FM in Ni Elvis II

I am interesting in Frequency modulation in Function Generator, i want to adjust FM bandwidth, so how can i do to adjust the FM bandwidth.
please, help me

Assuming you are using the NI ELVIS software, the function generator palette should give access to all of the options available. See the link below to the ELVIS II manual to see the different AM and FM modulations options.
http://www.ni.com/pdf/manuals/374629c.pdf
Karl G.
Applications Engineer
ni.com/support

Similar Messages

Isit possible to have two Ni elvis writer in one Vi using the same device and using 2 different NI elvis?

Hi is it possible to have two writer in one Vi with one elvis and also use two different elvis on one Vi? I hope someone can or know the answer.

If memory serves me correctly, an NI Elvis board connects to a PCI card in a PC if you want 2 Elvis boards then you will need 2 PCI cards.
Certified LabVIEW Architect
Certified Professional Instructor

How do I use elvis to record data from a pasco rotary motion sensor

I want to use a pasco rotary motion sensor (a rotary encoder) with ELVIS to record angular velocity. I have a LabPro system which I could also interface. But I was hoping to keep the hardware less complicated by wiring the sensor directly to ELVIS. Does anyone have a sample .vi which would record sensor output?

Hi PCM,
Measuring the time between pulses can be a little complicated. You can have a look at this knowledge base to get an idea of how it can be accomplished. However, since the sensor's output is a stream of digital pulses you can use the counters in this card to get some information from the digital signal. You can use one of the counter’s inputs in the NI-ELVIS and get the frequency or period of the digital signal. One good point to get started is by looking at the counters examples built in LabVIEW, you can find them going to Help > Find Examples > Hardware Input and Output > DAQmx > Counter Measurements. I hope this is helpful.
Ana P
National Instruments
Applications Engineer

Variable power supply not working in virtual elvis

When i make a virtual elvis 3d schematic i cannot get any output from the variable power source, i have played with it alot and still no output. please help.

Thank you for your time to help me out,
I got it to work using the shift+P and shift+n hotkeys. A suggestion I have is to remove the shift restraint for the GUI interface P and N buttons that appear on the screen after you highlight variable power supply, as it is non-intuitive for a user to know you must hold shift then press GUI buttons as well. I suggest coding those visual buttons to alias SHIFT+P and SHIFT+N operations when you click on them for ease of user interface.

Problem in signal extraction from ELVIS using biomedical startup kit

hi,
i am using executable version of biomedical startup kit 3.0. i want to use ECG signal. the problem is that i am using ELVIS for signal extraction from biomedical kit. but when i connect it with ELVIS, connected osciloscope with channel A0 and A1, but it showed no signal on osciloscope. can anybody tell me what can be the reason for that???

Support for the Biomedical Toolkit is provided on our Biomedical User Group at www.ni.com/biomedusers
Visit the NI Biomedical User Group at:
www.ni.com/biomedusers

How to apply clock to a ADC from NI ELVIS II+ board

How to apply a clock to a ADC for ADC conversion from NI ELVIS II+.
The input signal to ADC for conversion is 50 Hz applied from the function generator, now how to apply a CLOCK to this ADC for working.
Please help....

Look at the spectrum analysis and Fourier transform VIs. They should be able to do this.
Lynn

Elvis: Is It possible to use the Function Generator and the Oscilloscope simultaneously?

Hi,
We are using the NI Elvis to output a function or a sine wave at a certain frequency and using the oscilloscope on the same board/elvis to read a modified signal. Is this possible? Can we use both the Function Generator and the oscilloscope at the same time? Please help. The oscilloscope would be reading signal from an accelerometer. Thank you in advance. We have no VI as we do not know which to use and if they are possible.

Hi,
There is no problem using the Function Generator and Oscilloscope
at the same time with NI ELVIS. Using the NI ELVIS soft front panels (Start
>> Programs >> National Instruments >> NI ELVIS 3.0 >>
NI ELVIS – see picture attached –‘NI ELVIS soft front panels.JPG’), you can choose
to open more than one instrument at a time. We do this by opening one
instrument, allowing it to begin, and then opening another. We can also program
in LabVIEW using more than one instrument at a time by placing down multiple
Express VI’s taken from the NI ELVIS pallet on the block diagram (see picture
attached – ‘ELVIS Express VI's (LabVIEW).JPG’). One note when doing this,
please see KB 41ODPHX1
for an example of how to program in parallel. If you do not wire the ‘stop’
terminal of the express VI’s, you will get the error described.
David L.
Systems Engineering
National Instruments
Attachments:
ELVIS Express VI's (LabVIEW).JPG ‏74 KB
NI ELVIS soft front panels.JPG ‏56 KB

What is the internal impedance of the NI ELVIS Function Generator?

