Digitech AR-1748 User Manual

WORLD B AND RADIO
AM/FM/Shortwave fi eld radio with LCD backlight
OWNER’S MANUAL
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Distributed by: Electus Distribution Pty Ltd 320 Victoria Rd Rydalmere NSW 2116 Australia Ph: 1300 738 555 Fax: 1300 738 500
www.electusdistribution.com.au
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AR-1748
WARNING
• Do not expose this appliance to rain or moisture.
• Do not submerge or expose to water.
• Protect from high humidity and rain.
• Only operate within specied temperature range (0 °C to 40 °C).
• Unplug immediately if liquid has been spilled or object have fallen into the apparatus.
• Clean only with a dry cloth. Do not use detergents or chemical solvents as this might damage the nish.
• Unplug and disconnect external antennas during lightning storms.
• Do not remove cover [or back].
• Refer servicing to qualied service personnel.
3
INSTALLING BATTERIES
The battery compartment is on the back of the radio. Remove it by pressing the two tabs and pulling up. Install only fresh, new alkaline D cells, all of the same brand and type. To prevent battery acid leak­age, follow these instructions. Battery acid leakage is not covered by the radio’s warranty. Never install or replace with batteries of dierent brands and types. Never intermix old batteries with new ones. When not using the radio for more than 30 days, remove the batteries.
USING BATTERIES
Use 6 D size alkaline batteries. Install them with correct polarity us­ing the diagram inside the battery compartment on the back of the radio. Replace them if the battery strength indicator in the display shows one bar or the sound becomes distorted. The radio will turn o automatically if the batteries become too weak.
BATTERY LEVEL INDICATOR
The battery level indicator is in the upper left corner of the display. When batteries are full, “ flashes, it indicates that batteries are low and the radio will soon turn o automatically.
4
” will be displayed in the LCD; if “
USING AC POWER
Plug AC adapter into the socket on the left side of the radio. Use only the AC adapter supplied. When the AC adapter is plugged in, the full power level will show in the upper left corner of the display, looking like a full battery. If you lose the AC adapter that came with the radio, use one with 9 Volt DC output, negative polarity, 500 milliampere and a plug with 5.5 millimeter outer diameter, 2.1 millimeter inner diameter.
POWERING FROM A CAR OR BOAT
Use a DC to DC converter. Output: 9 Volt DC, negative polarity, outer diameter 5.5 millimeter; inner diameter 2.1 millimeter.
TURNING ON AND OFF / SETTING AND DEACTIVATING THE SLEEP TIMER
Turn on the radio by pressing the red POWER & SLEEP button on the front top right corner of the radio. When it turns on you will briefly see a sleep timer symbol in the bottom portion of the display, this is the sleep time and the radio will play for this amount of minutes and then shut o. It can be deactivated by continuously pressing the power button until ‘on’ appears in the bottom of the display; with each press you will see the numbers going down from 90 to 60 to 45 to 30 to 15 to 10 to 5 to 1 minute and then to ‘on’. When ‘on’ appears, stop pressing the button. The sleep timer is now disengaged and you don’t have to change it unless you want a sleep time to appear.
To activate the sleep timer, turn the radio on and press the POWER & SLEEP button continuously until the desired sleep time appears. The radio will play for the specified length of time and automatically shut o. The sleep timer symbol will show in the display, “
”.
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6
TURNING ON AND OFF
Turn on the radio by pressing the red POWER & SLEEP button on the front top right corner of the radio. When the unit is on, press the POWER & SLEEP again to turn the radio o.
SETTING AND DEACTIVATING THE SLEEP TIMER
To activate the sleep timer, turn the radio on and press the POWER & SLEEP button continuously until the desired sleep time appears. The sleep timer symbol will show in the display, “ ”. With each press, the display will show the following on/sleep options: On, 90 to 60 to 45 to 30 to 15 to 10 to 5 to 1 minute and then to ‘on’. The radio will play for the specied length of time and automatically shut o. When ‘on’ appears, the sleep timer will be disengaged.
VOLUME KNOB
Turn up the volume by turning the volume knob clockwise (right), down by turning the knob counterclockwise (left).
POWER FAILURE BACKUP FEATURE
If batteries are in the unit and it is powered via its AC adapter, it will automatically switch to battery use if there is an AC power failure.
7
USING THE LOCK BUTTON
To lock all of the keys and buttons press and hold the LOCK button ”
” (front top of the radio) until you see a symbol of a key appear in the top, middle of the display. Press the same button for 2 seconds to unlock it.
USING THE QUICK TUNE BUTTON
To quickly tune across a band press the Q.TUNE button. It will save you time when going to a frequency on the other end of the band. This works on AM, FM and Shortwave.
