Agilent 33220A (Function Generator) .. To Turn ON DC output

hi ,
Iam using the 33220A ,Agilent function generator ..with labview 8.5 ..
I need the control or Subvi that will output a DC .. i.e on the agilent ..Utility->DC off/On .. i need to activate the DC ON ...with a particular Dc offset voltage ..
Iam unable to find a subvi which can do this ..
Iam currently using the labview driver downloaded from the ni.com.
Thanks,
Anwar.

Have you tried ag33xxx-Config Waveform? One of the waveform shapes available is DC and there is control called Offset.

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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.

Fixed number of pulse using agilent 33220A

Hi all,
I am trying to produce five pulses with Agilent 33220A function generator ..
i am attaching my VI for your review...
the problem is ,, i can able to send the command for digital pulse of required parameters ,, and the function generator starts producing constant pulses...
but i want only five or fixed no of pulses ,,,
i have tried using the loop concept and not succeded ,,
Any suggestions would be grateful...
by Rozita
Attachments:
Agilent33220A-pulse.PNG ‏51 KB

You need to configure a burst in TRIG mode and send a software trigger to start it. Refer to the 33220A manual for more details.
Ben64

Agilent 33220a drivers for LabVIEW 2009

Hello,
aprox. 3 Weeks ago i downloaded a driver for the Agilent 33220A Waveform generator.
Well i lost that one and tried to download it again from here:
http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E9066659CE034080020E748...
The Problem is that the downloaded File is 0kb of size.
Anyone else got this Problem? Maybe someone can tell me another download link.
Thanks!

Well i'm at home now and you are right, it works
It just would not work at the University.
Anyways tanks for your time!

Configuring and Controlling Agilent 332220A signal generator...

Hello,
I am trying to configure and finally control Agilent 33220A signal
generator through my Labview VI. Signal Generator has USB, LAN and GPIB
interface. Measurment studio recognises it, however I need assistance
to proceed from that point. I would be happy, if some body can guide me
through this process.
Any online manual or user guide would be great.
Thanks in advance...
Shivaram

Hi Sine,
Just to recall what all I did,
* Downloaded agilent signal generator instrument drivers from the link given below.
       http://sine.ni.com/apps/we/niid_web_display.download_page?p_id_guid=E3B19B3E9066659CE034080020E74861
* Extracted the downloaded zip file to get a folder by name "ag33xxx".
*   Then copy paste this folder in the location given below.
       C:/Program Files/National Instruments/LabVIEW 7.1/instr.lib
*   That's it. You are done. Connect the signal generator either through USB cable or RS232 or via LAN.
*   Now you can communicate and control the signal generator
through the labview VIs. You can do so by right clicking in the block
diagram then, point to "Input", "Instr Drivers". I have attached a
screen shot of it.
* I have also attached a VI, which I have developed with the help of this form.
Hope this information helps...
-Shivu
Attachments:
agilent_signal-gen.jpg ‏78 KB

Sending waveform to function generator?

Hello all,
I am using an agilent 33205A function generator and require it to use a
special driving waveform. Currently I load the waveform using
this HP Benchlink software. I would like to automate this in the
startup of my vi. Is there a way to download a "home-grown"
waveform to the function generator using labview?
Thanks,
Azazal
Azazel
Pentium 4, 3.6GHz, 2 GB Ram, Labview 8.5, Windows XP, PXI-5122, PCI-6259, PCI-6115

If you're using the driver from here, then use the function called ag33xxx - Arbitrary Wfm Ops. You will have to create the waveform in the form of a 1D array. Look at the high level example called ag33xxx - Arb - Application. I don't see a function in the driver that allows you to output a defined waveform so you may want to look in the instrument manual to see if there is such a function. If there is, then it should be a simple matter to read it and then place the values into LabVIEW as a constant or something you read from file.

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.

Synchronizing function generator outputs

I am a grad student learning Labview for use in research. What I am trying to do right now is figure out how to sync up two function generators that are generating a simple sine wave output. I am using a stanford research systems ds345. I setup the code so that each machine is set to an external clock and I have attached the corresponding cables on the machines to sync up their clocks, but I am still not seeing a good synchronization of the phases of the waves. I have attached my simple practice code and I would appreciate any suggestions with this.
My ultimate goal here is to create a program that is turning the two sine waves on and off in sync (or real close to it) while having the sine waves being in opposite phase with each other. The frequency of the waves will also be changing to different values when the sine waves are turned back on.
Attachments:
Practice.vi ‏53 KB

Ace02,
I believe that you are missing triggers for your waveform generation. Triggering would allow you to match up phases the way your application requires. Looking at your current code, I can't see any triggering set up, so right now there is no way to determine phase, all you have set is a sample clock. I haven't used that particular instrument myself, so I can't comment on how to actually configure triggering, but I would recommend looking into that.
Regards,
Ben
National Instruments
Certified LabVIEW Associate Developer
Certified TestStand Developer

I am using the function generator example

i am using the function generator example to send sine, triangular, sawtooth waves to oscilloscope.
I would like to send not only the symmetric but also unsymmetric amplitude of each wave.for example the upper peak of the amplitude, i could adjust as 2 volts and the lower peak as 3 volts or vice versa.how it works in function genartor example.Please note the i am using data acquisition card AT- MIO-16XE-50 for this purpose.please tell me with some example.

