Hardware for portable DAQ using microphones

I need a very portable, laptop based DAQ system for making acoustic measurements, including recording waveforms from microphones. I'm looking at the DAQPAD-6015 w/ BNC termination (# 779193-01 costing $1,495). Is that all I need? Do I need any other accesories?

Hello Acoustics-guy,
If your transducers connect through BNC, than I can't think of any other accessories you need. However, if you need signal conditioning for your measurements you might need to consider some other options or extra accessories. Take a look at the SCXI 1600. It is not as portable, but it may provide a more robust measurement system by allowing you to use the SCXI Signal Conditioning modules. Let us know if you have any other questions!
Eric
DE For Life!

Similar Messages

Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)?

Hi all,
Can we demodulate the signal recieved at DAQ card without using any hardware interface(by only using labview)? if yes then how? please give brief idea.
Regards,
Amit

There is probably a way to do it, but it it may be easier to use an X-series board for the job. They support a new counter capability for count reset on a digital edge without needing to be configured in encoder position mode. I am not sure exactly how that feature's been implemented however, so maybe it won't make things easier after all.
The plan based on the hoped-for behavior:
1. Configure an X-series counter for pulse generation based on "ticks" of your clock channel.
2. Set both initial delay and low time to the critical # of ticks.
3. Configure for count reset on a digital edge (if possible in pulse generation mode)
4. Configure the count reset value to be the critical # (or possibly 1 less, if possible in pulse generation mode)
5. If you want the output to remain high indefinitely, configure the counter task to use its own output as a
pause trigger, and pause while high.
The way pulse generation works is to preload a # of "low time" ticks into the count register. Then every source edge will decrement the count. When the count reaches terminal count (0), the counter's output is toggled (or can be configured to pulse). The register is then loaded with the # of "high time" ticks and the process continues.
You would be perpetually interrupting the count-down process as long as you got your triggers in time. The count would keep getting reset to the # of low counts, keep decrementing toward 0 without reaching it, and so on. If ever you did reach 0, the output state would toggle high, then the high state would prevent subsequent clock signals from decrementing the count.
You can conceivably do a similar thing with a 6601, but I'm pretty sure you'd need 2 counters working together to get it working.
-Kevin P

Please send the algorithm and project code for temperature sensing using daq usbdux fast if possible code also for general text gui icon programming.

I have a daq card usb dux fast and I'm using linux zenwalk,
so please if any one has done a program on daq using comedi language or any language or any other related to it.
please send me the code and algorithm for it.
if possible a algorithm and code for general gui text icon programming to [email protected]
thanking you,

Hi Vinay,
you know you're posting in a LabVIEW forum?
When you have questions on Comedi you should post in a Comedi-related forum!
Or read some papers/manuals like this, easily found by Google...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Standalone application for data acquisition using NI DAQ card

I have made a standalone application in labview GUI for data acquisition and signal processing. if i have to run this application in any other computer what all softwares should be installed other than labview runtime engine...NI DEVICE DRIVER CD alone is to be installed or do i have to install any other software for data acquisition using NI daq card??
thanks and regards
Solved!
Go to Solution.

You should only need the run time engine, The device drivers for the device, maybe need VISA drivers if you are doing serial or something of that nature, You may need the channels or tasks created in NI measurements and automation if you created them there.
There may be other things that you will need depending on what you include in your code and what tool kits that you have installed.
Tim
Johnson Controls
Holland Michigan

Need to use quadrature encoder to trigger (RTSI) single point DAQ on 2 channels of E-Series DAQ, using 6602 NI-TIO for counting encoder pulses.

This is for LV6i, W2000, all PCI equipment.
Using a quadrature-measure position-VI, I get 7200 edges/rev from the encoder of my physical system. This equates to 0.05 degrees of angular displacement. This amounts to an angle stamp as opposed to a time stamp.
I need each of these 7200 edges (source: 6602 NI-TIO) to trigger (using RTSI) the acquisition of a single sample from each of 2 channels on an E-Series DAQ board (maybe more channels later). I only need/want one rev (7200 samples per channel) of data for each run of the test. As I write this I think I want pre-triggering and a little more than a rev of data. So the
re is a buffering step. Anyway, you can get the idea.
I need this angle stamp and the DAQ samples to be placed in an array and on the hard drive for graphing and other mathematical treatment, analysis, etc.
I think there must be a way to use the quadrature output of the counter/timer as a scan clock for the DAQ board, but I haven't seen an example to guide me.
It seems like all of the RTSI or other triggering examples I have seen trigger once to start a continuous scan, not a series of discrete samples repeated quickly. I am not sure how to fill an array with this data. Again, examples are for continuous sampling, not a series of discrete readings.
Any hints on any part of this task will greatly appreciated. This is my first LV project.

