Bu-353 Lag

silv3rman · 05-24-2007, 06:02 PM

Hello. I am running iGuidance 3.0.1 with a BU-353. The lag is around 5 seconds, meaning I pass a street and 5 seconds later my GPS shows me passing the street. I have read that if reset the GPS using Sirfdemo then it fixes the lag. When I run Sirfdemo I am unable to switch to "sirf signal" therefore unable to do anything. I have tried switching around the bps but it will only work on the 4800. Is anyone familiar with this? If it helps I am running XP Pro. Thanks.

DarquePervert · 05-24-2007, 09:37 PM

What hardware are you running?

I'd be willing to bet that it's more the map software that's lagging due to slow hardware, not the GPS.
I could be wrong....

silv3rman · 05-24-2007, 10:05 PM

It's running on 512MB RAM, MII1200, 1.2GHz processor, 250GB hdd. That would make sense I suppose... now that you mention it sometimes music is a little slow but I thought it was always due to the amount of songs I have, maybe not. I'll try to remove some services and see how it goes. Thanks.

Curiosity · 05-24-2007, 10:42 PM

There's something wrong with the BU-353 if it can't switch baud rates or switch to sirf mode. Someone else did a factory reset in Sirfdemo and fixed the delay, so try that. Then try to switch to SiRF and back to NMEA at a different baud.

silv3rman · 05-25-2007, 09:46 AM

Hmm. Curiousity, do you know how to do the factory reset in Sirfdemo? The only real option I have is to "initialize source" which has a reset button that I click but I don't see any changes happening. I'll take another look on google to try to find out how to reset but if anyone knows please...

Curiosity · 05-25-2007, 10:43 AM

I think it's that "Initialize Data Source" which has factory reset selected, and then you hit the "Send" button.

Sonicxtacy02 · 05-25-2007, 10:57 AM

good luck with that.. that fried my first bu-353

. never went back into nmea again.

GiODi · 05-25-2007, 11:19 AM

I think I may have fried my BU-353 by trying this as well. Sonicxtacy02.... you had to replace the unit?

Nerd2 · 05-25-2007, 11:55 AM

sirfdemo is a tricky program to use - chances are your bu353 isn't fried, but that you switched back to nmea at the wrong baud, or something like that. Keep going, have a fiddle. This happened to me...

Sonicxtacy02 · 05-25-2007, 12:06 PM

Quote: Originally Posted by GiODi

I think I may have fried my BU-353 by trying this as well. Sonicxtacy02.... you had to replace the unit?

Yes i had to replace the unit.

Quote: Originally Posted by Nerd2

sirfdemo is a tricky program to use - chances are your bu353 isn't fried, but that you switched back to nmea at the wrong baud, or something like that. Keep going, have a fiddle. This happened to me...

I tried every baud setting... it go to the point where it wouldnt even return to sirf mode.. so i sent it back. I dont mess with sirfdemo now unless its a very LAST resort.

Curiosity · 05-25-2007, 04:19 PM

Maybe there was something wrong with it in the first place and you just made it worse? Usually you can hit "Synchronize Protocol & Baud rate" and it will try everything to figure out what's being output by the GPS. If that doesn't work, then it's most likely bad.

Marvin Hlavac · 05-25-2007, 04:57 PM

Quote: Originally Posted by Sonicxtacy02

Yes i had to replace the unit.

That might have not been necessary. I think these units have an internal battery. If you don't use the receiver for an extended time (if it is unplugged from USB), then eventually the battery will discharge itself. The next time you use the GPS receiver, the unit should go into factory settings. I'm not sure about BU-353, but batteries in some other receivers may take even a couple of weeks to discharge :-)

Sonicxtacy02 · 05-25-2007, 05:07 PM

Quote: Originally Posted by Marvin Hlavac

That might have not been necessary. I think these units have an internal battery. If you don't use the receiver for an extended time (if it is unplugged from USB), then eventually the battery will discharge itself. The next time you use the GPS receiver, the unit should go into factory settings. I'm not sure about BU-353, but batteries in some other receivers may take even a couple of weeks to discharge :-)

i opened it and removed the battery for about a week lol. Made no difference. I think the previous poster was right... i might have been doomed from the start.

silv3rman · 05-25-2007, 06:43 PM

Well, I would give you an update, but my computer all the sudden shut down. It's completely dead. The hdd is not even recognized by bios. Talk about luck... I did use iGuidance to find a gas station and get me back onto 95 and I love it. Now I'm trying to figure out why it died.................................... I'll post in here if I still have the lag after I reinstall.

NickN · 08-15-2007, 08:26 PM

I am having this same problem in iGuidance v4.0 with my bu-353, 5 second lag on the map. My hardware is more than capable running a intel mac mini