of paper and what kind of paper do you use? I understand it of paper Staples, but must have a particular type as advanced, or premium and so on.

    I would like to do everything I can to help. Please post back with the requested details and I'll gladly come back and work with you to find a solution. Thank you.

  • Apache 2.2 - 12 c WebLogic proxy behavior extremely slow when using SSL

    We find that extremely slow behavior (loading time of 1 + minute) when you try to access a Server WebLogic 12 c behind an Apache 2.2 web server.  We use the latest version of the WebLogic Apache plugin, which is designed for Apache 2.2.  It is under the 1.7.0_21 of Java on a virtual Linux of RHEL6 machine.  If I disable SSL and point the WebLogic plugin to the no - SSL WebLogic port, the page renders in less than 1 second.

    Note: Another machine with the same configuration (almost?) does not exhibit this behavior.  I'll call it the 'work' VM.

    I compared the httpd.conf, httpd-dist and WebLogic console configuration tabs between the two environments, and everything seems to fit.  The only major difference between these two environments is on the 'work' VM we're running WebLogic as a standard user; and Apache on the machine with a strange behavior, WebLogic runs as root.  We have not noticed any problems with such a configuration in the past.

    The delay between the request for page and page rendering is a little over 1 minute.  I turned on SSL debugging extended and looked through the newspaper, and I see the same delay when requesting.  An excerpt from my weblogic - server.log follows.  I don't know if the exception I see below is normal or not; I checked, and I see the same exception on our 'VM work' so I guess that this is probably not the culprit.

    My httpd.conf contains:

    < IfModule mod_weblogic.c >

    WebLogicHost my_host

    WebLogicPort 7004

    Proxysecurise WE

    ConnectTimeoutSecs 20

    WLSSLWallet/appl/apache/certs/my_host-oracle-wallet

    DebugConfigInfo WE

    WLProxySSL WE

    < / IfModule >

    Thanks in advance - any help would be greatly appreciated!

    Here's the log of WebLogic.  The Apache log displays any errors.

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361752 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: try to get the certificates of the SSLSession, SSLPeerUnverifiedException peer: peer not authenticated." >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: negotiatedCipherSuite: SSL_RSA_WITH_3DES_EDE_CBC_SHA >.

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: SSLEngine.getNeedClientAuth (): false >.

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: peer certificate chain: null >.

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: weblogic.security.utils.SSLTrustValidator.isPeerCertsRequired (): false >.

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < validationCallback: validateErr = 0 >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361753 > < BEA-000000 > < peer certificates are not necessary and are not provided by peer >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361754 > < BEA-000000 > < user weblogic specified validation trustmanager status 0 >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361754 > < BEA-000000 > < SSLTrustValidator returns: 0 >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361754 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] [[: 'weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: no failure of the trust, validateErr = 0. >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361754 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: successful post-handshake processing.» >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361755 > < BEA-000000 > < [thread [ExecuteThread: '2' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: called SSLEngine.unwrap (ByteBuffer, ByteBuffer []): result = Status = BUFFER_UNDERFLOW HandshakeStatus = NOT_HANDSHAKING '.

    bytesConsumed is 0 bytesProduced = 0. >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '3' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361756 > < BEA-000000 > < [thread [ExecuteThread: '3' for the queue: 'weblogic.socket.Muxer', 5, Thread group to queue]] : "[weblogic.socket.Muxer']] weblogic.security.SSL.jsseadapter: SSLENGINE: called SSLEngine.unwrap (ByteBuffer, ByteBuffer []): result = Status = OK HandshakeStatus = NOT_HANDSHAKING.

    bytesConsumed is 2029 bytesProduced = 2000. >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '3' for the queue: 'weblogic.socket.Muxer' > < < WLS Kernel > > <><>< 1376085361756 > < BEA-000000 > < certificates of treatment of Exception: peer not authenticated

    javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated

    at sun.security.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:397)

    at weblogic.servlet.provider.WlsSecurityProvider.getSSLAttributes(WlsSecurityProvider.java:203)

    at weblogic.servlet.internal.VirtualConnection.initSSLAttributes(VirtualConnection.java:163)

    at weblogic.servlet.internal.VirtualConnection.init(VirtualConnection.java:74)

    at weblogic.servlet.internal.VirtualConnection.initSSLAttributes(VirtualConnection.java:163)

    at weblogic.servlet.internal.VirtualConnection.init(VirtualConnection.java:74)

    at weblogic.servlet.internal.ServletRequestImpl.initFromRequestParser(ServletRequestImpl.java:300)

    at weblogic.servlet.internal.HttpConnectionHandler.dispatch(HttpConnectionHandler.java:558)

    at weblogic.servlet.internal.MuxableSocketHTTP.dispatch(MuxableSocketHTTP.java:115)

    at weblogic.socket.JSSEFilterImpl.dispatch(JSSEFilterImpl.java:213)

    at weblogic.socket.MuxableSocketDiscriminator.dispatch(MuxableSocketDiscriminator.java:185)

    at weblogic.socket.JSSEFilterImpl.dispatch(JSSEFilterImpl.java:213)

    at weblogic.socket.SocketMuxer.readReadySocketOnce(SocketMuxer.java:965)

    at weblogic.socket.SocketMuxer.readReadySocket(SocketMuxer.java:897)

    at weblogic.socket.PosixSocketMuxer.processSockets(PosixSocketMuxer.java:130)

    at weblogic.socket.SocketReaderRequest.run(SocketReaderRequest.java:29)

    at weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:42)

