RadioShack Pro 28 Programmable Scanner Reciever Owners Manual

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Specified Intervals
Frequencies in different bands are accessible only at specific intervals.
For example:
BAND ALLOCATION
To help decide which frequency ranges to scan, use the following listing
of the typical services that use the frequencies your scanner receives.
These frequencies are subject to change, and might vary from area to
area. For a more complete listing, refer to the “Police Call Radio Guide
including Fire and Emergency Services,” available at your local Radio
Shack store.
Abbreviations Services
BIFC  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Boise (ID) Interagency Fire Cache
BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Business
CAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Civil Air Patrol
CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Citizens Band
CCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Common Carrier
CSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Conventional Systems
CTSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Conventional/Trunked Systems
FIRE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Fire Department
HAM  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amateur (Ham) Radio
GOVT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Government
GMR  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Mobile Radio
GTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Trunked
IND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Industrial Services
 . . . . . . . . . . . . .  (Manufacturing, Construction, Farming, Forest Products)
MAR  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Military Amateur Radio
MARI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maritime Limited Coast
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  (Coast Guard, Marine telephone, 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shipboard Radio, Private stations)
MARS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Military Affiliate Radio System
MED  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Emergency/Medical Services
MIL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. Military
MOV  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motion Picture/Video Industry
NEW  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New Mobile Narrow
NEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Relay Press (Newspaper reporters)
OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Oil/Petroleum Industry
POL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Police DepartmentBand Type Specified Interval
VHF, HAM, and Government 5.0 kHz steps
All Others 12.5 kHz steps
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PUB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Public Services
 . . . . . . . . . . . .  (Public Safety, Local Government, Forestry Conservation)
PSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Public Safety
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Telephone Maintenance
TOW  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Tow Trucks
TRAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Transportation Services
 . . . . . . . . . . . . . . . . . . . . . . .(Trucks, Tow Trucks, Buses, Railroad, Other)
TSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Trunked Systems
TVn  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM-TV Audio Broadcast
USXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Government Classified
UTIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power & Water Utilities
WTHR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Weather
VERY HIGH FREQUENCY (VHF) — (30 MHz–300 MHz)
VHF Low Band — (29.7–50 MHz — in 5 kHz steps)
29.900–30.550  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
30.580–31.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, PUB
32.000–32.990  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
33.020–33.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS, IND, PUB
34.010–34.990  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
35.020–35.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS, PUB, IND, TELM
36.000–36.230  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
36.250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Oil Spill Clean up
36.270–36.990  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
37.020–37.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  PUB, IND
38.000–39.000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
39.020–39.980  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  PUB
40.000–42.000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, MIL, MARI
42.020–42.940  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  POL
42.960–43.180  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IND
43.220–43.680  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  TELM, IND, PUB
43.700–44.600  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  TRAN
44.620–46.580  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POL, PUB
46.600–46.990  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, TELC
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 (137–144 MHz)
137.000–144.000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
2-Meter Amateur Band (144–148 MHz)
144.000–148.000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  HAM
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VHF High Band (148–174 MHz)
148.050–150.345  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CAP, MAR, MIL
150.775–150.790  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
150.815–150.965  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOW
150.980 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Oil Spill Clean up
150.995–151.130  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ROAD
151.145–151.475  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POL
151.490–151.955  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, BUS
151.985 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  TELM
152.0075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
152.030–152.240  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELB
152.270–152.465  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, TAXI
152.480 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS
152.510–152.840  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELB
152.870–153.020  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IND, MOV
153.035–153.725  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, OIL, UTIL
153.740–154.445  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  PUB, FIRE
154.490–154.570  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, BUS
154.585 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Oil Spill Clean-Up
154.600–154.625  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS
154.655–156.240  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED, ROAD, POL, PUB
156.255 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  OIL
156.275–157.425  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MARI
157.450 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
157.470–157.515  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOW
157.530–157.725  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IND, TAXI
157.740 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS
157.770–158.100  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELB
158.130–158.460  . . . . . . . . . . . . . . . . . . . . . . . . . . BUS, IND, OIL, TELM, UTIL
158.490–158.700  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELB
158.730–159.465  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POL, PUB, ROAD
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, MIL, USXX
162.6625 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
162.6875–163.225  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL, USXX
163.250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
163.275–166.225  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL, USXX
166.250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, RTV, FIRE
166.275–169.400  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, BIFC
169.445 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Wireless Mikes
169.500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT
169.505 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Wireless Mikes
169.55–169.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL, USXX
170.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  BIFC
170.025–170.150  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, RTV, FIRE
170.175–170.225  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT
170.245–170.305  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Wireless Mikes
170.350–170.400  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, MIL
170.425–170.450  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  BIFC
170.475 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PUB
170.4875–173.175  . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, PUB, Wireless Mikes
173.225–173.375  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MOV, NEWS, UTIL
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173.3875–173.5375  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MIL
173.5625–173.5875  . . . . . . . . . . . . . . . . . . . . . . . . . . MIL Medical/Crash Crews
173.60–173.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT
ULTRA HIGH FREQUENCY (UHF) (300 MHz–3 GHz)
U. S. Government Band (406–420 MHz)
406.125–419.975  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GOVT, USXX
70-cm Amateur Band (420–450 MHz)
420.000–450.000  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  HAM
Low Band (450–470 MHz)
450.050–450.925  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RTV
451.025–452.025  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IND, OIL, TELM, UTIL
452.0375–453.00  . . . . . . . . . . . . . . . . . . . . . . .  IND, TAXI, TRAN TOW, NEWS
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  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FIRE, POL, PUB
460.650–462.175  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS
462.1875–462.450  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  BUS, IND
462.4625–462.525  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IND, OIL, TELM, UTIL
462.550–462.725  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GMR
462.750–462.925  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS
462.9375–463.1875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
463.200–467.925  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS
FM-TV Audio Broadcast, UHF Wide Band (470–512 MHz)
(Channels 14 through 69 in 6 MHz steps)
475.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 14
481.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 15
487.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 16
..
..
511.750  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 20
Note: Some cities use the 470–512 MHz band for land/mobile service.
20-508.fm  Page 34  Wednesday, August 4, 1999  1:50 PM 
						

