Labview function generator bk precision 3011b

Iam using bk precision 3011B function generator,labview 6.1,windows NT.please help me in transferring,reading data from the instrument to labview(like how to connect,drivers required).thanks.

I found the instructions manual for the BK precision 3011B online but there was no indication of any type of communications port (like a GPIB, serial, or TCP/IP) or a command set that the instrument responds to. So it does not appear that the 3011B can be controlled remotely.

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Create a melody with Labview/ Function Generator

Hi (first sorry for poor english, not my native language)
I have a project at school which is creating a melody using Labview and a function generator. I've worked on it for hours now and i still can't get through it.
I joined the vi file with my post so you can get a look at what i've done so far.
First, i do'nt know which loop i have to use (u'll understand soon enough if u just take a look at the vi file), the problem is that i want to create 4 arrays using 2 text files.
The first one is used as a reference : exemple the frequency to play an A is 440Hz, so my first text file looks like that :
A 440
B 493
the second one is my melody, which includes the notes and the tempo (in ms)
, so it's like :
B 1000
C 1500
I used the first two loops to seperate each string lines of my files so I have at the end 4 different arrays. One containing the note's references, one containing the frequency, one containing my melody's notes and one containing the duration of each notes.
The problem is that when I use a while loop, it seems that my arrays are not containing every elements it should, it only has the last one. Just try to run the vi file.
Could anyone give me some help ? Don't hesitate to ask more questions if u didn't fully understand my problem !
Thx
Attachments:
PR.vi ‏19 KB

Hi claudeuntel,
Your array contains just the last note because at each for loop iteration a new table is created.
You have to send the table you created at one iteration to the next one.
To do this you can use shift register.
I didn't have tested the VI below but it should looks like that.
Valentin
Valentin
Certified TestStand Architect
Certified LabVIEW Developer
National Instruments France
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Quit LabVIEW function generates crash report in executable

Hello,
I am using the Quit labVIEW to close down an application when the VI is built into executable. If stop LabVIEW is used the application just stops and leaves the window open. When the Quit LabVIEW function is used in an executable the application closes down completely.
In the current app I am developing (Windows 7 - LV2014SP1) I have isolated the Quit LabVIEW function as the source of the Crash Report I am receiving after I exit the application. I inpsected the crash report and there was mention of a thread that did not have appropriate access. So I ran the same executable with Adminstrator privledge and the error went away. It appears the application I am developing does not have sufficient privledge to close itself down and this is generating the Crash Report.
I have used the Quit LabVIEW function for many applications in the past without issue. I have not confirmed yet whether the problem is specfic to the current application I am developing or to LV2014SP!.
thanks for any help with resolving this issue,
- Troy
Solved!
Go to Solution.

TroyR wrote:
Wasn't there previously some issue with using Invoke Node in executables?
Not that I am aware of. But here is my trick for shutting down an application. I put the FrontPanel Close method inside of a Conditional Diagram Disable. The invoke node only goes into the RunTime Engine == True case. This way, the front panel is not closed if you are in the development environment.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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Labview 6 arbitrary function generator file format?

Hi,
I have old hardware (e.g. DAQcard1200) which I have to use with old versions of Labview (4 or 6) (as they run on "old" hardware - Pentium1 embedded boards with Win98 etc.). With Labview 8 I can load a file in .lvm format and use it as output for A0. But how is this with the "arbitrary function generator" from Labview 6 (benchtop.llb)? I constructed an arbitrary function manually within the vi and saved it to a file, but its format does not make sense - only "strange" characters are displayed, like dŸ¾ “£¾ˆt÷¾ VJ¾– ¾ ñ¾£úD¾ªÛ˜¾±¼ë¾¸ž, if I open the file with an editor...
Thanks!!
;-) Torsten

I don't have LabVIEW 6.1, but if the example hasn't changed, then that example writes out a binary file, which is why you get all those "strange" characters. The file should be an array of SGL values. Thus, you can read it into LabVIEW using the Read From Binary File, and wiring an SGL constant to the "data type" input.
Attachments:
Example_VI_BD6.png ‏1 KB

Labview NI ELVIS function generator error

Whenever I run my vi one time and run it again for a frequency sweep it sometimes shows an error
Possible reason(s):
Resource requested by this task has already been reserved by a different task.
Task Name: _unnamedTask<1314>
What does this means?
here is an image of my block Diagram
Attachments:
Bode_Plot.png ‏46 KB

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

Can not get example to work after following instructions given in "Getting Started with the NI LabVIEW C Generator" guide

