Two-channel?

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• Generating signals simultaneously on two channels (SMU-5451)

  Hello!

  I'm trying to generate 2 different signals on the two output port of my SMU-5451.

  Signals transmitted from data read from the file of PDM.

  I'm able to generate 1 1 channel signal. But I can't ' figure out how to complete the data for my 2 channels memory and let generator simultaneously press these data or their respective!

  Can any help? Maybe an example?

  Thank you!

  Hello Mr. Gambini,.

  You can find all the information to do this here:

  http://zone.NI.com/reference/en-XX/help/370524P-01/siggenhelp/5451_ni_5450_multichannel_allocation/

  Particularly:

  "To write waveform data to two channels at once, you must first striping of the data. "Once the data are interleaved, call the VI niFgen write Waveform (poly) or one of the wave functions write niFgen with the channel parameter set to"0.1"

  Kind regards

• measure with the two channels of the virtual bench simultaneously in labview, error 375903

  Hi, I am trying two measurements simultaneously using two channels of analog input of the virtual bench. I chose the channel MSO 1 and 2 for the measures but I get error 375903 returned evewry time say the requested resource is reserved. I'm not under any other software which should use the virtual bench. The error occurs when I'm initializing the session, even before a measurement was made. Can someone tell me how to call each channel so that I don't get this conflict of resource reservation?

  I have included the VI and a screenshot of the error.

  Thank you!

  NGKai wrote:

  Hi, I am trying two measurements simultaneously using two channels of analog input of the virtual bench. I chose the channel MSO 1 and 2 for the measures but I get error 375903 returned evewry time say the requested resource is reserved. I'm not under any other software which should use the virtual bench. The error occurs when I'm initializing the session, even before a measurement was made. Can someone tell me how to call each channel so that I don't get this conflict of resource reservation?

  ASM takes only supported a session unique instrument and your VI uses two. To use both channels, delete the second session MSO and specify channels in the MSO configure Analog Channel.vi

  Here's an example that uses two channels brought:

  VirtualBench: Bode Analyzer with the FGEN and MSO

  http://www.NI.com/example/52076/en/

• How to createt two channels in AFG3102

  I am trying to create two channels on AFG3102 but we manage only create one channel at a time.

  can you explain how?

  Hey kamils,.

  I tried your VI with material real (I have a Tek AFG 3252) and it does not resemble the generation was already enabled for the first string. So, when I ran your code it has been implemented both slots but it turned only on channel 2. I added a function to configure output on the end of the VI for channel 1. I tested the code changed with my 3252 and exits the scope and it seems to work fine. The two waveforms are identical you currently give the same data at the same time, but this can easily be changed to fit your application. Take a look at the attached VI and let me know if you have any other questions.

  Lars L

• How to control two channels of simultaneous functions AFG 3200 B generator?

  The AFD 3200 B function generator has two channels. I want to use both channels generations some vague simultaneous sin. I downloaded the labview driver: Tektronix AFG 3000 Series.

  I did three things:

  (1) try to connect to two channels in VI.

  However, all the screws of example do not support the connection of the name of two channels simultaneously.

  (2) run only two signals generating VI with another name for channel at the same time.

  However, a single channel runs after the other.

  Do you have any suggestions?

  Thank you!

  Wu Yue

  Hey Wu,.

  You need two sine waves to be completely synchronized (aka having the same exact phase)?

  If they must be synchronized, then the AFG should on the two output channels at the same time, but you will probably need to configure serial in your program.

  If they do not need to be synchronized, then is there a reason why you would not be able to simply divided between the output signal two BNC? If this isn't an option, then you will probably need to make some kind of trigger to get both channels to start at the same time.

  Lars L

• Using two channels of both HAVE ANSI C

  Someone at - it an example in ANSI C to 2 different transducers at the same time data collection? The examples I've seen are for one HAVE only. I need to collect data in the form of two distinct components. AI0 data should not be discarded with AI1 data. Start with two distinct tasks? If so, is there an example?