THE TUNING KNOB CONTROLS: STOP, SLOW, FAST
Above the tuning knob are the STOP, SLOW and FAST buttons. Pressing STOP locks the tuning dial. Press it again to unlock it. Pressing SLOW or FAST gives you slow tuning or fast tuning. Use which ever one that you prefer.
ANTENNA DX/LOCAL SWITCH
(right side of radio)
If the station you’re listening to is so strong that it sounds distorted, turn this switch to the LOCAL position. Otherwise, leave it on DX, which stands for maximum distance.
8
TUNING IN FM STATIONS
The FM frequency range is from 87.5 to 108 MHz.
Fully extend the telescopic antenna and turn on the radio.
Place the top BANDWIDTH control onto the MONO or STEREO • position. Stereo is needed only when you’re using headphones and STEREO appears above the top left of the frequency in the display. FM mono has better signal and noise ratio as well as anti-multiplex interference.
Tune in the station with the TUNING knob or by pressing the UP/• DOWN button or by pressing and holding the UP/DOWN button for one second to engage auto tuning.
BASS/TREBLE KNOBS
Use these knobs to control the bass and treble response of the radio’s speaker system.
USING THE AM RF GAIN KNOB
When listening to AM (MW) broadcast stations, this control knob should be dialed to or near position 5. If you are listening to a weak station, increase the gain, when listening to extremely strong stations, decrease the gain. For listening to Shortwave stations, place this control to maximum gain and decrease the gain as necessary.
9
TUNING IN MW STATIONS (AM); CHANGING THE TUNING STEPS
MW, or medium wave stations, known as AM stations, range from
une in 9 KHz steps and in other parts of the world they may tune in 10 KHz steps. The radio is set up for 9 KHz tuning by default, but to change the steps to 10 KHz, go into the battery compartment and move the switch from 9 KHz to 10 KHz and then press the reset button with a paper clip. The switch is located on the middle of the ridge between the upper set and lower set of batteries.
Turn on the radio. 1.
Place the top BANDWIDTH switch into the W or N position (wide or 2. narrow). Place bottom BANDWIDTH switch into the MW position.
Place AM/SW RF GAIN switch into the 5 position, higher if necessary. 3.
Tune in the station with the TUNING knob or by pressing the UP/4. DOWN button or by pressing and holding the UP/DOWN button for one second to engage auto tuning.
Use WIDE if no interference is present. Use NARROW if interference is present.
-
520
T
-
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522
1620 KHz in other parts of the world.
10
TUNING IN SW (shortwave) STATIONS
Turn on radio.1.
Place the upper BANDWIDTH switch in the W or N position. 2. Place the lower switch into SW1, SW2 or SW3.
Place AM/SW RF GAIN control into the 10 position; decrease 3. if necessary.
SW appears in frequency range of 1711 to 29999 KHz. 4.
Tune in the station with the TUNING knob or by pressing the UP/5. DOWN button or by pressing and holding the UP/DOWN button for one second to engage auto tuning.
TUNING TO SW FREQUENCY RANGES (BANDS)
Tune to these frequency ranges for best results. The radio can also tune between these ranges.
Meter Band (m) Frequency Best Time of Day
90m 3,200-3,400 kHz
75m 3,900-4,000 kHz
60m 4,750-5,050 kHz night
49m 5,800-6,200 kHz night
41m 7,100-7,500 kHz night
31m 9,500-10,000 kHz night
25m 11,650-12,200 kHz
19m 15,100-15,800 kHz day
16m 17,550-17,900 kHz day
15m 18,900-19,020 kHz
13m 21,450-21,850 kHz day
11m 25,600-26,100 kHz day
OPTIMIZING SHORTWAVE RECEPTION
Shortwave enables listening to broadcasts over vast distances including other countries and continents. The following information will help you get the best results.
During the day, frequencies above 13 MHz are usually best.
At night, frequencies below 13 MHz are usually best.
Around sunset and sunrise, the entire shortwave range may be good.
Getting very close to a window and holding the radio improves
shortwave reception.
STORING AND RETRIEVING STATIONS INTO AND FROM PRESETS (MEMORIES)
Tune to the station that you want to store. Press and release the T.SET button and see ‘Preset’ with a number underneath it flash in the right side of the display. Press the UP or DOWN buttons over and over to find the ‘Preset’ number that you want to store it into. A quick press of the T.SET button will finalize the entry.
Press the PRESET button continuously to retrieve the stations that have been stored. Notice that the frequency in the display changes and the ‘Preset’ number shows on the right side of the display.
A station cannot be erased from memory. Simply store another station over it.
11
SETTING THE CLOCK
The clock works in either the 12 hour or 24 hour mode. To change the clock from one mode to another, turn the radio o, press and hold the UP button for 5 seconds.
