RadioShack Pro 91 Handheld Trunking Scanner Owners Manual

							61
152.0075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  MED
152.030–152.240  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TELB
152.270–152.480  . . . . . . . . . . . . . . . . . . . . .  IND, TAXI, 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 Cleanup
154.600–154.625  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  BUS
154.655–156.240  . . . . . . . . . . . . . . .MED, ROAD, POL, PUB
156.255–157.425  . . . . . . . . . . . . . . . . . . . . . . . . . . OIL, 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
161.580–162.000  . . . . . . . . . . . . . . . . . . . . .  OIL, 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
169.445–169.505  . . . . . . . . . . . . . . . . Wireless Mikes, GOVT
169.55–169.9875  . . . . . . . . . . . . . . . . . . .  GOVT, MIL, USXX
170.000–170.150  . . . . . . . . . . . . . . . BIFC, 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
173.225–173.5375  . . . . . . . . . . . . . . MOV, NEWS, UTIL, MIL
173.5625–173.5875  . . . . . . . . . . . .MIL Medical/Crash Crews
173.60–173.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT
ULTRA HIGH FREQUENCY (UHF)
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
453.0125–454.000  . . . . . . . . . . . . . . . . . . . . . . . . . .PUB, 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
462.550–462.925  . . . . . . . . . . . . . . . . . . . . . . . . .  GMR, BUS 
						

							62
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.
Conventional Systems Band – Locally Assigned
851.0125–855.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CSB
Conventional/Trunked Systems Band – Locally Assigned
856.0125–860.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . CTSB
Trunked Systems Band – Locally Assigned
861.0125–865.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TSB
Public Safety Band – Locally Assigned
866.0125–868.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PSB
33-Centimeter Amateur Band (902–928 MHz)
902.0000–928.0000  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  HAM
Private Trunked
935.0125–939.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PTR
General Trunked
940.0125–940.9875  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GTR
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 the number of mega-
hertz by 1,000:
9.62 (MHz) x 1000  = 9620 kHz
To convert from kHz to MHz, divide the number of kilo-
hertz 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 
						

							63
TROUBLESHOOTING
If you have problems, here are some suggestions that
might help. If they do not, take your scanner to your
loca l  RadioShack store for assistance.
PROBLEMPOSSIBLE 
CAUSEREMEDY
Scanner is on but 
will not scan.
SQUELCH is not 
adjusted cor-
rectly.Turn SQUELCHclockwise.
Only one channel 
or no channels 
are stored.Store frequencies 
into more than 
one channel.
Scanner is totally 
inoperative.No power. Check the batter-
ies or make sure 
the AC adapter or 
DC adapter is 
connected prop-
erly.
Recharge the 
rechargeable bat-
teries or replace 
the non-recharge-
able batteries.
The AC adapter 
or DC adapter is 
not connected.Be sure the 
adapter’s barrel 
plug is fully 
plugged into the 
POWER jack.
The scanner’s 
display dims or 
the scanner 
sounds a tone 
every 15
–30 sec-
onds.Batteries are not 
correctly 
installed.Make sure the 
batteries are 
installed properly.
The batteries are 
weak.Recharge the 
rechargeable bat-
teries or replace 
the non-recharge-
able batteries.
Keypad does not 
work.The keylock func-
tion is activated.To turn off the 
keylock, press 
KEYLOCK until K/L disappears.
BATT. Loflashes.The batteries are 
weak.Recharge the 
rechargeable bat-
teries or replace 
the non-recharge-
able batteries. 
						

							64
PROBLEMPOSSIBLE 
CAUSEREMEDY
An antenna is not 
connected or 
connected incor-
rectly.Make sure an 
antenna is con-
nected to the 
scanner.
Errorappears.Programming 
error.Re-enter the fre-
quency correctly, 
including the deci-
mal point.
The scanner 
locks on frequen-
cies that have an 
unclear transmis-
sion.Stored frequen-
cies are the same 
as “birdie” fre-
quencies.Avoid storing fre-
quencies listed 
under “Birdie Fre-
quencies” on 
Page 57 or only 
listen to them 
manually. 
Scanner will not 
track a trunked 
system.The transmis-
sion might not 
use a system that 
can be tracked by 
your scanner.Scan another 
transmission.
The data fre-
quency is miss-
ing.Find the data fre-
quency (see 
“Storing Trunked 
Frequencies” on 
Page 41). 
The system you 
are trying to track 
is a Type I sys-
tem, and the 
scanner is set to 
scan Type II sys-
tems.Set the scanner to 
receive Type I 
trunked frequen-
cies. See “Scan-
ning Type I and 
Hybrid Trunked 
Systems” on 
Page 50. 
Scanner is set to 
receive Type I 
trunked frequen-
cies, but does 
not scan them.The fleet map 
you have select-
ed or entered 
might be incor-
rect.Check the fleet 
map and correct it 
if necessary (see 
“Scanning Type I 
and Hybrid 
Trun ked  Sys-
tems” on Page 50 
and “Program-
ming a Fleet Map” 
on Page 51). PROBLEMPOSSIBLE 
CAUSEREMEDY 
						

