GPS Time

Information about using GPS units with motec devices

GPS Time

Postby jeffrey on Mon Jul 13, 2015 1:19 am

Hey,
can i know how to correct the GPS Time , in my CDL3 the GPS Time is 8 hours less than my real time .I really want to know how to make it .Thanks
Say thank you first in advance of you answering this question
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Re: GPS Time

Postby stevieturbo on Mon Jul 13, 2015 11:36 pm

Not Motec related, but on a couple of other GPS devices, one being a VBox it's the same It seems to read GMT all the time, and dont see an easy way to change.
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Re: GPS Time

Postby adrian on Tue Jul 14, 2015 9:11 am

The world wide GPS uses UTC so you would need to convert it to your local time zone. The CDL3 does not have the Advanced Maths functionality that would be required to convert the time from UTC to a different time zone.

The only way you could do it is with the maths in i2 Pro which would require the Pro Analysis upgrade in the dash.
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Re: GPS Time

Postby jeffrey on Tue Jul 14, 2015 1:06 pm

hi, adrain
and how can i make it correct by i2pro,the actual steps?
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Re: GPS Time

Postby adrian on Tue Jul 14, 2015 1:57 pm

GPS time is a single number in the format HHMMSS.sss. So for instance if the time is 2:30am the GPS Time channel would be 23000.000. So if you were adding 8 hours you would add 80000 to give you 103000.000 or 10:30am. You will of course have to take into account roll over at 23:59:59. You could do this via the choose function and some of the additional built in functions.

The other option would be to code it in VB or C++ and import it as a plugin. This method would probably be much easier as there is a lot more flexibility when you are directly coding the algorithm rather than trying to use built in functions. I have attached a document that details how to make a maths function.
Attachments
DTN0008_Creating_an_i2_Math_Function.pdf
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Re: GPS Time

Postby jeffrey on Tue Jul 14, 2015 2:02 pm

Wonderful, the document is very useful. May I know how can I find this kind of help document ,or something like DTN****?
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Re: GPS Time

Postby adrian on Tue Jul 14, 2015 2:21 pm

These sort of documents we give out as requested.

You can always post on the forum or email support@motec.com.au if you need help with any of our products.
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Re: GPS Time

Postby jeffrey on Wed Jul 15, 2015 12:05 am

And one more question , how can i get the i2 pro , it does not get the logged form the CDL3 ?
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Re: GPS Time

Postby adrian on Wed Jul 15, 2015 9:06 am

Do you have the Pro Analysis upgrade for the CDL3?

To check, connect your laptop to the dash and in CDL3 Manager go to Online>Dash Options (Upgrades).
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Re: GPS Time

Postby jeffrey on Wed Jul 15, 2015 6:05 pm

Now I have the pro analysis upgrade for the CDL3, but it still is Std logging.
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