intermittent signal received

Similar Questions

• Two synchronized USRPs receive the same sine wave emitted by an another USRP, there is a phase shift random and obvious between the signals received from the 2 receivers

  Hello world!

  First of all, I use a USRP as a transmitter to emit a sine wave (the signal is exp(j2*pi*f*t)), and then I use the external clock to synchronize the two USRPs (Ref as PPS in are connected to the clock) as receivers. Receivers are in sync, and they are at the same distance from the transmitter, I thought that the signal they receive should have a nearly the same phase. However, in practice, the phase shift is big enough, and this problem really confuses me.

  It's the received signals of 2 receivers.

  Yes. What you observe is expected.

  Near the bottof of this document read the area 'alignment Phase vs Phase coherence '.

  http://www.NI.com/white-paper/14311/en/

  And also, for the alignment phase, see the following 'Angle of arrival detection with NI USRP '.

  https://decibel.NI.com/content/docs/doc-25716

  Erik

• Intermittent video on Apple TV

  I have two ATV that is connected to the same A / V receiver.  In general, they work fine, except that each of them regularly produces a video signal that turns on and off every second or more.  The video signal, although intermittent, is clear (i.e. not blurry), the audio signal is normal and the units are also fully functional.  The ATV resetting sometimes works, but not always, and the problem does not necessarily occur on both devices at the same time (often a camera present the problem, while the other is normal).  When the units are functioning well, they continue to do so as long as the units are on, but sometimes return to the intermittent signal after I turn off and on.  For the life of me I can't understand why I would get a video signal intermittent/flashing like this and have seen no offer published in the forums of users about it.  Any thoughts?

  Have you checked all HDMI connections? Disconnect and reconnect both ends. Maybe try a new cable? Does rely on the program source, HBO, iTunes, YouTube, AirPlay, etc.. ?

• Startup menu appears intermittently and then turn off again several times. Cannot work all menu visible. What can I do to prevent it from happening?

  I'm not a computer Wizard so I hope to give you the correct details.

  The botton 'Start' on the left side is very used to activate the menu.  However, I am not pressing the windows key on my keyboard or by clicking the button on the screen with my mouse.  The problem is intermittent, but extremely frustrating, because when the menu pops up that I can not go on with my work.  By clicking the button on the left on the desk with my mouse can temporarily solve the problem, BUT the menu appears again a few seconds later.

  Sometimes when using any program or watching a dvd. Sometimes it stops for a while, but just at the point where I think that it has sorted itself, he returned.

  I ran Windows Defender and a registry cleaner - I'm about to try AVG anti virus.  If this does not work, I'll go out of my mind.

  I hope there is a simple solution to this... Help, please!

  I spoke with Neelabh Sinha Microsoft based in New Delhi.  Several minutes of trashing the problem, we discussed the possibility of RF interference with my Microsoft wireless keyboard or mouse as a signal low resistance warning came a few times.  I discovered that, even if I did not use the keyboard wireless at the time, he was placed in storage always batteries.  Unknown to me, a book had fallen against the keyboard.  Despite my my laptop in a downstairs room far away from the location of the keyboard, the receiver picked up stray signals from it.  I was using a mouse without a wire with the receiver close to your computer and laptop was tested almost all the signal received from the keyboard.  However, some of the signal got through and are in conflict with the orders that I was typing on the laptop.  Standard keyboard strokes became orders of service and it is these conflicts which were manifested on the screen.

  Thus, in the future, when you use don't not my wireless keyboard, I'll make sure that the batteries are taken to avoid a recurrence of my problem!

  I appreciate the time taken by the Member of the community who responded to my question.  I'm embarrassed that the cause was so stupid and banal, and yet he had such a profound effect.

  Just to say that the keyboard and mouse Set wireless Microsoft performed more than adequately. Perhaps too well...!  Top marks to Microsoft to make such a competent piece of kit that works even when separated by walls, a spread of two-story between transmitter and receiver.

  All points must go to miss who thought that "outside the box" to identify the likely cause of my problem.  Respect!

• Is it possible to predict the shape of the signal at position B by the measure in a position?

  Hi, I need to know the shape of signal and position phases B, but I have only a single antenna to a position, which is of the form 1 m B. The signal is a source far away.   I think that it is possible to predicte it.

  Like this: first transformation the signal received at A time in the field of fourier-domain, then caculation phase changes of the components of frequency between A and B. After that turn it into time domain, it should be the series of signals to frequency B.

  I simulation Matlab process, but it seems that he has a problem. What is the problem with this method? Are there methods to achieve this coming? Any response will be appreciaged.

