Tecsun PL-310 Installation manual

TECSUN
PL-310
FM stereo / SW / MW / LW DSP RECEIVER
OPERATION MANUAL

PL-310 Functional Block Diagram
PL-310 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.

TABLE OF CONTENTS :
CONTROL LOCATIONS..................................................2
LCD DISPLAY.....................................................................4
QUICK START GUIDE........................................................5
TURN THE RADIO ON OR OFF.........................................8
●Manual tuning
●Auto scan stations
●Direct frequency entry
TO STORE STATION........................................................10
●ATS (Auto Tuning Storage) on FM, MW, LW or SW band
●To store a station manually
●To store a station manually
LISTEN TO STATIONS IN THE MEMORY.......................12
●Manual memory search
●Auto scan memory
●Direct memory access
DELETE MEMORY...........................................................13
●Manual delete memory
●To delete stations with auto search memory function
●To delete all memories
SLEEP FUNCTION...........................................................14
CLOCK SETTING.............................................................15
ALARM SETTING.............................................................15
●Select the alarm by radio " " or by buzzer " "
●Set the alarm by radio
●Alarm by buzzer
●Snooze
●To turn off the alarm
DISPLAY MODE................................................................18
USING THE LOCK BUTTON............................................18
USING THE LIGHT BUTTON...........................................18
USING THE FM ST. BUTTON...........................................18
USING THE AM BW BUTTON..........................................19
SYSTEM SETTING...........................................................19
APPLYING INTELLIGENT CHARING FUNCTION............21
IMPORTANT MATTERS FOR USING BATTERIES............21
TROUBLE SHOOTING.....................................................23
"B" SOUND VIA FUNCTIONS..........................................25

CONTROL LOCATIONS
1. Power button
2. Display & Lock button
3. Light / Snooze button
4. Scan Mode button
5. FM ST. button
6. AM BW button
7. FM Band Selector & Auto Tuning Storage button
8. MW/LW Band Selector & Auto Tuning Storage button
9. SW Band & Auto Tuning Storage button
10. Delete button
11. Memory button
12. Numeric Keypad
13. Time Set button
14. Alarm Set button
15. FM & SW Antenna Jack
16. Earphone Jack
17. USB 5V DC-Jack
18. FM & SW Telescopic Antenna
19. Multifunctional Tuning Knob
20. Stand
21. Volume Knob
22. Battery Compartment

LCD DISPLAY
1. Battery consumption indicator
2. Sleep Indicator
3. Alarm indicator
" " alarm by radio
" " alarm by buzzer
4. Temperature (Temp.)
5. AM, PM indicator for 12-hour format clock
6. Signal indicators
dBu: signal strength unit
dB : Signal to Noise Ratio (S/N) unit
7. Alarm indicator
8. Meter band indicator
9. Preset memory address indicator
10. Key-lock indicator
11. Tuning speed
" > " Slow Tuning
" > > " Fast Tuning
12. kHz: frequency unit for MW, LW & SW
MHz: frequency unit for FM
13. 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.
14. Master Digits
With radio off: local time
With radio on: frequency display, band display
15. FM-stereo indicator
16. Band indicator
17. Ni-MH Battery Symbol

