Midland-radio UHF HANDHELD TRANSCEIVER 70-440BP Manuel d'utilisateur télécharger pdf (Page 12)

70-440 User manual

Page.

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 (Continuous Tone Code Squelch System / Digital Coded Squelch): 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.

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Midland-radio UHF HANDHELD TRANSCEIVER 70-440BP Manuel d'utilisateur Page 12