Can digital and analog channels be simultaneously accessed

Hi,
Is it possible to simultaneously access digital and analog channels on
a Multifunction DAQ (such as NI-4351) by issuing commands from parallel
threads using LabWindows/CVI (5.5.1)?
John.

Hi JAH,
I have no experiance with this product, so can not give you a definative answer.
The best I can do is to suggest you try it, if it does not work then you most likely can not do what you want.
Also what version of the driver are you using, I have checked the
download page and version 2.1 only works for CVI 6 or higher and LV 7
or higher.
Regards
JamesC
NIUK AE

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If you are using a STB, then you should connect it with an HDMI cable or component cable as you did.
However, you do not need to autoprogram your TV if you are using an HDMI or component or composite or any other indirect connection. That is because the STB is acting as the tuner; it will automatically receive channel information as part of its on-screen graphics. All the HDMI connection is doing is delivering that video feed to your TV.
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Digital and analog in at the same time

Hello Group,
how do I simultaneously and synchonously aquire (read) data from digital and
analogue channels? In the Manual there are just chapters for aquiring one of
both at a time and I also can't see a function in the menu for that.
Thanx
Frank

Frank,
Depending on the DAQ hardware you have you may have issues with simultaneously acquiring data even on your analog channels. Our MIO (Multifunction Input/Output) DAQ cards have one analog to digital converter (ADC) and a multiplexor is used to scan all of the input channels. There will be a slight interchannel delay and you will not have truely simultaneously acquired data (loss of phase will occur). In order to perform true simultaneous acquisition you will need one of our SIO (Simultaneous Input/Output) cards.
Furthermore, our DAQ driver, NI-DAQ, is not multithreaded. Meaning, you have to pay close attention to what calls you make into the DLL, or to what VIs you are using, if LabVIEW is your development environment. For instance, AI_Read is
a blocking call, meaning if you ask for 10 bytes of data it will block all other calls until 10 bytes have been acquired. So even if you write a multithreaded application to perform analog and then digital acquisition you will have to not ask for so much that you will be blocking for great periods of time.
I agree with Ben's comment that one solution would be to pass your digital inputs to an analog input and use a SIO card to simultaneously acquire data. However, depending on what these DIO inputs will be used for this may not be a suitable option for you.
Regards,
Justin Britten
Applications Engineer
National Instruments

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.
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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?)
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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
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Array of different (digital and analog) values into multigraph

Hello everyone,
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http://digital.ni.com/public.nsf/allkb/21E8163F259DA2058625703B007511AA
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http://zone.ni.com/reference/en-XX/help/371361L-01/lvconcepts/customizing_graphs_and_charts/
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Optical digital and analog audio out

I just purchased a Pavilion 500-214 with IDT High Def Audio CODEC / DTS Sound+
Is it possible to get both opitcal digital audio out and analog (speakers/headphones) out at same time? Stereo amp needs access to both for multizone/source function. I can manually pick one or the other before playback - it is clunky in that when switching audio out devices the active will turn off but one switching to does not always turn on. But i really need both simultaneously active for amp to work properly. I have also found rear speaker jack to be more stubborn during switching than front headphone jack.
This question was solved.
View Solution.

Hi zombi1,
Welcome to the HP Forums!
I have done some research on whether or not one can utilize both digital or analogue audio out at the same time, and unfortunately this is not possible.
Thank you for posting, and Happy Earth Day!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

Need quick help, please!!! How do I scan the counter and analog channel in parallel, synchronized?

Hi,
I'm using LabView6.1 and a PCI6014 DAQ card.
I have to scan simultaneously an analog channel and the counter on the card. My project requires me to measure in parallel a force (a voltage on an analog channel) in correspondence to a distance (measured with a counter) and I have to display a force-distance graph.
So, can someone please tell me how can I program the counter and an analog channel to take 1000 measurements in parallel, and then, by reading the buffers to have two sets of corresponding measurements?
I've tried some things and I've got only an error message, that says that there is no free DMA channel available (the error comes from configuring
the analog channel). I attached one of these programs that gives this error, maybe somebody can tell me what I do wrong.
If somebody could send me an example (in LabView6, I have no 7 :-( ), I would be grateful.
Thank you,
pixooxiq
Attachments:
Scan_Test_4.vi ‏177 KB

Hi pixooxiq,
unfortunately, your Card has only one DMA-Channel.
If you want to use two Channels simutaneously, you have to tell one of them to use an Interrupt instead.
This option can be set with the "Set DAQ Device Information.VI"
Just see the Bitmap, I've attached.
Perhaps, you now get Performance-problems, cause the IRQ does not directly write the Data but involves the CPU. In this case the only possibillity is to use an other card with more than 1 DMA-Channel...
Regards
Peter Weber
NI Germany
Attachments:
Interrupt2.bmp ‏159 KB

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1) can the analog signal be recorded and used as the trigger?
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Thanks in advance for your help,
-Drewksi

Hi Drewski,
You can use the APFI0 line as an analog trigger for your signal. However, in this case you need to connect your analog signal to both the analog channel you want to acquire at and the APFI0 line.
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Z77a GD65 simultaneous audio output via digital and analog jack?

