RadioShack FM Mobile Transceiver HTX 252 Owners Manual

Cat. No. 19-1127
OWNER’S MANUAL
Please read before using this equipment.
HTX-252
2–Meter Amateur
FM Mobile Transceiver 

2
FEATURES
Your RadioShack HTX-252 2–Meter FM Mobile Transceiver is a
compact and versatile transceiver, perfect either in your vehicle
or in your home. Vehicle cables and mounting hardware are sup-
plied. Add an optional base-station antenna, cable, and a power
supply to make it your home transceiver. It is an all-around ideal
choice for your amateur communications needs.
Note: You must have a Technician Class or higher Amateur Ra-
dio Operator’s License and a call sign issued by the FCC to legal-
ly...

3
Programmable Frequency Step — lets you set the frequency
step for tuning or scanning to 5, 10, 12.5, 15, 20, 25 kHz.
Signal Strength Indicator — a graduated bar shows the relative
strength of the received signal and transmitting signal.
Digital Phase-Locked Loop (PLL) Frequency Synthesizer —
provides highly accurate and stable tuning.
Built-In Automatic Modulation Control — ensures a constant
RF modulation level.
Repeater Offset — lets you select the appropriate offset value to
match a local repeater....

4
MANUAL CONVENTIONS
Some of your transceiver’s controls perform multiple functions.
The abbreviation or symbol for a function is printed on, or above
each multi-function button.
To activate certain transceiver features, you must press 
F (func-
tion)
 and then another button. Those key combination instruc-
tions are printed as the first button name, +, then the second
button name. For example, 
F+LOCK means press F then press
LOCK.
Control names are printed in small, bold, capital letters such as
CALL...

5
CONTENTS
Introduction to Amateur Radio  .............................................  7
Preparation  .............................................................................  9
Attaching the Microphone Holder  .....................................  9
Mounting the Transceiver  .................................................  9
Connecting an Antenna  ................................................... 11
Connecting the Microphone  ............................................  12
Using an External...

6
Other Special features  .........................................................  31
Using Priority Frequency Monitor  ....................................  31
Using VFO Priority  ...................................................  31
Using Memory Priority  ..............................................  31
Changing the Transmit Frequency Range  ......................  32
Selecting the Transmit Power Level  ................................  32
Locking the Keypad...

7
INTRODUCTION TO AMATEUR RADIO
This transceiver is the perfect first radio for anyone entering the
exciting world of amateur radio, as well as a great additional
transceiver for the experienced amateur radio operator. This
transceiver opens a door for you to the world from almost any-
where! All you need is an Amateur Radio Operator’s License
(Technician Class or higher) issued by the Federal Communica-
tions Commission (FCC). If you do not have a license, it is easier
than ever to get one, and help...

8
Start studying for the license exams. Do not be intimidated by the
word “study,” because most people can go from knowing abso-
lutely nothing about amateur radio to passing the Novice and
Technician written exams in less than a month. 
The exams test your knowledge of basic radio regulations and el-
ementary radio theory. Many clubs hold license classes which
can be a fun and easy way to learn about amateur radio. There
are good books, cassette tapes, computer programs, and many
other study aids...

9
PREPARATION
ATTACHING THE
MICROPHONE HOLDER
Follow these steps to attach the
microphone holder to your vehicle.
1. Using the holder as a tem-
plate, mark the position for the
mounting screw holes at the
desired location.
2. At each marked position, drill
a hole slightly smaller than the
supplied mounting screw.
Caution: Be careful not to drill
into anything behind the
mounting surface. 
3. Use a Phillips screwdriver to attach the holder to the mount-
ing location with the supplied small self-tapping...

10
Caution: If you use the transceiver in a vehicle, mount it securely
to avoid damage to the transceiver or vehicle, or injury to anyone
in the vehicle during sudden starts or stops.
Follow these steps to mount the transceiver.
1. Using the mounting bracket as a template, mark the posi-
tions for the screw holes on the mounting surface,
2. In each marked location, drill a hole slightly smaller than the
supplied self-tapping screws.
Caution: Be care not to drill into objects behind the mount-
ing...