To set the clock:
Turn radio o. 1.
Press and hold the T.SET button until the hour starts flashing. 2.
Turn the tuning knob in either direction or press the UP button 3. to set the hour.
Quick press the DOWN button to make the minutes flash and turn 4. the tuning knob to set the minutes
Quick press the T.SET button to finalize the entry. 5.
Do the above steps quickly or the time set mode will exit. If it exits, simply start over.
SETTING THE ALARM CLOCK
There are two alarm clocks, Timer A and Timer B.
Turn the radio o. 1.
Press and hold the TIMER A or TIMER B button until the hour flashes. 2.
Turn the tuning knob in either direction or press the UP button to set 3. the hour.
Quick press the DOWN button to make the minutes flash and turn 4. the tuning knob to set the minutes.
Quick press whichever button you are using, TIMER A or TIMER B, to 5. finalize entry.
12
13
ACTIVATING AND DEACTIVATING THE ALARM CLOCK
Press and release the TIMER A or TIMER B button. ‘Timer A’ or ‘Timer B’ ashes in the display. While it ashes, press ALARM over and over. A bell “ ,” speaker or nothing appears in the display next to ‘Timer A’ or ‘Timer B’. Select the bell icon to activate the alarm and set the alarm to go o with a beeping sound. Select the speaker icon if you wish to wake up to the last radio station tuned to. If nothing is selected the alarm will be deactivated. Set the volume to a level you want to hear.
USING THE SNOOZE FEATURE
To delay the alarm, the snooze feature can be activated by pressing the SNOOZE button when the alarm turns on. Once pressed, the alarm will activate again in 5 minutes. This can be repeated up to 4 times.
USING THE LINE IN/OUT SOCKETS
These sockets are on the right side
The Line-Out socket can be used to feed audio
USING THE EARPHONE JACK
The earphone jack can be used with stereo headphones using an 1/8 inch (3.5 millimeter) plug. FM sound is in stereo if the signal is sent in stereo and the ST position is selected with the BANDWIDTH switch.
An external audio device (such as an MP3 player) can be
connecting an AUX line from the device into the Line-In socket.
speakers.
, an 1/8 inch stereo
amplied external
to
type (3.5 mm).
played by
EXTERNAL ANTENNAS
FM/SW EXT. ANT. – this socket, on the back of the radio is primarily for antennas designed to be fed with 50 or 75 ohm coaxial cable, such as dipoles or comparable antennas. It can also be used for long wire antennas. Use F plugs for feeding this socket.
ANT. SENS SWITCH: EXT or INT
(right side of radio)
Use this switch to enable the use of FM or SW internal or external antennas.
MW EXT. ANT. – This is a 500 ohm impedance socket, for use with long wire antennas.
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15
(back of radio)
Use this F socket to access an amplitude modulated intermediate frequency output for use in receiving DRM signals. It can also be used for other types of radio frequency experimentation.
LIGHT BUTTON
(under LOCK button)
Press this button to light the display for a few seconds. When using the AC adapter pressing it for 3 seconds will permanently light the display.
KEY LIGHT SWITCH
(right side of radio)
Flip this switch to ON to make the keys light when they are pressed. Flip it to OFF to turn o this feature.
TO RESET
If the radio malfunctions or doesn’t work properly, insert a paper clip into the hole on the front lower right side. Make sure the paper clip is inserted until the display reappears.
USING THE AM IF OUT SOCKET
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SPECIFICATIONS
Frequency Coverage: AM 520 - 1710 kHz (10kHz step). • AM 522 - 1620 kHz (9kHz step) FM: 87.5 - 108MHz (100kHz step) SW1 1711 - 10010 kHz SW2 9990 - 20010 kHz SW3 19990 - 29999 kHz
Tuning Steps: Stop/Slow/Fast (3 mode)• Large LCD display with white backlit and signal strength level indicator Memore Presets: 50 total (10 per band) Dual alarm/Sleep timer/Snooze function AM RF Gain/Bass/Treble/Volume adjustable knob Speaker: 5 Watt/4 ohm I/O jack:
3.5mm line in/out jack, 3.5mm earphone jack, DC in jack AM IF output socket,FM/SW ext. antenna socket, MW ext. antenna socket AM dual conversion: 1st IF - 55.845 MHz / 2nd IF - 455 kHz Carrying strap handle Power source: 6 “D” size batteries (not included) 9V 500mA DC (negative tip) Accessories: Owner’s manual AC/DC adapter D size battery adapter Dimensions: L 310mm x W 100mm x H 195mm Weight: 1.70 kg (approx.) without batteries
Specications subject to change without notice
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