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 21 
 on: January 24, 2014, 05:15:21 pm 
Started by dusteel - Last post by Rando
C'mon, $10 for the mount and $10 for the shipping! (in the US) the whole thing should be $10 shipped. I use the original mount on the bike that I ride most and one of these rubber bands ($1.40 shipped) when I use it in any other bike. http://dx.com/p/68460

 22 
 on: January 24, 2014, 05:14:48 am 
Started by Dmac - Last post by Dmac
I have been using this watch for the last 3 years, usually once a week when we do our jungle trek/run. Most of the time I do wash it under the tap after I get back and did not have any problems. I used the watch on Monday and fortunately it did not rain. As mentioned before, the distance appears to be correct but the attitude reading is wrong. Guess I just have to live with it. By the way the start/stop cover broke off. It is now taped back to the watch but it works.

 23 
 on: January 21, 2014, 01:02:49 pm 
Started by Dmac - Last post by USG_TECH9
Hello Dmac,

Sorry to hear about your watch problems. The GH-625M has an IPX7 rating, so running in the rain shouldn't be a problem. If moisture leaked into the display area, then there might be a compromise on the seal around the display. How long have you had the GH-625M? And where did you purchase it from? It might be covered under warranty, if you purchased it from an authorized reseller & it was purchased within a year. If it's not, then your best bet would be use the blow dryer and the sun and see if that helps revive your watch.

Thanks.

-Jesse

 24 
 on: January 21, 2014, 12:55:12 pm 
Started by pmuyter2014 - Last post by USG_TECH9
Hello pmuyter2014,

I'm not that familiar with how to use a BU-353 as a time source, but I can try and help resolve your issues.

Quote
1) I use the time and date from the GPRMC message, and relate it to the timestamp of the '$' character in the previous GPGGA message, which has the same time information, using a program in the highest priority on my linux boxes.  Is that the right way to do ?
That sounds like it should work. Have you tried referencing just one NMEA sentence instead of looking at two different ones?

Quote
2) I have noticed that the messages do not come regularly every second; they are frequently delayed, and sometimes are even delayed by many seconds.
Each NMEA sentence will output every 1 second. For example, the RMC sentence will output every 1 second and every GGA sentence will output every 1 second, but they output every 1 second independently from each other. At least that's how I understand it. Are you seeing something else?

Quote
3) When I take only the time given by the gps receiver for messages that came "in time", and compare it to a stable ntp source, I notice that the difference decreases over time, and then is reset to an initial value, then decreases over time with the same slope, then is reset to the same initial value and so on, giving a sawteeth graph, with a quasi-constant period.  Each gps receiver exhibits the same behaviour, but with a different period.  The time jump at the reset seems to be the same for all gps receivers: about 100 ms.
I'm not sure exactly what kind of time accuracy you can get out of a device like the BU-353. But from my understanding, the BU-353 is not designed for precise time accuracy. If you're looking for more precise time, then I would suggest a device like the MR-350P-S4, which has a 1PPS output synchronized to GPS time: http://www.usglobalsat.com/p-713-mr-350p-s4-bulkhead.aspx

Let me know if you have any further questions. Thanks.

-Jesse

 25 
 on: January 20, 2014, 11:00:27 pm 
Started by dusteel - Last post by dusteel
It seems very similar to me, any one has the info if they are realy compatible or not?

 26 
 on: January 20, 2014, 08:39:46 am 
Started by dusteel - Last post by dusteel
Exactly that =D

How can i purchase this one? there are no link to make a buy..

 27 
 on: January 17, 2014, 03:58:05 pm 
Started by dusteel - Last post by USG_TECH9
Hello dusteel,

What specific part are you referring to? There's no "computer mount" for the GB-580. Are you referring to the Bike Mount? If so, you can purchase the Bike Mount here: http://usglobalsat.com/store/p-729-gb-580-bike-mount.aspx

Thanks.

-Jesse

 28 
 on: January 17, 2014, 02:21:03 pm 
Started by dusteel - Last post by dusteel
Can someone tell me where can i find a replacement for the computer mount?

 29 
 on: January 15, 2014, 02:48:09 pm 
Started by DEPOM - Last post by DEPOM
This is what Sporttrack say's

Quote
We've seen this problem with registry corruption.
Run this program to clean any problems you have in your registry:

http://zonefivesoftware.com/tools/util/clean-sporttracks3-registry.reg

Reinstall the application.
Now you should be able to double-click a plugin to install.

now it works

 30 
 on: January 14, 2014, 04:06:57 am 
Started by pmuyter2014 - Last post by pmuyter2014
Hi,

I use many BU-353's (sirf iii) as time source, in their out of the box mode, at fixed locations, each one for a different computer, but I have several problems :

1) I use the time and date from the GPRMC message, and relate it to the timestamp of the '$' character in the previous GPGGA message, which has the same time information, using a program in the highest priority on my linux boxes.  Is that the right way to do ?

2) I have noticed that the messages do not come regularly every second; they are frequently delayed, and sometimes are even delayed by many seconds.

3) When I take only the time given by the gps receiver for messages that came "in time", and compare it to a stable ntp source, I notice that the difference decreases over time, and then is reset to an initial value, then decreases over time with the same slope, then is reset to the same initial value and so on, giving a sawteeth graph, with a quasi-constant period.  Each gps receiver exhibits the same behaviour, but with a different period.  The time jump at the reset seems to be the same for all gps receivers: about 100 ms.

What can I do, without changing the hardware, to get a better time accuracy and stability ?

Thanks in advance

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