de Roode Lantaarn Geplaatst 4 juni 2007 Geplaatst 4 juni 2007 Gebrui nu de roker toets Druk rechts om op de pijltjes (boven - echts - onder - links) en je komt in het volgende menu. Ook voor niet rokers geschikt. Weetje ook dat met het eerst genoemde menu je de pix kan testen ( of deze allemaal het nog doen!!!). en de knoppen. suc6 en pas op voor rode oortjes Piet En hoe testen we de pixels dan?
de Roode Lantaarn Geplaatst 5 juni 2007 Geplaatst 5 juni 2007 Sjonge jonge wat zijn we weer goed wakker om 08:13. Het was natuurlijk ook wel een inkoppertje.
rwvdknoop Geplaatst 2 juli 2007 Geplaatst 2 juli 2007 Wellicht een kleine waarschuwing m.b.t. de Diagnostic Screen(s) GPSMap 76CSx; "...Enter - Hold the enter key down while powering up the unit will cause a test mode screen to appear. This test screen is used at Garmin in final testing and calibration of the unit. Warning! Do not use this screen if your unit can get a lock onto satellites. It is possible that a real satellite may spoof the test mode into recalibrating the unit with the wrong data. No permanent damage will be done but you may experience a little longer lockup times or may even have to do a total cold start to get it running again. You may also experience continued longer lockup times for awhile while the unit re-calibrates itself under use. You can read this document for a discussion of this issue from Garmin. If your unit has a removeable antenna then unplugging the antenna is a good way to ensure that no lock can be obtained. The test mode screen can appear automatically if the unit detects a failure during power up. You can use this mode to verify certain operations of the unit. For example hitting each key will cause the corresponding key in the display to darken. Hitting the enter key twice in a row (on some units it is the page key) will cause a graphic pixel test which could highlight any bad pixels in your display. Hitting the same key again will further test the display. Hitting the key one more time will return to the main test screen. One units that use the page key to perform this test you can use the quit key to perform the graphic test backwards. The power/lamp key will show both an indication and actually light the lamp...."
rwvdknoop Geplaatst 2 juli 2007 Geplaatst 2 juli 2007 Het vervolgverhaal op mijn eerdere reactie: "... WHAT HAPPENS WHEN YOU INADVERTENTLY ERASE ALL DATA STORED IN THE GARMIN Because of confusion and misinformation on the newsgroup, I have asked Garmin Engineering to give us a consensus view of how the accuracy and operation of the G-12XL (and other Garmin equipment can be affected by operating the factory test mode while in view of "real" satellites. In my view, the significance of the "problem" is minimal since calibration points are automatically restored when the unit is operated locked to SVs the next time(s). The Garmin answer follows: Joe Mehaffey ================================================================= The answer from Garmin Engineering Follows: Joe, Some one did talk to Jay on the phone. I guess the answer was not clear to him. What was said to Dr. Reid in the original email to him (who altered it and then posted it (Garmin never posted this information)) was that by operating the unit in test mode, AND locking on to a specific satellite, you would destroy the unit's oscillator compensation curve AT THE TEMPERATURE WHERE THE LOCK OCCURS. Perhaps destroy is a bad word, it does sound somewhat permanent. In fact, it WILL NOT damage the unit in any way, but will erase the oscillator temperature calibration point. It would appear that some have interpreted it as a permanent degradation of the units performance. For that we apologize. That is NOT correct. Accuracy was never an issue. The only issue at stake is the ability of the unit to lock on to satellites and calculate a position. As we know from GPS 101, A GPS receiver must be precisely synchronized with the satellites to operate. We must know the exact time the signal left the satellite, and the time the signal arrived at the receiver, to calculate the time difference and corresponding range to the satellite. By knowing the precise location of the satellite when the signal left, and the range (pseudorange), we know our exact distance from that satellite (at that point in time). By performing this calculation on multiple satellites, we can triangulate and calculate our position. Obviously, timimg is everything. We must have a precise timing source for this to work. We could install a rubidium or cesium beam oscillator in our GPS receivers, but this would be a little pricey, use a lot more battery power, and the unit would be a little bulky. Instead, we use a relatively cheap oscillator, and a lot of software finesse. Oscillator compensation data is stored in the unit as a table based upon temperature. When the unit locks on, it calculates the unit's oscillator error and enters a correction factor into this table based upon current internal temperature. In this fashion the unit is CONSTANTLY "learning" and fine tuning itself. We burn these units in when new to calculate and store calibration constants across the entire rated temperature range of the product. What Darrin and the previous Email tried to explain, perhaps in different tones, was that running the GPS 12XL, or other GARMIN units, in test mode, would mis-calibrate the units internal oscillator if the unit locked onto the same satellite it expects to see in the factory environment when connected to a signal generator. The amount of mis-calibration depends on where this particular satellite happens to be in the sky. If the satellite is low on the horizon and heading directly towards or away from you, there will be significant doppler shift on the signal which in turn will grossly mis-calibrate our oscillator. This would be worst-case and statistically rare. The net effect of this type of mis-calibration may range from long acquisition times to, on rare circumstances, failure to acquire at all. If the latter occurs, as Darrin pointed out, the user can put the unit into Autolocate mode, which ignores oscillator calibration and the unit will lock on and begin to repair the correction table for each temperature it experiences. Of course, some users might not know to put the unit into Autolocate mode, they may see the unit not locking onto satellites and believe it to be malfunctioning. As soon as the unit locks on, oscillator calibration is performed and peak accuracy is immediately restored. Of course, for complete repair, the unit will need to be locked on to real satellites for each temperature point that the unit was mis- calibrated to. Darrin and I do not disagree on any points. He was stating his perspecive from a designers point of view, and I am giving you mine from the standpoint that we don't want anyone to erase the calibration from his unit. GARMIN International 1200 E. 151st Street Olathe, KS 66062 USA..."
Ringeling Geplaatst 2 juli 2007 Geplaatst 2 juli 2007 (bewerkt) Ja, de Quest geeft inderdaad ook de informatie door 'on' en 'ok' tegelijkertijd in te drukken. Ik neem aan dat de tijd achter 'Reset' de tijd is dat ik hem heb gebruikt? Dat is dan nu: 1868:46 uur. (= dan ongeveer € 0,37 per uur / toenmalige aanschafprijs / september 2004) 3 juli 2007 bewerkt door Ringeling
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