Using The Main Power Cut-Off Switch; Connecting Earphones Or Headphones; Connecting An External Speaker; Listening Safety - Radio Shack iScan 20-107 User Manual

Using the Main Power Cut-Off Switch

The Main Power Cut-Off switch is only used to prevent battery drain
when iSCAN is not used for long periods of time. Do not use the
Main Power Cut-Off switch on a routine basis.
Always press and hold to turn off iSCAN before switching the
Main Power Cut-Off switch to OFF and before removing the
batteries. Failure to turn off iSCAN using
corrupted memory on the SD card.
w
Warning: The Main Power Cut-Off switch will not protect your
iSCAN from damage due to battery leakage when iSCAN is stored
for long periods of time. Always remove the batteries from iSCAN
when placing it into long-term storage.

Connecting Earphones or Headphones

For private listening, you can plug
earphones or headphones (not supplied) in the HEADPHONE jack
on top of iSCAN. This automatically disconnects the internal speaker.

Connecting an External Speaker

In a noisy area, an amplified speaker (not included, available at
your local RadioShack or RadioShack.com) might provide more
comfortable listening. Plug the speaker cable's
plug into iSCAN's HEADPHONE jack.

Listening Safety

Do not wear headphones, earphones, or earbuds while operating a
motor vehicle or riding a bicycle. This can create a traffic hazard and
could be illegal in some areas. To protect your hearing, follow these
guidelines:
• Do not listen at high volume levels. Extended high-volume
listening can lead to permanent hearing loss.
• Set the volume to the lowest setting. Then turn on your iSCAN
and adjust the volume to a comfortable level.
• Avoid increasing the volume. Your ears will adapt to the volume
level, so a level that does not cause discomfort could still damage
your hearing.
may result in data loss or
1 / inch (3.5 mm) mini-plug
8
/ inch (3.5 mm) mini-
1
8
18

Basic Operation

Turn on iSCAN and Set Squelch

1. Slide Main Power Cut-Off to the ON position.
2. Press and hold .
3. Turn SQUELCH to the midpoint (12 o'clock) position.
Squelch
The higher the squelch is
•
set, the stronger the signal
required to break the
squelch.
To hear weaker signals,
•
turn SQUELCH
counterclockwise to
increase sensitivity
Power
Main Power
Cut-Off
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