Cobra 25-NW Specifications download pdf (Page 4)

Ignition Noise InterferenceAntennas

Use of a mobile receiver at low signal levels is

normally limited by the presence of electrical

noise.The primary source of noise in automobiles

is from the alternator and ignition system.

Typically, when signal level is adequate,the back-

ground noise does not present a serious problem.

Also,when extremely low level signals are being

received,the transceiver may be operated with

the vehicle’s engine turned off.The unit requires

very little current and therefore will not signifi-

cantly discharge the vehicle’s battery.

Even though the Cobra 25 WX NW ST has an

automatic noise limiter,in some installations igni-

tion interference may be high enough to make

good communications impossible.Many possibili-

ties exist and variations between vehicles require

different solutions.Consult your COBRA dealer or

a 2-way radio technician for help in locating the

source of a severe noise.

CB Antenna

Note

For optimum performance in

passenger cars the ideal anten-

na location is on the center of

the roof.Second choice is on the

center of the trunk.

Note

Because many newer trucks

feature fiberglass door skins,the

outside mirror must be ground-

ed to the chassis via a ground

strap,if the antenna is mounted

on the mirror bracket.

Note

3-way Combination Antennas

are also available which allow

operation of all three bands

(AM-FM & CB),using a single

antenna.However,this type of

antenna usually results in less

than normal transmit and

receive range when compared

to a standard-type“Single

Band”CB antenna. Call

773.889.3087 for further infor-

mation.

CB Antenna

Si n ce the maximum allowable power output of

the tra n s m i t ter is limited by the FCC ,the ante n n a

is cri t i cal in affe cting transmission distance.Only a

p ro pe rly matched antenna sys tem will allow maxi-

mum power output.Co b ra loaded ty pe ante n n a

m odels are highly re commended for most instal-

l at i o n s.For models with Weather Fe a t u re (W X ) ,a

Dual Band (Ce n t er Lo a d / B ase Load) antenna is

re co m m e n d e d. Consult your Co b ra dealer for fur-

ther details,or call 773.889.3087 and speak to a

Co b ra re p re s e nt at i v e.

Marine Installation

The transceiver will not operate at maximum effi-

ciency in a boat without a ground plate,(unless it

has a steel hull). Before attempting installation ,

consult your dealer for information regarding an

adequate grounding system and prevention of

electrolysis between fittings in the hull and water.

A standard antenna connector is provided

on the transceiver for easy connection.

25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 6

1 2 3 4 5 6 7 8 9 ... 21 22

Comments to this Manuals

No comments

Cobra 25-NW Specifications Page 4

Comments to this Manuals

Related products and manuals for Two-way radios Cobra 25-NW