To add a terminal to the connector pane, right click on vi icon and select show connector. Notice that the mouse pointer turns to a wiring tool when over the connector. Click on a small box inside the pane and then click on a front panel control or indicator to connect that box to the control/indicator. Then repeat for the next control/indicator. Do this until all the inputs (controls) and outputs (indicators) you need are defined. Normally, all inputs are on the left half and all outputs are on the right half, and Error In is connected to the bottom left box, and Error Out is connected to the bottom right box. You can change the terminal pattern by right clicking on the connector pane and pointing to pa
ttern and then selecting a pattern. To make the graph as an output, click on the top right box then click on the waveform graph.
As for continuous update, put the graph inside a loop where you generate your waveform and wire the output to the graph. As long as the loop is running, you will get a continuous update. The Y axis can be configured for amplitude and the X axis for time. Right click on the graph and select properties. Play with this to become familiar with all aspects.
- tbob
Inventor of the WORM Global

I want to use the Function Generator VI to send command signals through the NI 7344 motion controller. This will be a closed loop servo valve system. I want to be able to change from say a square wave to a sine wave on the fly. Idea's?

I am going to run tests that require an actuator to move using various types of arbitrary waveforms such as sine or square. The NI 7344 is hooked to the UMI that is going through a driver for a servo valve. The loop is analog and it is closed. I have played with some of the examples but can't get it to work. I have used the function generator VI to generate a signal but I think I am using the wrong input VI to the motion control board. When I use what I have it moves the servo and then stops. It doesn't continually generate the signal.
I would love to use the controls on the function generator vi to control frequency and amplitude ect. Any help or pointer would be helpful. Thank you in advance.

Hello,
I'm not clear on exactly how you want to use the generated data but I'm assuming they will be used as your target points.
There's a built-in example for motion called 'One-Axis Contour Move.vi'. This example demonstrates how to provide your target points as 1-D array. All you need to do is to replace the input array with the output of the function generator. In order to have it run continuously, use a while loop. You can further program your application so that it'll change the waveform on the fly by monitoring the user interface but this might be little little tricky as you will need to reset the move and load the new generated points while keeping track of your current position.
I hope this helps. Let me know if you have further questions regarding this
application.
Best regards,
Yusuf C.
Applications Engineering
National Instruments

How to read data from a GPIB when sending a function generator command

I'm using Visual C++ with the ComponentWork ActiveX and I'm tring to plot a
CWGraph using the data coming from a GPIB device. When I write command such
as "*IDN?" to the GPIB device, everythings if fine and I can read what the
GPIB device return me. But when I send a command like "SOUR:FUNC SIN;SENS
DATA?", the writing seems to be okay, but when I try to read the data, I
alway get a "Timeout expired before operation completed" error message. I
have tried with the CWGPIB and with the CWVISA but the result are the same
with both.
My reading code looks like this:
COleVariant vReadBuffer;
vReadBuffer = m_VISA.Read( COleVariant( (short) 2000 ) );
and it work fi
ne for "*IDN?" or for multimeters command.
I want to know how I must read the data for function generator commands.
Thank alot

It sounds like your device is not accepting that command string as valid. The string you listed above is probably missing a colon between SENS and DATA. "SOUR:FUNC SIN;SENSATA" Try sending this string in Measurement & Automation Explorer to the instrument first to make sure it is working.
Best Regards,
Chris Matthews
Measurement Studio Support Manager

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.
Unofficial Forum Rules and Guidelines - Hooovahh - LabVIEW Overlord
If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

How can i add one wave in in our Function generator example?

how can i add one anotehr wave in our function generator example. i want to use superposition and add one more wave to our first wave in function generator and see the result.thanks

Hi hood1,
2 options:
1) You can add many waveforms by combining them into one Array.
2) Use the Waveforms tools, that give you many option for adding waveforms. one after the seconed or adding the Y array of a waveform to other Y array of second wave form, and so on...
Hope it Helps...

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

Agilent 33220A (Function Generator) .. To Turn ON DC output

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