Tecsun PL-505 Operation Manual

TECSUN TECSUN

PL-505

FM stereo / SW / MW / LW DSP RECEIVER

OPERATION MANUAL

TECSUN ELECTRONIC IND. LTD.

www.tecsunradio.com

[e-mail]

FM STEREO/ SW/ MW/LW DSP RECEIVER

.,

2011.9 VER.1

TECSUN ELECTRONIC IND. LTD.

PL-505

www.tecsunradio.com [e-mail]

PL-505

Functional Block Diagram

PL-505 is using DSP si4734 Microchips (from Silicon Labs in
USA) to digitalize the analog AM/FM broadcasting signal base
on the modern software technology and radio principles. It can
highly improve on radio's sensitivity, selectivity, S/N ratio and
anti-interference.

MW/ LW

CONTR OL LER

INTER FAC E
CONTR OL

Functional Block Diagram

PL-505

ANT

AMPLI FI ER

SW LP F

FM AN T

SPECIFICATIONS

SPECIFICATIONS

1. Frequency range

FM 87~108 MHz

Russia 64~108MHz

Japan 76~108 MHz

Eu, USA 87.5~108 MHz

MW 522~1620 (USA 520~1710) kHz

LW 153~513 kHz

SW 2300~21950 kHz

2. Sensitivity

FM (S/N=30dB) Less than 3μV

MW (S/N=26dB) Less than 1mV/m

LW (S/N=26dB) Less than 10mV/m

SW (S/N=26dB) Less than 20μV

3. Selectivity

FM ＞60 dB (±150kHz)

MW ＞60 dB (BW=3kHz, ±9kHz)

LW ＞60 dB (BW=3kHz, ±9kHz)

SW ＞60 dB (BW=3kHz, ±5kHz)

4. FM Stereo crosstalk Less than 25 dB

5. Memory 550

6. Output (Distortion 10%) ≥200 mW

7. Power UM3 or AA X 2

USB 5V DC

8. Speaker φ50mm, 500mW/16 Ohm

9. Earphone Jack φ3.5mm, 32 Ohm, Stereo type

10. Dimensions Approx. 123(W) X 79(H) X 20(D) mm

11. Weight 175g (excluded batteries)

PL-505 PL-505 25

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TABLE OF CONTENTS

Control Locations……………………………………………….
LCD display …………………………………………………….

How to turn ON/OFF the radio……………………….............

Intelligent volume control……………………….....................

Tune into stations…………………....…………………………

●

ETM (Easy Tuning Mode)

●

Manual tuning

●

Auto browse stations

Working with station memories…………………....................

●

ATS (Auto Tuning Storage)

●

Storing statons manually

●

Semi-auto storing station

Listening to stored stations………………………..............…

●

Manual memory tuning

●

Auto browse memory

Delete memory………………………………………...........…

●

Delete a single memory manually

●

Semi-auto delete memory

●

Delete all memories manually

Sleep function……………………………………............……

Clock Setting…………………………………….................…

Working with alarm ………...…...….....................................

●

Setting the alarm time

●

How to set alarm by radio

●

How to turn off when alarming

How to change the display mode........................................

Key-lock function………………...........................................

FM ST (FM Stereo) ……………………….....................……

AM BW (AM Bandwidth) ………...………………..…………
System setting…………………………………………………
Intelligent charging function………………………….………

How to improve FM / SW reception....................................

Important matters for using batteries………………............

Trouble shooting………………………………………………

Specifications ……………………………………………....…

2
4
5
5
6

9

11

12

14
14
15

16
17
17
17
18
20
21
22
23
24

PL-505 1

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CONTROL LOCATIONS

14

Note:
Yo u can ro ta te the
telescopic antenna in all
direction (360 degree) by
pulling up the bottom of
antenna.

2

TIME

BW

ALARM

FM ST

FM STEREO/ SW/ MW/LW DSP RECEIVER

9

15

16

17

18

LIGHT SET

VF VM ETM

SCAN

DELETE

FM/SW ANT.

