Identification of analog/digital PWM

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• 6143 - PCI or PCI-6133: simultaneous reading of analog, digital, and counter

  Hello Board,

  I want to use a PCI-6143 or 6133 to acquire permanently synchronized values ports analog, digital, and counter on the same device.

  I use vb.net to build an application that reads the values of the device buffer and stores them in lists for later use.

  By reading some other threads I discovered, that all the S series devices are able to use a source of material for the release of the digital ports.

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  M.B.

  Hi M.B.

  6143 does not support Correlated DIO (i.e. clocked by the hardware), the 6133 (see-> digital I/o--> Timing). As a result, synchronized doing of entry works with the latter. Acquisition of meter in the buffer is available on both devices. The 6133 also authorizes analog and digital triggering.

  To synchronize these tasks, you need to export a clock signal (sample clock HAVE for example) and take to the DIOs and counters for an acquisition in the buffer. An example for synchronization of AI and DI is given once you install the DAQmx driver in the folder when you are using Windows XP. Maybe you can start with that and gradually add your features.

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• analog digital 2-loop 2

  LabVIEW 2013 SP 1

  Windows 7 Pro

  Acquisition of data OR PCIe-1433

  Print custom, attached to the acquisition of data

  Each individual signals disucssed has been tested and works.

  Hi all

  I have an application that makes a bunch of installation, when the user clicks on the go, running a main loop which does a number of things, save pictures, etc. and also periodically sets the digital output pins HI and LO.

  This must be synchronized with the image recovery and storage.

  It works well.

  I have to add 2 analog input signals, also synchronized with the Digital out and capture video.

  I simplified so only in the test application, I start the application, set up some preliminary stuff and when the user presses, run a main loop.

  For now, I deleted the video component and components of data files.

  The application of test fires a single digial outside (for example puff left) and start listening on a single Analog In (e.g., left mic).

  When the left microphone reaches a threshold, it flags and stop listening.

  When the time is up, exit (left puff), digital has LO.

  If the threshold has not been reached when the digital timer is in place, he stops to listen then too.

  It works fine (the first time).

  However, the loop continues to run as it should.  When to prune them next time comes around the same thing is supposed to happen again (left or right), the digital signal not to is not triggered and analog in is not started.

  And this failure is true for all future iterations of the loop.

  I threw in a counter to show me the LabVIEW registering the case statement, and this is as it should.  But the signals are not generated.

  If I go on the diagram and turn on the 'bulb' followed; everything works.

  I get the digital output when I should, I get the analog.

  When I turn off monitoring, it does not work after the first iteration.

  I have attached the sample file.

  Any thoughts are appreciated,

  Jeff

  Hi DMJeff,

  If you turn on the running highlight and it works fine, then it does not work without it, this seems like a good hint that this has to do with the time.  I check the functionality of timing and possibly define some probes in there to get values.

• inputs and outputs analog digital usb 6009

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• Analog/digital VI

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  I use a digital converter analog VI. I see that VI, all parameters except the sampling frequency. An ADC must always come with like 10KSPS sample rate, 1mech. Can you tell me how to control the sampling frequency of the ADC. I have attached snapshot of my code.

  Thanks for the details.

• Sync USB analog-digital 6008 in ANSI C

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  Someone maybe all example of C/C++ code that address one or both of the above challenges?

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  A more sophisticated device.  the 6008 DIO cannot timed client software and is not supported and when to trigger or material.

• Analog & digital audio scrubbing

  Hello

  I'm about to be a new user of CS5 Production Premium.  New system certified on command (Z800).  I was a demo of CS5 and spent some time browsing this forum etc. and that you can't find the answer I wanted.  My question is:

  During audio demo rub has commitments and the audio has a digital output of the sound (audio choppy resulting).  I asked if it was possible to move the sound of rubbed analougue for a smooth rendition of the track of the timeline. The demonstrator was unaware if thiswas a feture in CS5.

  Suffice it to say, for me, this restriction would mean a difficult edition as I oftem need to synchronize the classical music with say instument subtle sounds from different sources of the same event.  Is it possible to scrubb analog audio and no digital output.

  I'm pass after a long decision liquid form (Avid) as MC does not fit the Bill for me.  So Adobe CS5 here I come back in a few weeks time.  Yes - a new learning curve and perhaps a few other questions here.

  In any case I hope that some of you wise owls will be able to let me know.  I am based here in Shakespeare Land - Stratford - upon - Avon UK.

  Thank you in advance.

  Gavin.

  But, soft! what light through browser there breaks? This is the answer, and JKL plays is the Sun.

  (Sorry... of the...)

