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Nothing comes close to a Cobra
®
Operating to Receive and
Transmit
14
English
Indicators and Microphone
Indicators
--
4Analog Meter
The meter needle swings proportionally to the strength of the incoming signal
or RF output power in receive or transmit modes.
When used to tune the antenna or monitor the quality of the coaxial cable and
RF electrical connections, the needle swings proportionally to the ratio of standing
wave ratio and RF output. If there is any degradation in these, due to humidity,
salt, spray, vibration or corrosion, the SWR meter reading will rise, thereby
indicating that a problem exists.
--
4RX / TX Indicator
This indicator glows green when in receive mode and red when in transmit mode.
--
4Antenna Warning Indicator
This indicator glows red whenever the standing wave ratio is greater than 3 to 1.
Microphone
The receive and transmit modes are controlled by the Press-To-Talk (PTT) switch
on the microphone. Press the switch to transmit, release it to receive. When transmitting,
hold the microphone two inches from the mouth and speak clearly in a normal voice.
To substitute for the supplied low-impedance (500 ohm) dynamic microphone,
see the alternate microphones and installation section on page 17.
Operating to Receive
To begin operating your radio:
1.
Be sure the power source, microphone and antenna are properly connected.
2. Turn the unit on by turning the volume knob clockwise and set the volume for a
comfortable listening level.
3. Set the PA / AM / FM switch to the desired AM or FM.
4. Set the RF gain control fully clockwise for maximum RF gain.
5. Listen to the background noise from the speaker, then turn the squelch ring slowly
clockwise until the noise just disappears (no signal should be present). Leave the
control at this setting. The squelch is now properly adjusted. The receiver will remain
quiet until a signal is actually received. Do not advance the control too far, or some
of the weaker signals will not be heard.
6. Select the desired frequency with the band and frequency selector knobs.
7. Adjust other controls as desired.
Operating to Transmit
To transmit a signal:
1.
Select the desired frequency for transmission if different from the one
chosen to receive.
2. Set the microphone gain knob fully clockwise.
3. If the frequency is clear, depress the Press-To-Talk switch on the
microphone and speak in a normal voice.
Your Mobile Radio Your Mobile Radio
11


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