convert volts frequency?

Similar Questions

• OR PXI-5600 buck converter of frequencies only

  Hello

  I want to use the PXI-5600 as only a step-down converter of frequencies with the PCI-5640R IF Transceiver card as a digitizer. Can someone help me that how to use or PXI-5600 downconvert mode only (without running a digitizer PXI-5620 or PXI-5142 in the PXI chassis). I found different examples in which NI PXI-5600 is effectively used as PXI-5660 (5600 as a step-down converter frequency and 5620 as a digitizer) and PXI-5661 (5600 as a step-down converter frequency and 5142 as a digitizer) but I want to use the PXI-5600 only downconvert the Rf signal, which then will be fed to the PCI-5640R map.

  Thanks in advance

  Best regards

  RASHID

  Hello

  If you download and install the latest version of NOR-DAMA, a sample installed in the \examples\instr\niRFSA folder usual title DAMA step-down with external digitizer. This illustrates how to program a PXI-5600 as a standalone device using the driver NOR-DAMA.

  As a story - OR-DAMA 2.1 and on will have support for fashion "Buck converter of frequencies only" use the PXI-5600.

  -C

• How can I convert 9213 readings of TC in temperatures on FPGA?

  I use a cRIO-9076 with 9213 module to capture readings from thermocouples (type K).  Is it possible to convert these readings (voltage of the FXP Data reading) in the temperature on the FPGA values?  My goal is then to use these temperatures to control an analog output through a PID.

  According to the specifications, the 9213 should be able to read 8 TC to 100 Hz.  I would like to be able to run as fast PID TC can be read accurately.

  I couldn't find an example of code that does the conversion of temperature-voltage on the FPGA.  The example of getting started is send you the values of voltage of TC to the processor, RT, then converts the tensions in temperatures.  I was not able to get that to run faster that about 50 Hz in one analysis comparative VI.  Once I have add any other code to the RT target, I think I'll have to run a lot slower than 50 Hz.

  Any suggestions / examples / whitepapers can you tell me?

  Thank you

  John

  Hi John,.

  Take a look at the Started.lvpoj get 9211 from the Finder of the example. You can use the same screw of this project to convert volts to your 9213 module temperature. In order to preserve the accuracy of the readings, it is recommended to convert the voltage to temperature in your host VI. The rate of your control loop is not very fast, only so you should be able to run your PID loop and to convert your data to the frequency of 100 Hz to your host VI.

• Wavelet transform scalogram frequency scale

  I've read all the posts on this topic and found no answers, that would be useful for me. However, I found a formula to convert pseudo frequency scale. My client wants scalogram with the y-axis as the frequency of the signal and x-axis as of the time of the signal. I tried to use the multiplier of the graphical indicator property but I can't get the correct values of the frequency in the Y axis. The formula I use is f = Fw / (dt * s) where f is the frequency of nickname, Fw is a center frequency of the used Wavelet (Morlet), dt is sampling the signal time and scale. FW is 0,8125 Hz (at least that is what Matlab tells me), dt is 0.01 s (100 Hz aqusition), the scales are numbers from 1 to 128. Basically I wan't to know how to convert the graphical indicator scale. I drew the correct chart in Matlab, but I must do the same in Labview. I have attached two screenshots.

  Hello

  Well, you can use the property nodes in order to change the scale.

  If you right-click Scalogram, create, property node and you choose the multiplier and offset.

  You simply calculate the offset, it is about 80,61 and the multiplier is on-0,63. And you calculate scale of nickname.

  The use of knots of property you can change a large number of parameters for the scalogram.

  Hope that solves your problem.

  Kind regards

  Ion R.

  P.S. As LabVIEW is an engineering environment, it is not so obvious how you can reverse time :-) (or frequency)

• How to build square 3 ph pulses and use them to trigger the two analog inputs.

  Task:

  1) generate continuous 1 Hz ms 45 pulses on three lines of output offset 120 degrees.

  Other neighborhoods, three phases (three outputs) 120 degrees out, but instead of sine wave should be a volt 5ms 45 along with a second ground pulse. I need these impulses to control an external circuit. The tolerance of 1 Hz is loose, but 45 ms must be at 100 us.

  (2) measure (trigger) two independent DC voltage over 45 ms 50 ms after each front (leader) amount of each pulse. 45 to 50 ms must be 100 us.