Does anyone know the load impedance of the function generator? I'm wondering how much it may be tainting the results of Tau for my RC circuit. Thanks.

Impact -
With the NI ELVIS Function Generator, the output impedence is spec'ed
at 50 Ω guaranteed. You can find the block diagram from the
Function Generator on page A-6 and C-6 (Appendix C: Theory of
Operation) of the NI ELVIS User Manual.
NI Educational Laboratory Virtual Instrumentation Suite (NI ELVIS) User Manual - http://digital.ni.com/manuals.nsf/websearch/11E6BA4103D9ADD086257103005C97E0
Good luck with your application!
Mark Walters
Application Engineer

Happy Birthday Elvis Presley - what channel?

They are running all of the Elvis Presley movies today in honor of his birthday. Does
anyone know if it's being broadcast on a FiOS channel?
Thanks in advance!
Solved!
Go to Solution.

I called my local FiOS store and they told me TCM.
Wish they were showing King Creole!
http://www.elvis.com/news/detail.aspx?id=5875

Measure current and voltage in Elvis and labview

Hi! We're setting up a control system setup for class where we need to monitor the current and voltage that we are supplying/drawing from the ELVIS hardware within a LABVIEW setup. So far, we can accurately display voltage input and outputs from the AI and DAO terminals respectively. However, we can't seem to find a direct way measure current draw. I believe that we are supposed to be able to get DMM readings from the AI5 channel, but either we're not doing it correctly, or we still need to place a known resistance across it (which we cannot do, due to variable loads). Any advise please?
Cheers,
Gerald

Are you using Elvis I or II? From your post, I will assume it is Elvis I but please correct me if this is not the case. Page 38 of the manual shows that ACH5 is used for capacitor or diode measurements for the DMM. To measure current, use the connectors on the front of the Elvis unit and then route the current HI/LO on the protoboard to either the oscilloscope or an analog input channel. You can use the DMM Soft Front Panel to monitor current as well.
Message Edited by h_baker on 07-09-2009 04:54 PM
Regards,
h_baker
National Instruments
Applications Engineer
Digital Multimeter Resources

Output labview array to LED grid using DI/O on Elvis II??

I have been working on a project. I am attempting to use the DI/O on the ELvis II board to power an 10x6 LED grid similar
to the common-row cathode design here
http://www.appelsiini.net/2011/how-does-led-matrix-work
I have been attempting to generate block patterns using an array in labview, then somehow convert this array to show the block pattern on the grid. I was planning on using DI/O 0-5 to power the columns and DI/O 6-15 to power the rows. Is such a thing even possible? So far I have created a simple DAQ assistant to control the DI/O on the board and can control values that way. i was just interested in knowing if they can be controlled using a labview program.

Generate digital pulse from your D I/O to control the relay. With Digital High State, the mechanical arrangement will connect the COMM to "NO" .... and you will get your programmable Ground. (in your case NC is not necessary I hope)
The device is not so costly. you can purchase 4-5 number with your pocket money only. And It must be available to your nearby Electronics Shop. Use 1 for each line.
Attachments:
Relay.PNG ‏8 KB

NI Elvis Read Current and Voltage Simultaneously

Greetings,
I'm trying to read voltage and current on an NI Elvis II to characterize the output of a TENS unit (currently using SignalExpress).
What I have worked out:
Thanks to advice on another question I asked earlier today, I've now got the timing worked out so that I can produce log data at 10kHz when measuring voltage through the CH1 Scope input.
I'm now moving on to the other have, and am trying to add current in as another task. It makes sense to me to try and read that through the DMM current input. However, I'm getting errors that will only allow me to read the value once, instead of at the 10kHz rate I measure the voltage at (and would prefer that they are read in sync).
This seems like it should be pretty straightforward to do, but I'm just not seeing it. It's really important (in a non-academic and non-job way) that I get this done tonight, and I really appreciate all the support this board has offered. If there's anything I need to provide to make the issue clearer, please do not hesitate to post.!
Would it be easier to run this through LV proper instead of SignalExpress?