QUICK START GUIDE
TIME SETTING
1. Long press [TIME] button until "hour" is flashing in the display. Rotate the [TUNING]
knob to adjust the correct "hour".
2. Short press [TIME] button again, rotate the [TUNING] knob to adjust "minute".
3. Press the [TIME] button again to confirm your time setting.
ALARM SETTING
1. Long press [ALARM] button. Rotate the [TUNING] knob when "hour" is flashing in the
display.
2. Short press [ALARM] button again, the "minute" flashing. Rotate the [TUNING] knob to
adjust the "minute".
3. Short press [ALARM] button again to select 1 ~ 90 minutes of the Alarm's duration.
4. Finally, short press [ALARM] button again to confirm.
Note:
In ALARM section, [ ] means ALARM is set to radio-on; [ ] means ALARM is set to
buzzer, or if the display corner remains blank, which means the alarm is off.
LISTEN TO THE RADIO
1. Short press [POWER] button to turn on your radio.
2. Select FM by pressing the [FM] button, MW and LW by pressing the [MW/LW] button,
SW by pressing the [ ] or [ ] button sequentially until you have selected the
desired meter band (meter band number flashes in the upper right corner of the
display) .
3. Turn the TUNING knob to your desired radio station.
4. You can also direct key-in the frequency numbers by pressing the numeric keys.
5. Adjust the volume level by turning the VOLUME knob up & down.
Note:
Be sure to fully extend the telescopic antenna when listening to SW and FM.
ATS (Auto Tuning Storage) on FM, MW, LW or SW band
1. Turn on the radio, and fully extend the antenna.
2. Short press [FM] button to Select FM band.
3. Long press on [FM] button until frequency number is running on the display. All the
available stations will be stored in the memory automatically. It will stop when it is done.
4. Then use the [TUNING] knob to tune around for those stored stations.
MW, LW or SW ATS is same as the FM ATS.
Special note: There are mode A & mode B during applying ATS in SW.
Mode A : Auto-searching & storing all the radio stations within all meter bands.
Mode B: Auto-searching & storing all the radio stations within present meter band.

otice that Frequency
Special note:
During processing ATS with mode A in FM / MW / LW & SW, pre-stored radio stations
would be deleted & covered automatically by the new searched & stored stations. If ATS
is interrupted or being turned off during process, radio stations without deleted & covered
by ATS would still be kept.
With ATS mode B in SW, it will not delete & cover all existing memories; all the newly
found radio stations would be stored in the blank memories addresses.
STORING FREQUENCIES INTO MEMORY
1. Turn on your radio, and tune into your favorite station.
2. Short press [M] button, with the memory address is flashing in the display, press [M]
button again to confirm.
LISTEN TO STATIONS IN THE MEMORY
1. Turn on the radio, press and release the [SCAN MODE] button with notice that the
PRESET show in the display's upper right corner.
2. Turn the [TUNING] knob to listen to what's you stored.
DELETEMEMORY
1. Turn on the radio and press the [SCAN MODE] button, causing PRESET to appear in
the display's upper right corner.
2. Use the [TUNING] knob to select the memory that you want to delete.
3. Long press [DELETE] button. " DEL " is flashing in the display, press [DELETE] button
again to confirm it.
AUTO SCAN STATION
1. Turn on the radio and press the [SCAN MODE] button with n
flashes.
2. Long press [SCAN MODE] button to search for those available
stations. Auto search will stop on each available station for 3
seconds before it goes on searching for the next available
station.
3. To stop auto search function, simply press any buttons except
[M] button.
AUTO SCAN MEMORY
1. Turn on the radio and press the [SCAN MODE] button, causing
"PRESET" to appear in the display's upper right corner.
2. Long press [SCAN MODE] button until "PRESET" is flashing in
the display. It will search all the stations within the memory, and
stop on each station for 3 seconds.
3. To stop auto search memory, simply press any buttons except
[DELETE] button.

TURN THE RADIO ON OR OFF
1. Installing batteries
The battery compartment is located on the back of the PL-310. To remove the battery
compartment cover, apply thumb pressure and slide it towards the bottom of the radio.
Install 3 AA alkaline batteries into the battery compartment, observing the battery
polarity diagram on the back of the radio.
2. Short press on [POWER] button to turn the radio on or off.
LISTEN TO THE RADIO
Short press [POWER] button to turn on your radio, and select your band by short press on
[FM]、[MW/LW]、SW[ ] or [ ] button. Adjust the volume level. Now, turn in your
favorite station with either one of the following methods:
Method 1: Manual tuning
Rotate the [TUNING] knob to select your station.
FAST/SLOW tuning is shown in the chart below for each band.
Method 2: Auto scan stations
1. Short press [SCAN MODE] button with a "BB" sound.
2. Long press [SCAN MODE] button with a "B" sound to activate the Auto-scan function.
Auto search will stop on each available station for 3 seconds before it goes on searching
for the next available station.
3. To stop auto search function, simply press any buttons except [M] button.

