RadioShack Pro 2051 Trunk Track Scanner Owners Manual

							Note: The smallest channel appe ars on the display when you store same frequency 
in two 
or more channels. 
Memory Lock 
To avoid the accidental programming frequen cies and talk group IDs, you can lock 
the 
memory with Memory Lock. 
Press and hold  M-LOCK for 2 seconds to activate this feature ,and “ M-LOCK” 
appears on 
the display. If you press  E to program memory, you will hear two beeps. To 
deactivate 
Memory Lock, press and hold  M-LOCK for 2 seconds again. 
Scanning Private Bank 
1. After programming frequencies, simply press  HOLD/RESUME 
to begin scanning. Or pressing PVT repeatedly until “ PVT” 
appears on the display, you can start Private Bank Scanning. 
The scanner scans only upw ard all the channels. 
2. The bank indicators selected for scanning appear on the display, and \
the bank 
being 
currently monitored flashes. You can deselect banks from active scanning\
 by 
entering 
their numbers on your keypad. The indicator for each deselected bank disappears, 
and 
the bank’s channels are not scanned. 
Note: One bank must always be active. You cannot  deactivate all five banks at the 
same 
time. If you try to deselect all the banks,  the first bank is automatically selected. 
To restore a bank to active scanning, ent er the bank’s number on your keypad. 
The bank’s indicator will display again. 
3. During normal scanning the scanner skips unprogrammed or 
locked out channels. 
4. When a transmission is received, the scanner stops on that 
channel. When the transmission ends, scanning resumes 
automatically. 
Note: You can set the scanner to hold for two seconds on the 
frequency for a response. For more information on Delay 
feature, please see page 28. 
. 
1 3 4 5 2  BANK 
Frequency not entered 
or Locked Out (L/O) 
SCAN 
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							Hold/Resume 
If you want to stop on a channel during scanning, press 
HOLD/RESUME. 
If you want to resume scanning, press  HOLD/RESUME. 
Direct channel access: 
There are several ways to access a specific channel quickly. 
1. Press HOLD/RESUME. 
2. Using the keypad, enter the channel number. 
3. Press HOLD/RESUME  again. 
Note: You can also use the  PVT,   or   key instead of 
pressing  HOLD/RESUME . 
Channel Lockout 
You can lockout any channel so it is not  checked during normal scanning. You can 
also 
restore the channel to scanning when you wish. 
Lockout in Hold Mode 
‚P. Press  HOLD/RESUME  and enter the channel number by using the keypad, then 
press 
HOLD/RESUME . 
––– OR ––– 
1. Press HOLD/RESUME  and enter the channel by using the   
or   key. 
2. Press  L/O to lockout the channel. 
“L/O ” appears on the display. 
Lockout in Scanning Mode 
If the scanner keeps stopping on a particu lar channel due to noise or frequent 
transmissions, 
you may want to keep that channel from scanning. 
1. Wait until the scanner stops on the channel. 
2. Then press  L/O. 
3. The scanner immediately resumes sc anning because the locked out channel is 
no longer 
in the scanning sequence. 
Lockout Tips  Write down your locked-out channel s and put in a convenient place 
in 
case you need to restore them. 
Restoring a Locked-out Channel in Hold Mode 
1. Press  HOLD/RESUME  and select the channel number you want to restore by 
using the 
keypad, the   or   key, then press  HOLD/RESUME. 
2. Press L/O to unlock the channel. The “ L/O” disappears. 
Page 23 
Restoring All Locked-out Channels  
						

							You can restore all locked-out channels in a bank only when a bank is selected for 
scan. If 
you have deselected a bank and you want to  restore all of its locked-out channels 
using the 
steps below, you must press  PVT until “ PVT” appears and then enter  the number of 
the 
bank on your keypad. 
1. Press  HOLD/RESUME. 
Note: You must be in Hold mode before  restoring all locked-out channels. 
2. Press and hold L/O for about 2 seconds. You will  hear two beeps when all the 
channels 
have been restored. 
Priority Scan 
When Priority Scan is turned ON, your sc anner checks the priority channel in the 
banks you 
selected every two seconds for activity. If  a signal is present on the priority channel, 
your 
scanner monitors the channel  until the transmission ends, then resumes normal 
scanning. 
You can designate one channel in each bank  as a Priority Channel. By default, the 
first 
channel in each bank is the Priority Channel, but you can change this. 
To activate Priority Scan (in either the Hold or Scan mode): 
1. Press  PRI. “PRI ” appears. 
Note : If you have locked out the priority channel, error message 
appears when you select Priority mode. 
2. Press  PRI again to deactivate Priority Scan. “ PRI” disappears. 
Changing the Priority Channel 
You cannot eliminate the Priority Channel, but you can change it to any one of the 
50 
available channels in each bank. 
1. Press  HOLD/RESUME. 
2. Select a new Priority Channel: 
a. Enter the channel number using the keypad. 
b. Then press  HOLD/RESUME . 
3. Press and hold  PRI for 2 seconds to designate this channel 
as your new Priority Channel. 
When you hear two beeps, the Priority Channel has been 
changed. “P” appears on the display. 
Note : Priority in Trunking mode works just  the same, except you set them for 
talkgroup IDs 
instead of setting priorities for channels.  The scanner only checks priority talkgroups 
between transmission. 
24  
						