  I solved the problem by using NISpy and change the settings to see what effect they have had on the program. I was trying to read two channels with data of each 1000 points. I thought that my buffer size was the problem, but he was in the call to:
  DAQmxErrChk (DAQmxReadAnalogF64 (taskHandle, 1000, 10.0, DAQmx_Val_GroupByChannel, data, 2000, & read, NULL));

  I did not realize the importance of the arraySizeInSamps of setting and left it to 1000 when I added the additional channel.

• Create a channel by combining smaller values of the other two channels

  Hello, I have two channels (v + and Volts1 +) and I am trying to create another channel (Volts_Small) that will have smaller values of the two channels. I need to compare each data point in the two channels and add little value to the new channel.

  THS is what I tried without success:

  I have Sun
  
  Dim: Set Group = Data.Root.ChannelGroups ("200_68")
  
  Dim Chn1: Set Chn1 = Group.Channels ("v +")
  
  Dim Chn2: Set Chn2 = Group.Channels ("Volts1 +")
  
  Dim Chn3: Set Chn3 = Group.Channels ("Volts_Small")
  
  For i = 1 to Chn1.Size
  
    If (Chn1.Values (i) > Chn2.Values (i)) then
  
      Chn3.values (i) = Chn2.Values (i)
  
    On the other
  
      Chn3.values (i) = Chn1.Values (i)
  
    End If
  
  Next

  I would give much help appreciate with this! Thank you.

  Cedric

  EDIT:

  Nevermind, I solved this problem:

  I have Sun
  
  Dim: Set Group = Data.Root.ChannelGroups ("200_68")
  
  Dim Chn1: Set Chn1 = Group.Channels ("v +")
  
  Dim Chn2: Set Chn2 = Group.Channels ("Volts1 +")
  
  Dim Chn3: Set Chn3 = Group.Channels ("Volts_Small")
  
  For i = 1 to 900000
  
    If (Chn1.Values (i) > Chn2.Values (i)) then
  
      Chn3.values (i) = Chn2.Values (i)
  
    On the other
  
      Chn3.values (i) = Chn1.Values (i)
  
    End If
  
  Next

  Hi Cedric,

  I strongly advise to use the calculator channel and the MinV() function that is already integrated to tiara.  You have less code that runs much faster, especially for the largest data sets.

  Dim: Set Group = Data.Root.ChannelGroups ("200_68")
  
  Dim Chn1: Set Chn1 = Group.Channels ("v +")
  
  Dim Chn2: Set Chn2 = Group.Channels ("Volts1 +")
  
  Dim Chn3: Set Chn3 = Group.Channels ("Volts_Small")
  
  Var Variables: Variables = Array ("Ch1", "Ch2", "Ch3")
  
  Dim channels: channels = Array (Chn1, Chn2, Chn3)
  
  Call to calculate ("Ch3 = MinV (Ch1, Ch2)", Variables, channels)

  Brad Turpin

  Tiara Product Support Engineer

  National Instruments

• Try to use the same pattern for more than two channels (CSR configuration) with usb 6000

  Hello

  I am currently trying to implement a LabView code to get readings of voltage using 5 different places at the same time. I want to only use the first location in the ground and get 4 measurements of voltage between the ground and each of the other 4 channels. I use a USB 6000 which, for now, allows me to use the same pattern for only two channels. Is it possible to use the same pattern for 4 channels?

  Thank you

  Maria

  The images do not explain everything. You must explain what are the sensors. I think you totally wrong on how they should be linked. CSR, all sensors must be a common understanding and the outputs not individual channels as I have already explained. If you are unable to do this, you should probably not use CSR and you have the wrong data acquisition device. If you want a side of a sensor as a reference, you need differential connections.

• Outbreak of similar PCI-6251 reference edge does not work with two channels?

  I use this card PCI-6251 to acquire data from two channles of entry. I need to use reference similar edge trigger. the trigger for the chan signal 1 and acquire data from chan 1 and 2 chan. However, the error is that this card can't take two channels with similar trigger edge reference. Please check if it's the PCI-6251 limilation. If so, can you suggest any other card can do this work? The normal extent can trigger from one channel and acquire data from many other channels.