The DMM that is onboard the NI ELVIS II is not specced to run at the rates you're requesting. In fact, the DMM is a software timed device, which means that it will only collect samples when your computer tells it to. I created a quick benchmarking code to see how many measurements that an ELVIS II could take per second and I came up with about 4 or 5. You can recreate the code yourself to see similar results.
After one second, the elapsed time Express VI will output a 'true' which will stop the while loop. The DMM will be constantly acquiring and writing data into an array. When the while loop has finished, an array of DMM data will be output. The size of this array will indicate the number of samples that can be read in one second.
Nathan M.
Applications Engineer
National Instruments

Does anyone know how to use ELVIS in Labview to get current and voltage measurements?

Trying to use ELVIS in Labview to get measurements with a NI myDAQ.

I have changed from using the ELVISmx driver as I was unable to call on the digital multimeter of the myDAQ twice, I have set up a VI using the DAQ assistant with the myDAQ, I am using the AI0 port for a voltage reading and using the DMM for my current reading, the circuit is working as I am measuring the voltage on a resistor after the ammeter but I am unable to get a current reading in order for it to work. If I have something wired wrong please let me know, thank you. My circuit is a 12VAC power supply, going through a potentiometer to drop the voltage to 8VAC, which passes through a resistor, ammeter is in series after this and attached to another resistor to complete my loop, the AI0 for my volt meter is connected across the second resistor, I have the proper voltage reading when I run the VI, but am unable to get a current input. Thanks for the help.
Attachments:
Mikes Project2.vi ‏131 KB

Elvis with X11 support - PKGBUILD

Building the other 2 elvis PKGBUILDs in the AUR is broken, and they are without X11 support.
I'm wondering if I should submit this PKGBUILD, which compiles and works fine, and includes X11 and x86_64 support and the help documentation, to the AUR.
# Maintainer: Robert Kieffer <rek2w @ A L U M N I DOT V I R G I N I A DOT E D U>
# Based on pkgbuild by Rudy Matela <[email protected]>
# Date: 2010-1-18
#compile options
_ELVISVERSION=2.2_0 # valid options are 2.2_0 and 2.2_1 which are stable and beta, respectively
_COMPILEWX11=true # X11 support built by default
_SLACKWARECOLORS=false # elvis colorscheme from slackware not installed by default - it's boring
_GENERALCOMPILEOPTS="" # place for you you to define your own configure options
if [ $_ELVISVERSION = "2.2_0" ]; then
_ELVISSRC="ftp://ftp.cs.pdx.edu/pub/elvis/elvis-2.2_0.tar.gz"
_ELVISMD5="6831b8df3e4a530395e66c2889783752"
pkgver="2.2_0"
fi
if [ $_ELVISVERSION = "2.2_1" ]; then
_ELVISSRC="ftp://ftp.cs.pdx.edu/pub/elvis/unreleased/almost-2.2_1.tar.gz"
_ELVISMD5="6959f2f156920db47e4c6324f187e632"
pkgver="2.2_1"
fi
pkgname=elvis_patched-withx
pkgver=$pkgver
pkgrel=1
url="http://elvis.the-little-red-haired-girl.org/"
alt_url="http://elvis.vi-editor.org/"
pkgdesc="A vi clone - with X support (if you wish) - stable or beta version"
depends=('glibc' 'libx11' 'ncurses' 'fontconfig' 'expat' 'freetype2' 'zlib')
source=("$_ELVISSRC"
"http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/pkgsrc/editors/elvis/patches/patch-ref.c"
"http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/pkgsrc/editors/elvis/patches/patch-ae"
"ftp://ftp.slackware.com/pub/slackware/slackware-13.0/source/a/elvis/elvis.clr")
md5sums=("$_ELVISMD5"
'8d9df9aa5edcf8e0b8a2f5d59d1c30c7'
'2bec41d9f09542e2ef41de1e6b41727e'
'c47a70cb176ebf2eb99b055c4048a560')
arch=('i686' 'x86_64')
license=('PerlArtistic')
conflicts=('elvis' 'elvis_slack')
replaces=('elvis' 'elvis_slack')
_DESKTOPFILE="[Desktop Entry]\\nType=Application\\nVersion=1.0\\nName=Elvis\\nComment=A simple text editor\\nExec=elvis\\nIcon=$pkgname\\nTerminal=true\\nCategories=Editors;Programming;Accessories"
build() {
cd $srcdir/elvis-$pkgver
if [ $_COMPILEWX11 = "true" ]
then
_GENERALCOMPILEOPTS="$_GENERALCOMPILEOPTS --with-x"
_COMPILEWX11=1
else
_GENERALCOMPILEOPTS="$_GENERALCOMPILEOPTS --with-x=no"
_COMPILEWX11=0
fi
if [ $_SLACKWARECOLORS = "true" ]
then cp $srcdir/elvis.clr ./data
fi
cat $srcdir/patch-* > patches
patch -p0 <patches
echo -e $_DESKTOPFILE > $pkgname.desktop
./configure --prefix=/usr --verbose $_GENERALCOMPILEOPTS
sed 's/\<CTAGS\>/ELVTAGS/g; s/ctags\>/elvtags/g; s/ant" elvtags/ant" ctags/' doc/ctags.man >doc/elvtags.man
/usr/bin/make || return 1
install -d $pkgdir/usr/bin $pkgdir/usr/share/elvis/ $pkgdir/usr/share/man/man1/
for i in elvis ref elvtags elvfmt; do
install -D -s -m755 $i $pkgdir/usr/bin/
done
cd $srcdir/elvis-$pkgver/data/
cp -r * $pkgdir/usr/share/elvis/
cd $srcdir/elvis-$pkgver/doc/
install -D -m644 *.html bugs.txt $pkgdir/usr/share/elvis/
for i in elvis ref elvtags elvfmt; do
mv $i.man $i.1
gzip $i.1
install -D -m644 $i.1.gz $pkgdir/usr/share/man/man1/
done
if (( $_COMPILEWX11 ))
then
install -D -m644 $srcdir/elvis-$pkgver/$pkgname.desktop $pkgdir/usr/share/applications/$pkgname.desktop
install -D -m644 $srcdir/elvis-$pkgver/data/icons/elvis3.xpm $pkgdir/usr/share/pixmaps/$pkgname.xpm
fi
Last edited by theapodan (2010-01-20 01:15:08)

