Manual Time Calibration Signal Receive; Receive Level Indicator; Checking The Last Time Adjustment Result; Signal Reception Precautions - Casio 5678 Operation Manual

Note
If you do not perform any operation for
●
about three minutes while performing
the Auto Receive on/off operation, the
watch automatically returns to the
Timekeeping Mode.
If you do not perform any operation for
●
about two minutes after pulling out the
crown, crown operations will
automatically become disabled. If that
happens, push the crown back in and
then pull it out again.
Manual Time Calibration Signal
Receive
1.
Place the watch near a window or some
other location appropriate for time signal
reception.
2.
Enter the Receive Mode.
Navigating Between Modes
l
3.
Hold down (A) for at least two seconds
until [RC !] appears on the display.
This indicates that the receive operation
has started. After the receive operation is
complete, the watch's time and day
settings will be adjusted accordingly.

Receive level indicator

The level indicator shows the signal
●
level ([L1], [L2], [L3]) while a receive
operation is in progress.
Receive Level Indicator
l
Note
The receive operation takes anywhere
●
from about two minutes to about 10
minutes. It can take as long as 20
minutes.
Time calibration signal reception is
●
better at night than during the day.
Watch Operation Guide 5678
Receive Level Indicator
While a receive operation is in progress, its
current status is indicated on the display as
shown below. Use the level indicator to find a
location where signal reception is stable.
Unstable
Note
It takes about 10 seconds for time
●
signal reception conditions to stabilize.
Reception conditions are affected by
●
weather, the time of day, the
surrounding environment, etc.
Checking the Last Time Adjustment
Result
1.
Enter the Receive Mode.
Navigating Between Modes
l
This displays the date and time of the last
successful receive operation.
Receive level indicator
Stable
Last receive time
Last receive date

Signal Reception Precautions

When the watch is unable to adjust its time
●
in accordance with a calibration signal for
some reason, average timekeeping
accuracy is within ±15 seconds per month.
Note that an internal decoding process the
●
watch performs after it receives a signal
may cause the time setting to be slightly off
(by less than one second).
Time calibration signal reception is not
●
possible under the conditions described
below.
While battery power is low
ー
In any mode besides the Timekeeping
ー
Mode
When the watch is at Level 2 power
ー
saving
While a compass reading, barometric
ー
pressure measurement, temperature
measurement, or altitude measurement
operation is in progress
While the barometric pressure change
ー
indication is enabled
While a timer countdown operation is in
ー
progress
While the Home City area setting is one
ー
where time signal reception is not
possible
While the watch is outside the time signal
ー
reception range
When the receive operation is successful,
●
the time and/or day settings will be adjusted
automatically. Summer time will not be
applied correctly in the case described
below.
When the summer time start date and
ー
time, end date and time, or other rules are
changed by authorities
As of January 2021, China does not
●
observe summer time. If China starts to
observe summer time in the future, the time
displayed by the watch for China may not be
correct.
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