							35
AVOIDING IMAGE FREQUENCIES
You might discover one of your regular stations on another frequency
that is not listed. It might be what is known as an image frequency. For
example, you might find a service that regularly uses a frequency of
453.075 also on 474.675.
To see if it is an image, do a little math.
Note the new frequency.  474.975
Double the intermediate frequency of 10.85 MHz (21.700)
and subtract it from the new frequency. –21.700
If the answer is the regular frequency,  453.275
then you have tuned to an image.
Occasionally, you might get interference on a weak or distant channel
from a strong broadcast 21.7 MHz below the tuned frequency. This is
rare, and the image signal is usually cleared whenever there is a broad-
cast on the actual frequency.
FREQUENCY CONVERSION
The tuning location of a station can be expressed in frequency (kHz or
MHz) or in wavelength (meters). The following information can help you
make the necessary conversions.
1 MHz (million) = 1,000 kHz (thousand)
To convert MHz to kHz, multiply by 1,000:
9.62 MHz ´ 1000 = 9620 kHz
To convert from kHz to MHz, divide by 1,000:
2780 kHz ¸ 1000 = 2.780 MHz
To convert MHz to meters, divide 300 by the number of megahertz:
300 ¸ 7.1 MHz = 42.25 meters
20-508.fm  Page 35  Wednesday, August 4, 1999  1:50 PM 
						

							36
TROUBLESHOOTING
If you have problems, here are some suggestions that might help. If
none of these suggestions help, take your scanner to your local Radio
Shack store for assistance.
PROBLEM POSSIBLE CAUSE REMEDY
Keys do not work or 
display changes at 
random.Undetermined error. Reset the scanner (see 
“Resetting the Scanner”).
Scanner is on but 
will not scan.The 
SQUELCH control is 
not correctly adjusted.Adjust SQUELCH clockwise. 
Scanner is totally 
inoperative.No power. • Check the batteries, or 
make sure the scanner 
is plugged into a working 
AC or DC outlet.
• Recharge the recharge-
able batteries or replace 
the non-rechargeable 
batteries.
The optional AC or DC 
power adapter is not 
connected.Be sure the adapter is fully 
inserted into the DC 12V 
jack.
The scanner’s dis-
play dims or the 
scanner sounds a 
tone every 15-30 
seconds.Batteries are not cor-
rectly installed.Make sure the batteries’ + 
and – terminals are proper-
ly aligned.
Batteries need to be 
replaced.Insert new batteries or re-
charge rechargeable bat-
teries.
Poor or no recep-
tion.Environment is not suit-
able for reception by the 
scanner. Batteries are 
weak or dead.Relocate the scanner and 
try again. 
Improperly connected 
antenna.Be sure the antenna is 
properly connected.
20-508.fm  Page 36  Wednesday, August 4, 1999  1:50 PM 
						

							37
RESETTING THE SCANNER
If the scanner’s display locks up or does not work properly after you con-
nect power, you might have to reset the scanner. 
Caution:
 This procedure clears all the information you have pro-
grammed into the scanner. Before you reset the scanner, try turning it
off and on to see if it begins working properly. Use the following proce-
dure only when you are sure your scanner is not working properly.
1. Turn off the scanner.
2. While you press and hold down the 
2 and 9 keys, turn on the scan-
ner.
PROBLEM POSSIBLE CAUSE REMEDY
Keypad does not 
work.The keylock function is 
activated.Press 
KEYLOCK until   dis-
appears from the display to 
turn off the keylock.
 flashes on the dis-
playThe batteries are weak. Recharge the recharge-
able batteries, or replace 
the non-rechargeable bat-
teries. 
Error appears on 
the display.Programming error. Reprogram the frequency 
correctly.
In the scan mode, 
the scanner locks 
on frequencies that 
have an unclear 
transmission.Programmed frequen-
cies are the same as 
“birdie” frequencies.Avoid programming fre-
quencies listed under “Bird-
ie Frequencies” or only 
listen to them manually. 
K
B
20-508.fm  Page 37  Wednesday, August 4, 1999  1:50 PM 
						

