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pulse. If the necessary number of satellites are available then the unit carries out error detection
and removal of erroneous signals. In the event of two or more satellites in error, the operation is
not assured.
In high-reliability mode, the receiver will only output the 1PPS signal when no TRAIM alarm
occurs. If any satellite is in error then it must be excluded, and so two or more satellites are
required for the purpose of outputting 1PPS.
Satellite alignment is subject to strict limits for operation of the TRAIM function. The antenna
must be located with a wide field of view.
4. Conditions for Receiving Electric Waves from Satellites
Signals from satellites at an elevation angle of less than 5 degrees are too weak to be received.
In terms of the impact of weather, satellite signals can be received correctly while it is raining or
lightly snowing, or while a small amount of snow is piled on the antenna; however, during
lightening or heavy snow, the receive status may deteriorate temporarily.