Radio Shack DX-392 Manual de usuario

Cat. No. 20-219B

OWNER’S MANUAL

PLL ALL-BAND PORTABLE RECEIVER

Please read before using this equipment.

DX-392

WITH CASSETTE RECORDER

20-219.fm Page 1 Wednesday, August 4, 1999 9:23 AM

FEATURES

Your Radio Shack DX-392 PLL All-

Band Portable Receiver with Cassette

Recorder brings the voices of the world

to you. In the 13 international short-

wave (SW) bands, you can hear news

broadcasts and other programs from

sources such as the British Broadcast-

ing Company, Radio Cairo, and Radio

Moscow.

You can get emergency information

firsthand by listening to amateur radio

broadcasts, which include single side-

band (SSB) voice transmissions and

continuous wave (CW) Morse code

transmissions.

In the longwave (LW) band, you

sometimes hear hurricane reports,

ship-to-shore calls, and other marine

and aeronautical services. You can

tune to local broadcasts in the FM and

medium-wave (MW) bands. (In the

United States, we commonly call the

MW band the AM band.) In addition,

you can use the built-in cassette re-

corder to record your favorite pro-

grams live or at a preset time.

Special features include:

ital S

nthesized Receiver —

ensures accurate, drift-free tuning.

Lar

e, Fast-Response Displa

—

lets you quickly and easily view the

time, band and frequency, signal

strength, and other indicators.

Dual Time — lets you set a primary

clock to your local time and a second-

ary clock to another time zone so you

can quickly check the time in another

part of the world.

Scan Tunin

— lets you quickly find

stations.

Memor

Tunin

— stores up to 54 fre-

quencies in memory so you can quick-

ly select your favorite stations.

Direct-Access Tunin

— lets you use

the keypad to directly enter a frequen-

cy you want to listen to.

Rotar

Tunin

ustment — lets

you select a higher tuning increment

for faster tuning, select a lower tuning

increment for fine tuning, or lock the ro-

tary tuning dial to prevent you from ac-

cidentally changing the frequency.

Control Lock — prevents you from

accidentally changing a setting.

Alarm (Standb

)— lets you set the

buzzer to sound or the receiver to turn

on to wake you at a specified time.

Sleep Timer — lets you set the receiv-

er to turn off after a preset length of

time (15, 30, 60, or 90 minutes), so you

can fall asleep as you listen to it.

Radio Shack is a registered trademark used by Tandy Corporation.

20-219.fm Page 2 Wednesday, August 4, 1999 9:23 AM

MW Step Setting — lets you choose

the correct setting for whatever part of

the world you are in.

AM RF Gain Control — lets you ad-

just the receiver’s sensitivity when you

listen to SW to provide the best possi-

ble reception.

Narrow/Wide Control — lets you re-

duce interference from other stations

when you listen to SW, MW (AM), and

LW broadcasts.

BFO Controls — let you tune to sta-

tions that transmit in continuous wave

(CW) and single sideband (SSB).

Built-In Cassette Recorder — lets

you record and play back programs.

Standby Recording — lets you record

your favorite program at a preset time.

Beat Cut Switch — reduces the hum

or whistling sound sometimes heard

when recording AM broadcasts.

Built-In Condenser Microphone —

lets you make live recordings.

Three Power Options — let you

choose from internal batteries, stan-

dard household AC power (requires an

AC adapter), or DC vehicle battery

power (requires a DC adapter) so you

can use the receiver just about any-

where.

Battery Power Indicator — lets you

know when the batteries need to be re-

placed.

Back-Up Battery Power — keeps the

clock running, protects the stations

stored in memory, and powers the dis-

play if the receiver’s primary power

source is interrupted.

Memo Pad — lets you record helpful

information such as the memory loca-

tion numbers of your favorite stations.

We recommend you record the serial

number of your receiver here. The

number is inside the battery compart-

ment.

Serial Number_________________

20-219.fm Page 3 Wednesday, August 4, 1999 9:23 AM

CONTENTS

Preparation............................................................................................................ 6

Setting the MW (AM) Tuning Increment ........................................................... 6

Installing Back-Up Batteries ............................................................................. 6

Connecting to Primary Power........................................................................... 7

Internal Battery Power .............................................................................. 7

AC Power .................................................................................................. 8

DC Power .................................................................................................. 8

Using the Folding Stand and Memo Pad.......................................................... 9

Usin

the Receiver.............................................................................................. 10

Turning the Receiver On/Off........................................................................... 10

Tuning............................................................................................................. 10

Selecting the Band .................................................................................. 10

Direct-Access Tuning .............................................................................. 10

Using the Rotary Dial .............................................................................. 11

Tuning with the Arrow Keys ..................................................................... 12

Scanning ................................................................................................. 12

Memory Tuning ....................................................................................... 13

Adjusting the Antenna .................................................................................... 13

Connecting an External Antenna.................................................................... 14

Adjusting Special Tuning Controls.................................................................. 14

FM Mono/FM Stereo ............................................................................... 14

