Radio-shack 20-404 User Manual download pdf (Page 11)

Basic Operation

Turning on the Scanner and Setting

Squelch

1. Turn SQUELCH counterclockwise until the indicator

points to MIN.

2. Turn VOLUME clockwise to turn on the scanner. A

welcome message appears. After about 3 seconds,

you might hear a hissing sound. Then adjust

VOLUME to a comfortable listening level.

3. Turn

SQUELCH clockwise, just until the hissing

sound stops.

To perform a quick check of scanner operation, press

. If you are near a NOAA weather station, you should

hear weather information.

n Notes:

• Make sure the scanner’s antenna is connected

before you turn it on.

• To listen to a weak or distant station, turn

SQUELCH counterclockwise.

• If reception is poor, turn

SQUELCH clockwise to cut

out weak transmissions.

• If

SQUELCH is adjusted so you always hear a

hissing sound, the scanner will not scan or search

properly.

Programming Known Frequencies into

Channels

1. Press PGM.

PGM

appears. Enter the channel

number (1–200) where you want to store a

frequency, then press PGM again.

2. Use the number keys and • to enter the frequency

(including the decimal point).

3. Press

ENT to store the frequency into the channel.

4. To program the next channel in sequence, press

PGM and repeat Steps 2 and 3.

n Notes:

• If you made a mistake entering the frequency,

Error

appears and the scanner beeps three times

when you press ENT. Start again from Step 2.

• Your scanner automatically rounds the entered

frequency down to the closest valid frequency. For

example, if you enter a frequency of 151.473, your

scanner accepts it as 151.470.

• If you entered a frequency that is already stored

in another channel, the scanner beeps three times

and displays the lowest channel number where

the frequency is already stored, while

-dUPL-

(duplicate) and the frequency ﬂashes. Press ENT if

you still want to store the frequency. Press TUNE/

CLEAR to cancel.

• Press

•/DELAY to set a two-second delay on this

channel. The scanner stores this setting in the channel.

If you do not have a list of frequencies in your area,

use a Tune search or a Service Bank search to ﬁnd

transmissions. Or refer to an online resource such as

www.radioreference.com.

Searching for Active Frequencies

Tune Search

During a tune search, the scanner tunes up or down

starting from a frequency you specify.

1. Press TUNE.

PSE

and the starting frequency

appear.

2. If you want to change the starting frequency, enter

a new frequency and press ENT.

3. Press

PSE to start tune search. -

- appears on the

display.

4. To change the tuning direction, press e or d.

n Notes:

• Press

•/Delay to turn the two-second delay feature

on and off.

• Press

L/O to lock-out a frequency.

• Press

PSE to pause searching. Press PSE again to

resume.

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Radio-shack 20-404 User Manual Page 11

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