While I didn't actually read your PKGBUILD here, in general, there's no reason not to submit such things to AUR.

How to generate 3 phase sine wave to output on ELVIS

Hi .I need to make a star or delta connected circuit on ELVIS board.2 make this circuit I need 3 wave generator( with 120 phase shift) and one common ground
and because the ELVIS function generator can only generate one wave I decided to generate countionuos sine wave in Labview.
Now I can generate 2 continuis sine wave in labview and output them on the analog outputs of ELVIS.Ao-0 and A0-1
but I dont know what to do for the third signal.the elvis board just has 2 analouge output and when I use Ao-0 and A0-1 I cant use ELVIS function generator after that.so would u please help me on this problem.how can I output 3 contious sine wave in Elvis.I have attached my VI to this post
Attachments:
new.vi ‏38 KB

Hi, I am also having some problem in generating two signals from two AO. Could you please tell me how to generate two different signals from two AO. I have attached vi which generate square wave from one AO 0. I need the inverted signal in AO 1.
Attachments:
Pulse Width Modulation.vi ‏48 KB

Why is it the NI elvis writer does not compare properly?

I am trying to write the signal from line 0, line 1, line 8 and line 9 so i have 2 NI Elvis writer as i am operating two different circuit. I am trying to compare if its 1/0 in lines and it line 0 corresponds with line 8 (while line 1 with line 9), a non physical LED will light up to indicated the value matches. It only light up when i press onthe button for line 0 and line 8. but when i press the next buttons for each DO lines control, the LED doesnt light up.
Please help! ><
Solved!
Go to Solution.
Attachments:
test3.vi ‏92 KB

Sorry, I don't have the elvis drivers, so I had to comment them out, but here's one possibility...
LabVIEW Champion . Do more with less code and in less time .
Attachments:
test3_MODCA.vi ‏44 KB

FM in Ni Elvis II

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