simulateneous of analog and digital triggering

Similar Questions

• analog and digital data synchronization

  Hi all

  I would like to help with what I seek to accomplish, if you don't mind much.

  I'm trying to synchronize the acquisition of analog and digital modes using a common trigger that launches both types of data collection at the same time. What I've done so far, is wasting his time trying different combinations to gather examples of LabVIEW 2011 on the synchronization of data - namely the 'Multi-multifunction-Synch AI lu Dig Chan.vi' and 'Multi-Device Synch-Analog Input-Finite Acq-Analog Start.vi.

  I tried to combine the two, because one contains digital and analog, the other contains the trigger for multiple tasks.

  I guess I should place the trigger (either digital or analog-eventually I will want to choose) then call the "Get Terminal name with device Prefix.vi. But from there I'm not sure wheter to connect the name of the terminal of the sample clock digital channel or a digital leading edge of the digital chain trigger.

  Also, the way it is wired now I get errors at the local terminal name, so I don't know exactly where this terminal must come from.

  I try my best, I could use a little help, I have attached my attempt with the examples that I speak to you.

  Thank you.

  Hi beefcake.

  The CtrInternalOutput internal output line is used as sample for your digital output sample clock source clock. If you change the settings for your CO Pulse Time is Dev1 and your digital output is Dev2, you will notice that the name of the product terminal would give Dev2/CtrInternalOutput. So what you get here, it's as well as the digital output device sees his sample clock, instead of the clock itself.

  If you just want to use a digital/analog input as your trigger, you should do something more as in the example above. Do you use multiple devices, or are all your lines on the same device? This example is more complicated because it is synchronization of signals on several devices.

  Looking at how this VI is wired, you can see that the digital signal triggers the analog signal. You want the analogue signal must be started first, so that when the digital signal triggers the analog task is already running and can trigger immediately. If the digital task started first, it can trigger until the similar task had started, and they do not exactly trigger at the same time.

  I hope that clarifies things. Kind regards

• How to trigger and outputs analog and digital Outout tasks begins on a counter to start?

  Hello

  I'm trying to synchronize the start of a task outputs analog, a task of digital output and a task of counter. I want to start the counter to serve the master trigger and analog and digital tasks to synchronize his departure.

  I guess I need something like:

  analogOutputTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger ("?", DigitalEdgeStartTriggerEdge.Rising);

  digitalOutputTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger ("?", DigitalEdgeStartTriggerEdge.Rising);

  analogOutputTask.Start (); Slave 1

  digitalOutputTask.Start (); slave 2

  () counterTask.Start; n / / master

  Where? is a string specifying a command source for the beginning of the task of the meter. However, I can't find what this string. Any suggestions?

  Thank you!

  -Jon

  Just FYI, the solution to this problem as well as some other ones is encapsulated in a short example .NET, I created. It is on the Web site of EITHER:

  http://decibel.NI.com/content/docs/doc-15500

  This project shows how to synchronize all your analogue/digital outputs through tasks and forums in terms of synchronizing Calendar and start clock.

  -Jon

• NEITHER USB-6343 analog and digital grounds

  In the manual for the NI USB-6343, it is said that the mass input/output, analog and digital terrestrial are related, but by a small sign. For my application, I am attaching all 3 these grounds to exit the box (I'm tie all areas with physical threads). It is perhaps a silly question, but it's OK to do, correct?

  This should be OK unless there are large currents flowing on ground conductors.  If you have important currents in the ground, you have other problems that must be resolved before you connect the DAQ hardware.

  Lynn

• Do not connect ANALOG and digital grounds when the annotation to the front at the UB

  I'm finding randomly more often when I annotate with impatience to UB analogous and digital patterns do not connect.  In addition some power to the IC pin connections are unable to be connected in UB.

  Connect to the digital terrestrial analog ground is checked in my properties of Ms.

  Is there a reason for this?

  Thank you.

  Tien Pham offers this solution that worked:

  I saw the ground issue in the file you sent and you can fix it by replacing
  the digital ground with the one from V12.  On the Spreadsheet View, click
  on the "Components" tab, select all the Dgnd symbols, next click the
  replace icon on the Spreadsheet to replace all symbols at the same time.
  

• Producer consumer with inputs and outputs analog and digital

  Hello world

  I'm working on a program of control system for some practical test work. Currently, I am working on the data acquisition of the Labview program component. My architecture is consumer-product loops with a what. My system will have analog inputs, outputs, analog inputs and digital outputs. It is not a criticism of time sytem, but I wish that all the acquisition of data to synchronize. I enclose my program because it is at the moment. I have difficulties to get all the data in the since that I have two types of data. In addition, I don't know if I have synced the four sequences of read/write correctly. I would be very happy if someone could take a look at my program and give me some advice. Thanks in advance.

  
  

• Synchronization of analog and digital output with the external sample clock

  Hello

  First of all sorry for my English, I will try to explain what I want to do.