Sounds like a fairly ambitious first project!
I assume your 7200 edges/rev come from an encoder with 2 channels in quadrature which each provide 1800 cycles/rev. You can clock in analog data at 1800 scans/rev with either of the two encoder channels, but will probably need an external quadrature decoder circuit to produce 7200 scans/rev. Either method can be done with screwdriver and wire or else by using another counter from the 6602 and the RTSI bus. Here are two approaches in detail, but you could mix-and-match as needed.
Note also that if you can be sure that your reference encoder will be uni-directional, you wouldn't need to measure position -- position could be determined by the array index of the analog scan data. This would simplify things greatly.
1800 scans/rev, screwdriver & wire
Wire both encoder channels to your 6602 breakout box and configure your counter for the 4x quadrature option. Send a wire from one of the encoder channel connections at your 6602 breakout box to a PFI pin at your E-series board breakout box. Config the analog acquisition to use an external scan clock and specify the correct PFI pin -- there are built-in examples that will guide you. Now one edge of one encoder channel acts as a scan clock for your analog acquisition. Inside the 6602 breakout box, route the same signal to one of the default gate pins and configure your encoder counter gate to use that pin as its gate signal. Note that there will be a race condition governing whether the encoder value updates from the encoder inputs before or after the value is latched by the gate.
7200 scans/rev, extra counter & RTSI
Make sure you have a RTSI connector between your two acquisition boards inside your PC. Build a quadrature decoder circuit that will convert your two encoder channels into a clock and direction output. (Consider the LSI 7084 decoder chip or similar). Setup your "encoder" counter for buffered position measurement. Use "Counter Set Attribute" to define "up down" as "digital" (don't use it to define "encoder type"). The clock output goes to the counter SOURCE and the direction output goes to the counter UP_DOWN pin.
Use "Adjacent Counters.vi" to identify the counter considered adjacent to your encoder counter. Configure it for "retriggerable pulse generation". Use "Counter Gate (NI-TIO).vi" to specify "other counter source" as the gating signal. Configure the output pulse specs to be short duration (make sure total of delay + pulse width is less than the minimum period of the incoming encoder clock signals). Use "Route Signal.vi" to send this counter's output onto the RTSI bus, say RTSI 0.
Now configure the analog acq. to use RTSI 0 as its external scan clock. Also configure the encoder counter to use RTSI 0 as its gate signal. Voila! Now your quadrature decoder clock output acts as a scan clock for analog acquisition and a "gate" to buffer your encoder measurement. The short delay helps ensure that the clock updates the position measurement before the gate fires to latch the value.
Respond if you need clearer explanation. There's a fair amount of decent info "out there" if you scour the online help and this website. Good luck!

Possibilities of using Labview for executable DAQ software, PIC programming, etc

We have multiply issues here. We need to create a data logging and real time viewer for a custom Dynamometer build in which we need to bring in approx 12 sensor inputs through a DAQ card and plot their performance in a software package in house. This would likely not need to be wrote as an executable but would be nice for future expansion of business model. This system would need to operated in closed loop where sensor data inputs will relate to a programmed output. In a nutshell, we want to create automatic load sweeps for engines where we need to monitor rpm and such while outputting control to a load valve.
In another application, we need to create very simple executable software systems to edit variables wrote to a PIC. I am hoping that Labview has the ability to output and program as needed as well as create the software in an executable for our customers to use with our products.
We have a good friend running LV 8 so really only plugged around with it a bit but would likely use their seat in the short term for our DAQ and programming software needs. That is of course if it can do all of that. I would also like to askhow intuitive this program is? I am rather concerned I will need another degree just to run it. Learning Catia was NOT an over night deal. I am hoping the learning curve for LV is better...

