Quote:
Originally Posted by Astrak
The lightning bolt symbol on the bottom of the scanner shows that the radio is receiving a tone,
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This is correct. As long as you have the mode set to CT or DC, when a tone is being received, the lightning bolt will be illuminated.
Quote:
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if you look towards the top at the same time you'll notice that the symbol is also there regardless of whether or not a tone is present while the scanner is receiving a signal.
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This is NOT CORRECT. The PSR-300 & PSR-400 have a newer display. They do not display a lightning bolt for "signal present" they now have an "S meter". The meter's value indicates a signal level, not just "present" and "not present". I should also note that the "S" indicates the squelch is open, not that a signal is present.