Signal processing tools: spectrum analyzer, equalizer available?

Are there any plug-ins or scripts to perform spectrum analyzing (shows the distribution of frequencies), and an equalizer (multiple band pass filter)?
Why is there a high-pass filter, but no low pass filter?
(using cs4)

Math abstraction notwithstanding, the results are not the same. For one thing I get problems with using blur around the edges of an image.
But even beyond the edge issues...
In the case of my example - preparing for a luminance flattening operation - the blur combines the data from all the background sky glow with that from the stars, and so the result contains pixel values derived from both. A high pass operation then subtraction leaves me with the background sky glow alone and only eliminates the stars (light spots) and dead pixels (dark spots). If I choose to combine so as to allow only darkening then I keep the dark spots and eliminate only the stars.
Am I missing something here? Are you saying the sky glow somehow influences the result from the high pass filter operation as well, so that the resultant sky glow after subtraction is affected?
I guess what you're saying is that High Pass is based on blur under the covers then?
-Noel

Similar Messages

Communications between LabVIEW and spectrum analyzer

hi, im a beginner in LabVIEW and spectrum analyzer, and im now trying to let LabVIEW captures signal coming from spectrum analyzer. i have all the required components needed but i have totally no idea how to get started, is there any exercises or labs available here?

It will depend on your method of communication with the device. If it is RS232 you can go to the example finder (Help > Find Examples) and search for RS232 or however you plan on communicating with the device. Or you can browse the catagories for examples on various topics.
Depending on the device the manufacturer may have LabVIEW drivers on their web site. But anybody will need more information on the analyzer and the signals before you can be helped.

IVI Support for Spectrum Analyzer/Signal Gen

Did anyone implemented IVI driver for Spectrum Analyzer or Signal genetrator according to the IVI foundation specifications?
When will NI support these types in the measurement studio?

Hagay,
We are working to update our IVI architecture to be compliant with the latest IVI Foundation specifications, including support for the Power Meter, Spectrum Analyzer, and RF Signal Generator classes. Furthermore, support will be available for both MeasurementStudio, LabWindows/CVI, and LabVIEW.
While National Instruments will have a select few instrument specific drivers available for the new classes, you should be able to obtain drivers from instrument vendors.
Bankim Tejani
Instrument Driver Group
National Instruments

RT Spectrum Analyzer and Fluctuating Signal reading

Hi There,
I am just wondering if anyone can help me. I am quite new to LabVIEW. My first problem is that the input coming in from my cRIO is fluctuating. Basically my setup is thus: a cRIO, an NI 9205 module, a geophone. When I try to take RT data in and show on a graph it fluctuates. I have attached a printscrn of it. It appears like a sine wave.
My main question is, I am wondering if there is any way in LabVIEW to analyze an acoustic signal in RT with a spectrogram? I have looked around online and there seems to be ways of doing it but there are just videos and pages demonstrating the results rather than how to go about creating a RT spectrogram.
Perhaps someone might be able to point me in the right direction?
Attachments:
cRIO.jpg ‏61 KB

Hi kelOb,
Spectrogram is a set of advanced signal processing functions which are quite complicated and cannot be used in real time VI because the determinism of real time application. Hence you will need two vis in your project: one host vi which will run in windows dealing with signal processing and one cRIO vi which run in the cRIO hardware only to acquire data. The bridge between the host VI and the cRIO VI is the network published RT FIFO, which is similar to a queue but can be used to transfer data between Vis.
Attached is an example project showing you how to analyse the RT data in spectrogram.
If you have any other concerns please let me know.
Attachments:
Spectrogram.zip ‏21 KB

Controlling signal generator, spectrum analyzer

Hi,
I want to automate 8656B signal generator(HP make),8590A spectrum analyzer(HP make) using labVIEW 8.6.I'm using GPIB interface to connect the instruments.Do I've to install drivers for signl generator and spectrum analyzer?what should I do?can anyonet ell me from scratch.
Thanks
kiranmayi

You should also get both the programming manuals for the instruments. Remember that Labview drivers is not really drivers. They are more a program for controlling some instrument. The are seldom complete, regarding all instrument functions. Use them as a base for your own application
Steps:
1 download the driver
2 Unzip to a separate folder
3 Read the documentation
4 Test the "driver"
5 Good Luck, post again if you are stuck
Message Edited by Coq Rouge on 08-14-2009 09:49 AM
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

Premiere Pro Equalizer with Frequency Spectrum Analyzer?

hi everyone, does anyone have the 411 on how to get a visual spectrum analyzer working with any of the Premiere Pro audio EQ's>? There is a very nice EQ in the audio effects of Premiere, but when i play my files, the playing frequencies are not displayed on the EQ interface ... it's one thing to adjust the EQ by ear, but it would be really helpful to SEE what frequencies are blown out or what have you.
Thanks!

