Cobra Electronics Corporation MRHH400 Manual De Usuario

The On-Off/Volume knob also controls the speaker volume.
The volume adjustment applies only to what you hear from
the speaker and does not affect the volume of your outgoing
messages, which is controlled by the circuitry of your radio.

1. Turn the On-Off/Volume knob counter-clockwise.

1. Turn the On-Off/Volume knob clockwise.

Squelch control filters weak signals and radio frequency
noise so that you can more clearly hear the signals you want.

1. With the Squelch knob turned fully counter-clockwise,

turn the On-Off/Volume knob clockwise until you hear 
a hissing (noise) sound.

2. Turn the Squelch knob clockwise until the hissing 

sound stops. Turning the Squelch further clockwise will
filter weak and medium strength signals until only the
strongest signal can get through at its highest setting.

To receive weaker signals, turn the Squelch
knob counterclockwise.

If the Squelch is set so you can hear a continuous hissing
sound, the Scan and Tri-Watch functions will be blocked.

Nothing comes close to a Cobra

®

Refer to the foldout on the front cover of this manual to identify the various 
controls and indicators on your radio.

Throughout this manual you will be instructed to press or to press and hold buttons 
on the radio or on the microphone/speaker. Press means a momentary press, then
release; press and hold means to hold the button down for three (3) seconds or more.

Whenever you press any button except the Talk button on your radio,a brief tone
(beep) will sound to confirm the button press. With all button presses, the appropriate
icon will appear on the LCD and the backlight will turn On. The backlight will stay 
On for five (5) seconds after the button is released.

At times you will hear two (2) other sounds. Two (2) beeps will sound to confirm
your setting changes and three (3) beeps will sound to notify you of an error.

The On-Off/Volume knob on the top of the radio is held in the Off position by a click stop.

1. Turn the Squelch knob all the way 

counter-clockwise (when viewed from above).

2. Turn the On-Off/Volume knob clockwise 

until you hear and feel a click.

When the radio is powered On, a brief tone will sound, 
the display backlight will turn On, and the display will 
show all icons for two (2) seconds. All buttons will be
inoperative during these two (2) seconds.

After two (2) seconds, the radio will return to the settings 
in effect when it was last powered Off, the LCD will show 
the appropriate icons, and all controls will be operative. 
The radio will then be in Standby mode.

When first turned On or after memory loss, the following
defaults will be set:

■ 

Channel 1A

■ 

Transmit power high

■ 

Frequency channel map set to U.S.A.

■ 

Battery indicator set

■ 

Tri-Watch memory locations set to Channel 16 and 9.

1. Turn the On-Off/Volume knob all the way 

counter-clockwise until you hear and feel a click.