We explored using sbRIO for our project, for different reasons we ended up going with a different embedded solution . We are currently evaluating the LabVIEW C Generator to convert some of the core analysis routines from LabVIEW to C so the team that will be creating the embedded solution don't have to re-implement them from scratch.
Before converting our code, I followed the instructions given in the "Getting Started with the NI LabVIEW C Generator" manual to create a static library created inCygwin using GNU Compiler Collection (GCC).
I managed to compile the code, but when I type "run GCD.exe" in the Cygwin console, I just see the window flash with no time to see if the result is correct or not. I modified the main.c cde to add a getchar(), but the window still just flashes and now I am left with the GCD process still running and have to kill it using Windows Task Manager.
Has anyone else got this example to run? I am sure I am missing an obvious setting or step, please help me.
More details below.
Thanks,
Fab
Here is a video showing the steps I followed
If you don't want/can't see the video. Here are some screenshots of what I have done so far:
GratestCommonDivisor.lvproj C Generation build specs Information:
C Function prototype definition:
I copied Makefile located at: C:\Program Files (x86)\National Instruments\LabVIEW 2011\examples\CGenerator\Tutorial\Cygwin
and replaced both Makefile and Makefile.cygwin in the directory where the C code was generated
I also copied main.c from the same location and replaced the one generated
Here is the snapshot of the results after executing "make GCD.exe"
Then to run it I just type
I see a window open and close really quickly and I never see the result. I have tried adding the getchar() line to the main.c file, but still I don't get to see the results.
Certified LabVIEW Architect * Certified Professional Instructor * LabVIEW Champion

Hi Kevin,
I hope you had a good Thanksgiving. I am attaching a zip file with the LabVIEW project, my build specification and my version of "Greatest Common Divisor.vi", which should be the same as the one that you have that ships with the LabVIEW C Generator, but just in case. I am also attaching a zip file with the C files generated by the LabVIEW C Generator.
You can also see the video I posted earlier with the steps I followed. I hope you are able to point out where I went wrong.
Thanks,
Fab
Certified LabVIEW Architect * Certified Professional Instructor * LabVIEW Champion
Attachments:
GreatestCommonDivisor.zip ‏8 KB
CGen Files.zip ‏71 KB

Oscillioscope and function generator

Hello,
How difficult is it too create a virtual oscillioscope and a function generator that outputs through ethernet or usb to some NI module (Chassis, analog, digital etc) that will send signals to a circuit? So, basically instead of having an oscillioscope or a function generator, you create a virtual one on labview and can send signals to the circuit in the real world. Is that even possible? And if it is how hard do you think the task would be?
Thanks in advance for all the input!

So I happen to have a myDAQ at home and I thought I would try to use it as a scope. Checkout this video after a 1:30 for a demo of some of this software. The software it comes with has all the test panels for various instruments for scopes, DMM, function generator, aritrary waveform generator and several others. The hardware also appears as a normal DAQmx device if you so choose to write your own software.
Honestly it isn't half bad. Maybe it's because the software mirrors normal scope functionality but I was able to see my signal and understand it, when I had no other hardware that was capable. It won't replace a desktop scope but it's what I had on hand.
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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

How to write a function generator

How to write a function generator from labview and using PCI-MIO-16

Hallo, [email protected],
Du (x) meintest am 27.07.01 zum Thema How to write a function generator:
> How to write a function generator from labview and using PCI-MIO-16
Look to the examples - there are many VIs with that function.
Viele Gruesse!
Helmut

VIs for Agilent 33250A (function generator) and SR-844 (lock-in)

I am new to Labview. I was unable to find VIs for Agilent 33250A (function generator) and SR-844 (lock-in). Can someone help me find these?
Solved!
Go to Solution.

What did you actually search for? I just went to the Instrument Driver Network, entered '33250A', found it's driver, entered '844', and also found it's driver. I did not try this from the Tools menu in LabVIEW but it should also have found them.

Sending .arb files to function generator

Hi
i am very fresh to labview programming.
I have created some waveforms using HP BenchLink software(and saved in .arb file format). Can i send these wave forms to a function generater through Labview program . if possible   how can i do that
Thanks
jith

Hi
Yes i have downloaded the driver ag3xxx and installed . and   also got some advise from [email protected]
Their comments follows .
                Yes you can read the values from the .arb file into LabVIEW and store
the values in 1D array or text file and then send it to the function
generator you are using.
Basically you would have to use APIs such as read from binary
file(there are examples present in LABVIEW example finder which shows an
example of how you could read a binary file.) After reading from the file
you could store its values in an array or a text file and the read from
this array and send the data to the function generator you are using. If
you are using a function generator which is not made by National
instruments you have to install the device drivers for that instrument fro
LABVIEW, you could install them from www.ni.com/idnet.
             i have used some eg: programmes   given in LV to read binary files .
             The function name is "read binary files vi " . the out put of "read binary files vi "
             is data . I am trying to store this data in an array , but   got stucked , in finding
             a sutable function to send this array valuse to the function generator. Can i send
              the array out put directly to a FG ?
Thanks
jith

DC offset problems in NI-5401 function generator card

When i give a Dc offset of 1 Volt the output of my function generator reads 1.97v. what is the reason behind this,why is it so what setting have to be made so as to get the dc ofset only when no ac signal is given.

Hi. The NI 5401?s output voltage is specified in terms of 50 ohms. This means for a 50 ohm load, you should see 1.0 Volts for a 1.0 Volt setting when the load is 50 ohms. For an other than 50 ohm load, there is a voltage divider action that takes place, where the voltage will vary up to double the size for a high impedance load, such as most default oscilloscope settings. The Connecting Signals>>ARB Connector section of Chapter 1 of the NI 5401 user manual describes this in further detail.
To generate just a DC voltage level, there is an option for DC as the Waveform to use when programming the device. The LabVIEW niFgen Function Generator Example shows this on the front panel. If you are using the Sources Soft Front Panel, when the Standard Function Output is se
lected, there is a DC Voltage level selection button available to be selected to generate a DC voltage.

