Detect a noisy signal

Similar Questions

• detection of crest of a noisy signal in offline mode

  LabView dear experts...!

  I'm trying to find the vertices in my Signal in offline mode. I would like to know the amplitude, location of the summits and manipulate. But the signal noise and if I try to feed them in this signal to a ridge detector it gives results falsely as taking small noise spikes. I want to get the great peaks (3 peaks in the data).

  Please help me to detect these peaks.

  When I used a detector.vi of the art for a simulated noise less data works very well. I'm using LabVIEW 7.1.

  Waiting for your response.

  This will give you maximum values without filtering. You get both with a bit more coding.

  

• Media Center cannot detect the CBS signal

  When I connect my antenna directly to the TV, I pick up CBS (channel 19-1) live without any problems, but no matter what I do or I place the antenna, when I connect the antenna to my dvr PC, Windows Media Center does not detect any signal of CBS and the intensity of the signal never changes.  All others, the stations/channels are, even those from Akron, who are believed to have weak signals.  I tried to add a new channel 19-1 with the frequency provided online, but WMC will not let me create another channel to 19-1, indicating the number of the channel is already in use even when the original channel is deselected. I have a friend in the region, which also runs a PC dvr and he says that he can not get CBS via WMC or another.

  Any ideas?

  PS. The PC dvr currently has Windows Vista, but I intend to upgrade to Windows 7 in the near future.

  Hello

  I suggest you post this question in the community of Experts Windows for
  Windows Media Center.
  http://experts.Windows.com/FRMS/windows_entertainment_and_connected_home/default.aspx

• Monitor x 2511 HP: HP x 2511 monitor detects the HDMI signal

  My HP x 2511 now has a problem in that it does not detect HDMI.  It is able to detect VGA, however.  It is likely is a hardware problem in the monitor?  It of something I should get it fixed or is - this monitor a lost cause?

  I bought this monitor with my computer of the microcenter office system in Paterson, New Jersey in early 2013.

  Hello @mouton89,

  Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the Forums of HP, I would like to draw your attention to the Guide of the Forums HP first time here? Learn how to publish and more.

  I read your post on how display of your desktop computer does not detect a connection of HDMI cable, and I'd be happy to help you in this case!

  I provided you with a few steps, you can try below:

  Step 1. Unplug the power cord at the back of the screen and the wall
  Step 2. Press and hold the power button for at least a minute
  Step 3. Plug the power cable in the monitor, and then to the wall outlet
  Step 4. Press the Menu button on the monitor
  Step 5. Navigate to the factory reset option and select
  Step 6. Try a different cable to connect your monitor to your computer

  If the steps above did not resolve your issue, you can try the monitor on a computer or other device to see if the problem persists. If the monitor is still not able to detect another device connected with HDMI cable, please contact our technical support for further assistance in this matter by clicking on the link below to get help from your region number.

  www.HP.com/contacthp/

  I hope this helps!

  Concerning

• Acquisition of time between peaks (noisy signal)

  Hello Experts,

  I'm new to labview and I worked on a VI on the acquisition of the duration between 2 peaks (real time). The source of the signal is human ECG/EKG (cardiac signal - PQRS). He has a huge spike and other smaller in each beat in torque, and the signal is disturbed. Now, what I try to do is just to get the duration between these peaks in real time (so it changes every time or it could be the average of several peaks).

  If all goes well, I'm not confuse anyone of you.

  I have spent a lot of time trying, but can not really understand how to use some of the functions available.

  If possible, someone of you can show a simple example of how this could be done? (using sinosoid signal - noise - like source would be enough).

  crossing my fingers!

  Thank you in advance!

  
  

• No signal found by HDMI or DVI monitor. Monitor detects the VGA signal very well.

  That is the problem. I used to get a signal from the HDMI cable or the cable DVi on my old monitor.  Then, the signal was there sometimes, and then it isn't.  Now my new monitor does not have an HDMI or DVI signal.  He finds the signal to the VGA and that works.  Any ideas?  Myself and a few others have no idea on how to solve this problem >

  Hello, billiardsnut

  You use a DVI or HDMI adapter?

  Assuming you are using a straight DVI-> DVI or HDMI-> HDMI Cable, try to turn off the computer and turn off the monitor, connect the DV or HDMI, then turn them both.

  Some video cards will not dynamically change on its own, following the steps above will generally establish the proper output.

  In addition, since you mention on your old monitor that it is intermittent, it might be that the digital (DVI/HDMI) port on your graphics card is a failure.

  David
  Microsoft Answers Support Engineer
  Visit our Microsoft answers feedback Forum and let us know what you think.

• WRT110 Wireless - unable to detect the signal/connection.

  Recently lost connectivity to an existing wireless connection I had set up over the past months.  The two XP laptop with Dell Wireless WLAN Card and box of Wii is no longer connect or detect the signal.  Curiously, WiFi stood momentarily after the reset of power on the router but then disappeared. I connect well with connection wired and mobile detects all my neighbors SSID.  All the lights on the router are bed... but no wireless signal.  I even joined a wireless USB device to my desktop pc to test.  It detected all the SSID of the neighbors but not mine.  Even with the laptop.

