Cobra Electronics 200GTL DX - Manual (Page 8)

9 Nothing comes close to a Cobra ®
Controls
8 English
Installation and Connection
and Operation
Installation and Connection
•
If you are having difficulties in adjusting your antenna, check the following:
1. All doors must be closed when adjusting the antenna.
2. Make sure the antenna base is grounded.
3. Check your coaxial cable routing — it may be pinched where routed into the car.
4. Try a different location on your car — keeping in mind the radiation pattern you want.
5. Make sure the antenna is perfectly vertical.
6. Try a different location in your neighborhood. Stay away from large metal objects
(metal utility or light poles, fences, etc.) when adjusting.
NOTE
The radio will operate into a SWR of 2 to 1 indefinitely and sustain an
SWR of 20 to 1 for a maximum of 5 minutes at rated operating conditions.
- - External Speaker
The external speaker jack (EXT) on the rear panel is used for remote receiver monitoring.
The external speaker should have 8 ohms impedance and be able to handle at least
four watts. When the external speaker is plugged in, the internal speaker is disabled.
Operation
•
There are 17 controls and 4 indicators on the front panel of your mobile radio.
These are shown in the illustration on page A2 which may be folded out for
reference when using this section.
Controls
•
- - Off / On / Volume
Turn clockwise to apply power to the unit and to set the desired listening level.
During normal operation, the volume control is used to adjust the output level
obtained either at the transceiver speaker or the external speaker, if used.
- - Squelch
This control is used to cut off or eliminate receiver background noise in the absence
of an incoming signal. For maximum receiver sensitivity, it is desired that the control be
adjusted only to the point where the receiver background noise or ambient background
noise is eliminated. Turn fully counterclockwise, then slowly clockwise, until the receiver
noise disappears. Any signal to be received must now be slightly stronger than the
average received noise. Further clockwise rotation will increase the threshold level
that a signal must overcome in order to be heard. Only strong signals will be heard
at the maximum clockwise setting.
- - RF Gain
Used to reduce the gain of the RF amplifier when receiving very strong signals.
- - Microphone Gain
Adjusts the microphone gain in the transmit mode. This controls the gain to the extent
that full talk power is available several inches away from the microphone.
- - CW / FM / AM / USB / LSB
Selects the mode of operation.
Your Mobile Radio Your Mobile Radio