Software simulated digital to analog conversion of signals

Any ideas about 100% software realisation (full software simulation) ? Is this possible? Ideas about realisation? Thanks in advance.

Hi Redstorm,
I am not sure I've got your point. If you're on to use it, here you are:
http://www.falstad.com/circuit/
Choose A/D category in the pull-down menu (circuits)
If you want to build one in LabVIEW, you can do it based on the attached schematics.
Good luck!
Best,
Matyas

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AD5541/5542 Digital-to-Analog converters from Analog DEvices

Dear Friends,
Does anybody have experience programming in Labview the AD5541 or
AD5542 boards (Digital-to-Analog converters) from Analog Devices (http://www.analog.com/en/prod/0%2C2877%2CAD5541%2C00.html)?
LabView code examples or description of the general approach to this task would be much appreciated!
Thanks in advance

ampm <[email protected]> wrote in news:[email protected]:
> Update: My PXI system has NI-6534 board which I can use
> for digital output. But I need to perform Digital-to-Analog conversion
> by the remote AD5541 board.Is there a way to do this?
That's a chip, not a board. Get the data sheet, look at the logic
diagrams, and you should be able to bit-bang the three logic inputs (well,
two plus a chip select) with your 6534.
Alternatively, the chip uses SPI communication. You can probably find some
help by searching for SPI on the NI site. It also looks like a third party
has a $200 solution the will let you do this via a parallel port, complete
with labview drivers, at http://www.calbay.com/product16.html
Scott
Reverse name to reply

Array of different (digital and analog) values into multigraph

Hello everyone,
So I have an array with a timestamp on the first column, either "off" or "on" string on the second column, and a number value string on another. The columns are based of variables that reads data based on an update rate. My question is, what is the easiest way to separate these values into a digital and analog graphs. This is because the number values are so high that the "off" and "on" signal is being pushed down as the y-axis auto-scales. I'm hoping that I can use a multigraph, but the multigraph puts the data in one graph (since it's one array).
Any suggestions or help is appreciated.

Hi jachy25,
Below is a link to a KnowledgeBase article that goes over how to use stacked plots in LabVIEW.
http://digital.ni.com/public.nsf/allkb/21E8163F259DA2058625703B007511AA
The second link contains a lot of general information on configuring graphs and charts in LabVIEW, and is a useful document to have when configuring plots.
http://zone.ni.com/reference/en-XX/help/371361L-01/lvconcepts/customizing_graphs_and_charts/
I hope this information helps!
Regards,
Kelly B.
Applications Engineering
National Instruments

Need some suggestions for creating a software based digital I/O counter

Hi All
I've been using LabVIEW to sucessfully create a number of fluid level monitoring applications for oil well drilling. bear in mind that I'm a geologist not a software engineer so you may have to talk/type slowly .
I've been using the USB 6009 & 6008 for these aplications so far, they are however limited by only having 1 counter per DAQ. What i'd like to do (if possible) is use the some of the digital I/O channels as counters. The events i'm attempting to count are simple open/closed pulse signals from a micro switch. The micro switch is attached to a slow running mud pump which is sending up to 3 pulses per second but is usually running at 10-80 pulses per min. The slow cycle rate of these big pumps means I can't use a frequency aplication as they don't seem to work below 1hz.
I've tried to use a case structure to create a counter but I'm afraid I can't seem to get the logic right to turn the output into a counted output. Anyone got a suggestion for things I could try?
Thanks
Kim

Kim,
Tttt yyyy pppp iii nnn gggg slowly.
You described your situation quite clearly.
As you probably know the digital inputs on the USB-6008/9 are software timed, so you have some uncertainty in the time of any sample. Depending on your OS that uncertainty will typically be on the order of a few milliseconds but occasionally may be much longer.
To count the pulses in software requires a combination of several things.
1. You need to have a data acquisition method which is fast enough to capture each high and low state of the pulses produced by the pump. For software timed Digital Input a good way to do this is to have an independent, parallel loop which reads the input line rapidly and passes the data or transitions to another loop via a queue. This is known as the Producer loop in a Producer/Consumer architecture. Examples come with labVIEW. A 10 ms Wait in the loop is probably appropriate.
2. You need to convert the digital inputs (levels) into pulses or transitions to be counted. Suppose you want to increase the count by one every time the logical level changes from False to True. To do this you need to know the previous level and the current level. A shift register is one of the best ways to do this in LV. Add a shift register to the loop. Initialize it to False. Connect the result of the Digital Read to the right terminal of the shift regsiter inside the loop. When that Read is True and the previous value (obtained from the left terminal of the shift register) is False, increment the count value (which is also kept in a shift register) in the case structure.
3. You did not indicate what you are doing with the counts or what the pulses represent. Do you need to measure the frequency (or the period which is the reciprocal of the frequency)? Do you need to accumulate the number of pulses? Over what time period?
Lynn

Monoprice TOS digital to analog audio converter...