  If your antennae are in free space so that you can assume that you have not all paths multiple problems, so it shouldn't be too difficult to predict the relative phase between A and B.

  You should know the angle between the line from A to B and the B line to the source.  You need to know the wavelength.  You need to do a few trigonometry.  In the simple case where all three are collinear phase shift is 2 * pi * (spacing of A - B) / wavelength. For the other angles, you will need to calculate the appropriate triangle.

  If the signal has a complex modulation, especially if it signals a wideband, there may not be any simple way or simple to calculate the phase shift.

  Lynn

• calculation of the SNR/CRADLE to the real-time signal

  Hello everyone,

  I need to calculate SNR or BER of the signal received in real time. I use USRP 2920.

  Hey IrfanRazzaq,

  You may be better to post this question in the USRP forum:

  http://forums.NI.com/T5/USRP-software-radio/BD-p/500

  I also want to point you to these forum posts that deal with this issue:

  http://forums.NI.com/T5/USRP-software-radio/example-VI-for-calculating-ber-of-the-USRP/m-p/3048995

  http://forums.NI.com/T5/USRP-software-radio/USRP-for-bit-error-rate-measurements-using-packet-based-...

  There is also a VI in the modulation called MT toolkit calculate BER that takes a signal and a desired profile and returns the BER

• A sim card don't reach my phone signal

  Wife and I both have a 380 Acer phones on contract with Three.Since about 7 days my wife's phone cannot receive a signal in our House but mine did. We arranged with acer for its phone back for repairs.

  Today because she uses her phone more than I do, I inserted sim card in my phone, to my surprise no signal is received with his sim card in my phone. If a sim card can affect the signal received by the voiceless?

  Sometimes, I would contact 3 to get a new SIM card.

• Connect the signal in the C++ QML?

  Hello

  Sorry in advance for this noobish question

  My QML, I'd like to call C++ function to call the camera and then on the saved photo, I would like to save the url for further processing.

  The invocation and the seizure of the URL does not work correctly.

  The problem is that I can't send a signal of C++ to QML to send the url to QML for further processing.

  Trigger from QML:
  
  Button {
     text: "Snapshot"
     onClicked: {
      app.invokeCamera();
     }
  }
  
  void App::invokeCamera() {
      InvokeRequest request;
      request.setTarget("sys.camera.card");
      request.setAction("bb.action.CAPTURE");
      QByteArray data;
      data.append("full");
      request.setData(getShareRecipeData());
      mInvokeManager->invoke(request);
  }
  
  void App::childCardDone(
          const bb::system::CardDoneMessage &doneMessage) {
      QString url = "";
      qDebug() << "childCardDone reason:" << doneMessage.reason();
      qDebug() << "childCardDone data:" << doneMessage.data();
  
      if (doneMessage.reason().compare("save") == 0) {
          url = "file://" + doneMessage.data();
      } else if (doneMessage.reason().compare("save") == 0) {
          showError(doneMessage.data());
      }
  // This doesn't seem to send to QML
      emit cameraCaptureCompleted(url);
  }
  
  In C++:
  
  signals:
      void cameraCaptureCompleted(const QString &url);
  

  QML to signal received (somehow this must be duplicated?)

  signal cameraCaptureCompleted (string imageLink)
  onCameraCaptureCompleted: {}
  Console.Debug ("link to the image:" + imageLink);

  }

  The onCameraCaptureCompleted never triggered. The console.debug ("link to the image:" + imageLink); did not show anything.

  Thanks for your help!

  OK, I went back and looked at your provided code again and I see you try to put your location of onCameraCaptureCompleted on the Page, which certainly won't work, since the Page is not the class that has the cameraCaptureCompleted signal. I suggest one of these three approaches:

  Page {   id: myPage
     attachedObjects: [
        App {
           id: myApp
           onCameraCaptureCompleted: {
              // ---Do your stuff
           }
        }
     }
  }
  

  ... or if you prefer the Manager to appear on the page do this way:

  Page {
     id: myPage
     attachedObjects: [
        App {
           id: myApp
        }
     }
     function cameraCaptureCompletedHandler( imageLink ) {
        // ---Do your stuff
     }
     onCreationCompleted: {
        myApp.cameraCaptureCompleted.connect(myPage.cameraCaptureCompletedHandler);
     }
  }
  

  If you don't want to mess with connect() you could do the last example that much too:

  Page {
     id: myPage
     attachedObjects: [
        App {
           id: myApp
           onCameraCaptureCompleted: {
              myPage.cameraCaptureCompletedHandler( imageLink );
           }
        }
     }
     function cameraCaptureCompletedHandler( imageLink ) {
        // ---Do your stuff
     }
  }
  

  Of course, all these examples assume that you have successfully exposed the App class to QML with qmlRegisterType(). The signal you want to respond to being on the App class, you must place your location, or connect the App::cameraCaptureCompleted signal to your location explicitly.