Method 3: Direct frequency entry
Use the numeric keypad to enter the frequency directly.
Note:
No need to enter decimal point for FM Band when input the frequency numbers.
For example, FM 89.0 MHz, Just ENTER 8 9 0 .
Method 4: Manual memory search (see page 12)
Method 5: Auto-scan memory (see page 12)
Method 6: Direct memory access (see page 12)
TO STORE STATION
There are total 500 preset memories within PL-310. For FM, MW, and LW, each band has
100 preset memories; and 200 preset memories for SW.
ATS (Auto Tuning Storage) on FM, MW, LW or SW band
1. Turn on the radio, and fully extend the antenna.
2. Short press [FM] button to select FM band.
3. Long press on [FM] button with a "B" sound and frequency is running on the display. All
the available stations will be stored in the memory automatically. It will stop when it is
done.
4. Then use the [TUNING] knob to tune around for those stored stations.
MW, LW or SW ATS is same as the FM ATS.
Special note: There are mode A & mode B during applying ATS in SW.
Mode A : Auto-searching & storing all the radio stations within all meter bands.
Mode B: Auto-searching & storing all the radio stations within present meter band.
Special note:
1. During the processing ATS with mode A in FM / MW / LW & SW, pre-stored radio
stations would be deleted & covered automatically by the new searched & stored stations.
If ATS is interrupted or being turned off, radio stations without deleted & covered by ATS
would still be kept.
With ATS mode B in SW, it will not delete & cover all existing memories; all the newly
found radio stations would be stored in the blank memories addresses.
2. If there is interference found in surroundings area and ATS is not function properly,
lower down the telescopic antenna to restart the ATS again. (For Turning the radio
body around to other directions in order to receive better frequency in MW / LW).

To store a station manually
1. Turn on your radio, and tune into your favorite station.
2. Short press [M] button with a "B" sound.
3. Short press [M] button again to confirm with a long "B--" sound.
To store station with auto search function
1. Short press the [SCAN MODE] button with a "BB" sound.
2. Long press [SCAN MODE] button with a "B" sound to activate the Auto-scan function.
3. If you want to store that station, simply press on the [M] button to store the station with a
long "B--" sound. Keep store up your stations when auto search is activated unit it is
done.
4. To stop auto search function, simply press any buttons except [M] button.
LISTEN TO STATIONS IN THE MEMORY
Method 1: Manual memory search
1. Short press the [SCAN MODE] button with a "B" sound.
2. Rotate the [TUNING] knob for those stations in the memory.
Method 2: Auto scan memory
1. Short press the [SCAN MODE] button with a "B" sound.
2. Long press the [SCAN MODE] button with a "B" sound to activate the auto scan
memory function. It will search all the stations within the memory, and stop on each
station for 3 seconds.
3. To stop auto search memory, simply press any buttons except [DELETE] button.
Method 3: Direct memory access
1. Short press the [SCAN MODE] button with a "B" sound.
2. Use the numeric keypad to key-in the memory number. For example, if the desired
radio station is in memory number 006, just press 0, 0, 6, and it will go to memory
006.
NOTE:
When " - - - - " appeared in the display with a "B" sound after you key in a number of the
memory, means there is nothing stored.
DELETE MEMORY
Method 1: Manual delete memory
1. Short press the [SCAN MODE] button with a "B" sound.
2. Rotate the [TUNING] knob for those stations in the memory.
3. Long press the [DELETE] button with a "B" sound.
4. Short press [DELETE] button again to confirm with a long "B- -" sound.
Note:
If "DEL" is flashing more than 3 seconds without confirmation, it will exit the delete
function automatically.