does NOT work with a split optical signal. Signal is too weak for the converter to do the job. (Previous posting about this in pre-release forum is no longer available).
Best bet is to use a TOS optical switch instead of a splitter to ensure that the optical signal is not attenuated:
http://www.monoprice.com/products/product.asp?cid=104&cp_id=10423&cs_id=1042302&pid=2946&seq=1&format=2
Kevin

Even better, for those who need to connect ATV2 to receiver via both analog and digital audio input to enable multi zone support (Denon receivers) here is the best solution that does not require a splitter or a switch:
http://www.ambery.com/aldiaufoco.html
This device will pass-through the TOSlink optical signal while simultaneously converting and sending analog decoded audio signal. A bit pricey, but this seems to be the best no-hassle single-box elegant solution.
Kevin

Breakoutbox for Digital and Analog Output

Hallo everybody
i need to design a breakout box with BNC and SMD connectors for Digital and Analog output (the DAQ cards we use are PXI-6723 for analog and PXI 6259 mostly for the digital an fast AO Channels) I am looking for tutorials and info material for that. On what I have to pay attention what would be a good circuit diagramm design and so on.
Maybe you could give me some tips where I can find good Material about that.
Sebastian

Hello Sebastian
first of all I'll need some more information about your intention. What exactly are you going to do? Do you want to connect, or divide signals? (Which signals?)
Maybe if you have a look in the manuals of the cards, you'll get closer to this. Here you can find out the pin assignment of the cards.
Manuals and specification:
PXI-6723:
http://www.ni.com/pdf/manuals/370822c.pdf
http://www.ni.com/pdf/products/us/04-3513-301-101-DLR.pdf
PXI-6259
http://www.ni.com/pdf/products/us/044063301101dlr.pdf
http://www.ni.com/pdf/manuals/371291h.pdf
Regarding
Gregor Allexi

Digital vs Analog....

Does it really matter? I tried Digital and I tried Analog and I noticed no difference in sound.
Message Edited by NpGreg04 on 02-18-2007 07:08 PM

Depends on the sound card and the speakers/decoder. Well, lets be honest, if you tried them both and cant hear a difference then no, it does not matter and you should use whichever is easiest.
Really you want the device with the best DACs doing the conversion to analog. If you have a decent home cinema amp or something you are probably best running digital to that. Otherwise, the latest audigy/x-fis have good dacs so should probably be used. Might be worth reading the specs of the devices to find out which is best handling it.
Other factors are things like the source (movie in dolby/dts or 5.1 from a game or music). Its also a nice idea to have the analog conversion external to the pc so there is less noise introduced (power/interference), but with modern soundcards thats not likely to be a problem.

PM, QPSK, QAM, OFDM software simulations and examples

Hi everyone,
I am trying to find examples on Phase Modulation and other modulation examples (but currently PM modulation is the 1st priority) but i look for the tutorial in NI website they only provide Amplitude and Frequency Modulations Examples on software simulation. Anybody knows where to find or even has this modulation example can you please tell me because i really need it for my project. Thanks!

Hi,
actually i just trying to use examples in NI for my project as a VI exercise to let understand the concept of each modulation. Because in NI tutorial website, there are simple software simulation exercises to let people download and know the concept of each modulation. I am trying to use these examples in my project to let people understand more in the modulation. Please see the exercise i have uploaded you will understand more. I have downloaded AM, FM, ASK, FSK and PSK but i still need others. Now, i trying to finish the catergory for analog modulation, AM, FM and PM. So i finding PM modulation now, the url u have written i seen it before but i think i cant find what i want. that's y i am also asking if anyone happen to have it or create it by yourself, would you mind 'sharing' it with me by uploading the files if you happen to have it.
Attachments:
[Universal Communication Training Kit] HI.vi ‏115 KB
Universal Toolkit.PNG ‏138 KB

Is anyone else trying to use Edge Animation to create software simulations?

We're in the process of evaluating Edge Animate to create software simulations. We want to use it because it has many great HTML5 functions. We're also evaluating Captivate7 - which also has an HTML5 option - but it lacks some of the functionality we're looking for. Like the ability to show users a 'hint' when they hover their cursor over an object. Why that functionality isn't there already - I still can't figure out. It would be create if Adobe could take some of the functionality in Edge Animate and incorporate it into Captivate! It would make an awesome product!
If you're attempted or were successful creating a software simulation using Edge Animate - I would be interested in hearing how you accomplished it. Also looking for some best practices around this idea.
I think Edge Animate would be an amazing product for software simulation if it incorporates a few enhancements.
In the timeline - allow the user to nest things. The timeline can get unwieldy quickly. Would be nice to be able to nest items and then twirl the nested items to hid them - like in AE.
Enable AE functionality with the ability to play one Edge Animate piece inside another.
Provide the ability to add video with transparent backgrounds. We wanted to have someone walk on screen and appear as if they were walking on the software. Can't do it in Edge Animate!
If you have any other ideas or suggestions for creating software simulations in Edge Animate - would be great to hear from the community

Hi there,
Thanks for your suggestions! We're looking at ways to make the timeline more flexible as far as nesting and/or hiding elements, so hopefully these types of improvements will come as Animate continues to grow. Just wanted to quickly pop in to address a few of your bullet points - hopefully, other Animate users can answer regarding whether they use Animate for software simulation.
Your first two points (I think) can be at least somewhat addressed by using symbols. Each symbol has its own timeline which can contain many elements, but it will appear as a single element in the main (Stage) timeline.
Regarding video, there's currently only one HTML5 browser that natively supports video with alpha transparency: Chrome, using video encoded to the webm format. See here for more info: Alpha transparency in Chrome video - HTML5Rocks Updates
Once other browsers start incorporating native support for video with transparency, this could be pretty cool. But as of now, native browser support is still quite limited.
Thanks,
Joe

Can I show quiz results in the recording of software simulation?

