Cellular (Tx/Rx) Led Indicator; Signal Strength And Quality - Campbell CR300 Series Getting Started Manual

If the connection is successful, the connectors icon at the bottom of the screen will come
together and clock information from the data logger will be displayed in the Station Date/Time
field. If the connection fails, a Communications Failure message will be displayed.

3.3 Cellular (TX/RX) LED Indicator

When the data logger is powered, the cellular LED will turn on according to cellular modem
communications states:
Off: Cellular modem off, insufficient power, or failure to establish a connection with the
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provider (periodic retries will occur).
Solid: Cellular modem is powering up and attempting to establish a connection with a
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provider.
Quick Flashing (approximately 1 second duration): Indicates successful network
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registration.
Flashing: Flashes with network activity.
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3.4 Signal strength and quality

Both signal strength and quality contribute to successful cellular data communications. The
factors that influence signal strength and quality include but are not limited to:
proximity to the cellular tower
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tower load
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competing signals
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physical barriers (mountains, buildings, vegetation)
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weather
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3. Cellular communications option 13