AM Narrow/AM Wide .............................................................................. 14

AM RF Gain ............................................................................................ 15

BFO Switch and BFO Dial ...................................................................... 15

Tone ........................................................................................................ 15

Usin

the Clock Radio........................................................................................ 16

Setting the Clocks........................................................................................... 16

Changing the Clock Display .................................................................... 17

Using the Alarm (Standby) Feature................................................................ 17

Setting the Alarm .................................................................................... 17

Silencing the Alarm ................................................................................. 18

Turning the Alarm Off/On ........................................................................ 18

Using the Sleep Timer.................................................................................... 18

Makin

a Recordin

............................................................................................ 19

Loading a Cassette Tape................................................................................ 19

Playing a Cassette Tape................................................................................. 19

Fast-Forward and Rewind ....................................................................... 20

Cue and Review ...................................................................................... 20

20-219.fm Page 4 Wednesday, August 4, 1999 9:23 AM

Recording....................................................................................................... 20

Recording from the Radio ....................................................................... 20

Recording from the Radio Using the Standby Feature ........................... 21

Recording AM Broadcasts ...................................................................... 22

Recording Using the Built-In Microphone ............................................... 22

Additional Features............................................................................................ 23

Connecting Headphones ............................................................................... 23

Listening Safely ...................................................................................... 23

Lighting the Display........................................................................................ 24

Locking the Controls ...................................................................................... 24

Listening Hints.................................................................................................... 25

Reference Sources ........................................................................................ 25

Frequency Conversion................................................................................... 25

Band Allocations ............................................................................................ 25

Amateur Radio Frequencies ................................................................... 25

International Frequencies ....................................................................... 26

Aircraft Frequencies ............................................................................... 27

Ships and Coastal Station Frequencies ................................................. 27

Time Standard Frequencies ................................................................... 27

Longwave Band ...................................................................................... 27

Listening Guide .................................................................................................. 28

Birdies............................................................................................................ 33

Tape Tips and Techniques................................................................................. 34

Storing Your Cassettes ................................................................................. 34

Erasing Tapes ............................................................................................... 34

Accidental Erasure Prevention ...................................................................... 34

Tape Tension ................................................................................................. 35

Cleaning the Tape Mechanism ...................................................................... 35

Troubleshooting ................................................................................................. 36

Resetting the Radio ....................................................................................... 37

Maintenance........................................................................................................ 38

Caring for the Receiver.................................................................................. 38

The FCC Wants You to Know ........................................................................ 38

Specifications..................................................................................................... 39

20-219.fm Page 5 Wednesday, August 4, 1999 9:23 AM

PREPARATION

SETTING THE MW (AM)

TUNING INCREMENT

In the United States, the Federal Com-

munications Commission (FCC) as-

signs frequencies for stations in the

MW band in 10-kilohertz increments.

(In the United States, we commonly

call the MW band the AM band.) In Eu-

rope and some other parts of the

world, MW frequencies are assigned in

9-kilohertz increments.

The MW STEP switch is located in-

side the battery compartment. Before

you install the back-up batteries, set

the switch to 9k or 10k using the fol-

lowing guidelines:

• If you are in the United States,

Canada, or another North or

South American country, be sure

the switch is set to 10k.

• If you are in a country where

the AM frequency increments

are 9 kHz, set the switch to 9k.

INSTALLING BACK-UP

BATTERIES

Back-up batteries power the receiver’s

clock and the display and save the sta-

tions stored in memory if the receiver’s

primary power source is interrupted.

The receiver uses three AA batteries

for back-up power. For the best perfor-

mance, we recommend alkaline bat-

teries, such as Radio Shack Cat. No.

23-552.

Note: You cannot operate the receiver

using only the back-up batteries. If you

press POWER when the back-up bat-

teries are the only available power

source,

Eflashes on the display.

Follow these steps to install the back-

up batteries.

1. Remove the battery compart-

ment’s cover by pushing the cover

in the direction of the arrow.

2. Install three AA batteries, according

to the polarity symbols (+ and –)

marked next to the compartment.

For easy removal, place the bat-

teries on top of the lift-out ribbon.

20-219.fm Page 6 Wednesday, August 4, 1999 9:23 AM

3. Replace the cover, or install addi-

tional batteries for primary power

as described in “Internal Battery

Power.”

To check the back-up batteries’ power

level, disconnect the receiver from the

primary-power source. Then look at

the receiver’s display. If it is dim, re-

place the back-up batteries.

CONNECTING TO

PRIMARY POWER

You can power the receiver from inter-

nal batteries, standard AC power, or

your vehicle’s battery.

Internal Battery Power

Your receiver uses four D batteries.

For the best performance, we recom-

mend alkaline batteries, such as Radio

Shack Cat. No. 23-550.

Follow these steps to install batteries

for use as the primary power source.

1. Remove the battery compart-

ment’s cover by pushing the cover

in the direction of the arrow.

