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LABJACK for delaying and routing analog signals


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#1 delared

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Posted 11 December 2013 - 10:10 AM

Hi All,

 

I'm new in this forum and I need your help.

I have a number of devices which communicate to each others through analog signals.

what I'm looking for is a mediator device (LABJACK) bywhich I can interface my devices as shown in the attached fig.

 

To be clear,  with the LABJACK device I should be able to:

 - routing received signal from one device to another

 - delaying some signals

 - using a software interface to control the LABJACK device and perform the desired specifcation.

 

my questions:

- what's the good LABJACK device for my application

- how can I use it, if there are some docs to facilite my application

 

Regards,

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#2 LabJack Support

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Posted 11 December 2013 - 10:29 AM

What are the voltage ranges of the inputs and outputs?  0-5V?  +/-10V?

 

How fast do you need to acquire data from the inputs?

 

What sort of range of delays do you want?



#3 delared

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Posted 12 December 2013 - 04:14 AM

LabJack Support,

 

- The voltage ranges of the analog inputs is +-10V.

- For the voltage ranges of the analog outputs +-10V (it's okay if there are just 0-5V)

 

I need at least :

- 12 analog intputs

- 3 analog outputs, (I'll be so glad if there are more .e.g 6 analog outputs).

 

I'm waiting for your answer admin :)

Regards



#4 delared

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Posted 12 December 2013 - 04:28 AM

... the rest of the response:

 

"How fast do you need to acquire data from the inputs?"

>> The analo signal frequency is about 24 KHz.

 

"What sort of range of delays do you want?"

>> I'm looking for the controller by which I'll be able to delay some routed signals in real time (during the specific instantace, etc)

The delay couldn't exceed 25µsec.

 

Hope that helps. 

 

 

 



#5 LabJack Support

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Posted 12 December 2013 - 05:40 PM

A quick answer is that every you describe is too fast for a LabJack.

 

    - Inputs:  Say you want at least 100 samples/cycle.  If your max frequency is 24 kHz, that means you need 2.4 MSamples/second per channel, so for 12 channels you need 28.8 MSamples/second.  The T7 is our fastest device at 100 kSamples/second.

 

    - Delay:  If it can't exceed 25us, I'm guessing you want perhaps 1us resolution on the delay.  Input to output delays with USB/Ethernet on Windows are on the order of 1ms.

 

    - Outputs:  Again with the criteria above you need 2.4M updates/second, which is way beyond what any LabJack does.




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