  Troubleshooting steps I did:

  -Router-

  Power recycled.

  Held reset button.

  Linksys firmware to 1.0.5 update

  Configuration is modified to enable the SSID Broadcast

  -Laptop-

  Card driver WLAN Dell upgrade vA17 4.170.5 to 4.170.77.18 vA22

  People with disabilities Dell Wireless utility and enabled Windows Wireless configuration.  Either the Dell or Windows detected my wireless signal wireless utility.  Both will detect AND connect to the open connection of the neighbor.

  Appreciate any idea or other troubleshooting suggestions.

  Readjust the settings of your router wireless...

  Open an Internet Explorer browser on your computer (desktop) wired page. In the address bar type - 192.168.1.1 and press ENTER... Let the empty user name & password use admin lowercase...

  For wireless settings, follow these steps: -.
  Click on the Wireless tab
  -Here, select manual configuration... Wireless network mode must be mixed...
  -Provide a unique name in the name box of the wireless network (SSID) in order to differentiate your network from your network of neighbors...
  -Set the Standard - 20 MHz Radio band and change the Standard channel to 11-2, 462 GHz... Wireless SSID broadcast should be enabled and then click on save settings...
  Please take note of the name of the wireless network (SSID) because it's the network identifier...

  For wireless security: -.
  Click the sub-tab under wireless > Wireless Security...
  Change the mode of WEP wireless security, encryption must be 64-bit. Let the empty password, do not type in anything... Under type of WEP Key 1 in all 10 numbers please (numbers only and no mailbox for example: your 10-digit phone number) and click on save settings... Please note the 1 WEP key as it comes to the security key for the wireless network...

  Click the settings advanced wireless
  Change the interval of tag to 75 > change the Fragmentation threshold to 2304, change the RTS threshold to 2304 > click 'save settings '...
  Now let's see if you can locate your wireless network and try to connect...

• SingleToneInformation detect nearly 0 amplitude to 0 hz

  Hello

  I use the 4071 DMM AND measure some AC signals.  Sometimes I'm also trying to detect the absence of an alternating signal n (stable switch).  My automation is all c#, I find it acquire a waveform and dealing with SingleToneInformation much faster to just have the built in a measure.  By customizing the rates and the number of samples, I can reach 20 X faster measurements (and quite right too).  This works really well if there is actually a signal.  It doesn't work so well when I check the absence of a signal.  The class SignalToneInformation spits some garbage values (like really high voltages that my system could ever generate).   Sample data is fairly thin with typical background noise usually well below one. Millivolt | and no corresponding samples to not return the value (I got 500V return values when no sample was more than ±0.0009.  What I do to work around these bad values is simple process the sampleData for | pics |  (enter the Max AbsoluteValue).

  Two things:

  (1) class (Analysis.Enterprise) SingleToneInformation should do a better job handling a no signal condition.

  (2) in my test, I know when to wait for a missing signal, but there might be cases where I don't know and I want to measure.  If she were to measure a signal-no, I get garbage.  I should be able to have either SingleToneInformation give better values or an indication that he couldn't catch a tone with success.

  I'm testing a system that generates signals AC using a DAC.  I always test type single tone signals (usually a form any of a sine wave.)  I still have a lot of oversampling

  My software is up to date as of May 2, 2013 accoring to OR update.

  Thanks for your help!

  Hello JohnGardner58,

  Currently, the function extract a single signal does not notify when it cannot detect a sound signal. However, there are plans to implement these features in the future.

  Digital Multimeters to take a second to determine the frequency, as it must have some cycles a signal to measure with precision the frequency. However, this period is expected to decline during the measurement of higher frequencies.

  When I'm looking for rate data, I use the function extract a single signal. The Sound and Vibration Toolkit has other functions for the calculation of frequencies. However, all these functions will wait a frequency and no noise. I recommend the code to get rid of the noise of post-processing data.

• Library of TV on HPE-475uk detection

  I get the message unable to detect the tv signal please plug in the source antenna, the antenna is connected and works well when reconnected to the TV PC HPE-475uk using windows 7 64 bit

  How can I check the tv tuner card

  Advice please

  Located in the United Kingdom and no problems with the digital TV signal reception... PC is located in the same room the TV and TV to receive digital signals. When I unplug TV antenna and plug it into PC I get the message "cannot find all the channels please connect direct antenna.

  Hope this is clearer... Thank you

• Problem of noise with signal analog mV

  Hi all
  This is the first time I read an analog signal with LabView, so I'm sorry for the little knowledge I have.
  I'm reading an analog voltage between 20 mV and 200mV signal (proportional to temperature 1mV = 1 degree Celsius and given out by a thermometer) with a NI DAQ Device(NI USB 6009) (I have connected my signal to the Al0 + / entries). I use LabView to get the signal of the device of data acquisition. My problem is that my signal is very noisy. I get the noise on the scale of 10 mV. If I have this noisy signal on average more than 2 s, I get a smooth temperature without noise curve. My question is if there is something I can do to reduce this noise in the first place?
  I googled this problem widely but could not find me a solution.
  I'd be really grateful for the suggestions!
  Julia

  There are DAQ cards that have a lower battery life.  I try to get a DAQ with a range that makes sense for your measure.  If you measure a max 75mV signal, try to find a DAQ, which has a range of 100mV.  But that's just a rule of thumb.

