Average mode DSOX2002A

Deseo obtener las formas de onda medidas en los 2 canales del osciloscopio DSOX2002A cuando configuro el mismo en modo de Acquire Average, pues utilizo el código de ejemplo: "Agilent 2000 3000 X-Series Acquire Waveform.vi" pero no obtengo las formas de onda, sólo las obtengo cuando configuro el modo Acquire en Normal.
Hay alguna sugerencia que me pueda proporcionar?
Muy agradecido.

Yo también tengo el mismo problema con este instrumento Agilent. En Modo Average simplemente no grafica ninguna señal. ¿Esto es correcto?¿falta alguna secuencia de comandos Agilent en el VI?
Muchas Gracias.

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Average, Mode, Pass/Fail

Hello there, i'm very new to Java and so am a bit stuck at this program i'm trying to do. I can get the minimum and maximum okay, but need help with getting the average. If anyone can help me it'd b e much appreciated.
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static int ave(int[] t)
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Digitizer / Oscilloscope USB-5132 Internal Averaging Option?

The DS5132 USB digitizer / scope from NI does not support multi record acquistion. Multi record acquistion would allow to internally save multiple measurements triggered by hardware triggers and therefore significantly reduce the overhead that comes in when the unit is read out via USB. My question is, does the DS5132 driver support some kind of hardware averaging though? A lot of scopes have an averaging mode and it would be great if I could internally average waveforms before reading them out. That said, I am not sure how comercial table top scopes handle averaging and it might be just done via software.
Thanks for input,
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Erik,
Unfortunatelly, like most of the NI oscilloscope product line, the 5132 only does averaging in software.
-S

Acquire date from agilent dso3104 in avraging mode

hi
i am trying to acquire data from agilent dso 3104 x in labview . when i configure my dso in normal mode it is acquiring data but when i configure my dso in avraging mode it is not acquiring data on lab view

I am running labview code for DSO "Agilent 2000 3000 X series" (downloaded from http://forums.ni.com/ni/attachments/ni/140/47325/1/agilent_2000_3000_x-series.zip). VI examples: "acquire waveform single" / "acquire waveform continuously", but it only acquires in normal mode. whenever i change to average mode manually or through "configure acquisition" VI, i get the same error message: No data for operation on PC as well as oscilloscope and Query unterminated.
Pl find attached the error message.
If i run "read current waveform" VI , even then , averaging mode is not being supported.
I have not changed the default time out values in the default VI's or sub VI's. Pl advise on what values to take for sampling in 5Gsa/sec and averaging mode in 256 samples DSO setup.
Attachments:
error.jpg ‏40 KB

Acquire data from agilent dso 3104 in avraging mode

Hi. I’m trying to use the Oscilloscope Agilent DSO-X-3104 A with the LabVIEW 2010. My problem it’s about read a waveform for a channel, when I had configured the acquire mode on average. I.E. When I use the example code “Read Waveforms (Single).vi” located in the public data directory of the “Agilent 2000 3000 X-Series” I read the waveforms when the acquire mode is normal (the example code could plot the waveform), but when it’s on average, I don’t obtain anything (the example code couldn't plot the waveform). Maybe there is something that I’m not considering, could you advise me?

I am running labview code for DSO "Agilent 2000 3000 X series" (downloaded from http://forums.ni.com/ni/attachments/ni/140/47325/1/agilent_2000_3000_x-series.zip). VI examples: "acquire waveform single" / "acquire waveform continuously", but it only acquires in normal mode. whenever i change to average mode manually or through "configure acquisition" VI, i get the same error message: No data for operation on PC as well as oscilloscope and Query unterminated.
Pl find attached the error message.
If i run "read current waveform" VI , even then , averaging mode is not being supported.
I have not changed the default time out values in the default VI's or sub VI's. Pl advise on what values to take for sampling in 5Gsa/sec and averaging mode in 256 samples DSO setup.
Attachments:
error.jpg ‏40 KB

Average Balance Key Figure

Hi,
I have typical problem in FIAR Query. For the given Customer (say 1000170) having several Customer Classes like A, B, C etc.. and I need to find out AVERAGE BALANCE for Each Customer.
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Please advice me

Im not sure i understand correctly but when calculating average you need to multiply line-item wise and then divide by the total. So you can make a new key fig called axb and do the multiplication in the transfer rules and divide to get the average in the query itself.
I hope I have answewed your question.

