Casio wave ceptor 3747
Use this link to read Direct Casio manual:
http://ftp.casio.co.jp/pub/world_manual/wat/en/qw3747.pdf
I suggest you may need to wait till the first signal is received by watch.
If all this doesn't work, then check the battery condition- it may be underpowered and need replacement. Eve if your watch is brand new, the battery may be few years old.
Do not forget to rate, please.
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