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DI-148U Sample Speed Issue   Message List  
Reply | Forward Message #663 of 794 |
Re: DI-148U Sample Speed Issue

148U can run much faster than 240 s/s

NewData event is fired when there at least <EventLevel> amount of
data, you may be getting 50-60 events, but each event has more than 1
data point


--- In ultimaserial_group@yahoogroups.com, "drake_ns" <drake_ns@...>
wrote:
>
> Hello everyone. I'm currently using UltimaSerial 3 in VB.Net with my
> DI-148U, and am running into a bit of trouble. Now, I'm not a
> programmer by any stretch of the imagination, so I'm sure my methods
> could be done simpler and shorter, but anyways…
>
> Long story short, I want to read in Analog samples as fast as
> possible. The strange thing is, even though my ChannelCount is set to
> 1, the EventLevel is set to 1, and the SampleRate set to 240 (which I
> am assuming is maximum for the DI-148U box), I appear to only be
> getting 50-60 samples per second.
>
> Even using the very straight-forward sample VB.Net project from the
> UltimaSerial website, that is as fast as it will go. Any ideas on
> what may be causing the slowdown? Or am I wrong in assuming that the
> NewData sub starts every time a new data point is read in when the
> EventLevel is set to 1?
>
> Thanks again for your time!
>





Sun Mar 2, 2008 3:01 am

ultimaserial
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Message #663 of 794 |
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Hello everyone. I'm currently using UltimaSerial 3 in VB.Net with my DI-148U, and am running into a bit of trouble. Now, I'm not a programmer by any stretch...
drake_ns
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Feb 29, 2008
10:28 pm

148U can run much faster than 240 s/s NewData event is fired when there at least <EventLevel> amount of data, you may be getting 50-60 events, but each event...
ultimaserial
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Mar 2, 2008
3:01 am

My apologies for such a delay in replying, but I suffered a recent hard disk crash and have had to spend the last week recovering. Anyways... This is becoming...
drake_ns
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Mar 9, 2008
7:36 pm

1) To control digital output, please download digital_dac_output.zip in the file section of this group 2) To read just a single data point, please refer to the...
ultimaserial
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Mar 10, 2008
12:08 pm

Yes, that is pretty much what I have been doing. The main issue is finding the properly long "some delay..." that gives the device enough time to get a new...
drake_ns
Offline Send Email
Mar 10, 2008
5:05 pm

The USB device driver can't send out digital output command as fast as you wish. You may consider using a pulse generator if you need to send out pulse rate...
ultimaserial
Offline
Mar 10, 2008
5:12 pm
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