Continues to go for multi channels problem

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• PXI 2720: Conection for Multi channels

  Hello

  I put implement the multiple channels with resistance adjustment at the same time.

  It is good to use '2720 Soft Panel', but I couldn't find the way to set up on my own Labview program using 272 X reference live

  For example, I want to implement chan0 (80 ohm), (120ohm) chan1, chan3 (100ohm) etc.

  I tried on one channel at a time. This is to give the new unstable resistance...

  Is it possible to using X 272 screw reference?

  Should I use "palett Ni272x-> advanced-> ni272x relay control multipe" fuction for their implementation?

  Thank you

  Insuk

  Hello Insuk,

  The NOR-272 x Resistance.vi for example is a good example of how define a single channel - to set multiple channels, call the 1Chan resistance ni272x 1Samp.vi to write for each channel you want to adjust.

  Make sure you that you connect also each channel to the connector had TO plug into the front panel when you need to use it.

  Here is an excerpt that should define a multiple channel resistance and connect these strings to the façade had TO connector:

  

  Note: you can set the resistance without connecting to the connector HAD / DMM and then only connect to the connector HAD / DMM when necessary.  I noticed that the '272 x Soft Front Panel' does not display the resistance of the channel if its not connected to a connector - the code snippet above to display the correct resistance in 272 x Soft Front Panel, but will also each channel link to the front panel.  Make sure what you want to do this before starting the extract.

  Make sure that you aren't opening and closing of the session each time you call the resistance VI write, this could cause you reset the unit each time, which would be left to zero all the other channels.

  momo2013 wrote:

  I tried on one channel at a time. This is to give the new unstable resistance...

  I don't understand what you mean by «Who does give the new unstable resistance...» "If the code snippet above does not work, can you clarify on what is happening.

  -Marshall G

  National Instruments

• Multi channel problem

  I am a new user of Labview and have some problems. The main question that seems to be involved, is that when I put several input channels (dev1/ai17, dev1/ai18...) to record in an excel file, the number of samples per channel changes according to put them only one channel of input. If I don't have that one selected channel program records temperatures all 0.5seconds if I put more than 1 program collects samples every ~ 10ms. trying to get several input channels to take 1 sample of each channel each specified frequency (ranging from all s.5 to 2 sec). I do relize that this code can be nice to look at, but someone could suggest a few ways to conquer the problem?

  User of LabVIEW 8.

  For the acquisition of a single sample of several channels in some cases, the code below should be close to what you need. The rest of your needs I'm not sure that I understand and I'm not familiar with the screw Express you use.

• Need help to configure PP CS5.5 for multi-channel audio playback, using the M-Audio 1010LT card

  I've been hitting my head against the wall, trying to use my output channels of M-audio 1010lt card multichannel sound audio of sequence reading in first Pro CS 5.5.   It works very well in hearing CS 5.5, but not pp!  Probably I'm missing something simple in the installation program.  I configured the master audio 5.1.  Selected Delta M-Audio, ASIO in Preferences Audio Hardware, the value corresponding to the Audio output as shown here:

  

  Here is a picture of the display of sequences showing the Dolby Digital channels and 5.1 audio channels in audio levels masters appear on the right side:

  

  When I use the similar audio settings in hearing CS 5.5 the same Dolby Digital audio track plays back through my output 1010LT channels perfectly.

  What Miss me in the configuration of Premiere Pro!

  Found my problem!  It was my use of a Blackmagic capture format as I was using a BM Decklink HD Extreme card.  When I specified HDV 1080i for a pre-selection everthing worked fine reading of the chronology of the audio tracks through the M-Audio 1010LT.

• Generation of weather in TDMS for measures of multi channels channel

  Hello world

  I have to write an application with five measures will at the same time... then it must be saved in TDMS each channel being its own channel of time just after she... IE sequence of the canal as below

  Channel group

  Measurement1

  (EDT) 1

  GCA2

  TIME2

  Measurement3

  Time3

  Measurement4

  Years.4

  Approvisionnement5

  Neuve5

  Each time channel should have "dt" for its number of measure...

  So far, I m succesfull in the measuring channel recording only all the... But I have no idea how design for each measurement time line...

