Cobra Electronics Cobra 29 NW ST Calibrate For SWR Standing Wave Ratio, Push and hold mic button

Page 6

Operation

Operation

 

 

Calibrate For

SWR (Standing

Wave Ratio)

Calibrate for SWR (Standing Wave Ratio)

SWR calibration is done to properly adjust the length of the antenna and to monitor the quality of the coaxial cable and all RF connections.

This calibration is critical in order to achieve opti- mum performance.

29 NW ST

N B /

C B

H I

TONE C H 1 9

A N L

R X / T X

 

 

A N L

 

 

C H 9

O F F

P A

N O R

N O R

E

R F G A I N

D I M M E R

 

 

 

S W R C A L

A X M I N

M A X M I N

M A X

1Select channel 20.

 

 

 

 

 

 

 

29 NW ST

 

SWR

2

3

 

CAL

S / R F

 

N B /

C B

 

RF

 

 

 

 

 

 

A N L

 

 

 

 

 

 

 

 

 

 

 

 

 

S W R

 

A N L

 

 

SIG 1

3

5

7 9

+30dB

 

 

 

 

 

 

P A

 

 

 

 

 

 

C A L

 

O F F

 

 

 

 

 

 

 

 

 

 

 

V O L

S Q L

D Y N A M I K E

 

R F G A I N

 

 

 

O F F

 

 

M I N

M A X M I N

M A X

2 Switch to the

CAL position.

 

 

PUSH &

HOLD

3Push and hold mic button.

29 NW ST

 

 

N B /

C B

TONE

C H 1 9

A N L

H I

R X / T X

 

 

A N L

 

 

C H 9

O F F

P A

N O R

N O R

E

R F G A I N

D I M M E R

 

 

 

S W R C A L

M A X M I N

M A X M I N

M A X

4While holding mic

button adjust the

 

SWR

2

3

 

 

 

CAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWR CAL knob so the

 

 

 

RF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

meter needle swings

SIG 1

3

5

7 9

+30dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to the CAL ▼ mark on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the meter (located on the right).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

continued

Note

Calibration must be made in an open area (never in a garage). Vehicle doors must be closed. No one should be standing near the antenna. (See your antenna directions for more complete information).

Note

The reading will be slightly high- er on Channels 1 and 40 com- pared to Channel 20.

10

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Contents How to Use Your Cobra 29 NW ST Installation Location LocationMounting and Connection ANT CB Antenna Marine InstallationAntennas Ignition Noise Interference CB AntennaTurning On Setting Channel SelectorOperation Turning OnCalibrate For SWR Standing Wave Ratio Calibrate for SWR Standing Wave RatioPush and hold mic button To Receive To ReceiveSelecting a Channel MeterHow SoundTrackerTM Works ActivatingSoundTrackerTM System Activating SoundTrackerRF Gain Control Tone Hi/Nor Automatic Noise Limiter SwitchOFF Noise Blanker Tone Hi/NorDimmer Switch Dimmer Switch Setting SquelchSetting Squelch To Transmit TransmitRF Meter RF MeterExternal Speaker PA Public Address PA Public AddressPush and hold microphone button and speak Base Station Operation From 120V AC House Current Home And Office Set-Up Temporary Mobile Set-UpBase Station Operation From 120V AC House Current Temporary Mobile OperationHow Your CB Can Serve You Few Rules You Should Know Channel Emergency MessagesCB 10-Codes CB 10-CodesFrequency Ranges NW ST Specifications 27.205Limited Two Year Warranty Optional Accessories Applicable taxes apply Shipping and handling $6.00Pin Premium Noise Cancelling Microphone CB Story IC/FCC RegulationsWhat’s Included with Your 29 NW ST Controls and Indicators Our Thanks to You SoundTrackerTM