  Other neighborhoods, begins each measure 45 ms for the DC source #1 and 50 ms for the source DC #2 after opening (rising edge) of each pulse for total of six measurements per second 1 (by 1 Hz cycle).

  (3) an analog output must provide ongoing (to be booked) negative DC voltage to be used as a source of supply for external circuits.

  I timely when I can generate the 45 Hz by using CO (0) 1 ms pulses continuously and the trigger I (0) on falling edge. I (0) is hard wired to triggering I (0).

  How I do HAVE another (1) and two other lines (two phases) and link them to HAVE (0) and HAVE (1)?

  Equipment: LabView 8.6.2, PCI-6221 (37-pin)

  Hi behappy.

  Thanks for posting and welcome to the forums EITHER! I think we can get what you need with the variety of the 6221 37 pins:

  (1) our machines of the M series have 2 counters, so you cannot generate all the impulses of 3 of these alone. A solution would be to use outputs digital correlated.

  Unfortunately, the 37 pins 6221 has only two IO digital correlated, so you should use a strange mixture of digital meters and IO to implement three impulses. It would still be feasible - for example, you might use a counter for a time base for the digital i/o lines and the other counter to the third output pulse. You would have to match the beginning of the two counters to ensure the phase of your signals.

  2) there are essentially two parts to this question, so I'll try to split:

  (i) combine the three impulses together to generate a single sample signal out of. I think this would be doable on a different set of M with a higher number of digital I/o lines correlated using change detection (see the user manual of M series). However, at this stage, we are just out of digital lines correlated to use, and I don't think that's possible on the 37 pins 6221.

  If you use the 6221 37-pin, which you will probably need to do is to provide your own external circuits OR three pulses together.

  (II) get the 5 ms delay to enjoy your second channel. Since you have already discovered that you can sample the falling edge of the digital signal for the delay of 45 ms, you would just add another delay of 5 ms before taste you your second I. You should be able to do this by setting the clock to convert DAQmx frequency (5ms corresponds to 200 Hz). The clock to convert, it's what actually sampling data (keep in mind that the boards of the M series are multiplexed).

  To do this, simply use the property calendar DAQmx node, then select: more > converted > rate.

  (3) this one is easy - we have not yet used all channels of AO.

  So the 37 pins 6221 is a little less ideal because you have not enough correlated digital i/o to make the generation of pulses or change detection - but he has yet to do the job if you can combine the three impulses yourself outdoors and don't mind not using the additional counter to generate the third impulse.

  I hope this helps, if you need any help to find relevant examples, please do not hesitate to post in return. Thank you!

  -John

• Audio drift

  I have a master HDCAM with stereo mix 29.97i & I try to scan the band to 7 FCP 23.98 p, but have audio drift on the capture.

  The system that I use has a Kona card & I can choose the conversion cross without any problem.

  The image looks fine in a number of tests, but the problem is that the audio that is captured with the image is out of sync.

  Have been doing some research for a similar problem and have not found anything.

  Anyone know what could be the problem?

  Thank you.

  Conversion of output with Kona... good. Conversion at the entrance with Kona... not very good. In fact, with a capture card, you can output and convert the frequency of images very well, but the capture and change, it does not work. Audio drift. Had this 2 Kona, Kona 3 and Decklink cards... and Matrox box. They simply cannot do it.

  Therefore, enter it as 1080i29.97 and then convert to 23.98 after the fact, with compressor.

• 5603 IF given NOR 5761/a. port

  Hello

  I have a composed of digitizer vector signal Analyzer 5622, 5603 frequency step-down converter and synthesizer 5653.
  I also a 6674 t connected to an atomic clock synchronization module and a card 5761.
  Instead of going directly to the digitizer, I am currently trying foods I / data Q If the buck converter of frequencies at the Ch0 of 5761 card input (A/D)
  in order to process the data immediately in the FPGA.

  To get to the point, I'm trying to synchronize the clocks of the ASB and the 5761. as well as the module of synchronization,
  as I am able to get the number correct samples at a certain frequency of sampling to the 5761 entered.
  What I need to do to exclude the digitizer and have the 5761 in lieu of the digitizer?
  I'm quite new to using NI DAMA and Module synchronization tools in Labview, but I've included the VI I am trying to run on the host side at least for
  a Visual idea.