Hi,
Does anyone know if it is possible to use the digital audio spdif out, and the green 3,5mm jack (I use it for my headphones) at the same time?
When I use the digital out, and I run a 'test' with the analog out, I can hear the test signal so technically it should work.
However, I can't find the right settings to actually use both outputs (same source: for instance iTunes) at the same time.
Any advice? Thanks in advance!
Regards,
Jeroen

My old msi cuba 7301 from 2007 has an spdif output, and I was able to use this digital out together with the 3,5mm line out (which I used for my headphones) simultaneously. I understand what you're saying, but I'd say the user should decide in what way he/she wants to use the product . Technically, it shouldn't be a problem, since I can hit the 'test' button and hear the sounds through my headphones via 3,5mm stereo out, while playing music through the digital out.
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Thanks for your answer

Simultaneous digital and analog with pulseaudio [solved]

Goal: have pulse audio output audio over HDMI and through line-out.
I found this thread which details two potential solutions to this problem. The more complex one isn't appealing to me, but the simplistic one quoted below is... but I can't seem to get it to work.
doorknob60 wrote:
Or easier solution this should work: open paprefs -> Simultaneous Output tab -> Check the box -> Switch to the virtual device in gnome's settings or pavucontrol
That's what I do to simultaneously output to my speakers and to HDMI, so I'd assume it would work for you too, even though you seem to have already figured it out.
Is anyone successfully doing it? My problem is that within pavucontrol>playback I cannot seem to select both the analog and hdmi sources. For example, I have mplayer playing a movie (should be HDMI) and mpd playing music (should be analog). My only two options under pavucontrol>playback are:
*Internal Audio Analog Stereo
*Simultaneous output to Internal Audio Analog Stereo
I have no option for HDMI.
Last edited by graysky (2012-02-09 00:44:53)

Got it! The key was understanding that whatever is selected in the GUI is the default device. I therefore selected HDMI as the device and added the following to
/etc/pulse/default.pa
### Load analog device
load-module module-alsa-sink device=hw:0,0
load-module module-combine-sink sink_name=combined
set-default-sink combined
After a restart of pulseaudio, I simply went into pavucontrol and defined which program would use which device. I'll update the wiki with these when I have some time. Thanks to doorknob60 for his original post.
EDIT: https://wiki.archlinux.org/index.php/Pu … log_Output
Last edited by graysky (2012-04-25 22:45:43)

Airplay: stream digital and analog simultaneously

Hi,
My future set-up:
Living room (at the moment): AppleTV with digital optical out to receiver.
Kitchen (open, connected to living room): Airport Express with analog out to amplifier (still to buy).
Streaming digital audio always takes a bit longer than analog. Will I be able to stream music from my iPhone to both living room and kitchen at the same time, without my music being out of sync?
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Jef

For me Airfoil from Rogue Amoeba works good. Macmini + ATV3 + Airport Express analog. Also from Spotify.
Have to check streaming from IPhone.

Connecting 5700 with laptops' only digital AND analog output

Hi everyone!
Although I'm an experienced creative user this is the first time I'm posting. I looked trough the forums but I couldn't find any answer to my question and I hope this is not the "n"th time it is asked...
I have Inspire 5700 Digital speakers and I recently bought a Sony VAIO VGN-FES laptop, with an Intel 945PM Express chipset, which features Intel HD audio. In the sound setup utility of Sigmatel HD audio, there is even an option to enable digital SPDIF output, which I enabled. But when I connect the digital din cable to my laptops only output jack (headphones...) I have no sound at all...
I thought that it may be due to the fact that the jack is not digital only. But I still want to have real digital 5.1 audio. So could anyone tell me how I can do that?
Thanks beforehand!

Addlclove,
in the sony forums the answer I recieved was that the headphone jack was normally 2.1 analog, but I didn't receive a fulfilling answer to my query about the reason to the spdif setting in the setup utility and the chipsets features. That's why I came here The only output I have on the computer is the one for the headpohes. But there is a docking station that I could buy, having an optical out.
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How to use both digital and analog input modules in the same worksheet - MCC USB1208LS

Dear all,
Hi, I am Imran. I am using MCC USB1208LS. I have created the worksheet using digital input module as below and able to execute (run).
But when i add another analog input module in the same worksheet and executes, An error Message pops-up as in the below image
I have connected temperature sensor sognal to the analog input of USB1208LS. When using analog input alone in the worksheet, it indiates the actual values.
is any black box solve? please guide me. I am attaching in images
We already placed a purchase order for USB1208FS. Will it sort out my issues?.
Thanking you,
Imran Mohamed.
Attachments:
present worksheet digital input only.JPG ‏67 KB
with analog input module.JPG ‏81 KB
error menu.JPG ‏77 KB

Hello Imran,
the USB-1208LS is not capable of running concurrent operations such as an analog input scan and ANY digital Ins, Outs, counter reads, or analog outs. In Dasylab, the 1208LS is scanning, and nothing else from that particular device can be requested of it while that is happening.
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Please refer to the ULHELP.CHM file installed on your computer in c:\program files\measurement computing\daq for details on this issue, et al.
also I recommend you send your MCC/DASYLab requests for support to [email protected] as MCC staff (that includes me) does not normally monitor NI's Developer Zone.

What are the separate "digital" and " analog" cable (or wires) for that connect inside pc c

, you know the ones I mean. They go from the cd/dvd rom dri'ves and then to, in my case the SB audigy 2 card.
Can someone tell me if they are needed, what they are used for if they ARE needed and the diff. between the analog and digital functions of the wires?
And anything else abou them, because I used to use them be then stopped and I dont see any loss in functions of my computers sound!!!

Mattyboy,
If you are using XP or 2000 then these cables are no needed. If you are running earlier versions of Windows, then you need these connecters for you to get CD Audio and DVD Audio to the sound card.
Jeremy

Can digital and analog channels be simultaneously accessed

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