RadioShack FM Mobile Transceiver HTX 252 Owners Manual

31
OTHER SPECIAL FEATURES
USING PRIORITY FREQUENCY MONITOR
You can designate one frequency as primary (in either VFO or
memory mode) and another frequency as secondary (VFO only).
Once you do that, the transceiver tunes the primary frequency or
memory location for 5 seconds. Then it checks the secondary fre-
quency for 
1/2 second. If the transceiver finds a signal on the sec-
ondary frequency, it automatically remains there for 5 seconds
before returning to the primary frequency.
Using VFO Priority
1....

32
CHANGING THE TRANSMIT FREQUENCY 
RANGE
You can change the standard transmit frequency range from
144–148 MHz to an extended range of 142.000–149.885 MHz.
To set the transceiver to its extended range, turn it off. Then while
holding down 
F and LOCK, turn on the transceiver.
To return to the standard frequency range, repeat the above pro-
cedure.
SELECTING THE TRANSMIT POWER 
LEVEL
You can select either of two transmitting power levels: high (25
watts) for normal operation or low (10 watts). Choose the...

33
TURNING THE KEY TONE ON AND OFF
The transceiver is preset to sound a beep each time you press a
key. To turn off the beep, hold down the PTT button while you turn
on the transceiver’s power. To restore the key tone, repeat the
procedure.
SETTING THE FREQUENCY STEP
To change the frequency increment used during scanning and
stepping to a frequency, press 
F+STEP (CALL). The current fre-
quency step appears. Then repeatedly press 
UP or DN or rotate
the tuning control to change the setting. The default...

34
• Replace old ignition wires with new, high-voltage, noise sup-
pression wires.
• Install noise suppressors on your spark plugs, or install new
spark plugs that have built-in noise suppressors.
• If problems persist, check to ensure your alternator and
electrical system are operating correctly. You can reduce
any noise by using bypass capacitors at the various output
voltage points.
Your local RadioShack store carries a wide selection of capaci-
tors and other appropriate noise reduction components. 

35
TROUBLESHOOTING
If your transceiver is not working as it should and it displays an
error message, these suggestions might help you eliminate the
problem. If the transceiver still does not operate properly, take it
to your local RadioShack store for assistance.
Symptom Possible Cause and Solution
Problems with reception
Squelch setting too high. 
Adjust as needed.
Tuned to a non-operating fre-
quency.
Tune to an active frequency.
Antenna not properly attached.
Check and reconnect if needed.
Poor...

36
CARE AND MAINTENANCE 
Your RadioShack 2-Meter FM Mobile Amateur Transceiver is
an example of superior design and craftsmanship. The follow-
ing suggestions will help you care for your transceiver so you
can enjoy it for years.
Keep the transceiver dry. If it gets wet, wipe it dry
immediately. Liquids might contain minerals that
can corrode the electronic circuits.
Use and store the transceiver only in normal tem-
perature environments. Temperature extremes
can shorten the life of electronic devices,...

37
RESETTING THE TRANSCEIVER
If the transceiver’s display locks up or the transceiver does not
work properly after you turn it on, you might need to reset it.
Important: This procedure clears all the information you have
programmed into the transceiver. Before you reset the transceiv-
er, try turning it off then on again to see if it begins working prop-
erly.
To reset the transceiver, turn it off then hold down 
F and turn it on
again. All display elements appear, confirming the reset opera-
tion....

38
SPECIFICATIONS
GENERAL
Frequency:
TX  ................................................  144.000–148.000 MHz
Extended TX Range  ....................  142.000–149.885 MHz
RX ................................................  136.000–174.000 MHz
Frequency Control  .......................... Digital PLL Synthesizer
Display Type .................................................................. LCD
Operating Temperature  ...................................  –4° to 122°F
 (–22.5° to 49.5°C)
Power...

39
TRANSMITTER
Max Power Output:
High  ..................................................................  25 watts
Low  .................................................................... 10 watts
Spurious Emission ..................................  Better than –65dB
Deviation  .................................................................  ± 5 kHz
Battery Drain:
High ............................................................................ 5A
Low...

RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
02A00 Printed in Korea
Limited One-Year Warranty
This product is warranted by RadioShack against manufacturing defects in
material and workmanship under normal use for one (1) year from the date
of purchase from RadioShack company-owned stores and authorized Ra-
dioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED
WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FIT-
NESS...