  Thank you

  Liming

  
  

• How to find the time between two channels of entry in the data acquisition card or pci 6036

  Hello

  I read a lot-related posts on the simultaneous measurement of two input voltage of similar channels in map data acquisition. I know that the best material is "simultaneous measurments of the Series DAQ cards" but I only pci data acquisition card 6036 and I try to understand what is the time between the reading of the two channels . This period is always constant? (must it rely on a voltage (amplitude, frequency, waveform..). I send the sine wave (s) to the two channels and read the values of V, if they read the same value, the difference should always be zero but I get-0,002 to 0.002 Volt difference (I must find a way to convert it in time). A screenshot of my VI is attached. I wonder how I can accurately measure the time delay between the channel.

  I am open to any suggestion, my final goal to read exactly two channels at the same time ((ou connaître le délai exact donc je peux correspondre les données correspondantes étant donné le temps de retard))

  Hi spinup,

  better you should post your question in the forum of LabVIEW, LabWindows/CVI is used

  Good luck.

• Cannot acquire two channels?

  I'm missing something... I can't acquire mutiple channels. It will work if I delete one of the channels.

  glskinner wrote:

  If I delete the other creation of channel and create another 'read' inside my time, loop that connects to my first creation of channel... How to stipulate that this new channel number 'read' is?

  Not quite.

  Create the task with two channels and then your read reads and returns the data from these two strings in an array of waveforms.  Just hint about the desired waveform.  (Or their separate plots on a graph chart)

• How can USB-6210 I synchronize two channels of ctr

  Hello

  I use LV 8.5.1 and NI USB-6210. A small application I want to generate two different impulses with synchronization but simple starting point. When I configure a task with two channels the second channel configured always starts a ms later. But, if I configure both channels in terms of frequency, they start synchronously.

  My idea is bad in general? The DAQmx part is fixed.

  Thanks in advance

  Hi there, too.

  the release of the finite pulse trains, to two meters for each task. Therefore, your application will be the first impulse using two output counters and then to exit the second impulse using the two counters.

  Like the USB-6210 don't not have outputs DIO correlated, you'll generate two infinite pulse trains (which can be started at the same time throug a trigger of arms) that you explicitly stop before the start of the second pulse (using the DAQmx abort task from a parallel loop), or upgrade your hardware at least a USB-622 x card series and a digital output model... Alternatively, you can use the PCI-6602 counter card and use a counter to Gate two others doing an infinite impulse train uses a relaxing break...

  Synchronization of two meter in NOR-DAQmx tasks
  http://digital.NI.com/public.nsf/allkb/BB7AE2D12BB04CBE862574FA005D3826?OpenDocument

  Using a counter to generate a redeclenchables Train digital pulses with a PCI-6602 and DAQmx
  http://digital.NI.com/public.nsf/allkb/4A9AF19480E50C6D862571B70058142A?OpenDocument

  Several counters on the same card with a single trigger pulse
  http://digital.NI.com/public.nsf/WebSearch/CE99A0B2A9048A2A86256C630062F550?OpenDocument

  Best regards
  Sebastian

• Find the time to intersampling between two channels AI USB 6251

  Hello

  I want to know how late it is between two-channel sampling of HAVE in a USB-6251 (term mass) used in conjunction with a block of connection SCB - 68 (Labview 8.5, Windows XP).  I realize that there's only an ADC and simultaneous acquisition is not available.  The specs are listed as follows:

  Sampling frequency:

  Maximum: 1.25 MECH. / s single channel;  1,00 multi-channel MECH. / s (aggregate)

  Minimum configuration: no minimum

  Timing accuracy: 50 ppm of sampling frequency

  Temporal resolution: 50 ns

  We know of a way to understand this point other than by experimentation?

  See this

• Mode two-channel for HP - Pavilion HPE - h8-1234

  Hello world.

  (Online) has just bought a HP - Pavilion HPE - h8-1234 that comes with 10G of RAM.