Third octave operations with "sound and vibration toolkit"

Hi!
I’m working about third octave decomposition with a vibration signal.
I’m using the sound and vibration toolkit.
The sample frequency of my signal is 2400 Hz.
And I’m working with a 1 second vibration signal (so 2400 points).
Fs = 2400
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I need to understand the different and successive operations that the “SVT Fractional-octave Analysis [IEC].vi”VI do.
In fact, I think that my frequency resolution (df = Fe/N=1Hz) is too low.
Do you have a solution?
Maybe I could turn into my 1 sec signal in 10 sec signal with 10 recopies and assemblage of my previous signal?
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Hello,
The first thing you have to do is to read the Chapter 7 of the user manual of the Sound and Vibration Toolset.
You can find it in : program -> National Instruments -> LabVIEW Sound and Vibration Toolset -> User Manual
This chapter discusses fractional-octave analysis, including fractional-octave analysis theory, averaging modes supported by the
Octave Analysis VIs, settling time, and ANSI and IEC standards.
regards,
Marc L.
NIF

NI-4552 w/2 FFTs and 2 Analog channels?

I am trying to use the DSA library with VB6 to capture two FFTs (channels 0 and 1) while still capturing raw audio on channels 2 and 3. Is this possible? If so, can someone clarify the steps to do this, or point me toward one of the examples that shows something like this? Thank you for any input.

It is possible for NIDSA to return 2 FFT's (ACH0 and ACH1) and 2 Time domain data (ACH2 and ACH3).
I would first like to make sure you are using NIDSA 1.2 - Could you please confirm you're using this version of NIDSA ?
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http://digital.ni.com/manuals.nsf/websearch/032430F78301D4A986256AC7004DFC52?OpenDocument&node=132100_US
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I attach an example in C that describes the basic steps to use NIDSA.
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I hope this will help !
Gerald Albertini
Attachments:
4552_4_Chan.c ‏15 KB

Method

I am new in the java world. I have a problem trying to get my little program work. I wrote a code to get the range of some values as
public int getRange() {
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kwesi

I wrote a program to find the average, maximum, and the minimum, variance and the standrd deviation values of an array of integers. This worked perfectly. I want to extend this program to find the range, mode, and the skewness but the program couldn't compile this time. theis how I wrote the code for the range and the skewness:
public int getRange() {
int range = 0;
for (int i = 0; i < iArray.length; i++;) {
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I wrote the same for finding the skewness = (average - mode)/ stddev
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Questions about the frequency response step

Hi,
I am using Signal Express 3.0. I am not clear about the transfer functions in the frequency response step with different averaging modes. What I got from the help file is that H(f)=Sab(f)/Saa(f) which is cross spectrum over auto spectrum where a is the stimulus signal and b is the response signal. When RMS averaging is used, I am wondering whether the transfer function becomes magnitude of cross spectrum divided by magnitude of auto spectrum. When vector averaging is used, everthing is in complex numbers.Is it doing averaging of the time-domain signals, frequency domain signals or the results from transfer functions?
Thanks a lot.
Ningyu Zhao
Solved!
Go to Solution.

The algorithm to calculate the spectrum is the same in both modes. However, the averaging mode can have a huge effect on the result. RMS averaging is done on the spectrum itself, after the calculation. Vector averaging is done on the input signals before the calculation. With vector averaging, the signals must be coherent (have the same phase) or the result will be wrong due to the signal being averaged away.
This account is no longer active. Contact ShadesOfGray for current posts and information.

Modifying Tektronix 2230 Driver

Hi,
I am working on interfacing a Tektronix 2232 Scope. I have downloaded the driver from http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E96C2659CE034080020E748... and have made a few minor changes. What I would like to be able to do is using average mode, take upwards of 70 sweeps to average in one run. To do so, I am using an optical chopper as the external trigger. Once commenced, the program will stop at an arbitrary number of sweeps (say 25ish), stop, then save to the program (I can never reach the desired number of sweeps). I've tried with a different range of frequencies on the chopper, but regardless of this, the program seems to 'time out' after 10 seconds. I've tried finding the problem, but I can't seem to get it... Any help would be much appreciated.
Thanks,
Cam

Cam,
It would be helpful to know what settings you are using for each input. Are you using the Tek223x Example.vi? If you open the block diagram and turn on context help (Ctrl+H), there is a lot of documentation on how to interface with the instrument. It would probably benefit you to go over this documentation to make sure that both the instrument, and the program have the correct settings, as it explicitly states in the help that this instrument is difficult to interface with. ("We found the Tektronix 2230 digital storage oscilloscope somewhat difficult to operate over the GPIB.")
Good Luck!
Drew T.
NIC AE Specialist

Acquire mode average Oscilloscope Agilent DSO-X-2002A

Hi. I’m trying to use the Oscilloscope Agilent DSO-X-2002A with the LabVIEW 2009. My problem it’s about read a waveform for a channel, when I had configured the acquire mode on average. I.E. When I use the example code “Read Waveforms (Single).vi” located in the public data directory of the “Agilent 2000 3000 X-Series” I read the waveforms when the acquire mode is normal (the example code could plot the waveform), but when it’s on average, I don’t obtain anything (the example code couldn't plot the waveform). Maybe there is something that I’m not considering, could you advise me?