  Richie

  Hi Richie,

  It is possible to generate two different clocks, but you shouldn't need to. The best way to do it would be to spend the clock by Ref Out of 5653 for Clk synthesizer in the digitizer 5761. More information is found in the Starter guide for the SMU-5665. Replace just the 5622 by the 5761.

  The LO is usually set on a certain signal IF according to the RF input to output. I don't think there is a way to change this, but you can set your scanner to wait for the correct values.

  Concerning

• NI 9205 analog incorrect values in multichannel mode

  Hello everyone

  I am actually measuring 10 battery cell voltages (which are connected in series) with a NI 9205 (slot 1) in a frame NOR cDAQ-9172.

  The voltage of each cell is measured in differential mode with channels 0 through 7, 16 and 17. I have no connection to the NI 9205 COM Terminal.

  The other modules in the chassis are NI 9217 (2 modules, slot 2 and 3), NI 9481 (4 locations) and NI 9401 (5 location).

  In my LabView program, I put all the channels of the NI 9205 and NI 9217 modules in a single task, because a single task can function both for the measurement of analog input.

  My problem is that some of the values measured by the module NOR 9205 do not correspond to reality. All of the tensions 10 cells is about 2.60 V (measured with DMM). But, for example, channel 2 shows 2.67. Some channels are right and others are not.

  I tried to vary the frequency of sampling, but this does not really solve the problem.

  For example:

  Sample rate = 1000-online channel 2 = 2.72 V

  Sample rate = 100-online channel 2 = 2.67 V

  Sample rate = 10-online channel 2 = 2.67 V

  Then I tried to put all strings in a single task and allow a task after another. And then it worked!

  But data acquisition is so slow, when you create a single task for each channel and that's why I prefer the way with several channels in a single task.

  I don't know if my wiring should consider all connections to the Earth!

  Thanks for any help!

  Concerning

  Socki

  Hey Patrick

  Your index really helped out me of a jam.

  I had to reduce the frequency of clock to convert my module to HAVE. Now, it works great!

  Sampling rate is 20 and convert clock frequency is 200 (for 10 channels)

  The vi from the following link shows how to change clock frequency convert it (Set convert Clock.vi):

  http://digital.NI.com/public.nsf/WebSearch/42484E84DA98053686256D32006E0494?OpenDocument

  For my module, I had also to choose and connect the "active devices" on the property node DAQmx-Timing.

  Thank you!!

  Concerning

  Socki

• integration of sampling time 6351 vs rate

  I would like to know how the X-series Renault 6351 sample and other. More precisely, given a sampling rate of v and a p sampling period, the integration of each sample time must be less than p. My question is, during the sampling period, what actually happens? It integrates into all of the p? Y at - there a break-in? Is the integration time same p? Are there settings to affect how data acquisition uses the sampling period?

  Basically, what I'm looking for is a complete description of what happens during the p, something like "p/3 running, integration time of 2 p/3.

  So, there are two relevant 'rate' at the time of sampling on a MULTIPLEXED Board like the 6351 OR.  There is the "sampling rate" which is the rate to which we take a sample for each channel, and then there's the 'conversion rate' which is the rate to which each channel is connected to the multiplexer in order to take a sample.  I tried to show below
  :

  Whenever a sample is to be taken, each channel must be connected to the ADC in turn.  Clock convert determines how fast it happens.

  The conversion rate depends on the sampling frequency.  If you choose a sampling frequency that is slow, we wait 10uS between convert each channel to allow more break-in.  If the rate is too fast for waiting 10uS between each layer, we convert as fast as necessary to reach you sampling rates.  At the maximum rate, the jury through each channel as quickly as possible in order to continue.

  During the period of conversion, we do a number of things.  Pass us the multiplexer to the channel, wait for a short time to resolve (this time it's what varies according to the sampling frequency), then we perform the conversion with the ADC (this is what you call 'integration time').  Time and Astro conversion are not user controlled; only the running varies according to your sampling rate and convert clock frequency settings.

  It is not a forumla that I can give you for each of these pieces of how long takes.  The best you can do is read the property of DAQmx Timing "I convert rate.  This will tell you the total rate of switching, settling and conversion.

  What do you need to know the time of integration for?

