Importance

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Abstract

Power consumption when reception is carried out in response to a reception instruction by a user is reduced in a satellite radio-controlled wristwatch. A satellite radio-controlled wristwatch according to the present invention includes: a satellite radio wave reception unit including an antenna, a high frequency circuit, and a decoder circuit; a clock circuit; an operating member; and a controller for controlling timings of at least: an activation operation; an acquisition and tracking operation; and a time information acquisition operation, the controller being configured to: detect a reception instruction by a user; immediately start the activation operation when a delay time period from when the reception instruction is issued to an earliest time information receivable time point is longer than a first threshold value and shorter than a second threshold value; wait for arrival of an activation time point inversely calculated from the earliest time information receivable time point to start the activation operation when the delay time period is longer than the second threshold value; and wait for arrival of an activation time point inversely calculated from a next earliest time information receivable time point to start the activation operation when the delay time period is shorter than the first threshold value.

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First Claim