Hello,
if you're interested in LabVEW, you should better post related questions in the LabVIEW forum here, this one is focused on LabWindows/CVI

Acquire mode average Oscilloscope Agilent DSO-X-2002A

Hi. I’m trying to use the Oscilloscope Agilent DSO-X-2002A with the LabVIEW 2009. My problem it’s about read a waveform for a channel, when I had configured the acquire mode on average. I.E. When I use the example code “Read Waveforms (Single).vi” located in the public data directory of the “Agilent 2000 3000 X-Series” I read the waveforms when the acquire mode is normal (the example code could plot the waveform), but when it’s on average, I don’t obtain anything (the example code couldn't plot the waveform). Maybe there is something that I’m not considering, could you advise me?

Hello,
Does the Vi return some error message after executing? What channel settings are you using on the example?
Have a nice Day!
Felipe Flores
Engenharia de Aplicações
National Instruments Brasil

IMAQ Resample performance. Any better choice for 50% downsample? (average 2x2 - 1 pixel)

My video source is a 4 Mpixel (2k x 2k resolution) USB3 camera. This is displaying a live image OK in Labview at 45 fps using only 20% CPU. So far, so good.
I added a "IMAQ Resample" block to downsize this to 1024 x 1024 image. That works with almost no additional processing time if I select "Zero Order" interpolation (eg. plain subsample to value of nearest pixel). However, I want to average each 2x2 block (4 pixels) in the input image into 1 output pixel. I *think* that is the effect of selecting Bi-Linear interpolation. Doing that works, but takes about 45% of CPU. I want to do some other processing but am worried I will quickly run out of CPU time and start dropping frames.
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Hi jbeale1,
In NI-MAX (Measurement & Automation Explorer) select your camera. Under the 'Acquistion Attributes' tab do you see an option to change the Video Mode of your camera to a different resolution? If your camera supports it, it would be more efficient to change the resolution there.
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http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_resample/
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My ipod touch 2g a1288 wont restore. The download takes ages then ipod puts itself back in2 DISABLED mode, HELP!!

Ok so my ipod is making me really angry. If I don't figure this thing out today after trying for so long I think I'm going to take my car and repeatedly run the thing over until its in a million pieces.
Right now heres the long story which ill try keep kinda short but I do need to explain whats happened thus far
Ipod touch (2G), Mondel: A1288 which has gone into disabled mode and is basically useless at the moment.
Now I've done the thing where you hold the two buttons while plugged into laptop until itunes detects ipod in recovery mode. Then I try to hit restore, this starts up the download/ update thing which will not download because here in the dark ages of New Zealand our internet is slow. So because its so slow the ipod touch takes itself back into disabled mode! ahhhhhhhhhhhhh so FRUSTRATING
Now I'm aware that I can pre-download the firmware (which will still probably take ages but may save the ipod from timing out and going back into disabled screen) and then just hit control and select it when ipod is detected in recovery mode by itunes. The only thing wrong with doing this however, is when I go to the site to get the firmware from http://http://www.felixbruns.de/iPod/firmware/ and look in the drop down menu of 2G ipod touches, I don't see my model listed there so I'm wondering what firmware I can download for the A1288? Is it compatible with a different version? because it wasn't even listed in the drop-down menu of ipod touches.
I just wan't the thing going again! they put these things into technology that make it useless because they know the average joe like me will just give up trying to fix it and buy a new one. Well not this time, if I cant fix this, I'm going to run the thing over and that will be that!
Many thanks for reading my speal, I hope somebody can help

lol yea when i inserted the link i just copied and pasted thats why that happend... Lets try again... http://www.felixbruns.de/iPod/firmware/
Anyways when I go to it theres a drop-down list and you select the one you want and I know the number next to it identifies the model but the thing is they don't have my model listed so my main question is, what version eg. 2.1.1. or 2.2.1 etc. etc. etc. etc. will work with my model of ipod touch which is the 2g Model A1288?
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Average mode DSOX2002A

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