Announcement

Collapse
No announcement yet.

Diagnostics Screen

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Diagnostics Screen

    In the Forerunner 305 diagnostics screen there is very interesting information. I don´t understand 2 things.

    The first is the reference to "Bravo versión: 204". Anybody knows the meaning of that in a SiRFstar III chip?

    The second is the parameter "XO Drift". Anybody knows what means?

  • #2
    According to http://www.bing.com:
    BRAVO -Operating system version
    Don't know about xo drift
    Phil M.
    myConnect | StravaHeatmap | Instagram
    F201 F205 F305 FR50 310XT 920XT
    nüvi 67LMT

    Comment


    • #3
      Bravo version

      About the bravo software version, my question is "What is the meaning in the Forerunner (Forerunners Chipset is SiRFstar III)?

      XO Drift

      I think XO Drift is a "Xip Onboard" that solves the drift between the satellites clock and the clock of the user. While satellites clocks
      have a very good accuracy and stability (incorporate an atomic clock, which are very precise and very stable), this is not the case for the receivers since their price would be exorbitant.

      Could any Garmin people explain is that is right?

      Comment


      • #4
        I have no idea what a "Xip Onboard" would be, but in this context, XO stands for Crystal Oscillator. The XO drift parameter might show what the frequency error is between the oscillator's frequency and the nominal value.

        In a GPS receiver, the clock offset is estimated (and corrected) by obtaining ranges to at least four satellites. This lets you solve for four unknowns: latitude, longitude, altitude, and time. Having exactly four satellites gives you a single solution. Having more than four satellites gives you multiple solutions that you can then use to determine your probable error footprint.

        Comment


        • #5
          Originally posted by T_SMIT View Post
          I have no idea what a "Xip Onboard" would be, but in this context, XO stands for Crystal Oscillator. The XO drift parameter might show what the frequency error is between the oscillator's frequency and the nominal value.

          In a GPS receiver, the clock offset is estimated (and corrected) by obtaining ranges to at least four satellites. This lets you solve for four unknowns: latitude, longitude, altitude, and time. Having exactly four satellites gives you a single solution. Having more than four satellites gives you multiple solutions that you can then use to determine your probable error footprint.
          Thanks a lot. I think you´re right about Crystal Oscillator.

          Comment

          Working...
          X