Read the following technical passage:
During pre-flight inspection of the AN/PRC-149 survival radio, aircrew personnel must verify the internal battery seal before function testing. To initiate the emergency triple-beacon distress broadcast, the multi-position selector switch must be rotated past the voice channels directly to the 'BEACON' detent and held for three continuous seconds. When properly engaged, an amber LED indicator pulses twice every five seconds to confirm signal transmission across all three international distress frequencies (121.5 MHz, 243.0 MHz, and 406.025 MHz). If the indicator glows solid red instead of pulsing amber, the internal test circuit has detected an antenna impedance fault, requiring immediate unit replacement.
According to the passage, an amber LED indicator pulses twice every five seconds to confirm signal transmission across all three international distress frequencies.
Answer: Answer