  I want my PCIe-6321 to send two custom signals (modification sawtooths) on a mirror controller. I would also like to generate output with my card at the beginning of each tooth of saw. Everything must be synchronized with an external k-clock signal of 100 kHz. The idea is that whenever the PCI receives a trigger to external clock, it sends two analog output voltages and when he received 1024 clock ticks it will also send a pic of triggering TTL. What I do is first prepare the map and after that in a loop sending and modifing the output values of the two signals and at the same time send a digital signal Boolean in each arch, so when's done it 1024 iterations of the loop I send an event to the digital port. Attached you can see.

  The problem is that I don't know how to synchronize both. Can I use the sample clock just to the analog output? I can use sample for the two outputs clock, or do I need to use the output of the meter? If don't know how to use it here.

  If I do nothing else bad/wrong, I would be grateful for feedback.

  Thanks in advance,
  Pablo

  I don't know how but I find the solution. I'm generating more than a positive value (as I was triggered maybe very fast the oscilloscope has been absent there). If I put the sample clock of digital output to use the sampling/ao/Dev1 clock that it doesn't, but if I put to use the same source as the OD (terminal where my external clock is connected), but the trigger to start the DO to be Dev1/ao/StartTrigger this works. I don't really know why, but it does.

  Thank you for your patience and your help. I put here the final code.

• Fortunately the cRIO merger two time real screws: analog and digital output

  Howdy,

  I need help with a cRIO code.  The purpose of the code is to acquire an analog input from the NI 9234 c series module and be able to send a "signal of pulse" digital camera (first low for some time, t1, then high for some time, t2) from a NI9401.  Separately, I wrote the code to perform both tasks.  However, when I add the code of RT digital output pulse pulses to analog input RT code, the DMA FIFO overflows because of the way that my digital pulse output code works.  Currently, there are two reasons which overflows of the FIFO:

  1. The digital output code is pending for a while loop (pending "Send Pulse" become a true), the loop I can't empty the buffer FIFO
  2. The FIFO is not enough, quickly emptied depending on how long the pulse (t1 and t2) times are.  The way I keep the pin high or low for a defined period of time is by issuing a sleep command, which blocks the loop I empty the FIFO.  (Is there a "best" way to sleep?)

  I have attached photos of my codes FPGA and RT.  Please give me a suggestion on how to marry my two loops of RT for the use of happy resources!  Thank you.

  I found a quick way to solve this problem.  I moved the timing of the Digital pulse on the FPGA.  So whenever I have a Boolean value, the FPGA generates a waveform with the settings I put (a pulse in my case).  This works because the FPGA loops run in parallel, I think.  That's why, when I run a pending order in the loop of FPGA digital output, it does not prevent the FPGA of analog input loop to run.  I have attached a picture of the code.

• Analog acquisition and digital simultaneous DAQmx

  Hi all

  I use the USB-6212 acquisition card to acquire analog and digital inputs. However, I encountered some problems that I don't know how to solve.

  All channels (analog and digital input) is independent of one another, but should be acquired at the same time (using the same clock, I think), but I'm not managing to achieve; In addition, I can not put a task so that the digital acquisition is made by "continuous sample" - the error says it is not supported, but I saw this configuration in other examples in this forum.

  The only way to get a digital waveform must keep pooling the entry? And, therefore, also in common analog input? Is it not this costly approach from the point of view resources?

  Best regards

  The decrease of performance will be determined by the speed of your computer and your USB hub.

  I think that to get the hardware timing of digital I/o on a USB device, you're going to have to step up to a card in the X series as the 6341, but I'm not sure about this.  You can find this specification under the specifications of each product tab.  Looking for 'Material' under DIO > Timing.

• digital triggering of stop/start of analog data acquisition

  I want to use a signal from a digital line to start and stop analog data acquisition. The signal can change levels several times during a race of the VI so I have to start and stop several times data acquisition and store each session data in a different file.

  I tried to play with the following screw: digital triggering of break, DigitalStartandStopTrigger and ContAcq_DigTrig. None of them doesn't seem to work for my configuration. I also do continuous data acquisition so I can't use a reference. I use PCI 6259 DAQ.

  I used the "P0" pins rather than PFI pin on the grid BNC-2090. I know... stupid enough.

• generate a digital triggering out CH1 (low and high) for the USB-5133

  Hello

  I would like to generate a digital triggering on the USB 5133 CH1, is this possible?  I tried with the PFI 1 successfully but the output is only 3.5 v and I need to 5V, because this trigger signal goes to a box of pulse generates a signal, which is received by the CH0 on the USB-5133. This configuration works on the 5102 OR but because of the treatment, I am obliged to try a new device.

  Channel 0 and 1 are only entries then you will not be able to use them to generate a signal.  All of our products current digitizer that are recommended for new designs use 3.3V CMOS logic levels for PFI lines in output mode.  Your best bet to generate a digital triggering 5V would be to use an external buffer that can accept 3.3V CMOS levels as an input, but is under voltage of 5V.  Here are some that might work for you, but there are many others: http://www.onsemi.com/PowerSolutions/product.do?id=M74VHC1GT126DT1G adding a buffer in line with the trigger signal will add delay, so you will need to ensure that it is acceptable for your application.

