Operation
Operating Your Mobile Radio
Operation
Operating Your Mobile Radio
Operation
Squelch
•
Operation
•
Channel Selector Knob | Selecting a Channel |
This control is used to cut off or eliminate receiver background noise in the absence of an incoming signal. Adjust until the receiver noise disappears. This will require the incoming signal to be slightly stronger than average receiver noise. Further clockwise rotation will increase the threshold level which a signal must overcome in order to be heard. Only strong signals will be heard at a maximum clockwise setting.
Squelch is the “control gate” for incoming signals.
Adjust Squelch/RF Gain Knob | To squelch your radio: |
1.Full clockwise rotation closes the gate, allowing only very strong signals to enter.
2.Full counterclockwise rotation opens
the “gate,” allowing all signals in.
3.To achieve the Desired Squelch Setting (DSS), turn the Squelch control counterclockwise until you hear noise. Now turn the control clockwise just until the noise stops. This is the DSS setting.
Rotate the Channel knob clockwise until desired channel is displayed.
Channel 9/NOR/Channel 19 Button Channel 9/NOR/Channel 19
Set CH 9 to obtain instant access to the emergency channel.
Set NOR position to use the channel knob to choose any of the 40 channels.
Set CH 19 to obtain instant access to the information and calling channel.
CB/PA Button | CB/PA |
|
Gate Closed | Gate Open | Desired Squelch Setting (DSS) |
Strong Signals | Strong Signals | Strong Signals |
Medium Signals | Medium Signals | Medium Signals |
Weak Signals | Weak Signals | Weak Signals |
Noise | Noise | Noise |
RF Gain
This control is used to adjust receiver sensitivity. Maximum sensitivity allows weak signals to be received. However, very strong signals (such as from a nearby transmitter) can cause distortion at that setting. Adjust until the distortion disappears.
Reducing the receiver’s RF Gain eliminates distortion from very strong incoming signals.
To set RF Gain:
S/RF Power Meter
In the CB position, the PA function is disabled and the unit will transmit and receive on the selected channel. The PA function should not be used unless a PA speaker is connected. In the PA position, the transmit function is disabled and
the microphone output will go only to the PA speaker.
S/RF Power Meter
Shows relative transmitter RF output power and input signal strength when receiving. The Liquid Crystal Display (LCD) segments increase with signal strength.
1.Full counterclockwise rotation minimizes gain for maximum distortion control.
2.To achieve the desired level of distortion control,
turn the RF Gain knob counterclockwise until the distortion is eliminated.
3.After moving away from the strong signal, turn the RF Gain knob fully clockwise to receive all possible signals.
6
TX Indicator | TX Indicator |
The TX Indicator will light when in the transmit mode. “Busy” will appear when there is an incoming signal.
Nothing comes close to a Cobra® 7