• 1074118653 error occurred at niRFSA Initialize.vi

  I am currently using NI PXI-1045 to test the unit under test RF signal. I use an exact copy of an example used to NOR-DAMA. The unit under test is connected to the input of the Ni PXI-5600, which is wired with the Ni PXI-5142 create NOR-PXI-5661. When I start my vi, I received the following message "error 1074118653 occurred at niRFSA Initialize.vi.

  Possible reasons:

  The specified device is not supported by this driver.

  "Status code:-223543"

  Please help?

  Kind regards

  Jean-Richard

  OK, then open measurement and automation explore (MAX). Looks like you need to associate the buck converter of frequencies of the digitizer. On the left side of MAX, expand devices and interfaces, and then expand the tree to the chassis. Right-click on the device of 5600 (8 slots) and select Properties, and associate it with your digitizer.

• CompactRIO Deploy Error "LabVIEW: resource not found.»

  Hello

  I use a 9002 CompactRIO and LabVIEW 8.5.  I made a simple FPGA VI to read a bunch of analog inputs and write a square wave to a few analog outputs.  Then, I made an another VI to run on the target in real time in order to convert the frequency scaling and updated entries nationwide cycle duty cycle values and frequency real accountability.  When I try to deploy the VI in real time, I get the following:

  Deployment r03fsae (the goal settings successfully deployed)
  Deployment of special audit Tags.vi (5.89 K)
  Deployment GetRTHostConnectedProp.vi (3,41 K)
  Deployment of search and replace Pattern.vi (8,11 K)
  Deployment nirviFillInErrorInfo.vi (8.09 K)
  Deployment niLvFpgaErrorClusterFromErrorCode.vi (11.27 K)
  Deployment nirviErrorClusterFromErrorCode.vi (5.93 K)
  Deployment error Code Database.vi (3.67 K)
  Deployment to find Tag.vi (10.43 K)
  Deployment of fusion Errors.vi (6.75 K)
  Deployment Whitespace.vi topping (3.71 K)
  Deployment nirio_MultilineStringToArray.vi (8,81 K)
  Deployment nirio_AppVersionToI32.vi (3.96 K)
  Error error Code.vi (23.42 K) Cluster deployment
  Deployment _nirio_device_attrSetString.vi (9.46 K)
  Deployment _nirio_device_close.vi (9.90 K)
  Deployment nirio_Read32.vi (13,07 K)
  Deployment _nirio_device_open.vi (11.59 K)
  Deployment nirio_Write32.vi (13,01 K)
  Deployment _nirio_device_writeBlock8.vi (9.83 K)
  Deployment nirio_Write8.vi (13,01 K)
  Deployment _nirio_device_configSet.vi (11.42 K)
  Deployment nirio_DMAReconfigureDriver.vi (16.63 K)
  Deployment _nirio_device_writeBlock32.vi (9.36 K)
  Deployment nirio_Read8.vi (13.04 K)
  Deployment nirio_DMAStopAll.vi (11,39 K)
  Deployment _nirio_device_attrGetString.vi (13.06 K)
  NirviReportUnexpectedCaseInternalError (String) (5.58 K) .vi deployment
  Deployment of .vi nirviReportUnexpectedCaseInternalError (U32) (4.72 (K)
  Deployment _nirio_device_readBlock32.vi (14.41 K)
  Deployment _nirio_device_attrGet32.vi (13.85 K)
  Deployment nirio_IsItOKToDownload.vi (7.07 K)
  Deployment nirio_MiteNTDeviceFamily.vi (5.30 K)
  Deployment of Format Message String.vi (7.35 K)
  Deployment CORE.vi General Error Handler (51,02 K)
  General Error Handler.vi (13.19 K) deployment
  Simple deployment Error Handler.vi (10.01 K)
  Deployment nirio_CheckDriverVersion.vi (10,58 K)
  Deployment _nirio_device_attrSet32.vi (13,62 K)
  Deployment nirio_Download.vi (29,31 K)
  Deployment nirio_ConfigureRegisterAddresses.vi (7.11 K)
  Deployment nirio_CleanUpAfterDownload.vi (6.22 K)
  Deployment nirio_PrepareForDownload.vi (6.44 K)
  Deployment nirio_EnableInterrupts.vi (13.76 K)
  Deployment nirviRIOSetUpMiniMite.vi (31.23 K)
  Deployment nirio_Open.vi (14.93 K)
  Deployment nirio_Close.vi (10.95 K)
  Deployment nirio_DisableInterrupts.vi (11,10 K)
  Deployment of nirviIntfOpen_cRIO - 9102.vi (85,54 K)
  Deployment of nirviIntfClose_cRIO - 9102.vi (12.24 K)
  Deployment of scale freq and duty.vi (4.46 K)
  Deployment XDNodeRunTimeDep.lvlib
  Deployment XDNodeRunTimeDep.lvlib:loadlvalarms.vi (5.47 K)
  Math.vi sensor deployment
  Could not download the math.vi sensor
  LabVIEW: Resource not found.
  LabVIEW: Resource not found.
  LabVIEW: Resource not found.
  LabVIEW: Resource not found.