							38
CARE AND MAINTENANCE
Your Radio Shack PRO-28 30 Channel Direct Entry Programmable
Scanner is an example of superior design and craftsmanship. The fol-
lowing 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 immedi-
ately. 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(, damage batteries,) and dis-
tort or melt plastic parts.
Keep the scanner away from dust and dirt, which can
cause premature wear of parts.
Handle the scanner gently and carefully. Dropping it
can damage circuit boards and cases and can cause
the scanner to work improperly.
Use only fresh batteries of the required size and type.
Batteries can leak chemicals that damage your scan-
ner’s electronic parts.
Wipe the scanner with a damp cloth occasionally to
keep it looking new. Do not use harsh chemicals, clean-
ing solvents, or strong detergents to clean the scanner.
Modifying or tampering with your scanner’s internal components can
cause a malfunction and might invalidate the scanner’s warranty and
void your FCC authorization to operate it. If your scanner is not operat-
ing as it should, take it to your local Radio Shack store for assistance.
20-508.fm  Page 38  Wednesday, August 4, 1999  1:50 PM 
						

							39
SPECIFICATIONS
Frequency Coverage:
29–54 MHz (in 5 kHz steps)
137–174 MHz (in 5 kHz steps)
406–512 MHz (in 12.5 kHz steps)
Channels of Operation  . . . . . . . . . . . . . . . . . . . . . . . . . . .   30 channels
Sensitivity: 
(FM: 20 dB S/N at 3 kHz deviation):
29–54 MHz  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.4 mV
137–174 MHz  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.5 mV
406–512 MHz  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.6 mV
Selectivity:
±10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  –6 db
±17 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  –50 db
Scan Speed  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15 Channels/Sec.
Search Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20 Steps/Sec.
Delay Time  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2 Seconds
Acceptable RF Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . .  ±6 kHz
IF Frequencies  . . . . . . . . . . . . . . . . . . . . . . . .  10.85 MHz and 450 kHz
Squelch Sensitivity: Threshold . . . . . . . . . . . . . . . . . . Less than 0.4 mV 
Tight (S+N)/N  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dB
Built-in Speaker  . . . . 1
9/16 inches (4 cm) 8 Ohm, 0.5 W, Dynamic Type
Power Requirement  . . . . . . . . . . . . . . DC 4 AA Batteries (6.0 VDC), or
4 AA Rechargeable Ni-Cd Batteries (4.8 VDC), or
Vehicle Battery DC Adapter (Cat. No. 270-1533), or
AC Adapter (Cat. No. 273-1652)
Current Drain:
Squelched . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45 mA
Full Volume Unsquelched  . . . . . . . . . . . . . . . . . . . . . . . . .  125 mA
Dimensions (HWD) . . . . . . . . . . . . . . . . . . . .   6
3/8 ´ 211/16 ´ 19/16 Inches
(162 ´ 68.5 ´ 39 mm)
Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8.8 oz (250 g)
Specifications are typical; individual units might vary. Specifications are
subject to change and improvement without notice.
20-508.fm  Page 39  Wednesday, August 4, 1999  1:50 PM 
						

							RADIO SHACK
A Division of Tandy Corporation
Fort Worth, Texas 76102
UBZZ01255ZZ
9A7 Printed in the Philippines
Limited One-Year Warranty
This product is warranted by Radio Shack against manufacturing defects in material
and workmanship under normal use for one (1) year from the date of purchase from
Radio Shack company-owned stores and authorized Radio Shack franchisees and
dealers. EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS
WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING THOSE OF MER-
CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN
DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CON-
TAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RADIO SHACK SHALL HAVE
NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON
OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DI-
RECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF THE PRODUCT OR
ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING, BUT NOT
LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS OF
TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RADIO SHACK HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the
exclusion of incidental or consequential damages, so the above limitations or exclu-
sions may not apply to you.
In the event of a product defect during the warranty period, take the product and the
Radio Shack sales receipt as proof of purchase date to any Radio Shack store. Radio
Shack will, at its option, unless otherwise provided by law: (a) correct the defect by
product repair without charge for parts and labor; (b) replace the product with one of
the same or similar design; or (c) refund the purchase price. All replaced parts and
products, and products on which a refund is made, become the property of Radio
Shack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the re-
mainder of the original warranty period. You will be charged for repair or replacement
of the product made after the expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of
God, abuse, accident, misuse, improper or abnormal usage, failure to follow instruc-
tions, improper installation or maintenance, alteration, lightning or other incidence of
excess voltage or current; (b) any repairs other than those provided by a Radio Shack
Authorized Service Facility; (c) consumables such as fuses or batteries; (d) cosmetic
damage; (e) transportation, shipping or insurance costs; or (f) costs of product re-
moval, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which
vary from state to state.
Radio Shack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600,
Fort Worth, TX 76102
We Service What We Sell3/97
20-508.fm  Page 40  Wednesday, August 4, 1999  1:50 PM