70-440 User manual
Page. 12
Adjusting volume
The
PWR/VOL
knob is used to adjust the RX volume: turn it clockwise to increase or counterclockwise to
reduce it.
Channel selection
Each channel is identified by 2 numeric digits.
Channel
Freq. MHz.
Channel
Freq. MHz.
Channel
Freq. MHz.
To select a channel:
1) Press the
key to increase the channel number or the
key to decrease it.
Receiving
Your radio can be programmed to work, channel by channel, in “Open traffic” or “GROUP MODE
(CTCSS/DCS)”. Group mode prevents other users of a channel from being heard on your radio. See
“Setting Group Mode Codes” for programming instructions.
•
OPEN TRAFFIC
: in this case you will hear all communication which will be transmitted on the
selected channel. When a message is received your squelch will un-mute, you will see the status LED
glowing green and you will hear the message.
•
GROUP MODE:
•
CTCSS/DCS
(
C
ontinuous
T
one
C
ode
S
quelch
S
ystem /
D
igital
C
oded
S
quelch): are systems
which use particular TX signaling as an access “key” to work a repeater (encoder) or to unlock the
party’s signaling sensitive squelch. This last condition allows more radio networks to share the
same frequency. In this case you will receive only messages coming from parties sending a
proper TX signaling. During “
CTCSS/DCS”
operation, the radio may be set-up so that the
appropriate
CTCSS/DCS
decoder enables the speaker.
,
CTCSS/DCS If more than one station is transmitting at the same time, this will cause
interference! Do not transmit if the status LED is glowing. Wait until the channel is clear before
transmitting.
