You can make the scanner scan more efficiently by locking out channels
that you have not programmed. Enter the channel number you wish to lock
out, press MANUAL and then press LOCK OUT so that the LOCK OUT indicator
lights. This is also handy for locking out channels that have a
continuous transmission. You can still manually select locked out
channels for listening.
To unlock a channel you have locked, manually select the channel and press
LOCK OUT so that the LOCK OUT indicator goes off.
MANUALLY SELECTING A CHANNEL
You can continuously monitor a single channel without scanning. This is
useful if you hear an emergency broadcast on a channel and do not want to
miss any of the details - even though there might be periods of
silence - or if you want to monitor a channel that you have locked out.
To select a channel to monitor, press MANUAL and advance through the
channels by pressing MANUAL repeatedly, or move directly to a channel by
entering the channel number on the keypad then pressing MANUAL. If the
scanner is scanning and has stopped at the desired channel, press MANUAL
one time.
AUTOMATIC SCAN DELAY
The scanner stops when it finds a signal. It begins scanning other
channels about 3 seconds after the signal ends. The 3-second delay gives
you a chance to receive a reply to the first signal.
A GENERAL GUIDE TO SCANNING
BIRDIES
Birdies are the products of internally generated signals that make some
frequencies difficult or impossible to receive. If you program one of
these frequencies, you hear only noise on that frequency.
If the interference is not severe, you might be able to cut out the birdie
by turning the squelch control clockwise. The most common birdies to
watch for are listed below.
30.300 MHz
31.200 MHz
32.500 MHz
41.600 MHz
52.000 MHz
RECEPTION NOTES
The scanner receives signals that are mainly "line of sight." That means
that you usually cannot hear stations at your listening location that
extend beyond the horizon.
During the summer, you might hear stations in the 30-50 MHz range located
several hundred or even thousands of miles away. This phenomenon is known
as skip, and is caused by summer atmospheric conditions. This type of
reception is unpredictable but often very interesting.
One useful service is the National Oceanic Atmospheric Administration
(NOAA) Weather Radio's continuous weather broadcasts. These broadcasts
PRO-41 10 Channel Programmable Scanner 200-0301 Operation http://support.radioshack.com/support_electronics/doc7/7309.ht
2 of 3 2/12/2014 6:01 P
To Next Page
Loading...
