Adjacent channel power ratio

Hello

I'll try to find measures PTA of the OFDM signal with 3 MHz of bandwidth using block ACP in the kit to SMT tools. But I'm out like NaN. Why is it so? Can someone tell me please?

And I use NI SMU-5645R Transceiver.

Thanks in advance!

Looks like you can get the ACP SMT block NaN whenever steps out towards negative infinity. The way that the acquisition has been set up, I think that you receive an error on the fetch call, which returns an empty array of waveform, which adopted the ACP bloc. Which can lead to a negative infinite result. I have attached a modified project that works on my VST.

Here's what I changed. First of all, I don't have a map of timing and synchronization, so I had to use scripts and a marker event to synchronize the generator and Analyzer. You can replace that with your overall software trigger code. Second, I made the acquisition changes I mentioned above: finite number of samples, endless documents, connected to the PXI trigger trigger 0 reference.

Finally (and I don't know if this is necessary), I replaced your QI to spectrum VI with the SMT. the Spectra parameters are then passed to the ACP VI VI range.

To do my VI properly, you will need to fit you your waveform. I used the script mode to synchronize the generator and parser which means that I had to use mode instead of the mode of power peak power average. Once you add your rear synchronization code, you can switch to the mode of the ARB and average power mode.

Tags: NI Products

Similar Questions

  • Measure Adjacent Channel Power Ratio

    Hey, I have a question. I just took "Measure Adjacent Channel Power Ratio" exercise on ni.com, but it seems that I need "Sexercise"and "1-3 ACP" folder to find the IQ WCDMA waveform . Can I do this without it? If not, could someone send me this Wave IQ WCDMA or tell me where I can find it?

    Thank you

    Hi GhostCole,

    Please visit this link for the complete reference for 'Introduction to the RF on PXI systems.

    https://decibel.NI.com/content/docs/doc-34734

    See this link for the files you need for the ACP.

    https://www.dropbox.com/sh/1717ht7wfo615xs/uUVWD7o9wn

    Kind regards

    James

  • 6008 USB channel power for specific times

    Hello

    I am new to Labview, so I don't know if it's easy or hard to do.

    I have an attached VI who writes exits Digital 12-channel.

    What I´d wants to be able to write each channel for a specified time (avoiding the is fine - it doesn´t have to be super accurate, but he needs to turn off automatically after a certain time).

    For example:

    When I click, channel 1, I want him to be for 1 second, then turn automatically cut and wait for the next command.

    When I click, channel 2, I want it turn on for 0.5 seconds, before turning automatically turn off and wait for the next command.

    When I click, channel 3, I want him to be for 5 seconds, then turn automatically cut and wait for the next command.

    etc.

    So when I click Run, I could click on channel 1, wait a few seconds, channel 1 still once, wait a minute, then channel 3, wait 10 minutes, then channel 2, etc, in any order.

    Is how easy it to do? Is this possible?

    Thanks in advance for any advice.

    Jon

    Hi Jon,

    If you want to set the time separately, my guess is it would be easier for you to create the channels separately. It's more manual work, but I think it's better to come up with an algorithm of time-supervision to all channels at once.

    To trigger the output, I think that it is better to share entries, then perhaps it would be good to get out them of the matrix as well.

    In a loop, you can check the value of the button and then just write 1 to the port, wait for the timeout with time delay vi, then wrtie 0 again.

    If you create tasks separately and do not merge error, the process for each channel will work in parallel, so a delay will not affect the actions of the other channel.

    Kind regards

    Mariana.

  • We cannot draw power ratio cli for single user of VDI which is a member of VDI several groups in Active Directory?

    Hi all

    Is it possible to identify single user VDI which is a member of VDI several groups in Active Directory from power Cli script

    Thank you

    VM2014

    Oops, my mistake. Try this

    Get-ADUser-filter *-MemberOf properties |

    where {$m = $_.} MemberOf | where {$_-match 'app-view'}; $m - not $null - and @($m). {Count - gt 1} |

    Select the Name,@{N='#VDI groups; {E = {$m.Count}}.

    @{N = 'Groups of VDI'; E = {($m | Get-ad group | Select name - ExpandProperty) - join ' | '}}

  • Calculation of signal to noise ratio

    Hello.

