RadioShack Pro 70 Portable Scanner Reciever Owners Manual

41
PTR .......................................................... Private Trunked
ROAD................................Road & Highway Maintenance
RTV ......................... Radio/TV Remote Broadcast Pickup
TAXI ............................................................. Taxi Services
TELB ..................................................... Mobile Telephone
(Aircraft, Radio Common Carrier, Landline companies)
TELC ......................................................Cordless Phones
TELM...

42
47.020–47.400 ........................................................... PUB
47.420 .............................................. American Red Cross
47.440–49.580 ...................................................IND, PUB
49.610–49.990 ................................................. MIL, TELC
6-Meter Amateur Band  —  (50–54 MHz)
50.00–54.00 .............................................................. HAM
U.S. Government Band (138–144 MHz)
137.000–144.000...

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159.480 ....................................................................... OIL
159.495–161.565 .................................................... TRAN
161.580 ....................................................................... OIL
161.600–162.000 ............................................ MARI, RTV
162.0125–162.35 ................................ GOVT, MIL, USXX
162.400–162.550 ................................................... WTHR
162.5625–162.6375 ............................ GOVT,...

44
453.0125–453.9875 ...................................................PUB
454.000 ....................................................................... OIL
454.025–454.975 ..................................................... TELB
455.050–455.925 ....................................................... RTV
457.525–457.600 .......................................................BUS
458.025–458.175 ...................................................... MED
460.0125–460.6375...

45
AVOIDING IMAGE FREQUENCIES
You might discover one of your regular stations on anoth-
er frequency that is not listed. This might be what is known
as an image frequency. For example, you might find a ser-
vice that regularly uses a frequency of 453.275 also on
474.675.
To see if it is an image, do a little math.
Note the new frequency.  474.675
Double the intermediate frequency
of 10.7 MHz (21.400) and subtract it
from the new frequency. –21.400
If the answer is the regular frequency,  453.275
then you...

46
FREQUENCY CONVERSION
The tuning location of a station can be expressed in fre-
quency (kHz or MHz) or in wavelength (meters). The fol-
lowing information can help you make the necessary
conversions.
1 MHz (million) = 1,000 kHz (thousand)
To convert MHz to kHz, multiply the number of MHz by
1,000:
30.62 MHz ´ 1000 = 30,620 kHz
To convert from kHz to MHz, divide the number of kHz by
1,000. 
127,800 kHz ¸ 1000 = 127.8 MHz
To convert MHz to meters, divide 300 by the number of
MHz.
300 ¸ 50 MHz = 6 meters...

47
TROUBLESHOOTING
If your scanner is not working as it should, these sugges-
tions might help you eliminate the problem. If the scanner
still does not operate properly, take it to your local Ra-
dioShack store for assistance.
PROBLEMPOSSIBLE 
CAUSESREMEDIES
Scanner is 
totally inop-
erative.The batteries 
are dead.Replace the batter-
ies with fresh ones 
or recharge the bat-
tery pack.
The optional 
AC or DC 
power adapter 
is not con-
nected.Be sure the adapter 
is fully inserted into 
the 
PWR/DC 9V...

48
Keys do not 
work or dis-
play 
changes.Undetermined 
error.Turn the scanner 
off then on again, 
or reset the scan-
ner (see “Reset-
ting/Initializing the 
Scanner” on Page 
49).
Scanner is 
on but will 
not scan.
SQUELCH is not 
correctly 
adjusted.Adjust SQUELCH 
clockwise (see 
“Turning On the 
Scanner and Set-
ting SQUELCH” on 
Page 21).
In the scan 
mode, the 
scanner 
locks on fre-
quencies 
that have an 
unclear 
transmis-
sion.Birdies. Avoid program-
ming frequencies 
listed under “Birdie...

49
RESETTING/INITIALIZING THE 
SCANNER
If the scanner’s display locks up or does not work properly
after you connect a power source, you might need to reset
or initialize the scanner.
IMPORTANT!
 If you have problems, first try to reset the
scanner (see “Resetting the Scanner”). If that does not
work, you can initialize the scanner (see “Initializing the
Scanner” on Page 50); however, this clears all information
stored in your scanner’s memory.
Resetting the Scanner
1. Turn off the scanner, then turn it...

50
Initializing the Scanner
Caution:
 This procedure clears all information you stored
in the scanner’s memory. Initialize the scanner only when
you are sure the scanner is not working properly.
1. Turn off the scanner, then turn it on again.
2. Press and hold 
CLEAR.
3. While holding down 
CLEAR, insert a pointed object,
such as a straightened paper clip, into the reset
opening on the side of the scanner and gently press
then release the reset button inside the opening.
4. When the display reappears,...