Vertex Standard EVX-5400 Operating Manual page 32

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Press, (or press and hold), the assigned PF key to toggle the optional accessory "On"
and "Off".
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avE IsaBlE
Press, (or press and hold), the assigned PF key, the display indicates "TX
SAOFF" briefly and disable the Transmit Saver, if you are operating in a location
where high power is almost always needed.
Press again, (or press and hold again), the assigned PF key, the display indicates
"TX SA ON" briefly and the Transmit Saver activates to reduce the transmit pow-
er when a very strong signal from an apparently nearby station is being received.
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Press, (or press and hold), the assigned PF key to lock the functionality of the
front panel's keys. You may change the lockout configuration by the "User Set
(Menu)" mode. See page 32 for more information.
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