RadioShack Pro 2049 Programmable Scanner Owners Manual

31
VHF High Band (148–174 MHz)
148.050–150.345  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   CAP, MAR, MIL
150.775–150.790  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
150.815–150.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOW, Oil Spill Cleanup
150.995–151.475  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

32
ULTRA HIGH FREQUENCY (UHF) — (300 MHz–512 MHz)
U. S. Government Band (406–450 MHz)
406.125–419.975   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, USXX
70-Centimeter Amateur Band (420–450 MHz)
420.000–450.000   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  HAM
Low Band (450–470 MHz)
450.050–450.925   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

33
AVOIDING IMAGE FREQUENCIES
You might discover one of your regular stations on another frequency that is not list-
ed. It might be what is known as an image frequency. For example, you might find
a service that regularly uses a frequency of 431.975 also on 474.775.
To see if it is an image, do a little math.
Note the new frequency.  474.775
Double the intermediate frequency of 21.4 MHz (42.800)
and subtract it from the new frequency. –42.800
If the answer is the regular frequency,  431.975
then you...

34
TROUBLESHOOTING
If your scanner is not working as it
should, these suggestions might help
you eliminate the problem. If the scan-ner still does not operate properly,
take it to your local RadioShack store
for assistance. 
SYMPTOM SUGGESTION
Scanner is on, but will not scan. Be  sure 
SQUELCH is adjusted proper-
ly. See “Turning On the Scanner/Set-
ting Volume and Squelch” on Page 17.
Scanner receives stations poorly or not 
at all.Check the antenna (indoor or outdoor).
Signals may be blocked from...

35
CARE AND MAINTENANCE
Your RadioShack PRO-2049 90-Channel Programmable Home Scanner is an ex-
ample of superior design and craftsmanship. The following suggestions will help
you care for your scanner so you can enjoy it for years.
Keep the scanner dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Use and store the scanner only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices and...

36
SPECIFICATIONS
Frequency Coverage:
VHF Lo  .....................................................................  29.7
–50 MHz (in 5 kHz steps)
Amateur Radio  .........................................................  29
–29.7 MHz (in 5 kHz steps)
50
–54 MHz (in 5 kHz steps)
144
–148 MHz (in 5 kHz steps)
420
–450 MHz (in 12.5 kHz steps)
Aircraft .........................................................  108
–136.975 MHz (in 12.5 kHz steps)
Government...

37
Squelch Sensitivity:
Threshold  ...............................................................................  Less than 0.4 m
V
Tight  ......................................................................................... (S + N)/N 25 dB
Air ............................................................................................. (S + N)/N 17 dB
Antenna Impedance  .................................................................................. 50 Ohms
Audio Power...

38
NOTES
20-419.fm  Page 38  Wednesday, March 24, 1999  2:43 PM 

39
20-419.fm  Page 39  Wednesday, March 24, 1999  2:43 PM 

RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
UBZZ01295ZZ
03A99 Printed in the Philippines
Limited One-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for one (1) year from the date of purchase from RadioShack company-owned
stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING
THOSE OF...