Hello, Everybody, I'm using Adobe Captivate 7. I want to show quiz results after recording the software simulation. If the recording type is training, the user need to click for the instructions. When the user's click is wrong, the captivate will show the failure message and I want to reduce my score due to the wrong click. Please give me a instructions. Thanks!!!

Please do not double post issues.

How do i remove popups in software simulation - captivate 8

Hi,
I have recently moved to captivate 8 - straight from captivate 4. I have recorded a software simulation and am now in the process of editing it. On some screens captivate has captured the popup messages you get when you hover over a button or link, in the past in captivate 4 i would copy the background out of captivate, remove the pop using paint or photoshop and paste the edited background back in to the simulation.
In captivate 8 i finding i am unable to do this. When i preview the screen capture the pop up message appears, however when i look at the background there is no pop up. It seems to be there as part of the screen capture, if i use the skimmer to run over the timeline the popup appears in the last few seconds, if i trim the slide of the seconds the pop up remains. I have been unable to find any options for removal of the pop ups.
Does anyone have a solution for this problem?
Thanks
Glenn

Yeah, somehow those tooltips are animated in the background slide.
My fix: edit that background slide in Photoshop, ensure it shows what you want (i.e. not the tooltip), copy (or save) that flattened background image, back to Captivate, create a new slide after the 'odd' one, paste the background slide (merge with background), copy over any other elements from the 'odd' slide...then delete the odd slide.
There is an option to capture tool-tips or not, I believe, in the capture setup/preferences...

Problem with multiple output for software simulated project

When a software simulated project in captivate is published more than thrice, the output is not generated properly, i.e not in-line with the project. Is this a problem with my system or due to some settings in captivate which is not activated?

Thanks for the suggestions Malcolm,
They're very handy app's for sure, but unfortunately they didn't fix the problem.
Detour DID overide the routing for iChat's general bleeps & noises, but not the audio stream from video conferences (which is the problem I want to fix).
If anyone has any other suggestions for fixes, I'd appreciate it!
Thanks again,
Jason

Published software simulation not displaying correctly when published

Hello,
When viewing a Captivate 6 software simulation either through the Preview mode or when published, screens will 'break up' at different points - part of the previous screen will stay in view when it moves to the next screen. This doesn't happen for the first couple of times it is viewed, which is a worry as you never know who/when it is going to happen.
Once the projects is copied over to a new blank project it will be fine for a few views and then do the same again - it is not always at the same place.
Does anyone know what may be causing this?
Thanks,

You might try de-selecting the Advanced Project Compression option in the preferences:

Phantom Lines in CP (6.1.0.319) Software Simulations

Does anyone else have a problem with phantom lines showing up in their published CP software simulation slides?
They don't display in my previewed copy, but do in the published SWF... and only in my software simulations, not in non-recorded slides.
To see what I'm referring to, here are two screen shots. The first one shows (SWF) the phantom lines and the second one (preview) with without any phantom lines.
(LINES)
(NO LINES)
Any suggestions for correcting this problem?

These are usually caused by Captivate compressing the SWF file. You can try Edit -> Preferences-> Swf Size and Quality, an de-select the compression options. Then republish.

Cannot change slide duration in software simulation

I'm using Captivate 7 for the first time. I had a much older version, but seldom used it.
I have recorded a simple software simulation that should be a piece of cake to edit and produce, but have come across a problem I don't know how to solve. The simulation includes an item on screen being clicked, then dragged and dropped into a new location. I cannot edit the duration of the slide that shows the drag-and-drop motion. It has a duration of 6.5 seconds, which is painfully and unrealistically slow and there is no way I can find to shorten it.
I can't drag the end of the slide on the timeline, right-clicking hasn't produced anything promising in pop-up menus, and the Properties panel has a Time field, but when I select the 6.5 seconds and change it, it just reverts to 6.5 seconds immediately afterward.
I recall this sort of thing being very simple in previous versions of Captivate. Not anymore, I guess...
Thanks,
- Jennifer

Thanks, guys! Those replies led me to try something that actually worked. It did record as a video demo (the red strike-through line) as Varun Kalra suggested. I discovered that I can click the end of the timeline for that slide (where the word END displays), then use the left arrow on my keyboard to decrease the duration of the slide.
That probably wouldn't work if the entire animation was too slow, but in this case, just the very end was too slow.
Thanks much!
- Jennifer

Software simulated digital to analog conversion of signals

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