  Hope it is clearer to you now.

• Tecra A2 - mouse problems

  I have some problems with the external mouse on my tecra A2. The pointer seem to 'jump', sometimes across the screen, and it's pretty boring. I'm not sure of what the cause of the problem and still less what to do about it... The mouse is a Logitech optical mouse. I tried to change to a similar mouse but that did not help...
  What should I do?

  Hello

  Try disabling the touchpad through FN + F9. Did you try it with mouse just wireless? You can try it with the mouse that is connected with a cable?

  Sometimes I have the same problem, but it happens if the batteries are empty or if the mouse signal receiver is placed on the wrong place.

• No Surround sound on 37RV633D

  Hi @ all,

  I ve you have a problem with the background music on my 37RV633D.

  This is my setup:
  * [Playstation 3] * = HDMI = * [TV] * = optical cable = * [APR] *.

  But my APR receives only STEREO instead of sound 5.1. The same problem occurs when I connect to my laptop or a satellite receiver to my TV via HDMI.

  If the optical cable is directly connected PS3 to AVR, there is no problem...

  Is there a solution to pass trough the sound 5.1 from devices via HDMI and optical cable to the APR?

  Greetings

  > If the optical cable is directly connected PS3 to AVR, there is no problem...
  So why you n t use this medium connection.

  That sound you have watch a TV with the internal TV Receiver?
  The TV should be able to provide the 5.1 via optical cable of the AVR

  But to my knowledge most TVs cannot take the 5.1 with HDMI audio signal and send it using the optical output.
  Especially the 5.1 signal received via HDMI would change in stereo so that the TV could audio output via own stereo speakers.

  Therefore, always connect the playback device to APR

• Satellite M30-704: band bandwidth hoggin?

  Hi This is my first post so go easy on me.

  I have a satellite m30 704 currently under xp sp2 and my problem is that I share a wireless network with two other computers, another laptop manufacturing running xp sp2 & a mac from apple OSX.

  The router is a netgear DG834GT.

  They are all connected via wifi & it seems to be my laptop creating the problem monopolizing the bandwidth?

  If I'm on the net at the same time as other portable computer manufacture it is not a problem at all, but if I'm on the net at the same time as the imac it takes literally 5 minutes to load a page on the imac.

  It happens also that as soon as I pass on the other computer laptop manufacturing & I am connected regardless of the fact that I'm not really surf the net?

  But if the XP laptop & the imac are both online at the same time there is no problem at all.

  I'm completely baffed to that I have absolutely no idea why this is happening, I even contacted netgear & they suggested upgrading the firware & reconfigure the router, done cela & still no luck so please can someone help me before I'm left with no option but also to buy a new laptop like the imac user is my brother who is a freelance graphic designer so that it uses his imac for work, hes, threatening to disconnect me!

  Thank you

  Hello

  A question: why you have connected two units machine to Windows XP and MAC to the internet if you only work with one at the same time?
  Disable the connection on Windows XP computer laptop for work with MAC and everything will be ok ;)

  I don't know why the Internet is slowly on other units while the Satellite M30 704 was connected to the WLan router. Maybe a part 3 application is running in the background and the bandwidth with both hands

  What card WiFi has been installed on the M30?
  It supports a 802.11 B or 802. 11A / B WLan standards?
  Maybe the map of the M30 WiFi signal has a bad influence on the correctly WLan signal received on the iMAC that knows

• iPad, storage

  I have a 2 32 GB iPad running iOS 9.2. For the past few weeks I have my store available has reduced greatsly and I get the message "storage is full. I have deleted a large number of applications that I did not use, but shows always only 196 MB and memory used as 26.7 GB of available storage. In fact, I added the amount of space used by each application and it's only for a total of up to 6,5 GB! Would be very grateful for help in resolving this issue because I'm unable to download anything (I can still update the iOS version).

  In addition, the wi - fi signal received by the iPad is very week, although my iPhone or my laptop will receive greater power of the signal in the same area. And my iPad has a tendency to "freeze" sometimes. I think that these two problems can be linked to the issue of storage.

  How music, movies, photos, books electronic or eMagazines do you have on your iPad 2?

  Something is using all your storage space.

  In the application settings, under the General settings panel, in the right window, tap the storage and Panel use iCloud.

  Under the category superior storage, tap on the option of storage management.

