Thread: Garmin Mobile PC - Updating only once a second (ie Jerky)

It seems that alot of you are not understanding that Garmin's system reacts dirfferently than iguidance there maps dont flow the same as garmins you will get a better response if you have a gps receiver than can be set to different rates. the problem isn't the software the problem is the gps receivers its like trying to run a windows program oa a mac you can do it if it is tweaked like if you run wine my gps receiver works better with Garmin than with other programs but its not the programs its my receiver.

yeah, just to reitterate what dejan and biggkatt have said. I was running a 1Hz receiver (BU-353). upgraded to a 5Hz receiver and its heaps better. The only thing is, the Garmin baud rate on a usb port seems to be fixed at 38.4kbps, so i have to run mine over bluetooth where the baud is 115.2kbps. Otherwise it simply doesn't detect the receiver.

Originally Posted by bambam

That may be so but, iGuidance AND Streets and Trips display perfectly without jerkiness and both "ding" exactly on time. In fact, I remember trying Delorme and that worked great to. Blame it on the receiver all you want but the fact of the matter is that all the gps software I tried with the BU353 work perfectly EXCEPT Garmin....draw any conclusion you want from that statement but it seems obvious to me....

If you read again what we are write you will see that only better GPS device(With 5Hz) will fix this. Why? Because GMPC show/write your position from real GPS position, so I will explain this.
You gave GPS positions A, B, C, D, E, F which you receive every second(Because you have 1Hz receiver)
GMPC:
receive position A -> show you on position A
receive position B -> show you on position B
receive position C -> show you on position C
receive position D -> show you on position D
receive position E -> show you on position E
receive position F -> show you on position F

So you see real position on time, and with 1Hz receiver work "jerky"
iGo or any other software:
receive position A -> do nothing
receive position B -> show you on position A and moving you to position B
receive position C -> show you on position B and moving you to position C
receive position D -> show you on position C and moving you to position D
receive position E -> show you on position D and moving you to position E
receive position F -> show you on position E and moving you to position F

And you see your position like normaly moving...

Get a GlobalTop G33 Bluetooth GPS (51ch. MTK chipset, 5Hz)
It updates at 5Hz and is only $46 on ebay. It works perfectly in software that allows
higher than a 1 Hz refresh rate. For software that only allows a 1Hz refresh rate, the updates will still be more accurate.

A few weeks ago I tested Garmin Mobile PC w/5Hz receiver. The difference was immediately noticeable. The map movement was smoother. Would I recommend someone throws away a perfectly functional 1Hz unit? No. But 5Hz + Mobile PC is nice. If you are in the market for a new hardware, you may consider 5Hz.

By the way, I'm back to using my old 1Hz BU-353 - and I'm content with it. I gave away my 5Hz receiver to a member of my forum, so he can play with it now.