2. Slide four D batteries into the

compartment, according to the

polarity symbols (+ and –) marked

next to the compartment. For easy

removal, place the batteries on

top of the lift-out ribbon.

3. Replace the cover.

To check the primary-power batteries,

turn off the receiver. The battery pow-

er indicator appears on the display for

several seconds. Fresh batteries

show a power level of 7. If the indica-

tor shows a power level of 2 or below,

replace the primary-power batteries.

Note: If you press RADIO POWER to

turn on the receiver when the primary-

power batteries are dead, Eflashes on

the display if back-up batteries are in-

stalled.

AC Power

With an optional AC adapter, such as

Radio Shack Cat. No. 273-1664, you

can power the receiver from standard

AC power.

Caution: You must use an AC adapter

that supplies 6 volts with the center tip

set to negative. It must deliver at least

400 milliamps, and its plug must prop-

erly fit the receiver’s DC IN 6V jack. Us-

ing an adapter that does not meet

these specifications could damage the

20-219.fm Page 7 Wednesday, August 4, 1999 9:23 AM

receiver or the adapter.

Follow these steps to use AC power.

1. Set the adapter’s voltage switch to

6V.

2. Line up the 5.5 mm outer diam-

eter/2.1 mm inner diameter

barrel plug with the adapter’s

socket so it reads –TIP, and insert

the plug.

3. Insert the barrel plug into the re-

ceiver’s DC IN 6V jack.

4. Plug the adapter into a standard

AC outlet.

Note: Using an adapter disconnects

the primary power batteries.

DC Power

With an optional DC adapter, such as

Radio Shack Cat. No. 270-1562, you

can power the receiver from your vehi-

cle’s battery.

Cautions:

• You must use a DC adapter that

supplies 6 volts with the center tip

set to negative. It must deliver at

least 400 milliamps, and its plug

must properly fit the receiver’s DC

IN 6V jack. Using an adapter that

does not meet these specifica-

tions could damage the receiver

or the adapter.

• To protect your vehicle’s electrical

system, be sure the adapter is

connected to the cigarette-lighter

socket only when it is also con-

nected to the receiver.

• Follow these steps to use DC

power.

1. Set the adapter’s voltage switch to

6V.

2. Line up the 5.5 mm outer diam-

eter/2.1 mm inner diameter

barrel plug with the adapter’s

socket so it reads –TIP, and insert

the plug.

3. Insert the adapter’s barrel plug

into the receiver’s DC IN 6V jack.

4. Insert the adapter’s plug into the

vehicle’s cigarette-lighter socket.

Note: Using an adapter disconnects

the primary-power batteries.

20-219.fm Page 8 Wednesday, August 4, 1999 9:23 AM

USING THE FOLDING

STAND AND MEMO PAD

You can position the receiver more se-

curely and possibly improve the sound

by resting the receiver on its stand.

Lift the latch on the back of the receiver

to open the stand. You can use the

memo pad under the receiver’s stand

to record helpful information, such as

the memory location numbers of your

favorite stations.

USING THE RECEIVER

TURNING THE

RECEIVER ON/OFF

Press RADIO POWER to turn on the re-

ceiver, then adjust the volume.

The display shows the band, frequen-

cy, and signal strength. (A reading of 7

indicates the strongest signal.)

Press RADIO POWER again to turn off

the receiver.

TUNING

Selecting the Band

Press FM, MW, LW, or SW to select the

band. (Press MW for AM.) To select a

smaller band within the SW band,

press

METER, then enter the desired

band by pressing its labeled button on

the keypad.

Direct-Access Tuning

Follow these steps to directly tune to a

station.

1. Press FREQ. The frequency dis-

play disappears.

20-219.fm Page 9 Wednesday, August 4, 1999 9:23 AM

2. Press the number buttons (and

decimal button where appropriate)

to enter the frequency.

If you make a mistake, press C

(cancel) to erase the last digit.

If you wait more than 15 seconds

to press a button, the previous fre-

quency returns to the display and

you must begin again at Step 1.

3. Press ENTER. The selected fre-

quency appears.

Using the Rotary Dial

You can select a higher or lower fre-

quency by turning the ROTARY TUNING

knob up or down.

Set FAST/FINE/LOCK to selectthe rota-

ry tuning increments or to lock the RO-

TARY TUNING dial. If you select FAST,

the rotary tuning increments are the

same as when you use the MANUAL/

AUTO or keys. If you select

FINE, the tuning increments are small-

er so you can fine tune the frequency,

as shown in the following table.

You can also set FAST/FINE/LOCK to

lock the ROTARY TUNING dial. This

prevents you from accidentally chang-

ing the frequency.

Note: This locks only the ROTARY

TUNING dial. For information about

locking the front-panel buttons, see

“Locking the Controls” on Page 22.

Band Fast Fine

FM 0.1 MHz 0.05 MHz

LW 9 kHz 1 kHz

MW (AM) 9/10 kHz 1 kHz

SW 0.005 MHz 0.001 MHz

20-219.fm Page 10 Wednesday, August 4, 1999 9:23 AM

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