Roadstar TRA-2350P User manual

TRA-2350P
INSTRUCTION MANUAL
è un marchio depositato di Roadstar S.A. -Svizzera Tutti diritti riservati

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Table of Contents
SPECIAL FEATURES AND FUNCTIONS........................................2-3
COSMETIC AND FUNCTIONS GUIDELINE..................................4-8
POWER SUPPLY METHOD............................................................9-11
POWER ON/OFF UNIT......................................................................12
SELECTION BAND............................................................................13
SEACHING STATION....................................................................14-16
SPECIAL FUNCTION.........................................................................16
ANTENNAUSE………..................................................................17-19
TIME SETTING….......................................................................... 20-21
ALARM TIMER AND SLEEP TIMER.......................................... 22-25
OTHER FUNCTION .......................................................................26-28
INTRODUCTION FOR SPECIAL FEATURE................................29-30
SPECIFICATIONS................................................................................31

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SPECIAL FEATURES AND FUNCTIONS
Built in MCU, can control and display station frequency ,local/world time,
battery capacity and signal strength.
Built in 8 pieces standalone high quality ICs and MOSFETs and make this
unit features high sensitivity, strong interference-free, low background noise
and small distortion etc.
FM: 87.00-108.00MHz, MW: 520-1710 kHz, (10k step), 522-1620 kHz
(9k step) SW 1: 1711-10010kHz, SW 2: 9990-19999 kHz
SW 3: 20000-29999 kHz.
Install FM and SW external antenna jack to proceed with long distance
receiving and connect to local cable FM. MW sets exclusive 500 ohms
external air/ground connector, can improve the sensitivity of MW with
external antenna and ground wire.
FM accuracy 10kHz,AM accuracy 1kHz.
Install AM IF output, can use for extending other functions of AM broadcast,
for example: CW, SSB (single side band), DRM (digital radio mondial)
SSTV (slow scan TV) etc.
AM uses dual conversation PLL technology to get excellent anti-image
rejection, SW>40DB£MW > 60DB
Built in FET equalizer and mixer,MW built-in digital track tuning technology,

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SW built-in anti strong signal interference technology, so AM features very
good interference-free ability.
Special setting selectable wide/narrow IF band width, also adjust RF gain to
get best reception according to the strength or weak of broadcast signal to get
best reception.
Tuning knob can control tuning station frequency..
Double time buzzer, alarm, snooze, program sleep timefunction.
Button hint sound select, key lock feature
Listen to FM stereo station with headphone. The user can shut down FM stereo
to get higher Signal to Noise according to listening to station..
Built in L/R channel output connector, can take this unitas a tuner, connecting
to speaker amplifier to better sound quality.
Built in 5 inch speaker and BTL audio amplifier ,standalone tweeter, woofer
tuningknob to meet the user's different tone requirements.
The backlit LCD can select manually, temporary or permanent lighting two
different lighting methods, button backlight can be control by button
operation.
Multiple power supply method, external 230V AC and 6-9V DC, 4 x R20 size
and 4 x AA alkaline or rechargeable batteries, also features charging .

4

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COSMETIC AND FUNCTIONS GUIDELINE
1 : Telescopic aerial,listening to FM/SW stations, extend and tilt telescopic aerial,
adjust it to a upright positions to obtain best reception.
2 :Snooze button£ in alarm mode, press this button to confirm the snooze mode in
five minutes, Press and hold down this button to confirm the button hint sound
on/off, if the button hint sound is on, press any buttons, the hint sound will be
heard.
3 :LCD screen, display time, frequency, battery capacity and signal strength etc.
4 :Night light button, fast press these buttons will light for 8 seconds, press and
hold
down the buttons for lighting all the time, press the button and the light become
dim when the light is on.
5 :Stop button of tuning knob £ when listening, press this button and tuning
knob cannot tune any frequency.
6 :Slow button of tuning knob £ when listening, press this button and tuning
knob can increase or decrease frequency at slow step (FM 10kHz, AM 1kHz)
7 :Fast button of tuning knob, when listening, press this button and tuning knob
can increase or decrease frequency at fast step (FM 100kHz,SW 5kHz,MW 9kHz
or 10kHz)
8 :Power/ Sleep button £ Power on or off the unit, setting sleep time .

