Generate single ramp signal

I cannot seem to figure out the time parameters of the Simulate Arbitrary Signal.
I want to make a single ramp from -1 to 1 over .990ms then back to -1 in under 10us. So when I put it in a for loop I can get N sawtooth cycles.
I've been pulling my hair out trying different options of the define signal dialog and can't make it happen.
Can someone help me understand the dx relation to the datapoints and how they are affected by the write/sample numbers in the DAQ part? Please.
Christopher
Solved!
Go to Solution.
Attachments:
one_sawtooth.vi ‏2362 KB

This should get you started. You will need to set up the analog output in the software to match your system. If you change the frequency and sample numbers and the loop delay then you can make it go faster and slower much easier.
Tim
Johnson Controls
Holland Michigan
Attachments:
one_sawtooth[1].vi ‏24 KB

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Hello,
I am trying to do something similar to what you mention. I trying to use a labview program with a NI PXI-8106 and NI-PXI 6251 card to send a signal to a 407 controller through the external program BNC connector.
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Attachments:
ATTestControlV1.0.vi ‏261 KB

Generating an input signal

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I am trying to use generate code in signal express to import into labview.

I get this error when i try to generate code in signal express to export to labview . I have tries the error suggestions but I am still having problems. any help would be appreciated
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Typically, this problem is repaired by following the directions on the error message. Since it was not, can you please give us more information so we can start determining the cause?
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Message Edited by DFGray on 08-28-2008 08:23 AM
Message Edited by DFGray on 08-28-2008 08:24 AM
This account is no longer active. Contact ShadesOfGray for current posts and information.

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I'm working with 5661 + 5671.
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Solved!
Go to Solution.

HI
I want to generate a hopping signal with PXI-5671 RFSG and want to analys with PXI-5660 RFSA. While seaching for the related posts i came across ur post, The frequency range in my case is between 200-300Mhz but i will use 200-220Mhz due to BW of 20Mhz...the hopping rate i wil use is very slow as compared to urs..i m trying to do this with 10-20 hops per second..
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Generating a digital signal

Hello,
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Please see the attachment for the developed block diagram
Attachments:
digital signal generation.vi ‏17 KB

It appears that all you posted is one of the shipping examples. Is that all you've tried? You can't control it because you're not actually doing anything inside the loop. You're simply setting the value high before the loop starts, and not changing it in the loop. What kind of device do you have? Is it software controlled? If so, you will need to keep track of the time inside the loop. You can use the Elapsed Time VI to do this. Attached is a simple example to get you started to see how this can be done. I'm sure you can figure out how to integrate what you did and what I've shown you.
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Attachments:
Switching signal.vi ‏29 KB

Generating a flicker signal VI?

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Hello Dennis
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CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

Whether could I generate one AC signal and acquire one DC signal and one AC signal together using NI myDAQ?

Dear Sir:
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Generate single pulse with DAQ card

Hi
I was trying to use a VI found on the NI site "generate single
pulse "DAQ-STC" but another VI is requested in order to run;
that's "set pulse specs.vi". Someone knows where to find it?
thanks for all
bye
-Claudio
Claudio Vinegoni
URL: http://www.gapoptique.unige.ch/members/vinegoni/default.htm
GAP-Optique Phone: +41 (0)22 7026158 (lab)
University of Geneva : +41 (0)22 7026082 (office)
Fax: +41 (0)22 7810980
20, Rue de l'Ecole de Medecine Email: [email protected]
CH-1211 Geneva
SWITZERLAND
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As of NI-DAQ 6.9, you could find the Set Pulse Specs.vi in LabVIEW/vi.lib/daq/zadvctr.llb.
Erin
Claudio Vinegoni wrote:
>>>Hi>I was trying to use a VI found on the NI site "generate single>pulse
"DAQ-STC" but another VI is requested in order to run;>that's "set pulse
specs.vi". Someone knows where to find it?>thanks for all>bye>
-Claudio>-->************************************************************************>Claudio
Vinegoni>>URL: http://www.gapoptique.unige.ch/members/vinegoni/default.htm>>GAP-Optique
Phone: +41 (0)22 7026158 (lab)>University of Geneva
: +41 (0)22 7026082 (office)> Fax: +41 (0)22 7810980>20,
Rue de l'Ecole de Medecine Email: [email protected]>CH-1211 Geneva>
SWITZERLAND>>****************>>>Sent
via Deja.com>http://www.deja.com/

Generating Multiple Modulated Signals

I was a bit surprised I didn't see this on the forums, though I am new to the RF gear. What I would like to do is generate two modulated signals, such as 802.15, on two different frequencies. I am already able to create the signals individually using the modulation toolkit. I am using a PXI-5671 RFSG. I have found how to generate with interferance two CW tones in the examples, but do not see how to generate the two modulated tones. I also need to be able to set one of the modulated signals to a lower power than then other. I am trying to test adjacent channel interferance with modulated signals. Any thoughts?
Troy

Hi Troy,
There are a few tricks you can play here but
they are completely independent of hardware and more on signal
processing. Basically you need to write both waveforms at the same time
with different frequency offset.
1) Frequency Shift. Assume you
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One of them will
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The
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2)
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Here is a spectrum of the composed signal:
I have attached
an example to do this using 802.15 signals with a few modifications: I
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hardcoded the number of samples per symbol so the maximum frequency
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Message Edited by Yardov on 10-17-2008 06:05 PM
Gerardo O.
RF Systems Engineering
National Instruments
Attachments:
frequency shift.jpg ‏9 KB
Generation Multiple Channels.zip ‏32 KB
spectrum.jpg ‏79 KB

Generate single ramp signal

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