I think you will have to use audition for that

Signal processing of AFM (DC) signals using labview

I am trying to conduct FFT analysis on DC signals from the thermal fluctuations of a cantilever (liquid operation) from a Nanoscope III multimode AFM. Our DAQ board is PC6110E. I am using one of the available signal processing examples to process the signal, but we find that there is a lot of noise in our resolved spectra. Similar work using a SRS spectrum analyzer yields very good and clean spectra. Is there any amplification/filtering etc. that can be implemented before or after the DAQ board that can eliminate/reduce this noise? The frequencies of interest of our signal is between 5-100 kHz. Thanks in advance.

Hello;
If the range of frequency would not so extense, you could use one of the NI signal conditioning modules. However, as that is not the case, you will probably need to implement a filter, in Software, to get rid of the harmonics with higher frequency than 100KHz.
Furthermore, I'm attaching a good Application Note that talks about noise on DAQ systems, so you can get some usefull information, and maybe apply some of the techniques on your system to avoid noise.
Hope this helps.
Filipe
Attachments:
Field_Wiring_and_Noise_Considerations.zip ‏196 KB

2d wavelet signal processing - need some clarification

Hello:
I am using the advanced signal processing toolkit and doing some extensive wavelet processing in both 1-d and 2-d.
In 1-d, when processing waveforms, using discrete wavelet transform-based multiresolution analysis, 2 "coefficients" are produced depending on the "level" chosen. These coefficients are known as the "approximation" and the "detail." The approximation at level 1 is the summation of the approximation and detail at level 2. The approximation at level 2 is the summation of the approximation and detail at level 3. And so forth. See fig. 4-5 on p.4-6 of the Wavelet Analysis Tools user manual.
I want to consider the same analogy in the 2-d case. In the wavelet transform of 2d images at any particular level, 4 coefficients are produced. (See the manual, pgs. 4-7 and higher.) These are labeled low_low, low_high, high_low, and high_high. My interpretation of this is that low_low is the equivalent of the "approximation" and the other 3 coefficients comprise the "detail." I thought then by summing the 4 coefficients at one level (egs. level 2) would produce the approximation at the level just above it (level 1). When I test this out, it does not give the expected result.
I wonder if someone who helped produce the toolkit can clarify how one gets the "approximation" and "detail" coeffcients from the 4 produced coefficients and how they relate to the approximation at one level higher.
Thanks,
Don

Let's extend the analogy of the 1-d and 2-d cases further. First, look at the Advanced Signal Processing Express VI entitled "Multiresolution Analysis." In that VI, one can see that the time domain waveform (1-d) is transformed to its power spectrum which is broken into subbands based on the number of levels chosen. The subband closest to the origin of the power spectrum represents the "approximation" and the other subbands are associated with the "details". One can see that there is one approximation level and multiple detail levels associated with the power spectrum subbands regardless of the number of levels chosen. This express VI allows one to choose whatever combination of approximation and details to reconstruct the signal, thus providing a potentially multiple bandpass / bandstop reconstructed signal.
Fast forward to the 2-d case where I would like to do the same thing. The analog to the 1-d power spectrum would be the 2-d spatial fourier transform (see attached). I am devising a similar visualization method to draw the "subbands" on top of the fourier transform as shown by the blue lines and filled rectangles demarcating mouse-selected regions D3 and D1. However, for the 2-d case, the way I see it, there are actually 3 details associated with each level as mentioned in the above post (low_high, high_low, high_high) and 1 approximation (low_low). The questions then are:
1) how does one synthesize the 3 details (low_high, high_low, high_high) into 1 composite detail for a specific level so that the visualization method I propose for the 2-d case is consistent with that shown for the 1-d case in the Multiresolution Analysis Expresss VI? Do we just add the 3 details? When I do this, I get a great composite detail image that combines the details of rows, columns, and diagonals - but still not sure if it is the proper way to combine the 3 details.
2) how does one perform a reconstruction (inverse wavelet transform) with only the selected subbands for the 2-d case? I have attempted some reconstructions using the WA Inverse Undecimated Wavelet Transform, but the inverse transform does not appear to behave correctly without the use of all coefficients (low_low, low_high, high_low, high_high). In the 1-d case in the Express VI, one can see that only the selected subbands can be used to reconstruct the waveform.
Any help regarding these issues is greatly appreciated.
Sincerely,
Don
Message Edited by DonRoth on 05-22-2007 09:58 AM
Attachments:
wavelet deconstruction and reconstruction.png ‏196 KB

