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Uniden MHS450 Radio Owner’s Manual
Owner Manual Conventions
To indicate a key, button, knob or other physical control, we
print the label in BOLD UPPER CASE. To indicate an LCD
(display) label, option, or selection, we use UPPER or Lower
Case italic labels such as MENU, 5 Seconds, etc.
You will also occasionally see an option labeled as (default).
This means that the option is set in the manner indicated at
the factory and is the setting when you rst apply power. If
you choose not to alter it, the default is the setting used by
the radio.
Indicator Sounds
The radio sounds several tones designed to convey
important information. Become familiar with them to use the
radio more effectively.
Power On — a rapidly rising tone sounds to conrm that
power is applied.
Keypad Touch Single Tone — sounds to conrm you have
pressed a single key
Keypad Touch Double Tone — sounds to conrm you
pressed and held down a key for 2 seconds.
Error Tone — sounds to indicate an invalid key press or
operation.
PTT Error Tone — sounds to indicate an invalid press of the
PTT switch.
WX ALERT Tone — a rising and falling tone sounds when a
weather alert is received and decoded.
PTT Time Out Tone (PTT Error Tone) — sounds when
your continuous transmitting time exceeds 5 minutes. Also
sounds if you attempt to transmit with low power battery. If
the battery icon continues to blink once you stop pressing the
PTT key, you must recharge/replace the currently installed
battery(s)