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8 :Local/world time button, press this button to display local/world time, press
this
9: Button for 5 second sto display electronic time shifting. This unit has two time
format selection. The default is local time when the unit is reset.
10 :Key lock button, short, quick press this button to start this function,other
buttons are not valid except light button; press this button for a long time to
cancel..
11 :Key light switch ,set the switch ON and the button light will last for 8
seconds,this function is suitable for using at night.
12 :Local/DX button, suitable for receiving strength or weak signals in different
conditions.
13:Ext./Int. antenna selector, select external or internal antenna according to
different conditions.
14 :Hour button.when adjusting time, used for hour adjustment and increasing,
press and hold down for 5 seconds to confirm 12/24 hour format shift.
15 :Minute button, when adjusting time, used for minute adjustment and
increasing.
16 :Alarm set button, available in displaying timer A/B mode, can set alarm
buzzer, timing turn-on or cancel alarm setting.
17:Time button,press and hold down for a long time to confirm the time

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adjustment, press this button to display electronic clock when listening.
18 :Timer B button, press and hold down this button for a long time to confirm
alarm B adjustment. Press this button to display timer B when listening..
19 :Timer A button,press and hold down this button for a long time to confirm
alarm A adjustment. Press this button to display timer A when listening.
20 :Fast frequency increasing button, when receiving FM frequency at 1000kHz
step; receiving MW frequency at 100KHz step; Receiving SW frequency will
work as meter band.
21:Charger button, when the unit is off, press this button to confirm the charging.
22 :Reset hole, use for reset the unit operation.
23 :Tuning knob, use for time and frequency adjustment.
24 :Volume knob.
25 :Bass knob.
26 :Treble knob
27 :MW/SW gain control knob, adjust this knob to obtain best reception when
listening to MW/SW band..
28 :Stereo headphone jack ㄛlisten to FM stereo station
29 :MW/SW1/SW 2/SW 3 band selector, turn this selector to obtain the desired
band.
30 :FM/AM band switch, push this switch to select the desired FM mono, FM

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stereo,
AM wide and AM narrow.
31 :Handle
32 :FM/SW external antenna socket
33 :MW external antenna socket
34 :AM IF output socket
35 :Battery compartment
36 :Audio output connector
37 :Battery size selector, the battery compartment has two different
battery grooves,can put two different size batteries.
38 :External DC power socket (6-9V)
39 :External AC power socket(230V) .
LCD display indicator diagram
Sleep indicator
St e re o indic a t o r
Ke y lo c k ind ic a t o r
Ti mer A in di cator
Time r B in dic a t o r St at io n sig nal
st re ngt h ind ic at o r
Wo rld time in dic a t o r
Wo rld t ime
zo ne ind ic a t o r
Slo w,fa st ,
st o p in dic a t o r
Fre q ue nc y unit ind ic a to r
FM fre q ue nc y unit
MW/ SW fre q ue nc y unit
Time o r fre que nc y
indic a t o r
1 2 / 2 4 hr a m o r p m
fo rma t ind ic a t o r
Lo c a l t ime
in dic a t o r
M W b a nd
in dic a t o r
FM band
in dic a t o r
SW b a nd
in dic a t o r
Ba t te ry me t e r
in dic a t o r
T imer A
T imer B S te r e o
543210
Ex t . P o we r indic a t o r

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POWER SUPPLY METHOD
1.Battery
1.This unit can select D or AA size
battery to supply power, after putting
battery in the compartment (35) ,push
battery selector switch (37) to the
correct position.
2.This unit features battery meter and
automatically power off the unit when
the power is unsufficient. Putting new
battery, the screenwill display the
icon.
3. If the battery meter displays and flash,
it indicates the unit will power
off automatically after a few minutes
and need to change new battery.
4. Change new battery for 2 seconds,
the battery meter will become
icon

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NOTE:
1.Do not mix old and new battery along.
2.Please pull out battery to avoid the battery leakage and damage inside
components when unused for a long peroid.
3.After changing battery or disconnect external power, the clock can main-
tain 10 minutes, so you have enough time to change new battery.
2. AC Power
When connecting AC plug to
external socket (39) the unit is
operated by AC power. The
power is off accidently or plug is
loose from wall outlet, the built-in
battery will supply power
automatically.

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3. External wall DC power supply (not included)
When connecting DC plug to
DC jack (38) , the unit is operated
by DC power, the power is off
accidently or the plug is loose
from wall outlet, the built-in
battery will supply power automatically.
Please use specified DC power
supply, voltage : 6-9V,current
¡500mA, the central polarity of
plug is negative ( ).
Or the unit or DC power supply may
be damaged, even serious contingency.