    I was wondering if it was possible to calculate the SNR of a signal with LabView? I use a DAQ hardware and an accelometer to measure a force.

    Is that being said, possible to calculate SNR by looking at the graph of spectrum or vague? When there is no g on the accelerometer, there is a signal with a little noise... and I can see that in the spectrum of frequecny all the way to the cut-off frequency. What is the background noise?

    I'd appreciate any help!

    Thank you!!

    Abraham_E,

    Thanks for the data.  Curiously, the data do not seem to care what language you were using when you got it.

    The first data column appears as timing information.  The dt in who is 0.0005, which corresponds to a frequency of 2 kHz.  You said 400 Hz in one of your messages.  The discussion at the point 2 below corresponds to a frequency of 2 kHz sampling.

    1. you are right that SINAD is not very useful. SINAD assumes that all the power of the signal is the dominant frequency component that is not quite true for ECG.

    2. the size of the FFT of the signal shows the dominant signals at 50 and 100 Hz which is likely to be able to line with frequency. Al here also erase lines 200 and 250 Hz. You certainly do not want to calculate SNR under the assumption that the desired signal is 50 Hz.  The SINAD VI calculates the fundamental frequency than 49,97 Hz.

    3. If you don't know the 50 Hz and harmonic components, there is no obvious lines in the spectrum remaining. I interpret this means you have the significant variation of heart rate data.  This means that the heart rate is modulated in frequency. Frequency modulation broadens the spectrum.

    4. because there is not predominant in the spectrum, it is unlikely that frequency domain techniques will be worth any in the determination of the SNR.

    So, what can you do? Looking at the data graphic, I think a peak signal to noise power ratio could be significant. There are little noise, even at spikes, if it has a few problems too.  I have divided the data set in 1 second segments. For heart rate in these data, each segment contains one or two beats.  In each segment, I found the maximum and minimum values.  I set the value from Ridge to Ridge for the segment of the difference. I also calculated the RMS value for the entire segment. Then the SNR is the signal from Ridge to Ridge divided by the RMS value. It is probably more accurate to use the RMS value of the QRS and exclude parts QRS of the RMS of noise, but to do both is algorithmically and by the much more difficult calculation. It would be also better force segments contain exactly one beat of each. Again, it is much more complicated.  I then calculated the average of the SNR segment values and call it mean SNR.

    As I pointed out, there are some problems with the definition (peak to peak/RMS).  If you just want to compare signals within your lab to see which improves things, this should be good.  If you want to publish data and compare to other published results, you have to find how they define and measure SNR.

    In the attached VI I read the file once and recorded values in an array as a default value. Then I removed the file played screws and just worked with the data. To try this with other data simply insert read VI file in the appropriate place.

    Lynn

  • Can I wireless use a 430 EX II as a slave with the flash integrated the T3i EOS?

    I have a Rebel EOS T3i.  According to its manual, pp 191 ff, I can launch a remote speedlite wireless from the camera.  I get an error message cannot find the speedlite even if I set up my 430 EX II speedlite according to its instructions manual, pp25 ff.  Thanks for your help

    Yes - the 430EX II will function as a slave and the T3i (but not the T2i or earlier) can trigger remotely the speedlite.

    It of a little complicated and can be confusing.

    First... set the 430EX II in the correct mode.  Press and HOLD the 'Zoom' button for 2 seconds approximately.  This active a menu that allows you to put the flash is in a mode single-fash vs remote "slave".  Semicircular keys to switch to read 'slave '.  Press 'set' (in the middle of these buttons of a semicircle shape.)  I happen to have my 430EX II practical, but it must default to the slave 'A' channel '1 '.

    Now for the camera.

    On your camera menu, tab to the left (which we'll call 'Caméra Red #1' to distinguish it from other tabs) has 'Flash' control as the last option on this screen.  Either way for cameras with a built-in popup flash, the menu is marked 'Flash Control'.  For devices that do NOT have the built-in pop-up flash, this menu is called "Flash speedlite external control.

    In this submenu (Flash control), make sure "Flash of fire" (the top option) is set to 'Enable' or 'CustWireless' - should NOT be set to 'disable' or nothing will work.

