User's Manual

5. Operating Instructions of PX-Series Radio

5.1 Power On/Off

Turn Power switch clockwise and as soon as power is supplied, a “beep” sound is heard or

the “Star Spangled Banner” is played and the Radio enters into the previous latest state.

☞ Caution : If turning power on by pressing a button on Radio, the Radio may enter into a

special mode and in this case, the transmission and reception of Radio may not be possible.

Don’t use the Radio for the other purpose apart from the above.

5.2 Transmission Method

If pressing the PTT button on the left side of Radio for transmission, the DTMF is transmitted

according to the setting as soon as the PTT button is pressed or a “beep” sound is heard at

Dual PTT Mode. During this time, voice communication will not be made and after that, the red

LED (High Power) or yellow LED (Low Power) for transmission and reception is turned on and

voice is transmitted. For voice communication in the best sound quality, it is recommended to

talk 5~10cm away from the Radio.

☞ Note: If transmitting consecutively for more than a certain time when setting of BCLO

function and TOT function, the transmission can be forcibly interrupted for other

users.

5.3 Reception Method

User can adjust the volume by using volume switch and during normal reception, the green

LED is turned on. If frequency is same but Radio is not in a normal reception state, the green

LED blinks. In order to check if the current channel is in use, press the Monitor button (M) on

the left side of Radio. If pressing the Monitor button (M) for about 2 seconds, the monitor

function is activated with a “beep” sound. To release from the monitor function, press the

monitor button shortly.

5.4 Changing Channels

Channel Rotary Switch is used for changing channels. On the side of Channel Switch, channel

numbers is stipulated and whenever changing channels, the Radio generates the different

channel sounds every each channel. If the channel switch is located at a channel with no

frequency on it, an alert sound is heard continuously and in this case, no transmission and

reception is made.