I think the qstarz 818 uses the surf star 3, not sure on that one though. I have one receiver here that uses that, the globalsat 359 I think it is, seems to work really well, though not as accurate as the MTK receivers. That's interesting that you mentioned updated firmware for the receiver, is that common? I have never seen new firmware for any of my receivers, so I wonder if that happens frequently.
On Mar 2, 2009, at 11:50 PM, Kevin Chao wrote:
It would be interesting to see your thoughts on the qStarz 890. Prior to using the Holux M-1000, I was asked to test the qStarz Q818. This receiver looked excellent or even better than the Holux M-1000 on paper. However, when putting the receiver to test while walking, it was more lacking in this area as there were speed issues, heading issues and tracking issues. There were a number of times where it reported I was walking at above 100 MPH,incorrect and inconsistent heading and position information. The issuewasn't that much of an issue after firmware made by qStarz but they werestill there when walking below 3.3 MPH/5KMH.As far as the update frequency, this tells how the receiver how often to update information, such as position, speed and heading, which are the main components of a GPS receiver. With the default setting of 1HZ, this tells the receiver to give speed, heading and position information once a second, where 5HZ tells the receiver to get this information five times a second. Determining the best setting will depend on if the receiver is giving good or bad data in all variants, which varies from walking to above 500 MPH. If the data is quality then it would be better to have a higher refresh rate. This is most useful when using the Sendero GPS as there are different ways the heading can be averaged, such as Instantaneous which takes the raw value at once a second. It will take the best value within the five values thatthe receiver took in during that second.-----Original Message----- From: gps-talkusers-bounce@xxxxxxxxxxxxx [mailto:gps-talkusers- bounce@xxxxxxxxxxxxx] On Behalf Of Mike Arrigo Sent: Monday, March 02, 2009 5:25 PM To: gps-talkusers@xxxxxxxxxxxxx Subject: [gps-talkusers] another new GPS receiver Hi all. Well, I will be adding another GPS receiver to my collection, I think this one just came out recently. It's made by qstarz, and Ithink the model number is the 890. It uses the new MTK 66 channel chip set, so it should be really good, if it's anything like the global topg66 which also uses the same chip. This new receiver does have aninteresting feature, and I'm wondering if anyone has heard of this andif so, what it means and what the best setting is. You can set the update frequency to either 1 HZ or 5 HZ. I would assume 5 is better, but does anyone know what that actually means, and does it change the accuracy or the results you will get? Looking forward to getting this one and taking it for a walk or a drive.