  A saleswoman said it has 4 DIMM slots and one is open, so I think it has 2 x 4 and 1 x 2 G DIMMS.

  I would add 6-8 Gig RAM more, but want to ensure that it is running in Dual channel mode after I do the upgrade.

  Can I add a 8 G DIMMS in the open location, or I have to install 2 x 4 G DIMM and remove G 1 x 2 DIMM?

  Or maybe I should consider adding modules DIMM 2 x 8 G and remove the G 1 x 2 DIMM.

  I do a lot of Photoshop work, and my old computer would go with 4 GB of RAM.

  Thank you

  Please you start reading this very useful article titled 'everything you need to know about double and Triple, Quad Channel Memory Architecture"the link provided on page 5 of the article... This is where the nuts and bolts to install properly the memory is explained. Page 6 is a continuation of the two-channel section.  Basically, he says, on most of the Intel and the latest AMD motherboards... Place the matching pairs of memory in dealing with the same color (XMM1 and XMM3, XMM2 and XMM4 on these systems). On older AMD motherboards... Place the matching pairs of memory in dealing with the same color (XMM1 and XMM2 and XMM3 XMM4 on these systems). There are some rare exceptions to this rule.

  So, on your system, it should be a matching pair in 1 & 3 and 2 & 4 another pair... If you buy a pair of DIMMs to 4 GB, install them in 1/3 or 2/4 and place the pair of original 4 GB DIMMs in the remaining slots (make sure that the original DIMMS are a pair).  If you buy a pair of DIMMs of 8 GB, install them in 1/3 and place the pair of original 4 GB DIMMs in the remaining slots (make sure that the original DIMMS are a pair).

  Note: If the pair 4 GB of origin is not a game, the system will work in single channel mode. If you mix an original 4 GB and a new 4 GB, the system will run in single channel mode.

• How to complete the two channels of a stereo track in a mono track?

  I have recorded on the L channel a stereo recording with the interviewer and the interviewee has recorded on the channel of a. I applied the two fill 'right' and 'left fill' to the runway, then cut and switch between the two, when appropriate. However, when they are all two talk, I'd like that the two channels to be active, but not as a stereo track (because otherwise the sound is actually mono) and turning on the two "fill right" and "fill left" at the same time seems to feed each channel at 50% instead of 100%, at least that's what I guess since there is a significant drop in level.

  Any suggestions? I'm on CS6.

  OK, here is the solution I've worked.

  I created a new track to mono submix at the bottom of all my songs. In the Audio Mixer Panel, I remapped my stereo audio track to go to the mono submix track before going to the master. This forces all the audio out as that mono the end, which is exactly what I was looking for.

  For what it's worth, one track stereo padding right or double left audio and is stronger then the railway normal stereo, even if she plays two audio channels, they don't add to the intensity of the double mono. I just applied a + 4dB gain stereo sections to compensate for this.

• Need help to set up an acquisition of two channels using NI5154

  Hello experts NOR:

  I'm setting up a scanner high speed data acquisition NI5154. I have two data channels need to be measured. In fact only the waveforms in the channel 1 must be recorded and channel 0 is used for counting digital pulses.

  My goal is like this: once started, the digitizer should count the digital pulses in channel 0 for some time until a start trigger happened in the channel PFI_0. After receipt of the beginning in the channel PFI_0 relaxation the digitizer should switch to channel 1 and start captured signals and save them to the disc.  After a well-defined time, stop digitier the acquisition in channel 1 and then switch to channel 0 and repeat as cycles.

  my questions are: what the best way to count the Digital pulse channel 0 ? The only way I know is the source of reference on channel 0 command and then get the number of "Done Records" from the property node.  After the acquisition of the digitizer will be waiting for the trigger to start in the channel PFI_0, no pulse in the channel 0 will be counted. If I let the impulses in channel 0 not counted in the first cycle, at the end of each cycle how can I switch from channel 1 channel 0 and saitch return after receiving the trigger from the beginning? It seems that I have to configure the trigger repeatly system.