    You will see a menu choice for "external Flash func. parameter' (and also 'External flash C.Fn setting'.)  IGNORE THESE!  This is for the hot flashes that are in the camera hotshoe and do NOT control the remote flashes wireless.  This is probably where you were getting confused.

    Then go to "built-in flash func. the parameters' where, paradoxically, you get to control how your device communicates with your flash REMOTE (Yes, I know that this is not the most intuitive place to put it.)  It turns out that it is your INTERNAL flash that is responsible for communicating with any flash slave remote.  The optical wireless actually uses visible light (many people assume that it is a communication infrared - me is understood - at the end of the day, I learned that was incorrect and it's actually the visible light of the flash itself.)  He quickly sends communication to remote control by pulse codes to tell flash what to do remotely.  All this happens until the image is exposed and you'd swear the only blinked once eyes flash... but it turns out that it is actually very busy away from the impulse to connect).

    In the "func flash built-in. menu of settings"there are a number of things that you must set.

    If you set the flash mode built in 'EasyWireless' it will be gray on many other parameters... basically the camera automatically decides what he wants to do.  I think that the only definition not gray is the channel number (which must match the channel number on your flash.  Channel numbers helps you can draw on events where other photographers are also using wireless flash and have no conflicts where they are triggering your flashes and vice versa.

    If you set the flash mode built in "CustWireless" it allows you to set other options.  CustWireless offers the most control.  In the end, it's probably mode you will use the most, once you get used to distance Speedlites.

    In CustWireless, the menu option 'Wireless' Func mode. becomes available.  This option allows you to decide if you want (I take these out of use for simplicity to explain):

    (a) speedlites both internal and external to the fire as a single group (icon external flash, a PLUS sign (+) and the camera icon)

    (b) the Speedlite flashes inside and outside to the fire, but allowing you to control the power RATIO (icon external flash, a COLON symbol ( and the camera icon means "ratios" can be customized.))

    (c) only external Speedlites (only the external flash icon is on this option - no icon on the device).

    I want to mention something about this external option only because it confuses most people initially.  The device communicates with the slave through the on-camera flash.  The flash on the camera quickly pulses to send the instructions for flashes to distance.  This means that to use the slave flashes, the on-camera flash must be addressed (in jumps - upward position).  If you ask for external flash only (without camera) the flash on the camera flashed only instructions BEFORE the opening of the shutter of the camera to take the exhibition.  When I started to learn from external Speedlite flashes, I saw the light on-camera flash and thought that my settings were ignored.  Do not worry... When you archive your images, you will see that there is no light provided by the on-camera flash during exposure... all this flashing comes before the opening of the shutter.   Everything happens so fast that you'd swear all the flashes triggered only once... but in reality they are actually much of 'talk' before taking the picture, but this happens at an incredible speed.

    And one last comment... because the camera communicates through Optics (visible light) flash to talk to remote controls, it is important from the bottom of the body of your 430EX II can 'see' the flash on the camera.  In small parts, that no matter where the lower part of the body showed up... you notice the impulses of the light of the on-camera flash.  But in large halls or outside the lower body of your 430EX II (where the receiver is located) will have any reflection of the walls, etc.  In this case, simply turn the lower part of the body of the 430EX II so that it faces the on-camera flash.  You can then rotate the head of the 430EX II at the point where you need.  The 430EX II will trigger even in daylight, as long as it can 'see' as the on-camera flash.

    Here is a video that can help you: http://www.youtube.com/watch?v=pQIyPWGPp5A

  • Agilent N9320B IP3

    My goal is to get the IP3 of a N9320B Spectrum Analyzer data. I think the closest to get there is through the VI which provides third order intermodulation. I tried to change the example for the acquisition of a measure to measure the Intermodulation of third order rather than channel power... but it doesn't work. I am getting error-420 not COMPLETED query. Also I get error - 113 sometimes "header missing."

    The photo of the diagram beside this message. If I take just the part that says 'reading (third-order Intermodulation) measure' then it works perfectly well... While doing nothing. Does anyone have advice?

    I thought about it. The pilots claimed to be the most recent version, but they used VISA commands that were not correct. I found the manual of the programmer for the N9320B and found that I had to change:

    : ETF: YOU: IP3?;

    : ETF: YOU?

