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Note: Settings can be changed when the power is ON, but changes are not valid until the
power has been switched OFF and ON again, except in the case of switch 3 for optical
level testing, which is valid immediately.
4.2 How to Turn on the Power
Turn on the power switch. Power ON is confirmed by the illumination of the "5V" LED on the
front panel of the unit.
4.3 Checking the 1PPS Signal
After the power is turned on, check that 1PPS signals are output. If 1PPS signals are not output, it
is impossible to use the time signals that are output from the GPS receiver unit. Output of 1PPS
signals is confirmed by the blinking of the "1PPS OUT" LED on the front panel of the unit.
Table 4.1 Setting the Switches
Switch
Function
No.
1
Location mode
change
2
Reliability/TRAIM
mode change
3
Optical level test
4
Clock range
change
-
In the case of location mode, the location estimation mode (OFF) should be used.
-
In the case of reliability/TRAIM, the High-reliability/Train ON mode (SW-OFF)
should be used.
-
In high-reliability mode, the unit outputs the 1PPS signal only when no failed
satellites are detected. In the case of two or more failed satellites, correct
operation of the unit cannot be assured.
-
In the case of clock range change, the switch should be OFF before 2019 and ON
after 2020.
For the details, see the Appendix D.
Setting
ON
Location fixing mode
Normal/TRAIM OFF
Continuous light emission
2020 – 2039 (Year)
9
6 F 2 S 0 7 3 8
OFF (default)
Location estimation mode
High-reliability/TRAIM ON
Normal light emission
2001 – 2019 (Year)
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