Carrier Control Timer

If the programmed time for continuous transmission is exceeded, five short high-pitched warning tones followed by a long low-pitched tone will be heard. The transmitter will shut down shortly after hearing the alert, interrupting communications. Release and re-key the PTT button to maintain communications. This will reset the carrier control timer and turn the transmitter back on.

Low Battery Warning

Alow-pitched tone is heard and comes on indicating that the battery voltage is low. Double tones are then heard until the PTT or CLEAR button is pressed.

Low Battery Alert (Transmit Lockout)

If the radio is keyed and a double tone is heard as well as LOW BATT is displayed, the battery is discharged beyond the point where the radio will transmit. The radio will still be able to receive calls until the battery is discharged beyond the point of operation, after which the battery will need to be recharged to resume normal operation.

Key Press Alert

A short tone or "beep" sounds to indicate a key has been pressed. A short low-pitched tone indicates the key is not active in the current mode.

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Tyco LPE-200 manual Carrier Control Timer, Low Battery Warning, Low Battery Alert Transmit Lockout, Key Press Alert