    TO

    : FETCh: TOIntercept:IP3?;

    : FETCh: TOIntercept:IP3?;

    While it's great that it's working now... it was like spending hours trying to adapt a LEGO House together and then, you discover that some of your LEGOs were a millimeter shorter than the others. You didn't do anything wrong, someone gave you the wrong parts. Are Labview instrument drivers open source? Who is responsible for making sure that they work properly?

    I really like the Labview software. She is neat... but at the same time I learned today.

    This feels like the first time I tried Linux when it took me 3 hours to install GNUradio.

  • generation of carrier multi using vector signal generators OR

    Dear all,

    I have a client who asked me about the capacity of the vector signal generators OR to generate signals porters multi, and if yes, what will be the minimum displacement between adjacent channels? There already buy a complete RF PXI system of NEITHER and I need to support as soon as possible

    also, if I can work on the 2.7 GHz or 6.6 GHz to test GSM and CDMA2000 1 X RTT units?

    can someone help me in this please

    I'm in a hurry!

    Mohammed,

    Since VSGs of NOR are all software based, you can generate practically any signal you want, as long as it is within the bandwidth and dynamic range of the instrument. The SMU-5672 generator has a bandwidth 20 MHz, and the SMU-5673 real-time has 100 MHz of bandwidth of generation. You can create your MULTIPORTEUSE waveform in software and set the way you want.

    Each platform is able to test GSM and CDMA2k. I would recommend the platform 6.6 GHz for test times improved if it is for the production. Implementation of the Protocol can be a challenge, however. If you have a great opportunity cell phone, you should get in touch with your field sales engineer OR to see if EITHER can provide any help.

  • Relationship between the samples through the second rate and sampling

    I was wondering if someone could clarify the relationship between the samples through second rate and sampling.

    I have USB6008 and USB6363 of the tips that I work with in Measurement Studio.

    For the nec USB6008 entry differential (up to four channels of HAVE), if I put a sampling frequency to 8192 samples per second, and I updated 2048 samples per channel with:

    Task.Timing.ConfigureSampleClock ("", 8192, SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples, 2048)

    Am I right in assuming that:

    • through the 4 analog inputs 8192 samples will be collected every second
    • 2048 samples will be taken by way of analog input for each scan
    • The time between two successive data points is 1/2048 seconds (about 0.5 ms)

    Hi DKIMZEY,

    The help page for the "Timing.ConfigureSampleClock method" should have a hypertext link to the page "Sample clock" in NOR-DAQmx help, that contains this text: "this sample clock sets the interval of time between samples. Each tick of the clock starts the acquisition or the generation of one sample per channel. "When the sample clock frequency is 8192, then the time between two successive data for a single channel is 1/8192 seconds. The time between the data points on two adjacent channels is controlled by the clock to convert, which can be controlled independently on most devices (up to a point).

    Brad

  • SEARCH in a table, delete

    I have this table.

    I want to remove random noise.

    but I don't know where to start.

    I think I can remove row3 equal = 0.

    How can I do this?

    I want it to look like this

    Now that's a different problem.

    The file data you posted is not all zeros inside. The maximum and minimum temperature data are 51.1 and 12.9.

    I found the minimum and maximum for each column and then calculated the ratio. "Quiet" channels have ratios ~1.04 while the channels and large increases in temperature have > 1.7 reports there are also a few channels with little noise (such as channel 60 in your picture) with the rations between these values. Maybe you could use the max/min ratio to determine what are the desired channels.

    Lynn

  • WRT54GL: Fast cable internet connection; very slow wireless

    I have been chasing a problem for months and I am at the end of my mind.

    I started with a cable modem Motorola SB5101 and Buffalo bison wrt-hp-g54.  For years, we had a (intermittent) desperately slow wireless connectivity.  Recently I started to run through Speakeasy.NET speed tests to try to find a motive.

    Wire speed is consistently running 15-16 Mbit/s, compatible with the speed promised our cable package.

    Wireless speeds were a different matter.  From multiple computers, they would sometimes as soon as the wire speed; then all of a sudden (from all wireless computers) the speed would fall to 0.5 Mbit/s or less, then the speed measured on our single wired computer remained at 15 Mbps.

