La Crosse Technology WS7034UITCA Instruction Manual page 12

*When the signal is successfully received by the Temperature Station, the icon will be switched on.
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(If not successful, the icon will not be shown in LCD) So the user can easily see whether the last
reception was successful (icon on) or not (icon off). On the other hand, the short blinking of the
icon shows that a reception is currently taking place.
If the signal reception is not successful at the first frequency (915MHz) for 45 seconds, the
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frequency will be changed to 920MHz and the learning is tried for another 45 seconds. If it is still
not successful, the reception will be tried for another 45 seconds on 910MHz. This will also be
done for re-synchronization.
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