RadioShack Pro 2051 Trunk Track Scanner Owners Manual

mA. 
You must use a power source that supplies 12V DC and delivers at least 
500 mA. Your standard 12V car battery should be sufficient. The cord connector’s 
center tip must be set to positive and its plug must fit the scanner’s  DC 12V jack. 
The supplied DC power cord meets these s pecifications. Using a power cord that 
does not meet these specifications could damage the scanner or the adapter. 
• Always connect the adapter or DC power co rd to the scanner before you connect it 
to the 
power source....

When 
you finish, disconnect the adapter from the AC power before you disconnect it from 
the scanner. 
1. Insert the adapter’s barrel plug into the DC 
12V jack on the rear of the scanner. 
2. Plug the adapter into a standard AC outlet. 
Note : Use only the AC adapter supplied with 
your scanner. 
Connecting an External Speaker 
In a noisy area, an external speaker (a vailable at a local electronics store) 
positioned in the 
right place might provide mo re comfortable listening. 
Plug the speaker...

1. Highway Patrol Scanning  When you select a state you want to scan in Highway 
Patrol 
mode, you can scan pre-programm ed Highway Patrol frequencies. 
2. Service Scanning  Press SVC to select one of the nine  services to find an active 
frequency. 
3. Band Search Select a frequency band to search. The Search function is different 
from 
scanning. It searches for any active fr equency step by step within the lower and 
upper 
limits of the band. When an active frequency is found, the scanner will stop...

MUTE ALERT 
Turn 
SQL 
VOL 
push 
ALERT 
FLASH 
MUTE ALERT 
Alert 
Light 
Page 14 
15 
How Squelch Works 
Think of “SQUELCH” as a gate.  If the gate is too low (squelch 
too low), everything (all noise as well as signals) gets through. 
If the gate is set too high (squelch too high), nothing gets 
through. 
If the gate is set just right (squel ch set properly), just the desired 
signals get through. 
Setting the Squelch 
1. To set the squelch, press HOLD/RESUME to stop scanning. 
If needed, adjust  VOL...

Weak Signals 
Noise 
SQL push 
FLASH 
MUTE ALERT 
Turn 
SQL push 
FLASH 
MUTE ALERT 
Turn 
Page 15 
Highway Patrol Scanning 
Highway Patrol frequencies are pre-programmed on a state-by-state basis. When 
Highway 
Patrol scanning, the Highway Warning Alert is activated. 
Selecting the State 
1. Press  STATE to select the state you are operating in. 
Press and hold  STATE to scroll rapidly. 
Hint: For the State Code Or der, please see page 56. 
2. To step forward through the states (A - W), press  STATE...

Page 16 
17 
Highway Patrol Scan Hold 
1. When scanning stops on a desired frequency, press 
HOLD/RESUME to hold on that frequency as long as you 
like. When in the HOLD mode, press the   or   key to step 
up or down the frequency. To step  up or down rapidly, press 
and hold the  or   key. 
If you change into a frequency which is a control channel, the 
scanner may display the Active ID (When TRUNK mode is 
active). 
2. To resume scanning, press  HOLD/RESUME. 
Note: Highway Warning Alert does not work...

ALERT 
FLASH 
MUTE ALERT 
Alert 
Light 
Flashes 
VOL 
push 
ALERT 
MUTE ALERT 
Push In 
VOL 
push 
ALERT 
FLASH 
MUTE ALERT 
MUTE LED 
Flashes 
Page 17 
• Press MUTE to cancel One Moment Mute. 
• Press and hold MUTE  for two seconds to cancel  Continuous Mute. You hear two 
beeps 
and the MUTE LED goes out. 
• Change states. The MUTE LED goes out after scanning starts. 
• Turn the scanner off and on. 
Note : If MUTE  is pressed for less than 2 seconds during the Continuous Mute 
mode, 
nothing will be...

the frequency is skipped of both states. If you change the state code, skipped 
frequencies 
are cancelled as soon as scanning starts. 
Priority Channels 
Each state preprogrammed in the  scanner contains a number of Priority channels. 
The 
scanner  automatically checks a state’s Prio rity channels every two seconds for 
activity. If 
there is activity on one of the Priority  channels, the ALERT Light will flash and the 
alarm 
tone will beep (see “Highway  Warning Alert,” page 17). 
18 
SQL push 
FLASH...

mode is especially recommended for the following states: 
(Arizona) (Michigan) 
(Delaware) (Oklahoma) 
(Florida) (Wisconsin) 
“PRI ” flashes when you select Priority Only Mode. 
• Priority off mode 
The scanner does not check  the Priority frequency. “PRI” will not displayed. 
20-426  8/22/03  1:40  PM  Page  19 
Trunked Highway Frequency 
Trunked Highway frequencies ar e pre-programmed for each 
state. When the scanner finds the control channel data, the 
scanner begins to find any active IDs. If the...

Before the scanner begins Private Bank scanning, you must program a frequency 
into at 
least one channel. Program frequencies you  purchased from your dealer, from 
various free 
and FCC-based sources on the internet, or  from the Frequency guide included in 
20-426 
package. You will need to progr am each frequency into the 
scanner’s channels in order to hear these frequencies. 
1. While Private Bank scanning is activated, press 
HOLD/RESUME and enter the channel  number where you 
want to store a...