    Restart the router would mitigate the problem for a while, and then the wireless would fall up to 0.5 Mbps.

    Wire speed would remain stable at the nominal 15 Mbit/s.

    Well, looked like a bad router.  I replaced it with a WRT54GL hardware version 1.1.  I've updated the firmware to the last - v4.30.16.

    I selected a channel (2) wireless network what inSSIDer 3 watch is not used by any neighboring router (i.e., no interference).  I have that checked regularly and am sure that interference is not the problem.  The router is configured for the wireless G only; WPA - AES.

    The same problem occurs with the new Linksys router.

    In desperation I replaced the old modem SB5101 with a new SB6141 cable, not believing there could be everything possible that could help but, this what the devil - we will eliminate it as a factor as possible and go to DOCSIS 2.0 to DOCSIS 3.0.

    The problem persists.

    Thus, new router, cable modem brand new, constant wire-speed, without strong signals wireless, channel interference all around. but the problem persists. There has been no improvement on the old hardware I used.

    All computers, but a (XP Pro) is running Windows 7 Pro.

    The problem is not predictable, except that the speed degradation will happen sooner or later - and this is not progressive.  Suddenly, he fell like a stone and sticks to 0.4 to 0.5 Mbits/sec.  Reboot the router (usually) will fix it for a while, and sometimes it will clear up on its own, given enough time.

    I ran inSSIDer several times while this is happening, but he sees no other no signal on the channel I use--in fact, none on adjacent channels either.

    I checked from wireless to the router table and there is no other than our device, so it does not appear that the network has been hacked.

    Does anyone have an idea what might be going on or suggest an action plan?

    The only thing I can think is that there is something between the router and the computers wireless in the House which is eating up 95% of the bandwidth wireless - a sort of voting out of control.  But what?  I'm completely stuck.

    Follow-up.  I changed the channel 1 wireless; After doing some research I realized that sharing a channel (as long as your signal is at least 20 dB louder) causes fewer conflicts overlapping channels.  I have not changed anything else.  I'm tempted to allow the break-up of the frame but implementation of that seems to be somewhat specific to the supplier so I'll let it be.  In any event the wireless speed now as fast as the wire speed.

    The result is that since the re - install the Linksys firmware and do a hard reset that I saw not a single instance of the speed problem.  So I still don't know exactly what caused in the first place, but I'm glad that the problem has disappeared, so I'll just let things be.

    Thank you!

  • XPS 13 wifi another problem

    works great when near new TrendNet AC1900, one of the most robust routers.  Take my second floor office and wifi PC is unusable.  Bounces and goes out several times per minute on 2.5 and 5 GHz.  changed the channel, power mode, aggressive homelessness and updated the driver.

    What is my next step?  Of course it is an important issue and needs resolution soon.

    Spending some time with a Dell technical support who has diagnosed the problem is a known issue with 10 Windowe. He has updated my BIOS and driver associated with networking.  The fix stabilised to my WiFi on 2.5 GHz network. It is a marked improvement.   The intensity of the signal is always lower than other materials, but at least I can use my machine now.

  • Adjustment of the regulatory field of wlc and APs

    We have 5 APs is currently working on the regulatory field C. We add 5 APs more and a WLC who came in another regulatory area as directed by my boss, he said, it's H.

    Will there be problems operating in 2 different areas?

    What can I do to make each APs and controller in the same domain?

    Help, please.

    Hello

    Refer to this document for more details on the regulatory areas

    http://www.Cisco.com/c/en/us/products/collateral/wireless/access-points/product_data_sheet0900aecd80537b6a.html

    What country deploy you this AP, I hope it's in China (according to the doc, above). As long as the country code is set to WLC, you should be fine.

    Will there be issues operating in 2 different domains?
    If you configure two different country codes belong to two different regulatory domains (like Europe & America), then available channel & power limited to a lower common level. In your case, I don't think that you configure countries in conflict on your WLCs. HTH Rasika * Pls note all useful responses *.
  • Problems of network with 715W

    For months (seems like years?) I had to power cycle regularly my printer, the PC and the modem/router to restore network connectivity.  More recently (now) connectivity is dead, even until I can't connect using a USB cable.  If I try to print a page of test via a USB port, it goes through the motions, pulling a page from the paper tray, abruptly resets and get the blank page on the output tray.  I tried without success with several resets of the router, different channels, power levels, etc.

