pressing "rev" is the "reverse key," which then 
monitors the input of the repeater.  holding down 
the "rev" or reverse key is suppose to turn on 
the automatic  frequency checker, and also then, 
every 3 seconds, the transceiver actually goes 
into the reverse mode automatically listening to 
the input of the repeater.. the icon blinking 
means it hears something on the input, but I just 
cannot get it to do something audibly, though I 
think I did hear it work, once. meaning it was 
turned on once, but I never got it to do it again. :)


At 07:29 PM 05/25/13, you wrote:
>         The automatic frequency checker sounds like a visual thing.
>
> >From the manual
>
>Press [REV] (1s) to turn the ASC ON.
>
>When the ASC is ON, the icon will appear on the display.
>
>· While direct contact is possible, without the use of a repeater, the icon
>will
>
>begin blinking.
>
>· To exit ASC, press [REV].
>
>Note:
>
>Pressing [PTT] will cause the icon to stop blinking.
>
>ASC does not function if you are using simplex operation.
>
>ASC does not function while scanning.
>
>Activating ASC while using Reverse will switch the Reverse function OFF.
>
>If you recall a Memory channel or the Call channel, and those channels are
>set
>
>up with the
>
>Reverse function switched ON, the ASC will switch OFF.
>
>A
>
>
>
>
>
>display and blinks. Press any key other than the Tuning control while the
>
>I wonder what "press "rev" means, I think they are talking about menu setup,
>but am not sure about the manual's translation, or my understanding.