Problems with the Stanford Reseach Systems DS345 Function Generator

I'm writing a labview program that will allow operation of the Stanford Reseach Systems DS345 Function Generator. The problem that I'm having is in the amplitude calculation. The way the driver finds the amplitude is by recieving an array of what are essentially y-coordiantes (on a cartesian graph system), finding the max and min of the array, and subtracting them.
This is where the problem lies. I've designed my program so I can type in an equation, see the graph of this equation, and send the y values into a the subvi provided by the driver. This subvi is the one that finds the amplitude...etc and sends it to the oscilliscope. However, when I use a formula for something as simple as sin(x), it caclulates the amplitude as 2. This is because the max/min values of sin(x) are 1 and -1. So the function generator reads in an amplitude of 2. This amplitude of 2 results in a sine wave that oscillates between 2 and -2. Obviously, this is not what I'm looking for. I know by dividing the sine wave coordiantes by 2, or just using the max/min value to be sent to the function generator as the amplitude will work in this case, but not for all cases (ex: sin(x)*e^(-3x). I'd appreciate any suggestions on how to fix this amplitude problem for all cases.
In addition to having this sine function, I wrote a subvi that essentially generates a series of pulses depending on the user preferences. It's relativly complicated to explain how it works, but it just sends an array of y-coordinates (similar to above, and they are sent to the same subvi to be sent to the function generator). This array is the one that truly puzzles me.
For example, I have a single pulse, with height 5. The y array is 10 places big. At index 0 to 3, the y value is 0. At 4 to 6, the value is 5. And from index 7 to 9, the index is zero again (Imagine a pulse "_|-|_" , it may help understand this).
I send this array of 10 places to the same subvi as the one described in the sine function earlier. I would expect the amplitude to go in as five (max - min), and it does. However, when determining the actual value from the oscilliscope, it turns out to be 10.8 peak to peak voltage. The values range from -.8 volts to 10 volts. I can't imagine why they do not range from 0 to five as specified in the array which is sent.
If anyone has any answers, suggestions or questions concering this description, I would greatly appreciate it. Feel free to post answers or email me at: [email protected]
I'll be more than happy to post the files if someone wants to look at them.
Thanks again,
Jim Dalton
North American Lighting
[email protected]

I am taking these measurments using the measurment and automation explorer test function. I set my range on all channels to 0-8khz and Have been inputing no more than 8khz. What leads me to believe I have a software or config problem is that I sent in a module to NI for repair and this is the brand new one they sent me back. While testing this module, I also have a 1102 module and 1124 module on the scxi-1000 chasis and both of those are working as specified. I also moved the 1126 module to slot 1 and ran it that way as well when I replaced the chasis.

Why some Vi in LabVIEW Functions panel are not in PDA Functions panel?

why some Vi in LabVIEW Functions panel are not in PDA Functions panel?
such as "MT Generate System Parameters.vi".......can not run on the PDA window and say:"MT Generate System Parameters.vi":subVI is not executable.

mathan wrote:
WenBin wrote:
up
could you please explain in bit more detail
Looks like a lame attempt to "bump" the thread.
Adding a (nearly) empty message places the thread back on top of the list, in the false assumption that this would generate more replies.
Well, he's partially correct, because it added the last three posts (which of course have nothing to do with the problem at hand), but it did not increase the "real" answers.
Bumping a thread is disruptive and generally a bad idea, because it adds a lot of noise to the forum. Imagine everybody would do it! There would be so much elbowing for the top spot that all substance would be lost in the chatter.
In the NI forums, bumping a thread is very counterproductive, because blue contributions (from NI) will typically (and hopefully!) wait until the thread is idle for a while.
Overall, it is a bad idea!
LabVIEW Champion . Do more with less code and in less time .

Hp 3311 A function generator GPIB

Hi, I've a Hp 3311 A function generator and I'd like to control it by GPIB. I'd tested with the example in labview "GPIB.vi" but when i send it a command, pej "APPLIN 1.0E+3, 3.0, -2.5" it doesn't work (It makes only a sound "Bip" ).
Does anyone knows why the function generator doesn't generate the signal?
Note: When i send it the command IND?, the instrument returns the name "Hp 3311A", but when i send another command it doesn't work.
Thanks. Regards, peliasrojo.

Hi. I don't use the drivers, I'm using the example GPIB-VISA. I'm be able to change the type of function (sin, square, etc) but when i try change the frequency or the others parameters it doesn't work.
I've attached the program (v2011). The program only tries to apply a square signal with visa commands.
The manual shows an example of a sine function: "APPLIN 5.0E+3, 3.0, -2.5" that generates a sine function of 5kHz, 3Vpp and an offset of -2.5V.
Thanks, regards Peliasrojo
Attachments:
GPIB-VISA (modificada).vi ‏11 KB

Labview function generator bk precision 3011b

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