asdfs,
LabVIEW is certainly capable of doing what you are trying to do -- acquiring, processing and outputting data is what LabVIEW was created for.
With regards to how easy LabVIEW is to learn it really depends on your background and knowledge. If you've never programmed before the learning curve is obviously longer since you have to not only learn the LabVIEW tool, but also how to think in computer programming terms. I would say that you can become productive with LabVIEW much faster than with other programming languages.
If you're already familiar with basic programming (things like loops, arrays and boolean logic) then LabVIEW will be much quicker to pick up.
Feel free to get in touch with someone from NI directly -- they can help you figure out if LabVIEW will be right for your needs technically and be able to meet your expectations with regards to how much effort you will need to put in. If learning LabVIEW isn't for you they can also recommend people in your area with the appropriate expertise if getting someone else to the work is an option for you.
Contact NI
You might also attend a free LabVIEW Hands On session given by your local field engineer - this would give you chance to get your hands on LabVIEW, go through some intro exercises and ask questions to an experienced user. After 3 hours you'll know if LabVIEW will be right for your application.
Check for seminars in your area
Regards,
SimonH

How do I configure my hardware for timing operations?

I'm using a 6020E with an SCB-68 and I would like to know how and where to plug into the SCB in order to drive a valve with a signal generated by the Generate Pulse-Train VI. I am pretty much lost when the manual talks about TRIG's, CONVERT*'s, gates, etc... so it is not of any use to me. Can I get some help? I just need to know how to configure the counter, and what port I should plug into to have the correct device receive the generated pulses. Thanks!

Greetings,
When using an example, such as the Generate Pulse Train (DAQ-STC).vi, the best place to go for running instructions and signal connections is the Documentation found by going to File -> VI Properties and pulling down the menu to Documentation.
You will most likely be using the board's internal timebase and, as such, do not need to connect anything to the counter's SOURCE pin. You will find that you can optionally gate the pulse generation. If you just want to simply generate a continuous pulse train and not stop or pause it until the user clicks the Stop button, then all you need to do is open this VI, enter the device number for your DAQ card, specify the counter you will be using (0 or 1), and enter your desired frequency and duty cycle.
The pulse will be generated on the specified counter's OUT pin. A connection from the OUT pin to your external hardware is the only physical connection you should have to make.
To find out the pin number for the OUT pin you will have to look up the cable-pinout for your specific DAQ card. This pinout is in the User's Manual. I believe you misquoted your hardware since we don't make a PCI-6020E. Therefore, I cannot double-check the pins for you.
Regards,
Justin Britten
Applications Engineer
National Instruments

A quad B signal as trigger for analog daq trigger

Hi everyone,
I'm trying to use an A quad B signal to trigger my daq device to acquire current input.
The system information is: 32-bit Win XP, NI PCI-6236 counter card. The A quad B signal is generated by a hardware circuit simulator to work as the output of optical linear scale which is not installed yet.
All I want to do is collecting a current data at certain positions, like 20nm, 40nm, 60nm.... (for example, I use X1 coding, a period of A channel is 20 nm) so that I can plot out the current signal as a function of position. I specified the trigger as uprising.
I'm confused by the mechanism of "Sample Clock" and "Trigger" because they are both physically implemented by the A quad B signal. Am I right? So how to specify the sample mode and sample rate according to the trigger?
I attached the vi here and I can not get any chart plot out. I appreciate that if anyone could give me some hints on it.
Thanks,
Kang
Attachments:
use external A quad B singal as daq trigger.vi ‏57 KB

Hi Kang,
It seems that the circuit that you have generates a digital signal; I would suggest you to use this signal as your clock for the analog input.
You can find an example related to this if you open your NI Example Finder and go to: Hardware Input and Output » DAQmx » Analog Measurements » Voltage » Cont Acq&Graph Voltage-Ext Clk.vi
You’ll need to wire your digital signal to one of the PFI lines of your device.
Regards,
steve.bm
AE | NI

Considering dumping my iMac for a PC used for DSLR video editing on Premiere CS6. Help!

