rgarjr Posted July 15, 2010 Report Share Posted July 15, 2010 it'll help a lil bit but not a whole lot. Quote Link to post Share on other sites
WilliamG Posted September 27, 2010 Author Report Share Posted September 27, 2010 Yeah it didn't help. I don't understand why I'm so much further ahead on the road than the navigation thinks I am. REALLY FRUSTRATING. Quote Link to post Share on other sites
rgarjr Posted September 27, 2010 Report Share Posted September 27, 2010 just the way it's designed, dude. Don't let it get to you though. Quote Link to post Share on other sites
WilliamG Posted September 27, 2010 Author Report Share Posted September 27, 2010 just the way it's designed, dude. Don't let it get to you though. Just causes me much difficulty downtown... *sigh* Oh well, moving on with life. Quote Link to post Share on other sites
Law-Dog Posted September 29, 2010 Report Share Posted September 29, 2010 I have the same problem, seems like I'm about 300 feet behind on the GPS. That is the only weak point on this unit so far. I have my VSS wire connected and have driven several miles for the learning process. I think Garmin blows this away as far as the GPS, but the VR and the rest of the unit are great. Quote Link to post Share on other sites
VBLUE42 Posted September 29, 2010 Report Share Posted September 29, 2010 I had to put 1K plus on my car before the position indicator got closer to my actual location. It never actually positioned correctly however. And the VR on Garmin is much better then with this unit. Quote Link to post Share on other sites
brianas Posted October 27, 2010 Report Share Posted October 27, 2010 ive found the original n1 unit to have been the most accurate over the years, the rest ive sold and installed over the years have all had this annoying little issue some ahead and most behind it was also the most expensive probably just a fluke oh well, like others said u will get used to it Quote Link to post Share on other sites
RonS Posted October 27, 2010 Report Share Posted October 27, 2010 I notice that sometimes I am behind the plotted arrow, and sometimes I am in front of it. Not sure if it is a directional thing, meaning a constant error in one direction/quadrant. In that case, for example, I would always be lagging the plot when headed East, and always be trailing the plot when headed West. This reminds me of the old days before they turned off Selective Availability (SA). For you young'uns: SA was a technique to reduce the accuracy of unaugmented, single-receiver GPS measurements. This was accomplished by altering (or "dithering") the GPS satellite clock signals, and by modifying orbital elements of the broadcast navigation message. These alterations were done in a coded fashion, and could be removed by authorized users. This alteration caused horizontal positional errors on the order of 100 meters (95%), and varied in a manner that prevented rapid averaging of positional data. BTW, I don't have the reverse signal connected (no BU camera), so I really notice an error after backing out of my garage. The map shows me driving across my neighbor's lawn for a couple of blocks. I'm assuming that the speed sensor and some inertial sensors are using dead reconing for the 30 seconds or so that it takes to get a satellite fix. I guess I should hook-up the reverse sensor. Might as well install the camera too. Quote Link to post Share on other sites
WilliamG Posted December 12, 2010 Author Report Share Posted December 12, 2010 This is still REALLY cheesing me off, even more now since today I finally turned on the navigation voice. Nothing more annoying than being told "Right Turn Ahead" when I'm already MAKING THE TURN! I'm beginning to really hate my Z120BT... Quote Link to post Share on other sites
WilliamG Posted May 16, 2011 Author Report Share Posted May 16, 2011 I assume nobody has any info on how to fix this, yet? Or maybe I'm the only one having this issue? Maybe the Z130BT is better? (doubtful...) Quote Link to post Share on other sites
John Dolan Posted June 29, 2011 Report Share Posted June 29, 2011 I bought the Z120bt last week and just switched it out for the 130. It does the same thing. I was searching about this and found the thread. Quote Link to post Share on other sites
WilliamG Posted July 12, 2011 Author Report Share Posted July 12, 2011 I bought the Z120bt last week and just switched it out for the 130. It does the same thing. I was searching about this and found the thread. Cannot believe Pioneer haven't addressed this issue.... Quote Link to post Share on other sites
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