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9

Operation

Operation

Receiving Transmissions and Adjusting SQUELCH

1.

Rotate

SQUELCH

 fully counterclockwise.

2.

Rotate

VOLUME

 clockwise until it clicks to turn on the transceiver. The

 turn on the transceiver. The 

channel display lights and the channel appears, and the 

RX

 indicator lights.

3.

Set

 OUT CH9 CH19

 to 

OUT

 if you want to select a channel other than an 

emergency channel.

4.

Rotate the channel selector until the display shows the desired channel.

5.

Adjust

VOLUME

 to a comfortable listening level.

6.

To cut out background noise between transmissions, wait until there is no 
signal, then slowly rotate 

SQUELCH

 clockwise until the background noise 

stops.

7.

To turn off the CB, rotate

otate

VOLUME

 counterclockwise until it clicks. The 

display and indicators turn off.

Note: To receive very weak signals, turn SQUELCH counterclockwise. You will 
hear noise between transmissions, but you will also hear weak transmissions 
(those not strong enough to break through a higher squelch setting).

Transmitting

Follow steps 1 – 5 in 

“Receiving Transmissions and Adjusting SQUELCH”.

To transmit, hold down 

PUSH TO TALK

 (PTT) on the microphone and speak. The 

TX

 indicator lights. Release 

PUSH TO TALK

 when you finish transmitting. The 

TX

indicator turns off.

To turn off the CB, rotate 

VOLUME

 counterclockwise until it clicks. The display 

and

RX

 indicator turn off.

Selecting the Emergency Channel

Important:

 Channel 9 is reserved for motorist assistance and for reporting 

emergency information about accidents, hazardous road conditions, and so 
on. Always give emergency messages priority on Channel 9. To select the 
emergency Channel 9, set 

OUT CH9 CH19

 to 

CH9

. The selected channel 

number flashes on the display.

Channel 19 is used by truck drivers for general communication purposes. To 
select this channel, set 

OUT CH9 CH19

 to 

CH19

.

To select another channel, set 

OUT CH9 CH19

 to 

OUT

. The previously selected 

channel number appears on the display.

Summary of Contents for 21-1703 A

Page 1: ...and using your new product 21 1703 A CB Radio Microphone Holder Mounting Bracket 5mm Machine Screw 2 3mm Machine Screw 2 5mm Self tapping Screw 2 3mm Self tapping Screw 2 Spring Washer 2 big 4 small P...

Page 2: ...ng the Transceiver 8 Operation 9 Receiving Transmissions and Adjusting Squelch 9 Transmitting 9 Selecting the Emergency Channel 9 Operational Hints 10 Common Uses for CB Radios 10 Transmission Courtes...

Page 3: ...superior channel selectivity and freedom from adjacent channel interference Automatic Modulation Control prevents the transmitter signal from over modulating and distorting Product Features TX RX Show...

Page 4: ...le such as the dashboard follow these steps 1 Using the holder as a template mark the positions for the mounting screw holes at the desired location 2 At each marked position drill a hole slightly sma...

Page 5: ...points The most common mounting location for this CB is under the vehicle s dashboard However if you plan to use the CB as a base station you can place it on a desk shelf or table see Using the Trans...

Page 6: ...he vehicle as far as possible from sources of electrical noise vertically To take advantage of your CB s maximum range you can adjust the antenna s standing wave ratio SWR using an SWR meter not suppl...

Page 7: ...ver pull on the microphone never pull on the microphone cable Connecting an External Speaker Your transceiver also can be connected to an external CB speaker not supplied Note When you connect an exte...

Page 8: ...connector Warning Use extreme caution when you install or remove a base station CB antenna If the antenna starts to fall let it go It could contact overhead power lines If the antenna touches a power...

Page 9: ...ween transmissions but you will also hear weak transmissions those not strong enough to break through a higher squelch setting Transmitting Follow steps 1 5 in Receiving Transmissions and Adjusting SQ...

Page 10: ...ring more fun for camping shing and other sports help locate a friend or nd out what s cooking back at camp Transmission Courtesy Wait for a pause in someone else s transmission before you ask for a b...

Page 11: ...is your location 10 21 Call ___ by telephone 10 22 Cancel last message 10 23 ___ arrived at the scene 10 24 ___ assignment complete 10 25 Meet ___ 10 26 Estimated time of arrival is ___ 10 30 Use caut...

Page 12: ...ng channel Switch to an active channel PUSH TO TALK is not rmly pressed down Press PTT completely The CB does not work at all Secure connections The fuse may need replacing See Replacing the Fuse on p...

Page 13: ...m dust and dirt and wipe it with a damp cloth occasionally to keep it looking new If your CB is not performing as it should take it to your local RadioShack store for assistance To locate your nearest...

Page 14: ...27 405 MHz Frequency tolerance 1300 Hz Carrier power at no modulation 4 watts Spurious emission 67 dB Current drain at no modulation 1300 mA Modulation frequency response for 450 2500 Hz 6 dB Microph...

Page 15: ...ion of a Class D CB We have provided a copy of these regulations with your CB Do not open your CB to make any internal adjustments Any internal adjustments can be made only by an authorized service te...

Page 16: ...ntal or consequential damages so the above limitations or exclusions may not apply to you In the event of a product defect during the warranty period take the product and the RadioShack sales receipt...

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