    Anyubody other similar problems?  Of course, I had also just replace my black and purchased 2 new black cartridge and a color cartridge to avoid missing (victimized by this one at Christmas while they were not in stock!)

    After spending over an hour on the phone with Dell, call of the Canada, getting bounced to half a dozen different representatives in the United States and then back to the Canada even once, he ended it would cost more than a little troubleshooting only so buy a new printer (not DELL).  I managed to get a RA number to be able to return the cartridges, that I just bought.

    Then I called my provider I had problems last week with my network which I think might be related.  After about 15 minutes with them, they found where a framework had been modified caused place ended my problems.  Even if they are not 'officially' supporting printers, he worked through the configuration with me and you have my printer works again 100%.

  • multi channels data acquisition, a single frequency, counter a pulse, two voltage inputs, a power meter (by USB) and an analog output spontaneous and recording

    Hello

    I have a power meter which provide the USB driver and a Labview program to get the data and NI USB-6221. The project I am currently working on the needs of:

    1 acquire two signals (inputs of simple tension), pressure frequency KHz

    2. acquire a flow signal, the output signal is 0 to 5V pulse, each pulse means 0.4 ml volume. So I use a voltage inflows to count impulses in certain period of time (in this case, 1 S) for water flow. ; KHz sampling frequency and the 1 Hz update rate

    3. acquire a signal of engine speed. The output signal is pulse square wave whose frequency is related to the speed. I use a REIT port to measure the frequency. Sampling rate: Auto

    4 give output voltage sine or square wave, I use AO do that.output rate: Auto

    5 acquiring by VISA electricity meter data.  Data update rate: every 50ms

    Currently, all the 5 tasks work well separately. But when I put them together, some signals are beginning to hang, for example, pressure signals sometimes give nothing.

    Another problem is the data record. I programmed the VI in such a way that whenever I press the button 'save start', he begins to record data and save them in a .cvs file. For some reason, I always get only the data in the first table. Coult someone help me? I download my code as follows

    Hello

    What I meant by open, write, close.  For any type of file you are using.

    Open the file, which produces a reference, then put the mention in a registry to offset.

    Write data, using the function write (for this type of file) and the reference.

    When you are finished, close the file reference.

    Writing in the spreadsheet opens, written, close all at once.  It is very good for this type of application.

    ***

    The issue of the loop is more general.  I would like to say first of all, I want to say that since each loop works on its own, it is own VI, and that this program has put all this into a single VI, which has a method to solve the problem is to disable all the loops and allow them one at a time to see if there is a culprit responsible for.

    Using multiple loops executes the code at the same time, and some loops would be cycle faster than others, especially if some of them are loops just as they are.

    Communication between the loops is a test to the address if necessary.

    Running all these signals through different loops DAQ must also be examined.  Don't know what questions are for read and write somewhat randomly in the channels.

Maybe you are looking for

  • I have paid and registered for converterhelper, but had to restart firefox, how do I get it back?

    I had to restart firefox due to ben salah toolobar. Reinstalled downloader helper but can't find where to download converterhelper without paying again for her. I got my registration code. I have windows 7 Home Edition. Any help would be appreciated.

  • Skype crashes Windows 10

    So I got this computer and I downloaded Skype for about 1.5 months it worked on windows 10 then one day the Skype comes to the accident I tried to reinstall Skype and turn off the pc and it won't work it opens for about 10-20 seconds then does not an

  • help me with this error code 80070005 Code...

    help me with this error code 80070005 Code...my windows is not updated for a few days...Please help me...

  • Double HP5550 print

    We have recently updated again iMac here at the office. We currently have some printing problems with the HP5550 that we have put in place on the network. Whenever the iMacs print only one sheet, it prints two copies. If anyone knows or has had this

  • L7680 JO is no longer on the network

    I have a L7680 all-in-One, since this model is released - I think about 10 years.  It's a great printer.  Suddenly, he "fell off" my network, and I can't put it back on. I use a wired Linksys Cisco network and the printer must receive its IP from the