  There are other possible tips to lower your noise level, depending on how your hardware is set up.  But that would take a lot of information to diagnose.

• FFT of a signal display

  Hello

  I have a noisy signal to process (Please find attached an image of the signal) and I would like to use the FFT function on my signal to remove noise and recover the clean signal using the inverse of the FFT.

  I have trouble when I use FFT because I don't have a single peak while I'm supposed to have a curve and the noise on higher frequencies.

  Thank you

  Take a look at the clip and see what I've added.  Change the window size will change the threshold for filtering.  I offset the result by one just to make it easier to see in the waveform graph.

• Which is the correct Point on the waveform of the Signal?

  Hello

  Please see attached image.

  I have labview software which is to measure the load of a load cell output. According to me, that the reading is accurate, except with the software Labview, we get up to 50 lbs less when we read it with the oscilloscope technician.

  What I see is that the technician measure the amplitude of the signal at the top and when there is little noise reading of the oscilloscope is even higher because the placement of the cursor is higher.

  I see that LabView is more or less because when we place the cursor oscilloscope in the middle of the measurement at the center of the signal signal not top it it reads then the same my labview program. I also have a low bypass filter in labview software.

  Which are the correct measure points waiting for oscilloscope to measure? in the picture as an attachment the white slider is positioned correctly, or is the correct red cursor?

  It's just an example of image zoom to see better.

  Thanks to you all.

  JCollado

  If I understand you correctly the width of the track to noculars represents 50 lbs of difference as? If you think about how works a noculars, then the center of the line displayed is probably the most accurate. The line width is determined by a few things, noise superimposed on the signal being a. So, with a noise filtering in your LabVIEW its 'width of the line"program will be closer / diluent, as it will have removed some of the noise component. Place the cursor in the middle of the path displayed in the noculars is an approximation of this, sort of looking for the point where the noise is "average" out 1/2 top / in-1/2 under the cursor, which is about the signal of 'data '. It is difficult to make measurements of accuracy of a noisy signal with a noculars for this reason, where do you put the trace? If you were to remove the filter program LP you would probably get the equivalent of the "wide trace flag" which would be a series of values that plotted close the underlying signal, but with high and low variations equivalent to the width of the track.

  So after all this verbiage, I would read the trace Center, perform an average of noise 'eyeball '.

• Can't do a TV picture on my HP 2006 Media edition by using my cable coaxial antenna, I split the signal out that works well with ordinary TV

  I am in a rural area of the United States and have an antenna connected to a digital box with a signal strength of 73% to my regular TV on which I get 16 channels.  The radio works fine in the Media center, but I can't get the TV stations.  I have divided the coaxial antenna power and connected it to the coaxial video on the back of the CPU.  I have a 64 x 2 dual core AMD Athlon {tm} processor 4200 +.   When I get to the media center TV auto configuration screen in place it scans and said then not detected no TV signal.  If I configure manually using antenna and then go to the screen "digital land" and hit next, the program stops working and although it shows it running in the Task Manager it will not give more. I guess that's because it detects no signal from the antenna.  I'm stumped and would apprectiate all opinion.  Finally, I would like to power TV live stream to my regular TV of the CPU, but going to cross this bridge after receiving a signal from TV to the CPU.

  Hello

  I suggest you according to the question in this forum and check if that helps:

  http://experts.Windows.com/f/

  It will be useful.

• Laptops do not detect the wireless network

  Only 1 of the 3 laptops detects my wireless signal.  I restarted the router, the modem, and other portable... no change.  The signal is strong on the computer, pick up the signal.  What's wrong?

  Hello

  I suggest to refer to this link and follow the instructions in the link below and check, if this can help:

  http://Windows.Microsoft.com/en-us/Windows/help/wireless-network-connection-problems-in-Windows

  It will be useful.

• WIFI stopped detecting networks

  I think it has to do something with the material.

  I opened my laptop (of Assembly) to clean the fan on my laptop because it was making weird noises.

  I assembled all the part and cleaned the fan and re - assembled.

  Everything went well but when I started to laptop, to my great surprise of wifi detected not all signals. My router is little far from my room.

  I took my laptop next to the router right. to my surprise, he detected network here. But, if I move a little bit away, then he used to detect anything.

  NOTE:

  There are a lot of networks is available in my building. They have all been detected by my wifi. Now, none of them are turning upwards in the list. Not even my own one, if I'm a little further. So I think that wifi range has decreased enormously.

  I seriously damaged something (material) inside my laptop or should do with any connection inside the laptop?

  What should I do? Should I re - open my laptop and reconnect all connections?

  Thank you in advance.

  as I suspected, I forgot to connect these two wires black & white adapter wifi.

  I have re open the laptop and connected computer. Now, it works fine.

  Thank you for your support. It really helped a lot.