  I tried to get the time I receive the data using functions as below

  GetSystemDate (month & day, &year);)
  GetSystemTime (& hours, minutes & seconds);
  sprintf (timeStr, ' %d/%d/%d % 02d: % 02d: % 02d ", day, month, year)
  hours, minutes, seconds);

  This will generate the channels of chain of time... but my requirement is of data type ' Date/Time' used on larger scale of the axis in tiara...

  Any help

  Thank you

  HS

  HS,

  There are two ways to store calendar for a channel information in a PDM file.

  You can only use the first method if timing information is regular (spaced), which means that it can be described with the only values t0 and dt.  This method translates a single channel in tiara which contains data values and stores the calendar as properties on the channel information.  Note that in this case DIAdem will treat time as relative values with no basis of absolute time values. The properties you must set on the channel are:

  (1) wf_start_offset (mandatory), the type is TDMS_Double, contains the time value t0 of the first data point of some units that you use and can just be 0 if your t0 value has no meaning other than as a reference for all other values of time in this channel point

  (2) wf_increment (required), type is TDMS_Double, contains the dt in whatever units you use

  (3) wf_samples (mandatory), the type is TDMS_Int32, contains the number of samples in the waveform

  (4) wf_xname (Optional), type is TDMS_String, contains the name associated with the x-axis of time and will be used by the tiara to label the x-axis in tracing this waveform

  (5) wf_xunit_string (optional), type is TDMS_String, contains a string that describes the x-axis of time units and will be used by the tiara to label the x-axis when tracing of this waveform

  You can set the properties above using the TDMS_SetChannelProperty function.

  You can use the second method for regular or irregular (not also spaced) timing information.  This method translates a channel with your data values and a separate second channel which contains the absolute timestamp values. From your original post, more like what you want.  In addition to your data channel, you must create a channel of timestamp.  Call TDMS_AddChannel with a data type of TDMS_Timestamp to create your channel of timestamp.  Call TDMS_AppendDataValues with the values of type CVIAbsoluteTime to write the Timestamp values in this channel.  You can create individual type timestamp values CVIAbsoluteTime by calling the functions of absolute time in the ICB Utility Library, such as GetCurrentCVIAbsoluteTime and CVIAbsoluteTimeFromLocalCalendar.

  I hope this helps.

  -Jeff

  NEITHER

• Multi-channel acquisition - simultaneous Acquisition of sampling 1 & 2-channel single sample in a task

  I am able to get a multichannel simultaneous sampling on my acquisition of data (USB-6363) without problem. But what I want to do is make multi-channel acquisition in a single task where sampling requirements are different for each channel. For example, I want I want to acquire a total of 1000 samples on 3 channels in a single task with DAQmx as follows the characteristics of sample:

  • AI0: Analog Wfm 1Chan NSamp (998 samples)
  • AI1 + ai2: 1 d analog NChan DBL 1Samp (1 + 1 sample/channel)

  I know I could do just a regular multiple sampling multi-channel acquisition through all three channels then average down from channels 1 + 2, but I don't have that several samples to spare. AI0 is a bandwidth hog in my application and consumes all the samples of data acquisition (2. MECH / s), but I can save a few samples to make analog measurements further (for example, temperature, pressure).

  Ai0 takes place also permanently so additional analog measures on ai1 + ai2 need to be included in the same task.

  I don't know how to go on this matter or if it is still possible. Any ideas or thoughts would be greatly appreciated.

  Currently I use a second DAQ to read these additional channels at a lower rate but I need to pass a single data acquisition.

  How should continuous ai0 really be?  You of course can enjoy on ai0, and one of the other entries at the same time, then there would be some gap in your data.  In addition, if you want to go to the full 2 MHz, you may sample ai1 ai2 twice in order to allow entry to set (the maximum specified multi-channel rate is only 1 MHz due to compaction of the constraints on the MUX I believe).

  DAQmx sort of you lets set something up like that, if you "cheat" it by configuring each sample as a single channel in your task (see an example similar here).  If your 998 + 1 + 1 (or 996 + 2 + 2) becomes a task of channel 1000 (takes a bit more memory, but should still be feasible).