Using NI PCI-5640R as Real-Time Spectrum Analyzer

Hi,
The code for NI PXIe-5641R Real-Time Spectrum Analyzer demo is posted HERE for LV 2009. I want to use the same code for NI PCI-5640R instead of NI PXIe-5641R. Since I am using a 5640R, I have changed the device in the project.
Can any one guide me what else changes I have to make in this Demo code so that I can use the same code for NI PCI-5640R
instead of NI PXIe-5641R?
Thanks and Regards,
Rashid
Solved!
Go to Solution.

Hi Eug,
It sounds to me like you need to go back and re-install support for LabVIEW 2009 and 2010 through the NI-RFSA driver. You can do this through Add/Remove Programs. Select National Instruments "Change/Remove" and when the pop up window comes up select NI-RFSA and select "Modify." This will re-load the installer for NI-RFSA and through there you can add/remove support for versions of LabVIEW. Make sure that LV 2009 and 2010(if you're using it) are selected.
As for your application, if I understand you correctly your setup goes something like PXI-5600»PXIe-5641R»PXI-5610 (»PXI-5690?). If you're just trying to acquire a signal on the 5641R and amplify it digitally before replaying it on the AO port, then you could try to use the example code "ni5640R Analog Input and Output" that is found here:
C:\Program Files\National Instruments\LabVIEW 2009\examples\instr\ni5640R\FPGA\PXIe-5641R\ni5640R Analog Input and Output\
as a base to follow, but you'll need to modify the code so that you're not providing the AO data from the host, instead you'll re-route the AI data on the FPGA through some amplification block and then feed that to the AO port. If you're including the 5600 and 5610 in this process, then that modified example will just need to include some code on the host to setup the 5600 for downconverter only mode and the 5610 for upconverter only mode. There are examples of this that you can find in their respective driver examples:
C:\Program Files\National Instruments\LabVIEW 2009\examples\instr\niRFSA\RFSA Downconverter with External Digitizer.vi
C:\Program Files\National Instruments\LabVIEW 2009\examples\instr\niRFSG\RFSG External AWG (5610).vi
The addition of these last two pieces of code will make this modified example look a lot like the code that NAyer linked above without the FFT processing.
I hope this helps.
Chris W

Where can I find Labview drivers for the RSA 3308A Spectrum Analyzer

I need to use Tektronix's Spectrum Analyzer RSA 3308A as a LabView environment
instrument for my school project, I would like to know if there are available
drivers, if no drivers are available which are the implied software/software
requirements to achieve this goal.

NI doesn't have a driver and I couldn't find one on Tek's web site. That seemed kind of strange to me so you might want to contact Tek directly and see if they have something. If that comes up blank, you have several options. LabVIEW has the Instrument I/O Assistant (on the Instrument I/O palette), that will alllow you to create a series of writes and reads to an instrument and parse results. The assistant lacks flexibility but if your needs are fairly simple, it might be all you need. Of course, you'll need to be familiar with the instrument's command syntax. A step up the assistant is to use a series of VISA Read and Write commands. These would commands similar to what you would use with the assistant - tailored specifically for your application. You gain some flexibility because you can easily vary the command parameters with LabVIEW variables. At the top of the complexity ladder is developing a full blown instrument driver yourself. NI has some great tools to make this easier than it has ever been before. The guidelines and links to the tools can be found here. Lastly, you can request that NI develop a driver here. There is no guarantee the they will develop it as they base that decision on things like how many requests they get for a particular instrument.

I am using the Order Analysis Toolkit and want to get more information about the compensation for "Reference Signal Processing", which is scarce in the manuals, the website and the examples installed with the toolkit.

