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Permalink Reply by David Gitz on January 5, 2010 at 12:35pm

It could be, and would be pretty easy to verify. It would only need 2 connections, one for ground and one for the data line. If you have a O-scope this would be riduclously easy to see but I'm assuming you don't based on the post. So you're going to (I assume) setup a ttl > rs232 transceiver for a serial port on a computer, start hyperterminal with 4800-N-8-1 and see what you get. If you get "$G" or something similiar on the output of one of the lines you are good to go. If you get data but it isn't readable the baud rate might be 9600 or something different (maybe) or the output line might be logically inverted (maybe). The second would be more difficult to verify but sometimes you can find this in one of the settings of the device or you can do a hexdump to a dos prompt and there is probably a program online that could convert it for you. Or, since I assume you eventaully intend doing somethign with a microcontroller you could do that in your program as well. Good luck!

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Permalink Reply by Xcluzif on January 5, 2010 at 12:45pm

My father have a O-scope. How do I check with the o-scope if it's a nmea output ?

thanks for the help

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Permalink Reply by David Gitz on January 5, 2010 at 1:43pm

Connect the ground on the scope to a ground on the device. Probe each line on the connector until you see a pulse coming out of it, you should see something I would think. Look at the voltage of the signal, if its +/- 12 V or about it is a RS232 signal and you can probably hook it right up to your computer. When they do this on these devices its to aid in troubleshooting at the factory. It is probably +5/0 V though. For more information google RS232 and look at the wikipedia page.

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Permalink Reply by Xcluzif on January 6, 2010 at 2:11am

ok thanks, I'll check it later this week.

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