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Garmin Mobile PC (Problem Acquiring Satellites)
claydog422
I've got Garmin Mobile PC 5.00.60. I am trying to use my GPSMAP 76 as the receiver. This is an activated software only version which is supposed to allow other Garmin or 3rd party receivers. I've got my GPSMAP 76 hooked to my Windows Vista laptop via USB to serial cable seeing as my laptop doesn't have a serial port. I have my GPSMAP 76 set to NMEA with a default baud rate of 4800. If i set the GPSMAP 76 to Garmin data output GMPC doesn't locate it at all. With all this being said GMPC does locate my GPSMAP 76 on (com4: serial 2). The only problem is the satellite signal meter on the main screen doesn't show any green bars and when I hit the GPS info button it just says acquiring satellites when my GPSMAP 76 has already acquired a 3D GPS location. Is there something that I am missing? Any help would be greatly appreciated. Thanx
tcassidy
Get a copy of Xport and see if that solves your problems. They may be due to Mobile PC rejecting the ID information from the 76. Xport or GPS Gate can mask that.A link is available in the following thread.

http://www.laptopgpsworld.com/945-google-maps-navteq-out-tele-atlas

Terry
claydog422
This is frustrating. I tried using Xport as suggested and GMPC see's the ports created by Xport but I still get the same results. Xport created com ports 1,2,5: xport 0,1,2. I tried each one of the ports and GMPC located my gpsmap 76 but still doesn't acquire satellites. Is there maybe something that I need to change within xport setttings. The serial to usb cable is working properly it seems because it let me upload maps to my gpsmap 76. I'm wondering maybe it if it could be the serial to usb screwing it up though. I did have my gpsmap 76 hooked straight to a serial port on my older desktop and fugawi could see it and give me my position. Any other suggestions??? Maybe port settings in vista itself????
claydog422
Mentioning the fugawi gave me an idea. I Tried setting everything up on my older desktop that has a serial port running windows xp and i got the same results. Just a little experiment?!?!
Marvin Hlavac
claydog422, is it possible that everything is working just fine, but the GPS receiver simply doesn't have sufficiently good signal to get a fix? Try taking it all outdoor?
claydog422
My gpsmap 76 says its got a 3d gps location or 3d differential so that's enough isn't it. It also says accuracy is within 6.3 ft. But I'll try taking it outside.
claydog422
Took it all outside, same thing. It's picking up 8-9 sats with good signals.
tcassidy
Time to put that 76 back to what is does best and buy yourself a USB GPS device. They are really inexpensive, probaly less than you paid for the Serial-USB converter.If you must continue testing, make sure you try one of the GPS monitoring programs to ensure the NMEA data is truly reaching the computer.

Terry
claydog422
I'm gonna mess with it a little bit more. What gps monitoring program would you suggest. Hopefully one that is not to complicated. Thanks everybody for your help.
tcassidy
I know Earthbridge provides a good display of GPS information received. Probably GPSDiag does too. They are linked in the thread mentioned earlier where you obtained xport.

Terry
claydog422
I'll try the one's that you mentioned. I don't know if you are familiar with navigator, but it could post all the data, speed, lat, long, ect, but you still could not see sat strength or position. Used navigator before I got your reply.
claydog422
I tried earthbridge which seems real similar to navigator and it gave the same data info but no sat info. It's almost like the nmea info sent back to my laptop is missing something. Could it be the slow baud rate (4800). Maybe it's time to call it quits or call garmin. I'm not one for giving up though.
tcassidy
4800bps is fine.Many GPS devices run at that speed and Mobile PC is quite happy with it.

Terry
tcassidy
Here is what EarthBridge looks like monitoring a BU-353. Are you sure you are looking at the right COM port? Are there any other settings on the 76 which could prevent it from transmitting data?

Terry
Attached Images
earthbridge.jpg  
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