  Download completed with errors.

  This error message is not particularly useful, someone knows what could be my problem?  Or how I can fix it yet?  Is there a detailed journal where I can look for more information about the error?

  Thanks in advance for any help!

  Hi David,

  You may be walking on ground dangerous with your fpga code, old and new.  You use the modules in what is known as 'calibrated' calibration mode that is of fixed point math.  Your generation of square wave fpga using whole math, which is normally used when the modules operate in mode calibration "gross". To change the calibration mode, you will need to right click on the module, then select it desired mode to use.  I'm not saying that you do.

  What you need TO do to ensure the proper functioning of your fpga VI is to make sure that you use U32 son of math required and then convert the U32 an FXP using the correct encoding (if it is signed, word length and integer).  In your case the 9263 requires signed word in length, 20-bit, 5-bit all over.  Insert an FXP conversion between the generation of square wave and either create a constant FXP of the appropriate type (or use a control correctly put in place of one of the other 9263 channels [AO0 AO1]) and connect to the node of type of fixed point on the conversion OR define the conversion of fixed point with a right click on the exit node and the appropriate settings in the popup box.

  As for your new code fpga, I don't know why you used a sequence structure that your reading of 18 channels on the 9205 will have 144 microseconds, and each write two channels on the 9263 will take 5 microseconds.  I've not worked on how long will take the square wave generation.

  I do not understand your last question.

  > "I've attached a screenshot of my pwm_out.vi if I remove control of read/write of background, or if I don't use of all none of the analog inputs, it works fine.

  > But as soon as I add the analog inputs it fails... ».

  Did you create a new stream of your fpga_new.vi and referenced in your pwm_out_new.vi on the RT?

  It is difficult to guess what you are showing in the screenshots.  If the project is not too big then maybe you could post here.

  As mentioned above, by JMoto, software versions help.  Check in MAX you have on your PC and also on the cRIO 9002 to make sure that there is no incompatibility.

  See you soon

  Stephen

• Misunderstanding NIDAQmx Timebase revisited

  I use a USB-6251 box with analog sampling controlled by an encoder.  In some cases, the user wants to divide the encoder to achieve a lower sampling rate.  I used code similar to that described in the previous posts on the "misunderstanding NIDAQmx Timebase'.  This solution worked for relatively low sampling frequencies but fails when the sampling frequency is greater than about 120000.

  In this code, if the divisor is 1, the code works to achieve a sampling rate that I can reach, about 500000.  If the divisor is two, and the sampling frequency is less than 120000 when the code is run, it works until the encoeder speed is increased so that the sampling rate is higher than 120000 where sampling simply stops.

  If the speed of the encoder is more than 120000 when code is started, the real divider seems to be increased until the sampling frequency is less than 120000.  No error is returned for each of the function calls.

  I tried several variations of this code and many variations of the value of daq_card.max_scan_rate (s) with no difference in performance.  normally, the value of daq_card.max_scan_rate is 1250000 for box USB-6251.  I tried several different values in the two localities where the value appears in the DAQmxCfgSampClkTiming() function.

  The data is read from the box USB-6251 to a PC 12 times per second.  I tried setting the buffer size just above the minimum for the sampling rate and read times and also well beyond this size without a change in performance.