I am using the Order Analysis Toolkit and want to get more information about the compensation for "Reference Signal Processing", which is scarce in the manuals, the website and the examples installed with the toolkit.
In particular, I am analyzing the example "Even Angle Reference Signal Processing (Digital Tacho, DAQmx).vi", whose documentation I am reproducing in the following:
DESCRIPTIONS:
This VI demonstrates how to extract even angle reference signals and remove the slow-roll errors. It uses DAQmx VIs to acquire sound or vibration signals and a digital tachometer signal. This VI includes a two-step process: acquire data at low rotational speed to extract even angle reference; use the even angle reference to remove the errors in the vibration signal acquired at normal operation.
INSTRUCTIONS:
1. Run the VI.
2. On the DAQ Configurations tab, specify the sample rate, samples per channel, device and channel configurations, and tachometer channel information.
NOTE: You need to use DSA PXI-447x/PXI-446x and PXI TIO device in a PXI chassis to run this example. The DSA device must be in slot 2 of the PXI chassis.
3. Switch to Extract Even Angle Reference tab. Specify the number of samples to acquire and the # of revs in reference which determines the number of samples in even angle reference. Click Start to take a one-shot data acquisition of the vibration and tachometer signals. After the acquisition, you can see the extracted even angle references in Even Angle Reference.
4. Switch to the Remove Slow-roll Errors tab. Click Start to acquire data continuously and view the compensate results. Click Stop in this tab to stop the acquisition.
ORDER ANALYSIS VIs USED IN THIS EXAMPLE:
1. SVL Scale Voltage to EU.vi
2. OAT Digital Tacho Process.vi
3. OAT Get Even Angle Reference.vi
4. OAT Convert to Even Angle Signal.vi
5. OAT Compensate Even Angle Signal.vi
My question is: How is the synchronization produced at the time of the compensation ? How is it possible to eliminate the errors in a synchronized fashion with respect to the surface of the shaft bearing in mind that I am acquired data at a low rotation speed in order to get the "even angle reference" and then I use it to remove the errors in the vibration signal acquired at normal operation. In this application both operations are made in different acquisitions, therefore the reference of the correction signal is lost. Is it simply compensated without synchronizing ?
Our application is based on FPGA and we need to clarity those aspects before implementing the procedure.
Solved!
Go to Solution.

Hi CracKatoA.
Take a look at the link bellow:
http://forums.ni.com/ni/board/message?board.id=170&message.id=255126&requireLogin=False
Regards,
Filipe Silva

How to read the data in spectrum analyzer (Anritsu MS2661C) and put it in Excel using Labview

Hi all, I'm new to using the labview, and I have some trouble doing my project using the labview software.
I have been trying to use the spectrum analyzer (Anritsu MS2661C) which connect to computer using the GPIB connection.
I have got the instrument driver which can write and control the instrument using Labview 2010.
and my Question is how do read the data or result from the spectrum analyzer and send it to the microsoft excel?
Do I need to use other software or programming to do this step?
If anyone know how is this done, please let me know.
Regards,
Ery

Hi ery,
In order to send data that you have read in from an instrument to Excel, the most convenient way to do this would be to use our Report Generation Toolkit. The Report Generation Toolkit is a very useful tool that allows you to interface to Microsoft Office software from LabVIEW, including Word and Excel. I am not sure if you are familiar with this, but I have attached a link that explains more about the Report Generation Toolkit below.
Another way would be to use the Write To Spreadsheet File VI. While this will store your data to a spreadsheet data file, it will not allow you to programmatically perform any Excel formatting like the Report Generation Toolkit offers. I have also attached a link to some information on the Write To Spreadsheet VI below.
Also, be sure to check out the Example Finder in LabVIEW for a number of examples on how to write data to a spreadsheet file. From LabVIEW, you can go to Help»Find Examples to launch the Example Finder. From there, you can search for "spreadsheet," which should populate examples for use in different applications. I hope this helps, ery. Please let me know if you have any further questions about these!
NI LabVIEW Report Generation Toolkit for Microsoft Office
Write To Spreadsheet File VI
Taylor G.
Product Support Engineer
National Instruments
www.ni.com/support

