Covalue CU780, Instruction Manual

low transmission power, and “H” and “L” will be shown on the 

Press this button to make selection among the high and 

■

  Programmable Button Function 

The dealer can program the Side Button 1, Side Button 2 and the Top Button with the following 

Optional functions: 

Buttons  

Function Description 

None  

No function   

Channel Up   

Select the next channel   

Channel Down   

Select the previous channel 

Zone Up 

Select the next zone   

Zone Down   

Select the previous zone   

Display Channel Frequency   

Press this button and the LCD will show the frequency of the current 

channel.  

Display Channel Name   

Press this button and the LCD will show the name of the current 

channel.  

Display Mode Switch   

Press this button and the LCD will show “Channel Number”, 

“Channel Name”, “Zone Number, Zone Name” and “Channel 

Frequency” alternately. 

OST 

Change the setup of preset CTCSS/DCS for the current channel.   

Power level Selection       

LCD    to represent the current transmission power.     

Squelch Level Selection   

Press this button to enter the “Squelch Level Adjustment Mode” 

first, and then press the 

/

  button to adjust the level. 

Press the 

O

  button to save the selected squelch level and quit 

this mode. 

Key lock   

To toggle between locking/unlocking your radio’ keypad. 

Scan  

Scan 

a)

Press the button set as “Scan” to start or stop scanning. If 

scan beep tone enabled, 4 high beeps will indicate entering 

scanning state, or 4 low beeps indicate exiting scanning 

state. If scan LED enabled, (the GREEN LED will blink 

while scanning). 

b)

The working channel of the radio will revert to the defined 

channels automatically when you press PTT button during 

scanning.  

Nuisance  Delete  

When one channel continually generated unwanted noise. this 

allow you temporary remove the channel from the current active 

scan.  

Voice Companding   

Start/end the voice compression/expansion function.   

Public Address 

Start/end the public address function. Press this button and the 

function will be activated. Press the PTT button and speak to the 

microphone so that you can hear your voice through the external 

speaker . Press this button once again and    return to the normal 

user mode.     

Scrambler 

Enable or Disable voice scrambler function.