  Gavin (and Craig),

  You can get what you want by holding down the key "K" (pause) and alternately pressing 'J' (reverse) or 'L' (forward) audio playback in a way slow, analog, reel to reel. Instead of samples of individual time of segment, you'll get a slower and less acute audio playback that is continuous, compared to 'step' usual reading you get when you navigate with the arrows. You can also get the analog style reading using the shuttle slider in the Source or monitor program (which is just under the transport controls). When the JKL play is limited to a speed you can get variable reading, both slower and faster, using the slider of the shuttle. The wheel behaves like the movement of "picture by picture" arrow key, so it won't work for what you are after.

  Hope that helps.

• DAQ 6528 Digital PWM output

  Hello

  currently I'm controlling an electric motor through its controller. This Controller has max signal 24V PWM as a speed controller. Unfortunately I PXI with the NI 6528 card, which has no counter outputs. I need 100 Hz. STI is possible to use this card to order this engine? If it is possible, how can I program it? I also have a card NI 6230, which has exits of meter, so there is only 5V output meter, I prefer to use 6528 card instead of going to electronics to build a circuit to 6230.

  Thank you in advance for your help!

  Martin

  Hello

  The example you are using has a while loop inside of it. So the VI does you will remain in the first loop ((deuxieme page of the Structure of sequence) as long as the Subvi is running (= until you stop it or there is an error). I propose to spend time on learning the basics of LabVIEW structures to better understand it. Here's a tutorial example, which may help you understand, how work loops: http://zone.ni.com/devzone/cda/tut/p/id/7588. This tutorial can also be useful: http://decibel.ni.com/content/docs/DOC-1694. There are also other tutorials - just search on ni.com.

• PWM & HAVE Synch

  Hello

  I searched the forums and support without result. What I've checked so far is: http://decibel.ni.com/content/docs/DOC-10785  http://forums.ni.com/t5/Multifunction-DAQ/How-to-Syncronize-Analog-Digital-PWM-Input-and-Analog-Digi... and the included LabVIEW examples.

  What I try to achieve is easier than reading a PWM signal and analog, sync signal using LabVIEW 8.2.

  I am in a position:

  -A PWM signal at approximately 1 050 Hz using two counters (the one used to measure the exact frequency and the other to measure the width of the high pulse)

  -Analogue signal between - 10 v and 10 v (from a load cell). I'll add another analog signal from the device even in the future, but it's not relevant.

  That's what I have so far:

  

  I am faced with mainly a problem with this:

  -Some of my width and frequency measurements are wrong. So bad as measures of extremely tiny width or very high frequency (up to 2500-3000 Hz) measures. I can avoid this by "filtering" the data... But I don't know I'm doing something wrong and I should be able to get the OK from the beginning data.

  I guess I'm wrong measures leave due to meter reading meter "at any time" some of the impulses to cut. I expect the meter to read continuously behind the best time available with my expected frequency / width and just throw the excess data. For example: at time 0 it returns the first value and in dt, it will return the value measured, throw data inbetween. So if my rate is 100 Hz and my PWM is faster ~ 1000 Hz, I have about 10 steps PWM to choose from for each measure of AI.

  Also, is there any other way to measure a PWM with a single meter (part of guess the frequency)? In the future, I need to read 2 PWM signals and their reading with a single meter will facilitate my work, I want to avoid having to synchronize the two planks.

  I would appreciate greatly any help on this, because I'm stuck.

  Thanks in advance,

  Xavi

  Sorry to answer me...

  Now I feel completely stupid. I was counting on the stability of the measured signal. I just checked my vi with a pulse train produced material DAQ on MAX and it works perfectly. This problem may be on the measured signal, unfortunately I have no way to check it out right now.

  Anyway, problem solved...

• I need help with analog to digital VI

  Hello

  I am trying to create a 13-bit virtual adc

  what I want to do is to use a simulated signal (e.g. sine, square, etc.).  the sample at a rate of 8 khz frequency and send each digital sample serial port.

  the thing is that I don't really know how to use the analog/digital VI, I know it converts an analog signal into a digital signal or a table, but I want to be able to use these digital data and not just watch it on a table

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  Copy the code shows the conversion of a sine wave of digital data with a resolution of 8 bits, and then to convert digital data into a byte array.  Send one byte at a time by the serial port.

  

• Duty cycle of measurement using digital inputs DAQ

  Hi all!

  My system has a PXI-8269 card and I want to measure the duty cycle of the Digital PWM signal generated by a device.

  To acquire this signal, I'll use a digital DAQ (PFIx) instead of a counter of data acquisition (CTRx) (they are already used for other applications).

  The search of the database of examples, I found live who use meters. So I wonder if it is possible to do that and how could I.

  Thank you!

  Sorry, the correct reference is PXI-6289.

  I was determined to acquire a digital waveform, converting it to an analog waveform and then using the correct function in the range of functions->-> Analog wave.

  Thank you!

• Digital TV does not detect the analogue channels

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  Hello

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