Get the value of the frequency of the power spectrum

Similar Questions

• 'power' and 'size' in the power spectrum?

  When I choose "power at the stage of the power spectrum, numbers in my data were negative. I don't understand why. What is the difference between "power" and "ten factor"?

  And what are the "dB" and "linear" in the average of actual size selection? "DB" means the following equation? Vnorm = 20 * log10 (Vnorm)? 'Linear' means greatness?

  Thank you very much!

  
  

• Unit of the y-axis of the power spectrum

  Hello

  I am acquisition of acceleration of an IEPE accelerometer. Units of the axis y of the signal in the time domain are in (g). The signal in the time domain is then injected into the Spectral VI Express measures to obtain the power spectrum of the signal. In the Spectral Measurements Express VI, I put the results of linear and the window (Hanning). My very basic question is: what will be the units of the axis y with the linear option power spectrum and how can convert their return to unit (g). If you provide an example of calculation that would be very appreicated. One of my simple code is attached.

  Concerning

  Unit Conversion VI spectrum lie in LabVIEW palettes: functions > Signal Processing > spectrum analysis

  

• How to increase frequency resolution in the power spectrum?

  All,

  I work on the analysis of data GET vi, and manage mucho when it comes to display a simple power spectrum which gives a precise simulation of sine wave frequency I use now.  Most of the brain waves are between 1 to 50 Hz, and so I try to get a resolution of at least 1 Hz frequency.  However, no matter what I do (increase the sampling frequency, use different sub vi and blocks), the chart plot only in frequency of 10 Hz increments.  I know this must be a simple problem, but I can not find good documentation on this and would appreciate any advice anyone could give on this problem.  I'm racking my brain here!

  Nick

  You need to acquire a second data to get the 1 Hz resolution.  The increase in sampling rate only increases the bandwidth that covers the FFT.

  Frequency resolution = 1/sampling

  Scale of frequency rate of sampling/2 =

  For your application, you will need to have a sample of at least 100 Hz rate.  At this rate, you must purchase 100 samples to get the 1 Hz resolution.  At the 1 kHz sampling rate, you will need to acquire 1000 points for the 1 Hz resolution.

• Collect data from specific frequency of the power spectrum

  Hello

  I want to know how to collect data from specific frequency of power spectrum file. I'm trying to separate data from specific frequency of the original file.

  This will depend on much how your data is stored. You will need a way to read the file in LabVIEW and then a way to identify the data you want. I often record data in a .csv file, then I use "Reading worksheet" to get the data in a table. Then, you can simply use 'Index Array' to get the datapoints you need.

• M60 - 135: where can I get the Power Saver utility?

  Hello!
  where can I get the utility for power management of toshiba for my m60-135? in the download category is not one. can I take from one series of other energy saver?

  Best regards
  Thomas

  Hello

  Well, I n don't know why, but on the Toshiba Europe site I can t find the saver of energy for your device.
  As far as I know your laptop comes with TOSHIBA Power Saver V1.32.0.3C.
  But on the Toshiba USA page, I found this tool for any other machine (Satellite M60-S811ST)

  http://www.CSD.Toshiba.com/

  I m not 100% sure, but you can try to install this version. Maybe it works.

  Good bye

• BER in the power spectrum

  Hello

  I have a question about BER and SNR and I would appreciate your help.

  I have a power Spectrum (live with the presence of interference) and I would like to know in what parts of the spectrum, I can achieve a target BER (lets say 10th-3)

  My suggestion was to first determine the signal investment ratio on the graph (for BPSK) and then search for available positions in the spectrum that can give me this SNR

  So say for 10-3 BER, en No. DB 9 (on the graph)

  If Eb (dB) = 9 (dB) + No. (dB) or Eb (dBm) = 39 (dBm) + No. (dBm)

  now my questions are?

  1 - instead of BER can I focus on NRS and are my calculations correct?

  2-noise background in my power spectrum is observed from BDP-110-130 dBm is not a value constant .what should I do in this situation to find Eb?

