User guide

Reception
method
Time adjustment Time zone adjustment
Leap second data
reception
Display
How to manually
adjust the time
 P. 21 ~ 22
Automatic time
adjustment  P. 23
How to adjust the time
zone  P. 14 ~ 16
Features
Time adjustment
Precise current time of the set
time zone is displayed
 Check the set time zone  P. 16
Time zone identification and
time adjustment
Time zone where you are is identified,
and the precise current time is
displayed
Leap second
reception
Ready for leap second
data reception and
receiving lead second
data  P. 30
Number of
acquired satellites
necessary for
reception
One unit (to obtain only time
information)
Basically more than 4 units (to obtain
time information and time zone
information)
Time taken for
reception
6 seconds to 1 minute 30 seconds to 2 minutes Up to 18 minutes
What kind of
situation
To set the watch to the precise
time while it is used in the same
time zone
When the watch is used in a different
time zone
This is automatically
displayed after time
zone adjustment or
time adjustment is
performed around
June or December
29
ASTRON 7X52 GPS SOLAR
DETAILED INFORMATION
CONTENTS
5
GPS signal reception
GPS signal reception includes three types. Features for each type are as follows.
Q: When the watch is moved to a different time zone, does the
watch automatically display the local time?
A: The watch does not automatically display the local time just
by being moved. If you are in a place where GPS signals
can be easily received, adjust the time zone. The watch
automatically displays the local time.
When you are in a place where GPS signals cannot be
received, manually set the time zone.
 Manual time zone setting P. 20
(The watch can be set to a total of 39 time zones around the
world.)
Q: Is Daylight Saving Time (DST) automatically changed by
receiving GPS signals?
A: Manually set Daylight Saving Time (DST).
 Set Daylight Saving Time (DST) P. 17 ~ 18
(GPS signals from GPS satellites do not include information
about Daylight Saving Time (DST).)
Even in the same time zone, some countries and regions do
not adopt Daylight Saving Time (DST).
 Daylight Saving Time (DST) P. 17
Q: Is it necessary to carry out special operation for years in which
a leap second is added?
A: No special operation is necessary.
Since the watch receives leap second data at the same time
of receiving GPS signals around June or December, a leap
second is automatically added by periodically receiving GPS
signals. For details, refer to “Leap second (automatic leap
second reception function)  P. 30.”
GPS signal reception Q & A