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POWER ON/OFF UNIT
1.Power ON unit
Press power/sleep button (8)
the screen will display “60”
and icon, the unit will power
off automatically after 60 minutes
If changing sleep timing , press
Power/Sleep button (8) one by one£
the digit in the screen will change utill
the desired time. The display “ON”
indicates the unit will turn on all the time.
2. Adjust VOLUME
Turning volume knob (24) to
increase or decrease volume;
3.Adjust treble or bass tone
use treble knob (26) or bass
knob (25) to get your favorite
sound quality.

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Selecting FM band
1.In general, if listening to FM
station through built-in speakers,
please shift FM/AM band switch (30)
to FM MONO, because FM MONO
has better S/N and interference-free
than FM STEREO.
2.If listening through earphone or external stereo amplifier, adjust
FM/AM (30) switch to FM ST , so you can listen to FM stereo stations.
Selecting AM band
In general, turn FM/AM switch (30) to
AM narrow band. Then adjust
MW/SW1/SW2/SW3 switch (29), select
you desired MW,SW1,SW2 or SW3.
If you feel the sound quality is not
good, you can adjust FM/AM switch (30) to AM wide band to get better sound
quality.
NOTE:1.Setting AM narrow band”, can receive more clear station sound;
2.Setting AM wide band”, can receive better sound quality.

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SEARCHING STATION
Listening to the radio,press fast or slow button can select fast or slow search also
use fast tuning button to get your desired station. You can confirm the best tuning
effect according to signal strength icon or accurate frequency and actual hear
feeling.
Note, this unit apply for PLL, can fix frequency excursion problem.

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1. When the radio is turned on ,press slow button (6) ,display “SLOW” at this
time, turn tuning knob to increase and decrease frequency, the step is FM
10kHz, MW 1kHz, SW 1kHz.
2. When the radio is turned on, press fast button (7),display “FAST” , turn tuning
knob toincrease or decrease frequency, the step is FM 100kHz,MW 9 kHz
9K step or 10KHz 10K step SW 5KHz.
3.When the radio is turned on, press STOP button (5) , display “STOP” the tuning
knob will be locked.
4 . When the radio is turned on, press fast frequency increasing button (20).
For FM and MW band, the step is FM 1000KHz, MW 100KHz; for SW band,
changing by meter band form..
MW/SW gain control
Receiving MW, adjust MW/SW gain control
knob (27) to ”MAX, the sensitivity is the best.
If the signal is strong, may cause signal overload,
the sound will distorted, at this time, adjust this knob
anti-clockwise to solve overload and distortion problem.
If there exists serious electronic magnet
interference in this environment, suitable to
adjust MW/SW gain control knob (27) (see

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left) to reduce the sensitivity and interference.
AM Local/DX selector
This unit is installed Local/DX switch (12),
the main purpose is to overcome strong
signal interferes with MW station(12), in
general, set Local/DX switch (12) to DX.
If encounter strong signal FM station, VHF
TV,BP pager and UHF signal interference,
set switch (27) to local .In the mean time,
adjust MW/SW gain control knob to
control any interferences effectively.
AUDIO Output
This unit is installed L/R output connector,
convenient (36) to connect to external
stereo amplifier. Listening to FM stereo
program, set FM/AM switch (30) to ST,
at this time, the screen will display stereo
icon. If the signal is too weak or not stereo

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station, the screen will not display stereo. To receive signal through FM DX,
set FM/AM switch (30) to MONO to get higher S/N.
The volume control will not change audio output signal.
ANTENNA USE
1. Listen to FM broadcast
1. This unit installs telescopic
Aerial (1) to receive FM
stations, when listening,can
pull out telescopic aerial (1).
2. In case of dense stations,
adjust the direction of aerial (1)
and shorten it to avoid interferences between adjacent stations and get best
reception.

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2. Listening to MW broadcast
This unit receives MW broadcast with ferrite bar inside unit, has great effection
with directions. Suggest to adjust the unit's placement to get best reception.
3. Listening to SW broadcast
When listening to SW stations,pull out telescopic aerial andkeep it vertical to get
best reception.

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4. External FM/SW antenna
This unit is installed external FM/SW
antenna jack (32) (FM 75 Ohm SW 50 Ohm),
can connect outdoor antenna, at this
time, set antenna switch (13) to External
place .In FM mode, can proceed with
long distance signal receiving (short
for FM DX), also connect to local cable
FM (call for CABLE FM).
5. External MW antenna
This unit is installed 500 Ohm external MWantenna
jack ( 33), please connect external antenna as
shown right.
6. AM IF Output
This unit is built in AM IF output (34),output AM
455KHz IF signal,can use for extending other
functions of AM band, for example: SSB (single
side band), DRM (digital radio mondial), SSTV
(slow scan TV) etc.(Refer to the details of related
documents).