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25 
Service Scanning 
The service scan feature allows you to rotate through the following nine\
 service 
banks. 
q Local Police and County Sheriffs *1 
w  Fire and Emergency Medical Service 
e News Media 
r Weather (NOAA, weat her and Canadian Coast Guard broadcasts) 
t CB Band 
y  Aircraft *2 
u  Railroads 
i Marine Band 
o  Department of Transportation *1 
*1) Frequencies are pre-programmed on every U.S. state. 
*2) Except Aeronautic Radio  Navigation (108-117.9875 MHz) 
1. Press SVC to select a Service. 
The current service bank icon appears on the display. 
2. Continue pressing  SVC until your desired Service is 
displayed. 
3. After a three second delay scanning begins. If you want to 
start scanning immediately, press  HOLD/RESUME. 
Notes:• Press HOLD/RESUME  at any time to hold  the frequency. Press the   or 
  key to 
move up or down the frequency. If you find  the frequency you want to store, while 
in Hold mode you can store the frequency (see page 21). 
• If you want to remain on a frequency  until a responding transmission is received, 
press DELAY  to activate the delay feature (See page 28). 
• To skip a frequency, press  L/O. You can program up to 100 skip frequencies for 
Local Police, County Sheriffs and Depar tment of transportation. And you can 
program up to 50 skip frequencies for other services (See page 27). 
• If you select POLICE or DOT, press STATE to select the desired state. 
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Band Search 
Setting a Search Band 
The 20-426 can search up to 13 separat e frequency ranges to help you discover 
new stations 
in your area.  
						

							To set a Search Bands, enter into the Band Search mode. 
1. Press SRCH. The upper and lower limits of the Bands 
currently selected are on the display. 
2. Use the   or   key to select the band you want to search. 
Wait for about two seconds and the scanner will begin 
searching that band. Or press  HOLD/RESUME to begin 
immediately. 
Notes:• You must set the Search Bands prior to any searching. 
• The scanner automatically increases it s search speed up to 300 steps per second 
for bands having 5 kHz steps. (Turbo Search) 
• While searching, you can change the search direction by using the   or 
  key. 
Make sure which of icon, “SRCH ” or “SRCH ” appears on the display. 
Band 
 
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• While Private Scanning in  the trunking banks, press SRCH, then it will move to ID 
Search mode. 
Search Hold Feature 
1. Press  HOLD/RESUME  at anytime to stop the search. To move up or down 1 
frequency 
step, use the   or   key. 
2. Press  HOLD/RESUME  to resume searching. 
Data Skip 
A scanner will normally stop on any transmission it receives. This 
means the 20-426 will occasiona lly stop on data signals and 
unmodulated transmissions. You can  automatically skip many of 
these types of transmissions during search. 
1. To activate the Data Skip feature, press  DATA in Scan or Search mode. “ ” 
appears on the display. 
2. To deactivate the Data Skip feature, press  DATA again. “ ” disappears. 
When Data Skip is active, your sc anner may pause momentarily on an unwanted 
signal 
but will resume searching in two or three se conds. The Data Skip feature is active 
as 
well as Scan mode and Service Search mode. Data Skip does not function during 
Service Scanning band (for AI R, CB, or Weather band), Priority Scan, and Trunking 
mode. 
Frequency Skip 
If a particular frequency continues to interrupt  search scanning, it is possible to set 
the 
scanner to skip the frequency.  
						