    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:147)

    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:119)

    >

    # < 9 August 2013 4:56:01 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < ExecuteThread: '99' for queue: 'weblogic.kernel.Default' > < < WLS Kernel > > <><>< 1376085361758 > < BEA-000000 > < [thread [ExecuteThread: '99' for queue: 'weblogic.kernel.Default', 5, Thread group to queue: 'weblogic.kernel.Default']] weblogic.security.SSL.jsseadapter : SSLENGINE: SSLEngine.wrap (ByteBuffer ByteBuffer) called: result = Status = OK HandshakeStatus = NOT_HANDSHAKING

    bytesConsumed is 130 bytesProduced = 157. >

    (Note that more than one minute on here with no other journal entries!)

    # < 9 August 2013 4:57:06 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < DynamicJSSEListenThread [DefaultSecure] > < < WLS Kernel > > <><>< 1376085426938 > < BEA-000000 > < [Thread [DynamicJSSEListenThread [DefaultSecure], 9, WebLogicServer]] weblogic.security.SSL.jsseadapter: SSLENGINE: SSLEngine.setEnabledCipherSuites (String []): value = TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 ,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA ,TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_DSS_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,TLS_ECDHE_RSA_WITH_RC4_128_SHA,SSL_RSA_WITH_RC4_128_SHA,TLS_ECDH_ECDSA_WITH_RC4_128_SHA,TLS_ECDH_RSA_WITH_RC4_128_SHA ,TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,SSL_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA,SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA,SSL_RSA_WITH_RC4_128_MD5 TLS_EMPTY_RENEGOTIATION_INFO_SCSV. >

    # < 9 August 2013 4:57:06 PM CDT > < Debug > < SecuritySSL > < my_host > < CASWEBAdminServer > < DynamicJSSEListenThread [DefaultSecure] > < < WLS Kernel > > <><>< 1376085426939 > < BEA-000000 > < [Thread [DynamicJSSEListenThread [DefaultSecure], 9, WebLogicServer]] weblogic.security.SSL.jsseadapter: SSLENGINE: SSLEngine.setEnabledProtocols (String []): value = SSLv3, TLSv1, SSLv2Hello, TLSv1.1, TLSv1.2. >

    Thank you

    -sam

    Note that the ' javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated ", could indicate the Java has problems with the validation of the certificate.

    VeriSign must be present in the Virtual Machine cacerts keystore Java. What you can do is download the certificate using openssl, for example.

    ECHO | OpenSSL s_client-connect ${HOST}: ${PORT} 2 > & 1 | SED - don't ' / BEGIN-CERTIFICATE - /, / END CERTIFICATE-/ p'

    and then manually import it into the cacerts file, for example (extracts of Middleware: secure the WebLogic Server)

    keytool-import - alias some_alias-file some_certificate.pem - keystore ${JRE_HOME} / lib/security/cacerts

    The slow response may occur, in the sense that Java uses a random generator to slow (OS). Also in the ${JRE_HOME} / lib/security/directory there is a file called java.security. In this file the following line is present

    SecureRandom.Source=file:/dev/urandom

    On a Linux system, this must change for

    SecureRandom.Source=file:/dev/./urandom

    Now, it will recognize as a file and start actually using it, instead of falling back into the slow random file.

  • Multiple page printing slow when using narrow pages (LaserJet)

    Hello everyone,

    I am running a printing service and using the printer HP Laserjet Printer 1606dn (I used also other models, such as the Laserjet 1006, Laserjet 1300 and other models).

    I have a problem with the speed when printing on pages that are narrow as A4 (need to my client that I print on the pages of 26.9 x 18.8 cm). I need to print a large number of pages a day, and during the test with the same paper in A4, it prints very fast. But when printing on the page size to custom, the printer get a single page, impression on her (very fast), but then he wait about 15 seconds to get the next page.

    It seems that there are sensors that detect the page is close that that of the A4, and if the printer do not get quick pages.

    I test a lot of software options (like saying that the printer paper is 'standard size' (as Executive), impression in RAW format, and so on), but I ralized it's a problem of size of paper width.

    Can you help me please?

