| 摘要 |
<p>A selective call receiver (100) monitors an energy level of its energy source (108) relative to a threshold. When the selective call receiver (100) receives a message, an alert signal is provided to indicate message reception. The alert signal has a first duty cycle (202) when the energy level of the energy source is determined to be above the threshold. When the energy level of the energy source is determined to be below the threshold, the alert signal has a second duty cycle (212).</p> |