Signal Processing and LabVIEW Expert Full Time Position – London, UK

1x Signal Processing and LabVIEW Expert - Full Time Position – London, UK
1.0      Description:
As a Signal Processing/Software Engineer, you'll be part of a team that is responsible for developing applications based on large high speed data analysis for a large green energy project. Your skills must include a knowledge of Waveform analysis and understand the concepts of cross correlation, Fourier Analysis, Spectral analysis and other similar items.
The position ideally requires someone of CLA level of LabVIEW program to act as the project lead on the programming and technical levels of the system.
2.0      Duties and Responsibilities:
The duties and responsibilities of this position include, but are not limited to, interacting directly with customers to program, train, inform, advise and consult in the design of their applications using the best test and measurement hardware and software by:
◦     Programming memory and speed efficient applications using LabVIEW and Object Oriented Programming and Event-based architectures.
◦     Understanding of the data acquisition side of the system and previous experience using National Instruments hardware and DAQmx
◦     Knowledge of Power engineering, Volts, Amps, current, Power Factor etc.
◦     Providing timely, accurate and effective solutions to technical problems.
◦     Providing guidance on the installation and working functionality of both software and hardware, including explanation of configuration settings.
◦     Reproducing and troubleshooting problems and incompatibilities.
◦     Delivering technical presentations and demonstrations to customers, colleagues and partners.
◦     Ability to project manage and understand how to keep on track with a Microsoft project based externally monitored project.
3.0      Qualifications & Requirements:
◦     Minimum second class higher honours degree in engineering or science related field, such as electronic engineering, physics, mechatronics or computer science.
◦     Basic Knowledge of text based programming languages.
◦     Experience in either LabVIEW, minimum of three years full time and at CLA level, or capability to reach there in a short space of time with the relevant training.
◦     Experience in a second language such as JAVA, C and C++ is strongly preferred.
◦     Have a vast experience of signal processing, both digital and analog.
◦     Although not required, but must have skills to pass the Certified LabVIEW Developer exam and CLA within the year.
◦     Ability to learn new skills/languages/applications quickly (MATLAB, JavaScript, STK, etc.).
◦     Knowledge in instrumentation & control, and industrial automation, is strongly preferred.
◦     Must be able to handle multiple tasks and enjoy working with people.
◦     Strong problem solving skills to analyse the problem and think creatively to provide a solution.
◦     Excellent written, oral and presentation skills are key.
◦     Ability to deal effectively with customers to make them successful is essential.
◦     Ability to get along with others and function as a team player as well as work effectively alone.
◦     A proactive/can do attitude is vital and a positive outlook on problem solving.
◦     Legal right to live and work in the UK. Sponsorship is not available.
◦     Must hold a full valid UK driving license.
4.0      Location:
This role is located in London, UK
5.0      Reporting:
Signal Processing Engineers will report to the Technical Director.
6.0      Salary:
Competitive salary based on level of experience.
7.0      Application:
To apply for this position please send a copy of your CV to
[email protected]
Please state the job title of LabVIEW Signal Processing Engineer in the email subject.

Hi,
I am from india.I can able to complete the projects through the internet itself.
Please let me know if any demos required to show my expertation.

Sound Input Read Spectrum Analyzer

I am working on a project with Arduino to do a spectrum analyzer. The LVIFA part of it is working fine.
The part that I am struggling with is the audio input.
I am using the Sound Input Pallet.
My troubles are two-fold.
1. A single read takes quite some time and I need to have a pretty quick response. I decreased the samples per read and came up with problem #2.
2. I can get one read out of the Sound Read In and then the VI locks up. I have my timeout set to 1 Sec and it never times out. I have to restart LabVIEW.
While it would be nice to have this VI working, I'm not even sure that I am using the correct tool. If I am going to be running an audio spectrum analyzer display off of the data input, I need to response to be within a few mS (ie. <200) so that it looks visually correct.
If this library will not achieve this, then I need to look into a different tool.

Hi,
I have a similar project, actually I am using a Audio frequency range as input to the Arduino and do an FFT to receive the spectrum out of it.
See the YOUTUBE video I did and the code in *.jpg. I took actually the Continous Input example and modified it.
Hope that helps.
Keep me posted, since we might work on a same project.
http://youtu.be/aqzyofQHXDM
Y3G
Attachments:
Uno Blockpanel.JPG ‏104 KB
Uno FRONTpanel.JPG ‏99 KB

LabView drivers for Agilent 54830B scope or E4402B Spectrum Analyzer?

Where can I find LabView drivers for the Agilent 54830B scope and the E4402B spectrum analyzer, or at least a driver for another instrument in the same families that I could modify? There are none on the NI site or the Agilent site.

One thing that I have done several times is get a LabWindows CVI
driver from Agilent. You will be provided with a .fp file. LabVIEW
has a link under the Tools>>Instrumentation menu that allows you to
"Import CVI Instrument Driver." This will take the function calls
from CVI and build a set of VI's with the same name. The vi's will be
wrappers for a dll that is used by CVI and other text based languages.

Signal processing tools: spectrum analyzer, equalizer available?

Similar Messages

Maybe you are looking for