    Thank you

    Luis Cardozo

    Paraguay

    I found a solution. It has to do with the sensors.

    In the upper part of the printer, where the book comes out, there are 3 sensors, one on the left, one in the middle and one on the right. They are little pieces of plastic that opened or closed from the optical sensors (I think).

    When a page dies, it activates the sensors. When a page is close, active not one (or two) sensors on the sides.

    I tested this way: I put my narrow paper not centered, but on the right. The sensor on the left, I 'activated', by placing a small piece of paper under the sensor (it seems like a paper go there). And... it works!

    PRINT FAST!

    But as BLLuten said, it might overheat the fuser unit.

    So, my question now... is what would happen in case of overheating of the fuser unit? (or, in the printers HP, Fuser will get overheated?)

    I think I'll work with this little hack, but with a fire extinguisher to next to me, as a precaution.

  • The Dreamweaver CC incredibly slow when using subversion!

    Wow! I just install Subversion (visualsvn.com) on a dedicated server on my network.

    When I turn it on for my sites in DW, it seems to work.

    But when I switch from one site to another (using the dropdown under files), he hangs for 5 minutes and told me that DW does not. If I wait, he ended up rocking on the other site, and I'm on my way.

    It is a real pain as I bounce around a site for updates, etc..

    Does anyone have a solution for this?

    Subversion is really cool.  It is riddled with problems, which could explain why DW is falling quickly.  See this related discussion, 2 weeks ago.

    Dreamweaver - plu Dungeon drop automatically

    Nancy O.

  • InDesign 5.5 slowness when using master pages... Help, please

    We use master pages in InDesign.  Our records have anywhere between 100-200 master pages.  We have NEVER had problems working speed in InDesign before (IE just disabling layers takes 3-4 seconds each, etc.).  I noticed when I deleted everything but a few master pages, the performance is as it should be.  Why in 5.5 is a problem now with us?  Yet once again, the way we used InDesign before, was never a problem until now and it makes it almost impossible to work with... Thoughts?  Suggestions?

    pwhite2315:

    I don't usually do this, but you piqued my interest. I filed Bug #3125326, "10 x Head tilting visibility of layer downturn with several master pages" in your name. I would say that the chances of getting a fix for this problem in CS6 (much less before it) are low at the moment, so set your expectations correctly. I have not explored to see if there is no work around

    Notes from Adobe that the bulk of the time is devoted to generate previews of document page, by Preferences > file management > saving InDesign files: always save Images from the overview of the Documents, and disabling of these previews is a viable solution. Obviously this isn't a solution, but assuming that your workflow is compatible with this, it should help.

    (You could also the script only to that preference at the time of a file record...)

  • Mail too slow to use text entry!

    It's not constant, but sometimes I can not reply to an email because if I press a key for the letter he take a second to make it appear. If I check activity monitor nothing is presented as a problem, so I don't know what the problem is. I use OS 10.10.5 on my iMac.

    Any ideas?

    Run & view the results of etrecheck.  Maybe someone will spot something.

    https://www.etresoft.com/etrecheck

  • Problem of reliability data acquisition PXI-4071

    Hello

    I'm having a problem of reliability using my 4071 Pxi digitizer mode.

    I have a number of tests that use the SMU-6363 (usually configured for DC) analog output to provide a stimulus for our own device, which has a number of a/d converters.  We use the PXI system for calibration and testing.

    1. I select a voltage ranging from tensions.

    2. program the PXI-6363 to drive this tension

    3 TIME about 10ms to settle.  Note there no discrete capacitors or resistors in the circuit.  Everything is parasitic and would generally be under the nF mark and less than 10 ohms

    3. configure and Initiate() acquisition of data with the PXI-4071.  In general, I use a sample rate of 1000 s/s and get about 30 samples (worth 30 ms).  Activation is immediate and I used the default a queue time, 0, set the time and it doesn't seem to make a difference.

    4. measure the voltage with the CDA.  For debugging purposes I have sometimes made twice once before calling Initiate() and once after.  The after is normal.  The time required to measure the ADC is shorter than the acquisition time, but regardless of stimulation by the SMU-6363 is constant

    5. extract the waveform.

    6. the average waveform and compare the value of ADC measured by applying tolerances etc.

    Here's the problem: it works well most of the time.  But only 0.1% of the time (1 on an acquisition of 1000), I get 8-12 samples that are close to 0.   It sounds like a problem of time settling (on the surface), but no matter the amount of wait time data, I always get this behavior.  Not only that, but the tension before the call to Initiate() in height CDA, it always confirms that the motor voltage is already set to the programmed value.  Nevertheless the acquisition presents near data 0.

    So far our independent ADC always reports the expected before and during acquisition (100%) voltage.   It's like the DMM input is disconnected during the acquisition during a period of time, because we have confirmed that the voltage is already present prior to the acquisition (component can).   I have no errors the insider or FetchWaveForm calls.  I still have all my samples.  And 99.9% of the time that everything works as expected.