DC-IN 5V

MEMORY

POWER

1

DISPLAY

ATS

9/10k

ATS

PL-505

2

3

FM

SET

4

SW

5

678

10111213

19

TUNING

20

VOLUME

PL-505

1

Power

2

Display / Lock

3

FM band & ATS

4

MW/LW band Selection & ATS

5

SW band selection & ATS

6

ETM (Easy Tuning Mode) / 9k or 10k AM tuning

step selection

7

VF (Frequency scan) / Backlight set

8

VM (Memory scan)

9

Time

10

Memory

11

Delete

12

FM ST / AM BW (AM bandwidth)

13

Alarm

14

FM & SW telescopic antenna

15

FM & SW antenna jack

16

Earphone jack

17

USB 5V DC jack

18

Battery compartment

19

Multifunctional tuning knob

20

Volume knob

PL-505 3

LCD DISPLAY

1

2 3 5

17

16

15

Battery consumption indicator /

1

Charging indicator

Sleep timer indicator

2

Alarm on/off indicator

3

4

Key-lock indicator

5

Temperature (Temp.)

6

Signal indicators
dBu: signal strength unit
dB : Signal to Noise Ratio
(S/N) unit

7

Alarm time indicator

8

SW meter band indicator

9

ETM indicator

Tuning speed:

10

" " Slow Tuning
" " Fast Tuning

kHz: frequency unit for MW,

11

LW & SW
MHz: frequency unit for FM

SLEEP

4

6

Temp.

13 12

14

12

Digital number display (4 Digits)

With radio off: world time, alarm
time, temperature
With radio on: word time, signal
strength / SNR, alarm time,
temperature, local time, memory
address, meter band.

13

Preset memory address

14

Digital number display
With radio off: local time
With radio on: frequency display,
band display

15

Band indicator

16

FM stereo status indicator

17

Rechargeable batteries indicator

7

8

9

10

11

PL-505

HOW TO TURN ON/OFF THE RADIO

1. Open the battery compartment
located on the back of the radio,
install 2 x AA alkaline batteries
observing the battery polarity
diagram on the back of the radio.
Close the battery door.

2. Press the [POWER] button to
turn on/off the radio.

Installing batteries

Note:

If the radio is unable to be turned on, please check if the
batteries were installed correctly, battery capacity is
sufficient, and the lock function had been turned on. If the
radio is locked with " " displays on screen, press &
hold the [ ] button to unlock.

Press

INTELLIGENT VOLUME CONTROL

Speaker volume: Volume control range is 0 to 30.
Earphone volume: Volume control range is 0 to 15.

This device is equipped with its own intelligent volume
control function. If the volume is below level 8, it will
maintain the current volume when you plug in the
earphone; however if the volume is above level 8, the
volume will drop to level 8 automatically. You can adjust the
earphone volume according to your own needs.
It is suggested to plug in the earphone first and wear it later
when you want to listen to the radio by earphone.

When the earphone is plugged out, the volume will
automatically set to level 15.

PL-505 5

TUNE INTO STATIONS

Press the [POWER] button to turn on your radio, then
select your desired band by pressing the [FM], [MW]、SW
[ ] or [ ] button. In case of receiving FM/ SW

broadcasting, fully extend the telescopic antenna for a
better reception. When receiving MW(LW) broadcasting,
please rotate the radio or change its location to achieve
optimum reception.
Now, you can turn into your favorite stations with any of the
below tuning methods:

1. ETM (EASY TUNING MODE)

ETM is the unique tuning method designed by Tecsun. It
skillfully combines the reception circuitry & control
procedure to pre-select the suspected radio station and
temporarily auto stores them into the ETM memory (not the
regular 550 memories). This highly enhances the efficiency
when tuning into radio stations.
Please follow below steps to tune into your preferred
frequencies employing ETM:

1. Press the [ETM] button followed
by [ETM] appearing in the display
to enter Easy Tuning Mode.

2. Press & hold the [ETM] button until
the frequency start running to
auto scan and store stations into
ETM memory, within the present
band.

3. When the frequency stop running,
turn around the [TUNING] knob to
select those stored stations.

Notes: While operating ETM to search for stations, a few
stations might be missed if there is interference in the
surrounding. In this case, you can simply key-in the
frequency, then press the [ETM] button to manually store it
into ETM memory.

6

flashing

Preset station
number ETM

PL-505