Method 2:
To delete stations with auto search memory function
1. Short press the [SCAN MODE] button with a "B" sound.
2. Long press the [SCAN MODE] button with a "B" sound to activate the Auto scan
memory function.
3. If you want to delete that station, simply press [DELETE] button with a long "B--" sound.
4. To stop auto search memory function, simply press any buttons except [DELETE]
button.
Method 3: To delete all memories
1. Short press the [SCAN MODE] button with a "B" sound.
2. Long press [DELETE] button for about 3 seconds with a "BB" sound or until " DEL " and
"ALL" appear in the display.
3. Press [DELETE] button again to confirm.
Note:
If "DEL" is flashing more than 3 seconds without confirmation, it will exit the delete
function automatically.
SLEEP FUNCTION
With sleep function, you can adjust the length of time for the radio to turn off automatically.
Long press the [POWER] button with a long "B- -" sound, rotate the [TUNING] knob to
select time from 1 ~ 120 minutes for sleep timer within 3 seconds.
(select " ON " to turn on the radio permanently)
CLOCK SETTING
The factory has set the clock to function as a 24-hour format clock. If you prefer a 12 hour,
AM/PM clock format, see the section titled CHANGING THE CLOCK FROM 24 TO 12
HOUR FORMAT in the section titled SYSTEM SET CODES.
Method 1:
1. Long press [TIME] button with a "B" sound until you see the "hour" flashing. Rotate the
[TUNING] knob to adjust the correct "hour".
2. Short press [TIME] button again with a "BB" sound, the "minute" flashing. Rotate the
[TUNING] knob to adjust "minute".
3. Short press [TIME] button with a long "B- -" sound to confirm your time setting.
Method 2:
1. Long press [TIME] button with a "B" sound until you see the "hour" flashing.
2. Enter "hour" and "minute" with numbers directly by pressing numeric keys. (For
example, 14:50pm, just enter 1 4 5 0)
ALARM SETTING

1. Long press [ALARM] button with a "B" sound. Rotate the [TUNING] knob when "hour" is
flashing in the display.
2. Short press [ALARM] button again with a "BB" sound, the "minute" flashing. Rotate the
[TUNING] knob to adjust the "minute" .
3. Short press [ALARM] button again with another "BB" sound and notice the alarm's
duration flashing. Rotate the [TUNING] knob to select 1 ~ 90 minutes of the alarm's
duration.
4. Finally, short press [ALARM] button again with a long "B--" sound to confirm.
Note: After the alarm setting, it will auto start the alarm by radio note that " " appears on
the display.
Select the alarm by radio " " or by buzzer " "
1. To activate the alarm by radio, short press [ALARM] button with a "B" sound and
notice that the " " symbol shows up in the Timer display section.
2. To activate the alarm by buzzer, short press [ALARM] button again with a "BB" sound
and notice that the " " symbol appears in the Timer display section.
3. Short press [ALARM] button again with a long "B--" sound and notice nothing appears
in the Timer display section to turn off the alarm.
Set the alarm by radio
1. Turn on the radio, tune into your favorite alarm radio station. Please set the volume at
the noticeable level.
2. Short press [M] button with a "B" sound.
3. Short press [ALARM] button with a "B" sound and notice " " symbol is flashing for
couple seconds. Now this alarm radio station is set.
It will go on when the alarm is activated in either the radio is off, or the radio is on other
station.
Alarm by buzzer
1. When the alarm is activated, "BB" sound will continuously alarmed. It will turn off
automatically according to your setting.
2. If the alarm is activated, when you are listening the radio; this radio will automatically
turn off, and activate the alarm (only "BB" sound will come out).
Snooze
When your alarm functions and [LIGHT/SNOOZE] button is pressed, it allows you to sleep
for 5 more minutes then the alarm sounds again.
TO TURN OFF THE ALARM
When the radio is turned on by the alarm function with radio, you can short press
[POWER] button to continue listening radio afterwards.
Short press [POWER] again to turn off the radio.