							65
Scanner will not 
stop while scan-
ning a scan list.No IDs have 
been stored.Store one or more 
IDs (see “Scan 
Lists” on Page 48.
The IDs you have 
stored are not 
active.Scan another 
transmission.
Scanner will not 
acquire a data 
channel.
SQUELCH is not 
correctly adjusted 
for trunk tracking.Adjust squelch for 
trunk tracking. 
See “Setting 
Squelch for the 
Trunk Tracking 
Mode” on 
Page 41. 
The frequency 
used for the data 
channel is miss-
ing.Press 
SRC to 
search for the 
data channel (see 
“Storing Trunked 
Frequencies” on 
Page 41).
Missing replies to 
conversations.The system you 
are trying to track 
is a Type I sys-
tem, and the 
scanner is set to 
scan Type II sys-
tems.Set the scanner to 
receive Type I 
trunked frequen-
cies. See “Scan-
ning Type I and 
Hybrid Trunked 
Systems” on 
Page 50.
The selected 
fleet map is incor-
rect.Try another preset 
fleet map or pro-
gram your own 
fleet map (see 
“Scanning Type I 
and Hybrid 
Trunked Sys-
tems” on 
Page 50).
Missing replies to 
conversations 
(continued)Not all of the 
trunk’s frequen-
cies have been 
entered.Enter all of the 
trunk’s frequen-
cies (see “Storing 
Trunked Frequen-
cies” on Page 41). PROBLEMPOSSIBLE 
CAUSEREMEDY 
						

							66
RESETTING THE SCANNER
If the scanner’s display locks up or does not work prop-
erly, you might need to reset the scanner. 
Caution:
 This procedure clears all the information you
have stored into the scanner. Before you reset the
scanner, try turning it off and on to see if it begins work-
ing properly. Reset the scanner only when you are sure
it is not working properly.
1. Turn off the scanner.
2. While you hold down the 
2 and 9 keys, turn on the
scanner. 
CLEAR flashes for about 8 seconds as
the scanner clears its memory. 
Note:
 Do not turn off the scanner until 
CLEAR stops
flashing. Otherwise, the scanner might not clear its
memory properly.
Channel activity 
bars are flashing 
but no sound is 
heard.The transmis-
sion might be a 
private or tele-
phone intercon-
nect call. The 
scanner does not 
scan these types 
of transmissions.Scan for another 
transmission.
The ID shown is 
not active.Wait for the ID to 
become active, or 
scan another 
transmission. PROBLEMPOSSIBLE 
CAUSEREMEDY 
						

							67
CARE AND MAINTENANCE
Your RadioShack PRO-91 150-Channel Handheld
Trunking Scanner is an example 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 can contain
minerals that can corrode the electronic
circuits.
Use only batteries of the recommended
size and type. Always remove old and
weak batteries. They can leak chemicals
that destroy electronic circuits.
Handle the scanner gently and carefully.
Dropping it can damage circuit boards
and cases and can cause the scanner to
work improperly.
Use and store the scanner only in normal
temperature environments. Temperature
extremes can shorten the life of electron-
ic devices, damage batteries, and distort
or melt plastic parts.
Keep the scanner away from dust and
dirt, which can cause premature wear of
parts.
Wipe the scanner with a damp cloth oc-
casionally to keep it looking new. Do not
use harsh chemicals, cleaning solvents,
or strong detergents to clean the scan-
ner.
Modifying or tampering with the scanner’s internal com-
ponents can cause a malfunction, invalidate your scan-
ner’s warranty and void your FCC authorization to
operate it. If your scanner is not operating as it should,
take it to your local RadioShack store for assistance. 
						

							68
SPECIFICATIONS
Frequency Coverage:  .....  29–54 MHz (in 5 kHz steps)
108–136.975 MHz (in 12.5 kHz steps)
137–174 MHz (in 5 kHz steps)
406–512 MHz (in 12.5 kHz steps)
806.0000–823.9375 MHz (in 12.5 kHz steps)
851.0000–868.9875 MHz (in 12.5 kHz steps)
896.1125–956.0000 MHz (in 12.5 kHz steps)
Monitor Channels  5
Number of Banks  5
Sensitivity (AM/FM):
NFM: 20 dB S/N at 3 kHz deviation):
29–54 MHz  0.5 µV
137–174 MHz  0.4 µV
406–512 MHz  0.4 µV
806–956 MHz  0.6 µV
AM: 20 dB S/N at 60% modulation):
108–136.9875 MHz  1.5 µV
Spurious Rejection (at 40.84 MHz)  50 dB
Selectivity:
10 kHz  –6 dB
15 kHz  –50 dB
IF Rejection (at 162.4 MHz)  80 dB
Channels ...............................................................  150
Operating Temperature  .... –4 to 140
° F (–20 to 60° C)
Scan Speed  ...............................  50 Channels/Second
Search Speed:
Normal  .......................................  100 Steps/Second
Hypersearch  ..............................  300 Steps/Second
Service  ..............................  50 Frequencies/Second
Priority Sampling  ........................................  2 Seconds
Delay Time  .................................................  2 Seconds
IF Frequencies  380.7 MHz, 10.85 MHz, and 450 kHz
Antenna Impedance  50 Ohms
Audio Output  .................................  350 mW maximum
Built-in Speaker  ............... 1
7/16 Inches (36 mm) 8 Ohm,
 Dynamic Type
Maximum Current Drain  ..................................  180 mA 
						

							69Power Requirement:
  4 AA Alkaline Batteries (6.0 VDC),
          or 4 AA Rechargeable Ni-Cd Batteries (4.8 VDC),
                                 or AC Adapter (Cat. No. 273-1665),
                                  or DC Adapter (Cat. No. 270-1560)
Current Drain:
Squelched ..................................................  70 mA
Full Output  ...............................................  180 mA
Dimensions (HWD)  ...............  6
1/4× 21/2× 19/16 Inches
(158 × 63 × 40 mm)
Weight (without antenna, batteries, belt clip)  ..... 8.1 oz
(229 g)
Specifications are typical; individual units might vary.
Specifications are subject to change and improvement
without notice. 
						

							70
NOTES