So I edit mostly 1080p DSLR footage taken from my canon T3i camera. I purchased a 2011 (the latest model) iMac a little over a year ago, upgraded the RAM to 12GB and it has worked reasonably well. I purchased the base model for $1200 which has a quad core i5 processor, 512mb of video ram, and a measly 500gb hard drive. The past couple of days I have come to the realization that I only use Adobe Programs for graphically intensive work (premiere, after effects, etc). I originally bought my iMac for final cut, but FCPX SUCKS and I switched to Premiere CS6 which works like a dream. Anyways, I'm a senior in high school and do lots of video editing (going to major in video production in college). I'm likely going to differ college for a year and continue my video production business (pretty informal) as well as video production internships at a couple companies (so don't suggest that I get a laptop for portability, not an issue). I just shot an entire wedding with 2 DSLR's and the footage takes up over 20% of my hard drive which is unacceptable. This is very troublesome for me and has been clogging up my computer considerably. I have realized it would make a lot of sense to sell my iMac and purchase a PC that's not only faster, but has much more space. I was ideally looking to sell my iMac for $1000, and from that get a better and faster PC setup for my video editing. $200 would be allocated for a 24" 1080p LED 5ms Asus monitor (from newegg) which would leave $800 remaining for the PC. Ideally it'd be nice to have a little cash left over. Some things that sound appealing to me are: an intel i7 quad core proccessor at least 3.0+ Ghz, 16 GB of ram (maybe 8 to start), 1 GB of video RAM (here is where I'm stuck, my Imac had a Radeon 512mb video card in it, but I've heard premiere runs especially well with nVidia CUDA cards? Don't really know too much about this stuff.) I have no idea what type of card to get, and if I would even see a performance upgrade from my iMac. For storage I'd like at least 2TB of space, should I get two seperate 1 TB drives? One for boot and software and another for video files? Anyways, I assume I can benefit from selling my 2011 i5 iMac to get a faster PC equivalent at a lower price since I mainly edit videos (which is pretty graphically intense) from an HD DSLR camera. I've noticed premiere rendering times on my mac are starting to get pretty slow these days. Ideally it'd be nice to buy a desktop (already assembled) maybe from HP for around $600 (not including the monitor). I'm not completely against building a PC from parts (since I know a friend who can do it for me) I just need help figuring out WHAT exactly it is that I need and would benefit from.

Buy a Desktop Video Editing PC
http://www.adkvideoediting.com/
-ADK Kudos http://forums.adobe.com/thread/877201
Build a Desktop Video Editing PC
-http://ppbm7.com/index.php/intro-part-1
-http://forums.adobe.com/thread/1098759
-http://forums.adobe.com/thread/878520?tstart=0
-http://forums.adobe.com/thread/815798
-http://www.shawnlam.ca/2012/premiere-pro-cs6-video-editing-computer-build/
-http://www.videoguys.com/Guide/E/Videoguys+DIY9+Its+Time+for+Sandy+Bridge+E/0xe9b142f408a2 b03ab88144a434e88de7.aspx

IMessage on my iPad doesn't work when my ipad is connected to wifi but it does work when it's connected to my phones portable hotspot using 3G. How can I make it work so it does work via my wifi?

Recently my iMessage has stopped working I don't know for what reason but when I'm connected to my home wifi I cannot sent messages as not delivered pops up in red with an exclamation mark. Other apps like Snapchat cannot be used however it does seem to work when I turn my phone into a portable hotspot using 3G and connect my iPad to it. Regarding my internet browser still works ( safari, chrome, google).How can I fix this problem so I can connect my iPad to my home wifi and having iMessage still work?

*CANT UPDATE

HT1338 I wonder if somebody can help me. I am not able to use my internet bank anymore, since Java launched their latest update (7.51). Appearently this one is not compatible with my hardware. I am using Mac OSX version 10.6.8, and Java version 17.0. Than

I wonder if somebody can help me. I am not able to use my internet bank anymore, since Java launched their latest update (7.51) a few days ago. Appearently this one is not compatible with my hardware. I am using Mac OSX version 10.6.8, and Java version 17.0, which seems to be the newest one for my op sys. Anybody know how I can solve this? In advance thank you!

Apple support article to enable Java 6.
Java 6 Enable

Best Practice for Portable Home Directories

What are the 'best practice' directories to sync for Portable Homes - at login and in the background. I want to make my user experience a little better than it is now.
Login and logout take about 2 minutes - even over ethernet 100Mb, and longer using Airport, and 'background' home directory syncing seems to always suck all of my network bandwidth - making apps like Safari unusable - even though I have barely changed anything in the folders I am syncing.
My personal home directory is 1.5Gb, and I keep my Music, Pictures and Movies on the network - as Apple suggest.