When the radio is on by alarm functions with buzzer, you can short press [POWER] button
to turn off the alarm.
DISPLAY MODE
OFF status: Short press [DISPLAY] button to view on Temperature, Alarm time.
ON status: Short press [DISPLAY] button to view on Alarm time, Temperature, Local time,
signal strength/ SNR.
USING THE LOCK BUTTON
Long press [ ] button with a long "B- -" sound and the " " symbol appears in the
display to lock up all keys / buttons.
Long press [ ] button again with a "B" sound to unlock it.
USING THE LIGHT BUTTON
Short press [LIGHT] button with a "B" sound, LCD backlight illuminates for 3 seconds.
Long press [LIGHT] button with a long "B- -" sound, LCD illuminates permanently.
Short press [LIGHT] button again with a "BB" sound to turn off it.
FM ST. (FM STEREO) BUTTON
Short press [FM ST.] button when in the FM band to take the radio in or out of stereo
reception mode. When it's in stereo mode, " " appears over the left side of the
frequency in the display. As long as you are not using headphones or earphones, it can
be left in mono mode.
AM BW (BANDWIDTH) BUTTON
Short press [AM BW] button to choose 6, 4, 3, 2, 1 kHz bandwidth. This may help to
reduce interference on some frequencies. Using WIDE usually results in better audio
fidelity, while using narrow limits the audio fidelity somewhat. You can use it in MW, LW
and SW band.
SYSTEM SETTING
Frequency range setting for FM
Turn off the radio, long press [FM SET] button, until 87.5-108MHz, 64-108MHz,
76-108MHz, or 87-108MHz appears in the display. Quickly keep pressing on the [FM SET]
button to select suitable frequency range for your local FM.
Changing the clock format
Turn off the radio, long press [12/24] button, until " 12 "or " 24 " appears in the display. If "
12" appears in the display, which means the clock system will be in the 12 hour format.
MW(AM) step setting
Turn off the radio, long press [9/10kHz] button until "9kHz" or "10kHz" appear in the
display. If the display shows "10kHz" with degree of Fahrenheit (oF), which means this
radio is set to 10 kHz step for AM with temperature in Fahrenheit (oF. 10kHz step is used
by North America AM broadcast.

Turn LW on/off
Turn off the radio. Press and hold the [MW/LW] button until "ON" or "OFF" appears in the
display，If " OFF" appears in the display, which means LW is turned off.
Turn off the "Bi" sound
Press and hold the [SNOOZE/LIGHT] button until "OFF" or "ON" appears in the display; If
" OFF" appears in the display, which means "Bi" sound is turned off.
This radio bears the intelligent backlight function which backlight would be on for 3
seconds when tuning knob is being rotated or any key is being pressed.
Press & hold key, then symbol “OFF” appears in the display; which means this
intelligent lighting function is being turned off. By pressing & hold key again, symbol
“ON” appears in the display LCD, and this means the intelligent lighting function is on
now.)
Special note: After shutting off the intelligent lighting function, the [LIGHT/SNOOZE]
key is still workable for turning on or off the backlight.
Turning on / off the charging function
Press & hold [ ] key , symbol of“ ” & “ ”to be shown and means recharging
the batteries is now activated. Press & hold [ ] key , “ ” & “ ”sign is
disappeared on the screen, this means regular batteries to be used and charging function
to be turned off.
Special note: Please check the radio default for the batteries type before using the
correct batteries. In case of using rechargeable batteries, you should switch default to
the rechargeable status for batteries. The correct power capacity of rechargeable
batteries would be shown more accurately.
14. Apply the intelligent recharging function (Rechargeable batteries & external
power connectors are sold separately.
1. With radio is turned off, installing 3 x UM3 (AA) rechargeable batteries , press & hold
[] key until symbol“ ”&“ ”appear, this means the charging function is
on.
2. Using any USB 5v external DC power sources to connect this radio for charging,
symbol“”will advance from the bottom to top during power charging. It stops
when batteries are fully charged.
Connect USB 5V to external power
sources
Special note: Using the USB 5V to

