Incorrect Date and Time Displayed on GPS Models During Quick Align and Auto Align
During most alignment routines the scope references the GPS module for the correct date and time and uses the time zone and daylight savings time settings in the hand control to display local time. If the GPS module can obtain a link, the date and time will be updated, if not, the GPS module reports the date and time based on the last link, potentially off by a few seconds.
One source of inaccuracy is an incorrect setting for either the time zone or daylight savings time - read this for more details.
There is another potential problem. The GPS module uses either a small
rechargeable battery (older models) or a super-capacitor (current models) to
maintain the date and time as well as the most recent data elements
downloaded from the GPS satellites. If your telescope has not been used in
several weeks or is only used infrequently for short periods of time this
battery or super-capacitor will lose its charge. In this case the date and
time will revert to an arbitrary state and linking to the GPS satellites
will take longer than normal, perhaps several minutes.