							To skip over a frequency, press L/O when stopping on the frequency you want to 
skip or 
when in Search Hold mode. 
Note : You can program up to 100 skip frequencies. 
The 101st skip frequency entered causes the first skipped frequency to u\
nlock. 
To restore a Locked out/Skipped channel. 
1. Select the desired frequency by using the   or   key in Search Hold mode. 
2. Press  L/O, and then press  HOLD/RESUME. 
To restore all skipped fr equencies, press and hold  L/O for 2 seconds in Search Hold 
mode. 
27 
Storing Search Frequencies 
You can quickly store any frequency you find during Search. 
1. During Search, press  HOLD/RESUME. If you want to change 
the frequency, use the   or   key to move up or down 1 
frequency step. Then press  E. Or when the scanner stops on 
the frequency you want to store, press  E. 
2. Select a bank you want to  store by using the keypad. The 
smallest empty channel number  and the frequency alternately 
appear on the display. If necessary, you can also change the 
channel by using the keypad, the   or   key. 
3. Press  E. 
Note : • If the frequency you want to store ex ists already in a bank, you will hear an 
error 
tone and other channel appears on the displa y. (See “Duplicate Frequency Alert” 
on page 22.) 
• After storing the frequency, it moves to the Search Hold mode. 
• If there is no free channel, the frequency  you want to store will automatically be 
stored in the first channel in the selected bank. 
4. Press SRCH to resume searching. 
Delay 
To help prevent missing a reply on a specific channel or frequency, you \
can 
program a two second 
delay into any channel, frequency, service band or band search. When scan or 
search stops on a channel or frequency,  there is a two-second pause before the 
scanning 
cycle resumes. 
To activate the Delay feature (in  either Scan mode or Search mode): 
1. For Highway Scan mode or Private Scan  mode, when in Hold mode, select the 
desired 
frequency or channel and then press DELAY . Or when the scanner stops on an 
active 
frequency or channel, quickly press  DELAY before it continues scanning again.  
						

							––– OR ––– 
1. For Search mode, while searching press DELAY. 
2. “DLY ” will appear on the display. 
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20-426  8/22/03  1:40  PM  Page  28 
29 
Trunk Tracking 
Your 20-426 is tracks three major types  of trunked radio systems. These systems 
are 
described here. 
✎ MOTOROLA - Including Type I, Type II, Hybrid, SMARTNET, and Privacy Plus. 
Motorola systems are widely used by public  safety and business users. Most are on 
the 800 MHz band, and recent systems are appearing on other bands. (see page 
43). 
✎ EDACS - Including Wideband 9600 baud  and SCAT. Wideband systems are 
mostly on 
the 800 MHz band, and are used by public sa fety, utilities, and business users. 
Some 
systems are used on the VHF and UHF ban ds. (see page 39). SCAT systems are 
single-channel EDACS systems, and are ma inly used in the Midwestern United 
States. 
✎LTR - These systems are mostly for bus iness users, and found on the UHF, 800 
and 900 
MHz bands. (See page 42). 
For details on the operation and programming  for all of these systems, see pages 
29-47. 
When tracking these types of systems,  remember these important points: 
• Your scanner defaults to monitor Moto rola Type II 800; however, you can change 
this if 
the system in your area is different. (T he types of systems are discussed below.) 
• The frequencies for many of the trunked public safety systems are listed in the 
TrunkTracker 
Frequency Guide included with your 20-426 scanner. Frequencies sometimes 
change, check 
with  www.trunktracker.com. 
• If you have internet access, you can visit  scanner.Radio Shack.com or 
www.trunktracker.com 
for additional information, for current news and frequency information, about Trunk 
Tracking Scanning. 
* Motorola, SMARTNET, and PRIVACY PLUS  are trademarks of Motorola Inc. 
EDACS is a 
registered trademark of the M/A - COM Inc. LTR is a  registered trademark of E.F. 
Johnson 
Company.  
						

							Setting the Squelch 
For trunked reception, a good setting for the SQL control is in the 
center of the range wit h the color marker pointing up. See the 
illustration. 
If it is set too high, it could prev ent your scanner from locking to the 
Control Channel reliably. If it is set too low, it will slightly delay finding 
the Control Channel. The best setting is the same as for conventional 
reception, and is critical for monitoring trunked systems. 
SQL push 
FLASH 
MUTE ALERT 
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Programming Trunking Frequencies 
There are three steps for programming a trunked system: 
1. Program the Trunk Type – What type of system will the scanner be tracking, 
Motorola 
Type II, Type I, EDACS, LTR, etc. 
2. Program the Trunked Frequencies – Wi thin a trunked system, the frequencies 
are 
shared among all the users, called “Talk Groups”. 
3. Program the Talk Groups – With in the trunked system, each agency or 
department is 
assigned a Talk Group ID. This ID must  be programmed into the scanner in order 
for it to 
monitor that specific agency or department. 
Before you start programming your scanner  to track a trunked system, consider the 
following: 
• You can only program one trunking system in each bank of your scanner. 
• Trunked frequencies must be entered wh ile in the Trunk Programming mode. 
• If you’re in the Trunk Programming mode, you cannot select channels in other 
banks. 
For example, if you are programming Bank  4, you can only select channels 151-200 
with 
the    or   key. 
• IMPORTANT : If you are programming an EDACS ® trunked system, you must 
enter the 
frequencies in a specific order. Check t he frequency guide included with the radio 
and the 
listed web sites for details. 
STEP 1: Selecting Trunking System Type 
The first step in a Trunk Tracking system is  storing the frequencies in one of the five 
available banks in your scanner. 
1. Press TRUNK for 1.5 seconds.  
						

