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6 F 2 S 0 7 3 8
6
5
4
3
2
1
0
Power ON
1PPS output
Stop
1PPS stop 1PPS output 1PPS output
1PPS output
A
lmanac data reception
(12 to 30 minutes)
Four receivabl
e
satellite signals
Five receivable
satellite signals
One receivabl
e
satellite signal
Two receivable
satellite signals
(In the case of normal mode)
(In the case of high-
reliability mode)
Number of receivable
satellite signals
Time
Figure 5.1.1 Receiving Satellite Signals and 1PPS Output Status
5.2 Time Data Output
On power-up, time data (serial data consisting of year-month-date and hour:minute:second) is
output from the receiver's internal RTC (real time clock).
If satellite signals are received, then time data transmitted by the satellite (i.e., GPS time) is
output until acquisition of the almanac data is completed. The GPS time deviates from UTC time
by an accumulated number of leap seconds.
When reception of the almanac data is completed, then UTC time is output.
Any device receiving this output data can distinguish between the RTC, GPS and UTC time data,
since this is indicated in the data itself.