  My code (edited to remove the error checking):

  sprintf (chanString, "/");
  strcat (chanString, devName);
  strcat (chanString, "/ PFI0");

  If (daqencdiv == 1) / / no division (Division 1)
  {
  connect the sample clock directly to PFI0
  status = DAQmxCfgSampClkTiming (acqTask1, chanString, daq_card.max_scan_rate, DAQmx_Val_Rising, DAQmx_Val_ContSamps, daq_card.max_scan_rate);
                  
  }
  else / / if the encoder must be divided
  {
  Discussion Forum suggestion 18/03/08
  Choose "embedded clock.
  status is DAQmxCfgSampClkTiming (acqTask1, NULL, daq_card.max_scan_rate, DAQmx_Val_Rising, DAQmx_Val_ContSamps, daq_card.max_scan_rate);.

  Select PFI0 as the source of 'the embedded clock.
  status = DAQmxSetSampClkTimebaseSrc (acqTask1, chanString);
  On-board clock divisor value daqencdiv
  Note that this will not work for daqencdiv = 1.
  status = DAQmxSetSampClkTimebaseDiv (acqTask1, daqencdiv);

  }
  Start the task of acquiring
  status = DAQmxStartTask (acqTask1);

  Finally solved this with a lot of help from Sara Lewandroski, (Applications Engineer NOR)!

  The problem occurs because the DAQmxCfgSampClkTiming() function is not always set the clock to convert properly, probably because he does not know the maximum frequency of the external sample clock.

  The solution is to explicitly set the clock converted at a rate that allows to convert the desired number of channels before the next sample happens clock.

  The function to set the clock to convert is:

  DAQmxSetAIConvTimebaseDiv (acqTask1, 20);

  where 20 is 20 MHz clock divider.  With this divider set to 20, the convert clock frequency is 1.0 MHz which is the maximum for the USB-6251 case multichannel.  With two channels, this allows the sample clock to rise to 500 kHz, until the data is lost.

  This function is not a function panel and not every upward in the list of functions within the CVI DAQmx.  The only documentation that I could find is the reference C DAQmx help.  Even there it does not appear in the content, but can be found using the search function.

• Signal conditioning equipment

  Hello

  I need to measure the frequency of several input (from 1 to 200 k) signals with 6024E PCI DAQ cards.  What signal conditoning hardware I need for this the simplest and cheapest way?  IE: convert the frequency of a voltage

  Thank you

  Curt

  A few notes:

  -6024E PCI data acquisition max sampling rate is 200 kech. / s, aggregate. This means that this clock frequency is shared between all channels. If you use a single channel of entry by card, you could reach 200 kech. / s/channel, but if you use two channels, this will be divided up to 100 kech. / s/channel. This is described in the E-Series user manual.

  -C' is relevant because even at a rate of 200 kech. / s, you can only reliable collect information on the frequency of signals slower than 100 kHz according to Nyquist. For the faster cards, see the M Series DAQ.

• LaserJet M451: How can I buy printer HP Laserjet Pro M451 110V version in the United Kingdom.

  I live in England but would like 3 x HP Laserjet Pro M451 printers 110v version for a project on an industrial site. Where can I buy these in the United Kingdom. If I can can can I buy them anywhere in Europe?

  @SimonW68

  Most of America and the Japan Saudi Arabia use lower voltages (110-127 volts, frequency 50 Hz or 60 Hz).

  The rest of the world uses higher voltages (220-240 volts, 50 or 60 Hz).

  So it's probably anywhere in Europe to get 120-127 volts models you want; You'll probably have to import them from the USA.

  @banhien "all I have to do is to have adapters.

  It's usually pretty simple (and relatively cheap) for consumer devices (which some will probably be dual voltage anyway, so no need to voltage conversion adapters).

  But for trade devices, energy consumption is usually rather higher (e.g., 425 watts for LaserJet M451), a suitable step-down transformer (bigger, heavier and more expensive than an adapter) is usually required to run a model 110-127 volts on power supply of 220-240 volt UK; the transformer may need a much more high-power to deal with "turn on" the surge (I dunno if this is the case or not).

  Apparently, the difference in power supply frequency (50 Hz to the United Kingdom, 60 Hz in the United States) is not usually a problem (adapters and step-down transformers only change voltage, not frequency).

• can I recharge the 6s with a source 220/240 volts without voltage converter?

  The s 6 + are attributable to a source 220/240 volts without voltage converter?

  If you mean plug the charger on a 220/240 V source, Yes.  You will however need to a form of adaptation.