  I would consider a 2nd DAQ card a better option if ai0 really needs to be continuous.  You can go with a (9174 or 9178) cDAQ chassis a 9223 (only 1 MHz if) for quick entry and your choice of module for the slower entries.  On the cDAQ chassis a module can run a separate task of AI from other modules (up to 3 tasks HAVE by chassis) at different speeds.

  Best regards

• Question: BDP-S570 or BX57 internet multi-channel flow?

  Hi all, I noticed recently that when I listen to the audio or video content on the network as my BDP-S570 diffuse now as a multichannel surround sound instead of the 2 stereo channels.
  I don't know if this is caused by the latest firmware I installed or changed content providers (or the Sony Server site) in a recent past a few days to send their audio in 5.1 multichannel, now. Or finally if my BDP-S570 went buggy and it's stuck in the PCM multi-channel streaming mode.
  It broadcasts my network all music and video internet connections in multichannel sound, even if I put the BDP-S570 "Downmix" mode setting of stereo 2 channels. I swear before I made this latest firmware update, I always had that 2-channel stereo audio from the internet network connections.
  So I need to know and ask if someone else becomes sound mode of 5.1 channels of their Internet stream?

  Update: too bad people, I found my answer. The cause of constantly multichannel PCM streaming of all my network connections was because I had the BDP-S570 DTS parameter defined on ' Neo: 6 Music ' instead of 'Off' in the settings menu. I set this to "off" and all the music from the internet is now back to regular 2-channel flows. for info. case solved.

  I'm glad that you managed to fix the problem yourself. If you have additional questions, please let us know and we will be happy to help you.

• Cannot create the multi channels Tx two USRP-2943Rs Session with driver

  I have problems of implementation of several USRP-2943R devices in tranmist both of their channels at once.  Right now my configuration is a configuration of four chains composed of two devices of RIO.  I am only able to transmit at the same time successfully CH0 and CH1.  I'm creating a session using two devices and my aim is to perform Tx on CH0 via CH3.  In addition, my goal is to use the LabVIEW driver without any synchronization, because I test fix synchronization through post-processing and you want the VI be as simple as possible without the hassle of FPGA programming. I realize has the Simple models OR - USRP Streaming Sync in LabVIEW, but additional synchronization and FPGA programming is too much for such a simple project like mine which would require no synchronization USRP.

  My VI and some screenshots of the error messages resulting is attached.  I am able to succesfully implement multi-channel Rx deals and attached is my multichannel Rx VI.  My question is why I can open and operate a session of Rx mult-channel without problem, while a multi-channel Tx session will give me errors?

  My final goal is to merge my multichannel work Rx VI with a mult-channel Tx VI work for measurements in order to test some synchronization post-processing routines that are performed in Matlab.

  I think that I found a solution to my problem.  I thought to post it here to help others.  It is important to use some sort of device to synchronize several USRPs.  However. I found that you must reset the device by setting the node of reset function blocks that open and session Rx or Tx.  "" If it is not defined, then the ' niUSRP Signal.vi configurethe ID of the specified attribute is not valid for the scope specified (or channel)." error occurs, any circuits that you define.  After the node Reset true and place an empty string for my channels Enabled, all was fine.  Also, a full duplex system you will be only to first log of Rx with a reset of the device, followed by the opening of a session of Tx without a reset of the device.

  One more thing, it is that there seems to be a bug if you feed a Tx process a table whose number of lines does not match the number of channels Tx.  This will result in weird errors funny will disappear only after doing a hard reset of the units.  So, just something to take note of.

  I hope this information will help others and this message can be marked as resolved.

• Cannot get DTS/multi channel audio via HDMI

  Hello
  I'm trying to connect my VAIO SVT15112CXS to my Bravia HDTV via HDMI to get multi-channel audio (DTS/DD) from my Bravia HT (connected to the TV via optical) with no luck at all.

  I have the same setup for PS3 works well, is it cable or equipment.

  I have already updated all the drivers.

  When the TV is not connected I don't get an Audio HDMI option in the playback devices (I checked to show disconnected devices / disabled) and when it is connected I do not get an option to change the configuration of stereo speaker.

  This way I get only Stereo sound.

  I tried passthough HDMI via ffdshow config (installed K-Lite codec pack) and there is no sound in this way.

  Is there a solution? something escapes me?

