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9

1. Align the slots around the

antenna’s connector with the
tabs on the antenna jack on top
of the transceiver.

2. Press the antenna down over

the jack and turn the antenna’s
base clockwise until it locks into
place.

To remove the antenna, turn the an-
tenna’s base counterclockwise until
it unlocks, then lift it off the antenna
jack.

Connecting an Optional Antenna

The transceiver’s antenna jack
makes it easy to use the transceiver
with a variety of antennas. Instead
of the supplied antenna, you can at-
tach a different one, such as an ex-
ternal mobile antenna or outdoor
base station antenna. Your local Ra-
dioShack store sells a variety of an-
tennas.

Always use 50-ohm coaxial cable,
such as RG-58 or RG-8, to connect
an outdoor antenna. For lengths
over 50 feet, use RG-8 low-loss di-
electric coaxial cable. If your anten-
na’s cable does not have a BNC
connector, you will also need a BNC
adapter (available at your local Ra-
dioShack store). 

Follow the installation instructions
supplied with the antenna, route the
antenna cable to the transceiver,
then connect it to the antenna jack. 

Warning: Use extreme caution when
installing or removing an outdoor an-
tenna. If the antenna starts to fall, let
it go! It could contact overhead pow-
er lines. If the antenna touches a
power line, contact with the antenna,
mast, cable or guy wires can cause
electrocution and death! Call the
power company to remove the an-
tenna. Do not attempt to do so your-
self.

CONNECTING an Earphone OR 
HEADPHONES

For private listening, pull up the at-
tached plug then connect an optional
earphone or mono headphones with

1

/8-inch plug (available at your lo-

cal RadioShack store) to the EAR
jack on top of your transceiver, This
disconnects the internal speaker. 

Summary of Contents for 19-1204

Page 1: ...Cat No 19 1204 OWNER S MANUAL Please read before using this equipment BTX 123 Business Band Transceiver...

Page 2: ...range or low to save battery power Built In Modulation Limiter Circuit automatically adjusts for a wide va riety of voice levels to ensure an un derstandable transmission 3 Color Receive Transmit Bat...

Page 3: ...enna 8 Connecting an Optional Antenna 9 Connecting an Earphone or Headphones 9 Listening Safely 10 Traffic Safety 10 Connecting an Extension Speaker 10 Using the Belt Clip 10 Using an External Speaker...

Page 4: ...es and Regulations It is the user s responsibility to see that this unit is operating at all times in accordance with the FCC Rules and Regulations Apply for a frequency through the PCIA unless you ar...

Page 5: ...for the commercial use of your business and only when other commercial channels such as the telephone are either not available or not practi cal You must always yield the oper ating frequency to commu...

Page 6: ...e or would change the frequency determining method are strictly prohibited Replacement or substitution of crys tals transistors ICs regulator di odes or any other component that is of a unique nature...

Page 7: ...takes about 14 16 hours to recharge a battery pack that is fully dis charged You can charge the battery pack while it is installed or removed Cautions Do not use the transceiver while you are chargin...

Page 8: ...transceiver until the BUSY TX BATT indicator on the front of the trans ceiver lights yellow when you press PUSH TO TALK Then fully charge the battery pack Important At the end of a recharge able batte...

Page 9: ...use RG 8 low loss di electric coaxial cable If your anten na s cable does not have a BNC connector you will also need a BNC adapter available at your local Ra dioShack store Follow the installation i...

Page 10: ...or near traffic Doing so can create a traffic hazard and could be illegal in some areas If you use an earphone or head phones with your transceiver while riding a bicycle be very careful Do not liste...

Page 11: ...om your local Ra dioShack store for Channel B or as replacements for Channel A Be sure to specify the transceiver s cat alog number 19 1204 Important Channel A crystals are soldered in and can only be...

Page 12: ...ks to expose both jacks Caution PUSH TO TALK on the side of the transceiver is under spring tension and it might come loose when you remove the back cover in the next step To avoid losing PUSH TO TALK...

Page 13: ...Frequency 8 Receive Crystal Operating Frequency 10 7 MHz 4 For example to transmit and re ceive on 151 455 MHz specify a transmit crystal of 18 931875 151 455 MHz 8 and a receive crystal of 35 18875...

Page 14: ...front of the transceiver lights green when the trans ceiver receives a transmis sion If the transceiver picks up unwanted partial or very weak transmissions turn SQUELCH clockwise to decrease the tra...

Page 15: ...3 inches from your mouth Hold down PUSH TO TALK and speak into the microphone on the front of the transceiver in a normal voice The BUSY TX BATT indicator on the front of the transceiver lights red w...

Page 16: ...smitted signals and if they contain metal might com pletely block them Trees and heavy cloud formations have a similar ef fect though not as severe If you are near a lake or the ocean you might get ex...

Page 17: ...the transceiver see Installing Removing the Battery Pack on Page 7 The battery pack is not charged Charge the battery pack see Charging the Bat tery Pack on Page 7 Be sure the adapter is plugged into...

Page 18: ...he transceiver only in normal temperature environ ments Temperature extremes can shorten the life of electronic de vices damage batteries and distort or melt plastic parts Keep the transceiver away fr...

Page 19: ...ity SINAD 12 dB 0 5 V Signal to Noise Ratio 20 dB 1 0 V AF Power Output 250 mW Adjacent Channel Rejection 50 dB Squelch Sensitivity Start 0 5 V Stop Voltage 6 5 Volts Distortion 1 mV Input 3 kHz Devia...

Page 20: ...ONTAINED HEREIN EXCEPT AS PROVIDED HEREIN RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY LOSS OR DAM AGE CAUSED DIRECTLY O...

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