Emergency Alert Mode
The Emergency Alert feature can be used to signal members in your group of
your need for urgent help. PX650 series radios will operate in an automatic
“hands-free” emergency control mode for a total of 30 seconds after activating
the Emergency Alert. PX650 series radios in your group will automatically
advance the speaker volume to the maximum setting and sound a warbling
alert tone for 8 seconds. The alert tone is emitted from your own radio speaker
and the receiving radios in your group. After the 8 seconds alert, any spoken
words or incidental sounds at your end will be transmitted to the group for 22
seconds. For the 30 seconds duration of Emergency Alert mode, PX650 series
radio controls and buttons will be locked to maximize reception of the
emergency message.
1. Press and hold the Emergency Alert button for 3
seconds.
2. Release the button after the alert tone begins to sound
and the Red and Green LED flashes alternatively each
second. There is no need to continue to hold the
Emergency Alert button or use PTT for your message
to be transmitted.
3. After the alert tone ends, you may speak into the
microphone. Your Voice or incidental sounds will be
transmitted. The Red and Green LED flashes
alternatively for the duration of the 22 seconds period.
4. After 30 seconds in total, your radio speaker will emit a
Talk Confirmation Tone and the Emergency Alert Mode
LED indication will stop flash. Operation then returns to
normal two-way mode.
Roger Beep Confirmation Tone
Your listener will hear an audible tone when you release the Talk button. This
alerts the other party that you are finished talking and it is OK for them to
speak.
To turn roger beep on or off:
1. Press the FUNC button until the current Roger Beep
status is prompted.
2. Press the Up or Down button to select Roger Beep On
or Off.
3. Choose one of the following.
a. Press the FUNC button to enter the new setting and
return to Standby mode.
b. Press the Talk button to enter the new setting and
return to Standby mode.
c. Do not press any buttons for 6 seconds to enter the
new setting and return to Standby mode.
To set VOX sensitivity:
1. Press the FUNC button until the current VOX sensitivity
level is prompted.
2. Press the Up or Down button to change the setting.
3. Choose one of the following.
a. Press the FUNC button to enter the new setting and
proceed to other functions.
b. Press the Talk button to enter the new setting and
return to Standby mode.
c. Do not press any buttons for 6 seconds to enter the
new setting and return to Standby mode.
14 15
The current VOX sensitivity level is prompted,
the value would be from 1 to 5. VOX 5 is the
most sensitive level and VOX 1 is the least
sensitive level.
FUNC and
Up/Down Buttons
FUNC and
Up/Down Buttons
Emergency Alert
Buttons
Emergency LED
Flashes
Warning: The Emergency Alert feature should only be used in the
event of an actual emergency. Cobra is not responsible if there is
no response to the emergency alert from the receiving group.
Note: All Cobra PX650/RX680/CXY900 series radios are fully
compatible with the Emergency Alert feature if they would be tuned
to the same channel and same privacy code. Radio brands other
than Cobra PX650/RX680/CXY900 series can receive the emergency
alert signal, but may not respond with adjusted volume settings,
locked controls, or a warbling alert tone. Users of other radio models
set to the same channel and code will hear a steady tone for 8
seconds followed by the voice transmission for 22 seconds.
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