    The DMM and ADC are connected to the same point and both are referenced to ground, and as I said before only the parasitic capacitance and resistance (cable).  We use a matrix of switching (PXI-2530 (b) to make these connections.  We almost always use 51/2 digits and 10V range for data acquisition.

    Hello

    I thought about it and was going to repost but am distracted.

    The device with the ADC also has a mux and switches the mux to an internal node.   It only switches when measuring and is open at other times.   There is a race condition where the acquisition starts too early and maintains the acquisition after that the switch is open.   Unfortunately I don't have the option to trigger.

    I forgot the internal mux that I had designed the test years ago and I did some updates to improve the stability of the test.    That's why we start the ADC measurement when acquiring.

    I just added a routine to reject samples below a threshold

  • 29,0 is too slow and continues to return when using of 28.0 Grrrrr!

    29,0 was too slow and too jerky. I returned to 28.0 and it was fine until 29 reinstalled on its own. I checked about: config and everything everywhere was assigned to prevent back but he did anyway. Sorry to his coarse, but what gives? I had deal with this as it has evolved. We should always be able to choose, right?

    Start Firefox in Safe Mode to check if one of the extensions (Firefox/tools > Modules > Extensions) or if hardware acceleration is the cause of the problem.

    • Put yourself in the DEFAULT theme: Firefox/tools > Modules > appearance
    • Do NOT click on the reset button on the startup window Mode safe

    It is possible that your security (firewall, antivirus) software blocks or limit Firefox or the process of plugin-container without you inform, possibly after the detection of changes (update) for the Firefox program.

    Delete all rules for Firefox and the plugin-container in the permissions list in the firewall and leave your firewall again ask permission get full and unrestricted, access to the internet for Firefox and the plugin-container and the update process.

    See:

  • Cannot rename my PXI-4071 for something else that "PXI-4071" have the self-assessment work, and I can use the new name in the ivi drivers

    I tried to change the name of the PXI-4071 "DMM" that worked, but when I try to launch the "self-test" or open the app it Panel always fails.   This is also true if I pass the new name of the ivi driver.   Return to the name "PXI-4071" makes everything works again.   Note I managed to change the name of our PXI-2530 b 'SWITCH' and the name of our SMU-6363 to "MIO" and I could pass these names to their IVI drivers and they would work.

    I messed with alias VISA, IVI logical names, but nothing works unless it is called "PXI-4071.


  • How to acquire data through several channels in parallel using E 6070 PXI, PXI-4071 and LabVIEW?

    Hello

    I use LabVIEW and NI PXI-4071 PXI NOR 6070E to measure the current through a variable resistance. Now, I use a single channel of SCB - 68, but I want to add another channel at the same time so that I can have two resistors instead of one that I cam measure current through them.

    I have attached a Pdf file showing installation of equipment to use and code LabVIEW also.

    Can someone look at these files and give me some guidelines or ideas that can help me solve this problem, please.

    Thanks in advance.

    Best regards

    Shaheen.

    Your 4071 can do a measure at a time. Your data acquisition cannot measure resistance is not she of the analog inputs.

    However, you could use a multiplexer and multiplexer your 4071 DMM. This habit give you simultaneous action, but can acquire data one after the other, the speed depends on the multiplexer, you choose!

    I hope this helps.

  • My slider controls when using Excel and Publisher became too sensitive

    My slider controls when using Excel and Publisher have become too sensitive and more often, don't do what it is that I'm willing to do.  For example: while in Publisher if I click on a photo, that I've inserted, and try to move it, it will automatically open the Format Picture option.  She does it with a number of other features as well.  If I'm in Excel and I'm trying to highlight a phrase, it will begin to highlight the requested sentence, then the middle of it will stop after the sense that I'm going with my cursor and it will pass at the end of the sentence.  I guess you could say this kind of "jump" and the mouse became too sensitive with the controls.  It's really frustrating and it feels like it has a mind of its own.  At first, I thought maybe a low battery mouse, because she was the way she does when the battery is dying.  Changed the battery and no change.  I also tried to set my mouse speed and still nothing.

    Any ideas?

    Oh and btw this just started to happen during the first 4 to 6 months.

    Hi H.Morton,

    1. the problem occurs with excel and publisher?
    2. what operating system do you use?
    3. did you uninstall and reinstall the mouse drivers?
    4. have you tried with another mouse and check?
    5. do the mouse has a selection of sensitivity on the mouse itself?

    I suggest you to update the mouse drivers and see if that helps.
    Updated a hardware driver that is not working properly
    http://Windows.Microsoft.com/en-us/Windows7/update-a-driver-for-hardware-that-isn ' t-work correctly

Maybe you are looking for