  Thanks to all in advance,

  Thanks for your time and your response.

  I got it actually work! updated drivers audio and video (not Sony ones sugested, but later of Intel and Realtek) and now I have everything works as it should.

  The only minor problem is that Vaio Care now wants me to go back to the previous version of the driver, but I'll just ignore it.

  Everyone, try this if you experience this problem.

• Synchronization of four cameras with gaps in the timeline for multi cameras sequence

  I use Premiere Pro Trial CC to edit a multi camera concert. (The trial is just to see if the multi-came thing will work better than CS5) Since there is a limit of 30 minutes on four of my SLR, I have gaps in each of my deadlines of four cameras. All of these tracks were synchronized manually upward with a master audio track.

  In order to create a multi-cam sequence, I need to synchronize the video tracks 1-4, but so far have not been able to do. I tried to clips from each camera of nesting (so video 1-4 are all separate nested clips.)   I turn on the targeting of track for four channels of video and an audio track. Then I press 'I' to select a Point for the selected tracks. Not sure if this is how it works - just guess here.

  I then tries to 'Create Source Multi camera sequences' and tracks synchronization to aid 'In Points' on the nested five (4 video and 1 audio).   When I double click on the sequence of Source Multi camera to preview, I get four video windows appear, but the timing isn't right. It's as if they all were associated with at the beginning of the clip, not the markers that I put in front.

  So that's my problem. I can't synchronize these titles before creating a sequence of Source Multi cameras. I tried the synchronization of audio track, but it fails - too gaps to make it work, I think. I have no timecode. The only way I can think to do is to clip markers. Are some of these features disabled in the trial version?   Thanks for any help on this!

  MacBook Pro

  10.10.5

  Intel Core i7 2.8 GHz

  16 GB 1600 MHz DDR3

  NVIDIA GeForce GT 750M 2048 MB

  All of these tracks were synchronized manually upward with a master audio track.

  Then, with all your video tracks manually synchronize would with your audio master, you are ready. It would be a sequence with audio and 4 video layers. Now that nest, activate multi-cameras and turn on the multiple camera monitor in the program monitor and start your editing.

  --------------------------

  and if you want to try the other route-

  as for the creation of sequence of Source Multi cameras with points, place your points on your clips 4 source using the source monitor, you will only be able to get one on your audio files. That you establish for the created Premiere Pro sequence camera multiple source.

• How can I get multi channel audio via the HDMI port on an early 2015 MacBook Pro?

  I try to get the 7.1 audio channels to flow from my MacBook Pro to a cinema set up. The display works fine now I plug the HDMI in however the sound still Mac speakers. I checked the settings and no HDMI output is available. An airtime option is available, but that returns only two channels as a maximum to the receiver. When I go to the configuration of the source on the receiver it receives video at 1080 p 60herts however it is specifically stated No Audio from the Source.

  Also, I have connected my iPhone 6 s more using an Apple through the same HDMI cable adapter and it works perfectly. We also use HDMI with our PS4 occasionally and it works perfectly, even with the 3D.

  Thus, the MacBook Pro is early 2015 with an i5, the receiver is a Harmon Kardon AVR 2700 (we run 7.1 channels of this) and we are connecting via the HDMI port through a 50 ft HDMI before. The receiver sends the audio to a projector with 1080 p 60 hertz if it changes anything...

  Also if it helps the receiver supports dts - hd master audio decoding, Dolby True HD/Digital Plus decoding, HDMI 1.4 (HDMI is compatible 2.0), as well as multi-channel input and PCM and linear PCM.

  I use a "Behringer UCA202' audio device I bought on amazon.com for only $29.

  It works very well for the audio 5.1 or 7.2. Works connect optical toslink. Just plug it into a usb port on your Mac and a cable optical toslink to your AV receiver.

  My Yahmaha 7.2 audio/video receiver is measuring process the digital signal in THX, DTS, Dolby digital Pro logic, a cinema, etc.

  

• Definition of various mitigating factors for each channel on the virtual bench MSO

  I'm trying to measure two very different signals, using both channels of the 8012 virtual bench programmed in LabView. The signals are very different amplitudes, which means that the definition of the vertical range for the largest signal is not truncated causes the smallest signal to become very agitated that the resolution today is very low. The only way I know to use two channels simultaneously is to index the waveforms with channel number when the measurement is complete. This means that both channels of parameters are defined at the same time by the same command sequence. Is it possible to set separate settings for each channel during intialize?