connect to the radio as an the external power sources for supplying power to play this
radio
Notes for charging power:
1. Insisting to use up all power with batteries before charging again, this could
extend the life time of battery and keeping them in good conditions.
2. 3 pcs of batteries to be used as a group and don’t separate them to other usage.
Also don’t mix to use batteries with different power capacity
3. Don’t charge on any non-rechargeable batteries in the radio, this will cause an
hazard or damage to your radio.
15. Notes for using batteries
1. If no battery has been installed inside the radio for long time, the clock of radio
would stop. However, pre-stored frequencies are still kept. Clock would work
again after new batteries being installed again, and simply adjust the correct
time for the clock.
2. This radio have AUTO-OFF for INSUFFICIENT POWER function. When the
batteries is going to run out, the radio function would turn off automatically with
flashing symbol “”to alert you for changing new batteries.
3. Mix use of old & new batteries would cause damage of radio and also cause
incorrect display on capacity of power.
4. in case of radio not to be used for a long period, draw out the batteries for
preventing liquid leakage and damaging the parts of radio.
USING THE EXTERNAL ANTENNA SOCKET
The external antenna socket is used to improve shortwave or FM performance.
Caution: Don’t install external FM/ AM antenna in the frequent thunder area
External FM/ AM antenna
Notice: Do not install any external antenna at the area with thunder & lighting.

TROUBLE SHOOTING
QUESTIONS ANSWERS SOLUTIONS
Can not turn on the radio. -no power with the
batteries
-didn't install the
batteries properly
-power button is
locked
-replace the new
batteries
-according to "+" or
"-" sign to install
the batteries again
-press [ ] button
to unlocked
Radio goes off
when you are
listening
-no power with the
batteries
-sleep timer is
activated
-replace the batteries
-turn on the radio
again
Can not store
some stations
using ATS
Some station
store with noise
using ATS
-frequency of stations are
too weak
-there are
interference near
by your area
-search the station
manually
- low down the
antenna or move
to other location
and try again
Only limited FM
stations can be
received in Japan
-FM frequency is
76~90MHz for
Japan
-turn the radio off
and long press on
the [FM SET]
button，short press
[FM SET] button
again to select
76~108MHz
Received very
poor AM in USA
-Because USA is
using 10kHz step
for AM
-turn off the radio
press the [9/10kHz]
button to select
10kHz
When the alarm
activated (alarm
by radio), there is
only noise with
the broadcast
-Did not set the
proper radio station
for the alarm
-Or there are no
broadcasting at
that radio station
-Or you have
travelled to other
city where does
not have a radio
station for your
preset frequency.
-Preset your alarm
station properly
(see the above
setting)
-Make sure it has
radio broadcast in
your location.
-Or set the alarm by
buzzer.
radio malfunction This may caused Remove the battery,

by interference,
and the computer
microchip not
function properly.
then you can reload.
If it is still not able to
work, please contact
your nearest dealer
for customer service.
"B" SOUND VIA FUNCTIONS

SPECIFICATIONS
1. Frequency range
FM 87~108 MHz
Russia 64~108MHz
Japan 76~108 MHz
China,USA87.5~108MHz
MW 522~1620 (USA 520~1710) kHz
LW 153~513 kHz
SW 2300~21950 kHz
2. Sensitivity
FM (S/N=30dB) Less than 2μV
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
MW ＞60 dB
LW ＞60 dB
MW ＞60 dB
4. FM Stereo crosstalk Less than 35 dB
5. Memory 500
6. Output 350 mW
7.Power UM3orAAX3
USB5VDC
8. Speaker Φ57mm, 500mW/16 Ohm
9. Earphone Jack Φ3.5mm, 8~32 Ohm, Stereo type
10. Dimensions Approx. 141(W) X 87(H) X 30(D) mm
11. Weight 187g (Batteries not included)