  3. What about interference? because WLAN is perhaps the received power - 50dBm in this situation that the SNR appropriate therefore to achieve this BER?

  is it correct to say Eb should be = - 50 + 39 (dBm)

  I thik find positions them avaiable in the spectrum (especially 2.4 GHz) to achieve a certain BER or SNR should not be as easy as I think.

  Hi tintin99, the calculation seems to me.

  For the second question, I don't know what application you are considering, so it is difficult to answer. If you measure performance to highlight, I'd go for the peak noise. To help us to give an exact answer, you provide more information about your application. For example, NEITHER-6115. The following link will be useful: NOR-6115 noise floor.

  In case you're only interested in theoretically calculate the background noise, please check for the radio receiver noise floor. According to the definition, you can calculate the background noise as follows:

  Background noise =-174 + NF + 10 log bandwidth

  Where NF is the noise figure.

  I hope my answers help. Still once, for questions related to the concepts of communications, please try discussion forum, I mentioned above. RF meter of NOR, please post to measure RF devices

• Coercian dot on the power spectrum

  Hi all

  Was just curious to know why I have a point constraint on my FFT power spectrum when it fed a waveform?  I thought (and detailed help is agree with me) that a waveform has been the type of entry required.  There may be more going on here that I realize, but clearly I'm not.

  As a sidenote, I'll you this because I replace an express VI in an application, that they gave me to end up and the express power VI spectrum seems to give results that are disabled by the square of the input function.  OK then that sentence makes little sense, what I mean is when I plug a function up to my DAQ board generator and supply a sine to a known frequency spectrum of power express VI sets out 16 Hz instead of 4 Hz, 2500 instead of 50.  The spectrum of normal power VI works fine.  Do not Express VI anyway but just curious.

  Thanks in advance!

  Is the matrix Y DBL?  SGL or EXT would produce a dowry of coercion.

  Lynn

• Having trouble getting the power of virtual machine state

  HI I have a problem with the addition of the Powerstate VM to the following code:

  Get-data center $DC | Get - Vm | Get-View |

  Select @{N = "VM"; E={$_. Name}},

  @{N = "#NIC"; E={($_. Config.Hardware.Device | where {$_-is [VMware.Vim.VirtualEthernetCard]} | Measure - Object). County}},

  @{N = "#MAC"; E = {[string]: join (",", ($_.))} Boulevard | where {$_.} MacAddress as ""00:50* "} |" %{$_. MacAddress}))}},

  @{N = "IP addresses"; E = {[string]: join (",", ($_.))} Boulevard | %{$_. Ip_address}))}},

  @{N = "Power status"; E={$_. PowerState}} |

  Export-Csv $FilePath - NoTypeInformation - UseCulture

  What I am doing wrong?

  Thank you

  Why it doesn't work it's because this property does not exist on the object SDK your get when you do Get - VM | Get - view. If you use just Get - VM it would work, but it may break some other information you want to recover. To get what you want with the least changes would probably change "$_.» PowerState' to ' $_.» Runtime.PowerState ".

• Where can I get the power sources and accessories for the Xbox 360 in India?

  XBox360 power supply model: NHPD-186DB a 110-240 v / 203W

  Hello

  Microsoft - India
  http://www.Microsoft.com/en-in/default.aspx

  XBox - India
  http://www.Xbox.com/en-in

  XBox - India - support
  http://support.Xbox.com/en-us/?XR=shellnav

  Major retailers in the region may also be able to help.

  ========================================================

  These are the resources of the United States and it should be similar for Microsoft India.

  XBox - Support<-- best="">
  http://support.Xbox.com/en-us/pages/default.aspx

  XBox - Contact us (support)<-- best="">
  http://support.Xbox.com/en-us/contact-us

  XBox - Support Forums - and my XBox (top-right)<-- might="" be="" some="" good="" information="">
  http://forums.Xbox.com/

  Xbox technical support phone number

  • Toll-free: (800) 4MY-XBOX or (800) 469-9269

  I hope this helps.

  Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle=""><- mark="" twain="" said="" it="">

• G56 Windows 7. : get the power back. the password

  Locked put the entire computer. Password administration & power on password is incorrect. Disabled system. 66517742

  Hello

  Enter: 79475384

  Kind regards

  DP - K

• How can I get the data view to display the same amount of time I save?

  I use the Sound and Vibration Measurement Suite.  In the data view, I display a graph of time, the power spectrum, the Color Map and the waterfall.  I am also showing strength in numbers group for several bands and doing cutting-edge research.  I record 100 ms of the transient wave.  In the data view, why the temporal plots show several seconds of data?  What determines how much time will appear in the data view?  More important, the power spectrum reflects the power for the entire of several seconds of data displayed?  Same question for power in the values of band and cutting-edge research.  I want to just this data displayed for 100 ms of the wave that I record.  So, how can I get the data displayed (waveforms) and power numbers come only 100 ms of the recorded wave?

  Finally, what is the best way to make account concisely the recorded data?  By slide numbers on the Documentation tab is not concise, because it comes with graphics, etc..  I tried save as ASCII/LVM, but I get a bunch of stuff intermiated I don't care.  Help?

  Hi TimRsandiego,

  SignalExpress is programmed to display graphs with default scales based on the type of action, it's reading. These scales and settings can be changed by right-clicking on the graph, and then select Properties.

  If you are interested to learn more about how to use SignalExpress, I would recommend checking out some demonstrations/tutorials on NI.com. You can find some of these demos at the following location:

  Let me know if you have any other questions.

  Kind regards

• How to get the fft for my xy graph?

  Hi, I'm Jean,

  I traced xy graphic for an excel file.

  I converted excel file in text file and saved as a .lvm file. now I need to find the fft for this xy graph.

  I will attach my text files and my vi.

  Please, someone put the program and send me quickly.

  I need urgent...

  Here is a simple way to resample the data for a linear ramp of x and make the power spectrum. Modify if needed. (LabVIEW 2011)

  (Fortunately you don't need to worry about the artifacts because each spectral component contains a whole number of cycles in your data)

• the power of the spectrum graph and butterworth filter

  Hello

  I am beginner in labview, I want to see the power spectrum of the sound samples, I want to see if there is any reason in these samples.

  I use spectral measure, and then I filtered with butterworth filter samples. For output I using waveform graphs.

  Before filtering the signal, I'm in the x axis of the graph between 0-22500 and the data mostly in 0-2500.

  I've tried to filter using these values (fs = 1000 Hz, 0.125 hz = fl and fh = 500 hz) and the graphics almost the same thing but the axis of the graph is between 0-0, 5.

  issues related to the:

  What is the x axis properties? Why is different, but the graphics are the same?

  Make the mistake with the program?

  Hi Limavolt,

  You have a problem with the bandpass filter VI, this VI generates only the signal of value i.e. table DBL. The signal is a cluster.

  solution 1: you need to calculate 'dt' using the sampling frequency and use VI waveform construction to generate a signal's own scaling. 

  Normally, dt = sampling frequency/No. samples

  Solution 2: replace the VI butterworth filter with filter VI express, this will produce signal without scaling.

  

• bandwidth of the function "power spectrum".

  I use signalexpress 2009. To analyze the acquired time signal from the area of the previous step in the same project, I applied the power spectrum function.

  DAQmx Aquire step is configured as follows:

  Acquisition mode: continuous samples

  samples read: 1024

  Rate (Hz): 1024

  With this configuration, I expect a bandwidth of 0-512 Hz power spectrum analysis. Instead, the function of the power spectrum gave me 0-820 Hz frequency components.

  How can I trust the result of 512Hz on?

  I've attached screenshots of:

  (1) my application project configuration

  (2) result of frequency domain

  Very useful information, thanks to you both for helping!