  Hope this helps,

  -Matt

• analog audio output and digital optical

  I just bought a 500-214 with IDT High Def Audio CODEC Pavilion / DTS Sound +.

  Is it possible to get opitcal of audio output digital and analog (speakers/headphones) at the same time?  Stereo amp needs access both to the multizone/source function.  I can manually choose one or the other before the reading - it is clumsy that when audio of of active switching devices will turn off, but a passage to not always light up.  But I really need both active simultaneously for amp work properly.  I also found jack rear speaker to be more stubborn while headphones jack front of switch.

  Hi zombi1,

  Welcome to the HP Forums!

  I did some research on whether or not we can use the analog or digital audio output at the same time, and it is unfortunately not possible.

  Thanks for posting and happy Earth Day!

• Slope of digital triggering NI SCOPE

  I have a problem, try to use a digital triggering with a USB-5133 digitizer.  I use NO-scope (3.5) and C.  My software doesn't seem to be able to change the slope of the trigger (using niScope_ConfigureTriggerDigital()).  There is no problem if I use an analog trigger.

  The problem is not related to my code.  I see the same behavior with the NOR-SCOPE Soft Front Panel (version 2.9).  In this application, if I connect the trigger PFI 1 entry and select digital triggering, then the selection of the slope has no effect.   However, by selecting briefly "edge" trigger, change of slope in this mode and back to digital triggering, I find that the trigger is now working according to the slope in the edge, trigger mode.

  Although niScope_ConfigureTriggerEdge() seems to work o.k. (using an analog input) and is not niScope_ConfigureTriggerDigital(), the following sequence does not provide a work around:

  niScope_ConfigureTriggerEdge (...);

  niScope_ConfigureTriggerDigital (...);

  The entrance of IFP 1 seems OK, even though at the start I had been feeding it straight V CMOS 5 door.  Adding a separator line at the entrance to the tensions between 0 and 2.8 V had no effect on the behavior.

  Hello Bmetz,

  It is a known problem that has been fixed in version 3.5.1 OR-scope. You can download and install the update through the page drivers and updates here:http://joule.ni.com/nidu/cds/fn/p/sn/n23:3465.40/lang/en

  You will find a list of bug fixes in the readme, including the following:

  123308: Fixed problem
  with incompatible trigger when to change the edge of triggering on the NC
  USB-5132/5133.

  Hope this helps,

  Jennifer O.

  Product Support Engineer: scanners high speed

• Outbreak of the AO tasks with digital triggering

  I'm triggering an analog using a digital triggering (PFI0) task on a NOR-6343 (USB), but don't see the behavior desired of my VI (see screenshot).

  * When I shoot digital triggering (digitalTrigger = False), the AO signals appear planned (except that... they do not fire).

  * When I turn on the trigger (digitalTrigger = True), however, there is no signal on the channels of the AO.

  * I tried two different sources: PFI0 and the clock internal (set both rising edge). For the PFI0 channel, I connected a function with a wave generator square 5 v (the PFI0 had a slow rise... time "I think I could solve this problem by adding a small circuit of buffering). However, I expect it should work correctly using the internal clock as a trigger.

  What's wrong with my code / setup?

  A few follow-up questions:

  * This will trigger the installation program not start indicator AO once? Or the trigger will cause the task to start whenever the finished AO signal and the trigger goes high? (I wish that it behaves like the latter)
  * Just to check: the response rate of the AO task to the digital trigger should be of the order of 1 MHz?

  Hello kllurie,

  What do you use the trigger for? The way you have the task to put in place now, it will run continuously until you press the STOP button and ignore any input trigger. If you want to be able to have the task to complete and start over with a digital triggering, you make the task two finishes and Retriggerable. You can configure the task to be finished by replacing the constant continuous samples on the Timing.vi with finished samples and giving him a number of samples to be taken before stopping. Then you can do the task Retriggerable using the property trigger DAQmx node and choosing Start > more > Retriggerable sometime before the Start.vi.

  As to what it should be used as your relaxation, you'll want something with a fast rise time (so that it is detected as a numerical advantage) and is not as fast as the sample clock. If you use the sample as your trigger clock, there would be essentially no difference between your redeclenchables task and a continuous. It would end the collection of samples and then immediately redeclenchee.

  Let me know if that answers your questions!

• External monitor for X 61-analog or digital

  
  

  Hello and welcome to the forums!

  The output on the X 6 ban is analog, but most sold monitors come with analog or digital - input some with both, others with one or the other. Your purchase of the monitor should not be limited to the connector type for the simple reason that there are connectors available conversion easily and cheaply, if necessary, convert the analog signal to a digital connection. So, this is really you, offers you can get on an external monitor to make a purchase of such.

  Then, there is no worry about running two monitors on the X 61. Use Vista or XP, you will be able to flawless use monitor or both. You can make the selection in the display properties (of no operating system). No additional software required to do this.

  Hope that helps