  This will take a little time that iOS generates a list of all the applications that your iPad has installed on it and what these applications take upwards for storage on your iPad.

• How to install Satellite A300 Infared remote?

  How to put in place the Toshiba Satellite A300 infrared remote control?

  I got a universal remote/infrared apple should work with all... but how to enable and configure the remote device from Toshiba?
  I can not even find the place to activate infrared on my laptop.

  Are you sure that what you're saying?

  > I got a universal remote/infrared apple should work with all
  Please don't be crazy about me, but you should take it too literally. This all should have the infrared signal receiver (IR port). Please use s operating manuals and check if that port is available on your Satellite A300.

  Following the logic of Apple it should also work with Ferro too. ;)

• HP G053US 17: WLAN has become very sensitive, hardware ID is not driver provided by HP

  I bought a new laptop, HP17 G053US of Office Depot. It came with Win8 installed OEM.

  It worked very well, no problems with the use of the wireless card. I can't quantify the intensity of the signal received, other than to say it was 3 to 5 bars, identical to a cell adjacent.

  Since then, I have reinstalled Win8.1 Pro x 64. The WLAN now detects more no signal of any wireless routers/modems. Zero to five bars (while the portable computer side still shows 3 of 5).

  I loaded the drivers in the sequence of the BIOS, chipset, then WLAN. Nothing helps.

  It comes from the source , I got the drivers from.

  WLAN HP's driver information:

  Wireless 802.11b/g/n Realtek RTL8723BE/RTL8188EE LAN drivers

  Version: 2023.5.130.2015 Rev.A

  Information about drivers in Device Manager:

  Broadcom 802.11n network adapter

  Driver provider: Microsoft

  Driver date: 31/05/2013

  Driver version: 6.30.223.102

  When you view the info driver through the Device Manager, it seems strange that the driver that I downloaded from HP was Realtek, yet the displayed info was Broadcom and Microsoft. So, I checked the hardware ID of the WLAN and verified that it is indeed a Broadcom device.

  ID of material as follows:

  PCI/VEN_14E4 & DEV_4365 & SUBSYS_804A103C & REV_01

  PCI/VEN_14E4 & DEV_4365 & SUBSYS_804A103C

  PCI/VEN_14E4 & DEV_4365 & CC_028000

  PCI/VEN_14E4 & DEV_4365 & CC_0280

  I searched HP and Broadcom, but so far have not been able to find a driver that will support this material in combination with Win8.1 x 64. If there is such a driver, please let me know how I can get it.

  If not, can you suggest anything else I can do to increase the sensitivity of this device? Perhaps some adjustments following it has advanced options of the Device Manager? And any idea when will be released a pilot easier to apply?

  Thank you

  Hello:

  The hardware ID, is what you have to go to identify the exact model of the wireless card.

  It's a brand new model of wireless card Broadcom, and it would be the pilot W8.1 you need to do this.

  http://h20564.www2.HP.com/hpsc/SWD/public/detail?sp4ts.Oid=6943827&swItemId=ob_142187_1&swEnvOid=4158

  You also need the bluetooth driver for this model of the wireless card.

  http://h20564.www2.HP.com/hpsc/SWD/public/detail?sp4ts.Oid=6943827&swItemId=ob_146703_1&swEnvOid=4158

• Time Division Multiplexing (TDM) Using USRP s 2943 with synchronization

  Hello

  I have two 2943R USRP.  One of them is transmitter another is the receiver. I wonder about the moment on USRPs division multiplexing. How could I implement this system? On the first slot of the Trasmitter USRP channel 0 will send the signal, receive USRP channel 0 will get the signal, on the second time slice Trasmitter USRP 1 channel it will send the signal, receive USRP channel 0 will receive the signal again. This process will goes in the order. So in detail, Ch0 of USRP0 will send the first niche hourly Ch0 of USRP1 will receive, Ch1 of USRP0 will send, Ch0 of USRP1 will receive again after the third slot Ch0 of USRP0 will send the signal. This process will be contiue until I stop VI. Signals will be displayed on the receiving party and release will signal where USRP0 Ch0 and Ch1 USRP0.   Example of synchronization is present on examples of NI Labview 2014 USRP on PPS trig. But I could not find example vi or a document on the TDM with synchronization.  You give me advice? How could I overcome this problem?

  Best regards...

  Hello again,

  I found an example on the community or my research: https://decibel.ni.com/content/docs/DOC-23677

  Can I use this paper for my purpose? Is this useful? Could you give me advice please?

  I don't have much experience on 2943R. I am trying to learn... How could I change this document for my research?

  Best regards...