I generally recommend the following for the least impact on user experience:
1. Put your server and clients that will use mobile accounts and portable homes on a Gigabit Ethernet switch. It's a small price to pay for much more customer satisfaction.
2. Put more RAM in the server, especially if you're dealing with a few users with large homes or several users with moderately-sized (less than 1.0GB) ones. This will also let you employ server-side tracking (for 10.5 server).
3. Only sync and login/logout. Use Workgroup Manager to define all portable preferences. Choose to manage login/logout sync, and specify the items to sync; for the whole home, use "~". Omit things like ~/.Trash. Choose to manage the background sync, but remove all items from the "sync these items" list. Choose to manage the background sync interval by setting it to manual. This way, the user doesn't accidentally configure a background sync: we've told it to sync nothing only we say it can.
--Gerrit

Is there any limitation of firmware or hardware for QoS configuration (4400 controller & 1252 AP's)

Hi Experts,
Before proceeding for adding AP model 1131 and 1252 into my set-up , I need to know whether any limitation of firmware or hardware for QoS configuration in wireless set-up .
I have 4400 controller and 1130 & 1250 AP models.

Hi Vinod,
Since you have 4400 controllers, you can run upto WLC 7.0.x code. Refer this for more detail
http://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html
there is no specific limitation to 1131/1252 AP model as such, everything is WLC software dependent.
From later software 7.4.x,7.6.x,8.x, lots of improvement for QoS configuration & bandwidth control, but since your controller is old hardware, you cannot have those latest features.
here is a reference post on how QoS works in wireless environment
http://mrncciew.com/2012/11/28/understanding-wireless-qos-part-1/
HTH
Rasika
*** Pls rate all useful responses ****

How to implement for sap system use HADR

hi expert ，
       i am a newbie to sap basis， we have a requirement that do HA for our sap using HADR，i want know if there are some good sulotion for my scenario。
   our scenaro is we have two window 2008 sever host，one host has a sap system and we want the sap db2 database as a primary，and the other host also has a same the system which is restore from the previous sap system which we implement by system copy using database restore not migration。i want know as our secanrio could i achive SAP application HA by HADR，if we donu2018t have HA software like MSCS。whether we must manual monitor the primary sap   when it stop because any issue like hardware failed and then manual start the other sap system in the other host？
our two sap system have different sap profile beacause the hostname are different.
our aim is when one of our host can't use we can immediate start the other sap system in the other host, the less the change the better the solution .
is it possible?
thanx very much,
best regards.

hi paul ,
    thanx for your information，i have already read the inforamtion about sg247363 once-over and SAMP。 but unfortunately we have a different situation，we only have two windows servers and must installed windows server 2008 OS because some reasons。we also don't have have other host to install sap。as this situation，how could we implement HA beacuse we also don't have shared disk。the window server are isolation。
i also read some pdf which download from sdn ， in the book the HA is implemneted as the sap application has a separate host and has two host for DB2 database using HADR，the HA is rely the cluster software 。in this situation the sap application also need HA to avoid single point failure。
    as the limited i have said above， is it possible to do HA by MSCS ，can any body tell me if the MSCS is free to install in OS windows 2008？ if we can't use it free，have any other solution？in the worst ， we must manual monitor the application and when a sap application or database can't work ，we want to restart the other sap which in the other host，we need the database synchronization between two database which using HADR。is it possible ？if it do， whether there are some additional setup for sap application because the two sap application have different sap profile name（a sap is a system copy from the other by database restore）。
    any reply will be appreciated。

Important News For Those Who Use Hulu And Other Flash Video Websites.

Adobe will release the next update to the Adobe Flash software in the next few weeks and that update will bring better GPU video decoding acceleration for Windows if you have recent graphics hardware from ATI, Nvidia, or Intel. This update is VERY important for those who use laptops which have less powerful processors and hardware than desktops usually do. In order to take advantage of this update when it comes out, you MUST have the latest graphics cards drivers for your hardware. ATI, Nvidia, and Intel will all be releasing new drivers specifically for the updated Flash software so keep an eye on the respective websites for your graphics hardware maker. Of those companies, only Intel and Nvidia have drivers available for testing at the moment, but ATI is not far behind.

You may be able to disable Flash entirely and just use HTML 5 video codecs to view the videos this is faster but you may lose access to some videos such as ones that have mandatory advertisements.

Hardware for portable DAQ using microphone​s

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Hardware for portable DAQ using microphones