  I enclose my referral program that there is much more than just this part. If someone need clarifications just ask!

  Thanks in advance!

  Kai

  I thought about it. If anyone runs into this problem let me know and I can show you how I did it

• AI trigger and measure multi channels

  Hi all

  I have a simple problem (using USB-6259).

  can repeat the measurement trigger of AI and measure multi channels, but not both at the same time.

  -DAQmxCreateAIVoltageChan(hd, "DEV1/ai0",...)                    define the ai0 as the trigger channel

  -DAQmxCfgSampClkTiming

  -DAQmxCfgAnlgEdgeRefTrig

  -DAQmxStartTask

  -DAQmxReadAnalogF64 (hd, "DEV / ai0:3 ', / / I want to measure more channels"ai0:3"not just"ai0")

  Thank you

  Hassan

  Hi Hassan,.

  If you use an analog trigger with several analog channels, you will need to use the APFI0 input as source of relaxation. See this KB: Why do I get error-200264 when running analog reference trigger? All you need to do is to connect your analog signal online 0 to APFI0 (Paperback 20 in your case) and set the source of relaxation at APFI0.

  The reason is that you don't have that an NOC on Board (series E or M) and she's going to have to switch between the different lines (see this KB: modes of sampling). This parameter collides with the idea of a trigger analog reference on a specific line (constant sampling of data in a ring buffer up to what a condition is met). The APFI0 line, however, has its own CDA. Therefore, it can run simultaneously.

  However, please note that the ADC is fast but has lower resolution to HAVE it sampling ADC. See these KBs: series E and M series Analog Input Trigger resolution, be aware of a possible error between the analog trigger threshold and the value of the first sample

  Hope this clarified the issue.

  Best regards

  Peter

• Simultaneous multi-channel Imaging NI PCI-1422 or 1424?

  We have an IMAQ 1408. We want to make simultaneous multi-channel imagery. However, 1408 has only 1 A/D converter, it cannot acquire multiple channels simultaneously. We are looking for possible upgrade.

  The NI PCI-1422 or 1424 seem to upgrade products of 1408. Can someone tell us if they can do simultaneous multi-channel Imaging?

  Sorry if this isn't the right forum for me to post this question. But I called the customer service OR. The guy doesn't really know acquisition cards. I think that there are more experts here.

  If you have analog signals, it is a little more difficult.  NEITHER ensures more hardware to read signals from analog cameras.  I don't remember all of their equipment, be capable of more of an analog input signal simultaneously.  They always alternate between the signals, a reading at the same time frame.

  Your best bet would be to get an analogue to digital converter which converts the formats I've mentioned.  You must make sure it is compatible (uncompressed, industry standard, etc.).

  Bruce

• Imaging multi channels using the acquisition card OR

  We have a 1408 IMAQ being controlled by LabVIEW 8.0.

  We want to install multi-channel of imagery. All the channels work individually. However, when I was trying to show two channels simultaneously, single channel works and I got the following error message:

  Error 1074397150 has occurred to IMAQ enter Setup.vi

  Possible reasons:

  NOR-IMAQ: A timeout error occurred while you wait for the specified event. If you expect a picture, make sure all the video data is acquired during the period. If you wait for a signal, check that the assertion of signal occurs within the period.

  Sometimes I get a different error message asking me to assign different buffers to both channels. I understand that IMAQ 1408 has only analog digital (ADC) converter to digitize the incoming video. It may acquire up to four different cameras, but only of a camera at a time.

  I don't mind do frame rate in half. I think to show only one channel at a time and do the two channels alternantly. But I need to know how config routes to get there.

  I've attached an example that should work.  I could not test it because I don't have the equipment, so it might need some settings.  I would test it with one channel by setting the channel # 1.  Once it works, define channels # 2.  I set the display to use snapshot mode so the same image can be used for all screens.

  The only reason that I can think of that would make multi-channel acquisition fail when single channel works is the lack of synchronization between signals.  The start of frame signal must be the same for all channels.

  Bruce