							You will hear two beeps, and “BANK” and “ TRUNK ” will begin to flash on the 
display. 
2. Select the bank you want to  store the frequency by using the 
keypad. 
3. Select the system you want to track by using the  or   key, 
then press  E. 
List of trunking systems as follows: 
E2-800 (Motorola Type II 800 MHz) 
E2-Hi (Motorola Type II VHF 136-174 MHz) * 
E2-UHF (Motorola Type II UHF 406-512 MHz) * 
E1 (Motorola Type I and Hybrid) ** 
Ed (EDACS® Wide Band: 9600 band)*** 
Ed SCt (EDACS Scat) 
Lt (LTR) 
* Requires programming of a Base and  Spacing frequency Offset channel (See 
page 45). 
** Requires programming of a Fleet map (See page 44). 
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*** Requires programming of frequencie s in exact order and location. 
STEP 2: Programming Trunking Frequencies 
1. Select and press E. Use the keypad and (decimal key) to enter a frequency 
for the trunked system. 
For example, enter . 
Note : To clear a mistake while entering a frequency, press 
(decimal key) twice, and start over. 
2. Then press  E. 
The “ E” (EDACS), “ M” (Motorola) or “ L” (LTR) appears depending on the trunked 
system selected. 
If the frequency is out of the range of t he system chosen in this step, you will hear 
an 
error tone, the channel  number flashes and an error message appears on the 
display. 
3. Use the   or   key to select the next channel in the bank and press  E. 
4. Repeat steps 2 and 3 until  all frequencies have been entered. 
5. Press SRCH to begin searching the bank you‘ve 
programmed. 
Then select the programmed bank by using the keypad. 
✎ Remember!  To lockout the keypad to prevent  re-programming of talkgroups, 
you can 
use Memory Lock (Refer to “Memory Lock” on page 22). 
Hint : If you want to return to  the previous menu screen, press  HOLD/RESUME in 
the  
						

							Trunk Programming mode. 
Programming Talk Group ID/Scan Lists 
Scan Lists 
Each bank of your 20-426 can be a trunk tracking bank and it can be a conventional 
scanning 
bank. When you designate a bank as a trunking bank, your scanner sets up 5 Scan 
Lists, 
which are simply lists used to store your favorite Talk Group IDs. Each list can 
contain up to 
10 IDs, so you can store a total of 50 IDs for each trunk tracking bank. (250 IDs if 
you use 
all the banks as trunking banks!) 
Scan Lists help you organize the trunki ng system users into categories. For 
example, you 
might use List#1 for police IDs, List#2 fo r fire department IDs, List#3 for emergency 
medical 
service IDs, etc. Once IDs are stored  in lists, you can scan them as you scan 
conventional 
frequencies and you can lockout any one (up to  4) of the 5 Scan Lists by pressing 
the 
corresponding numeric key. When an ID is active, the Scan List number will appear 
on the 
display. You can program your Scan Li sts either manually or during Trunking 
Search mode. 
Check the web site  www.trunktracker.com  for a complete list of talkgroups for 
your area 
that you can program into your Scan Lists. 
. 
. 
Page 31 
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In order to program Talk  Group ID’s, you must first complete Step1–“Selecting 
Trunking 
System Type”, page 30 and Step 2 – “Pr ogramming Trunking Frequencies”, page 
31. 
1. After programming a frequency, press  HOLD/RESUME to return to the main 
screen of 
system type selected and select . Then press  E. 
2. Select the Scan List location by using the   or   key. 
3. Enter the Talk Group IDs fo r each trunk system as follows. 
To enter a Type 2 Talk Group ID: 
1. Enter the ID you want to store by using the keypad. 
2. Press E. 
To enter a Type 1 ID: