RadioShack Pro 2041 Vhf Uhf Scanner Reciever Maintenance Manual

							PCH ALL-OFF - appears when you press PRIORITY and all of the scanners 
              priority channels are empty or locked out. 
 
PC - appears with PROGRAM when you set the scanner to the data transfer 
     mode. 
 
ConnECt - appears while you transfer frequencies from a personal computer 
          to the scanner. 
 
FiniSH - appears when all frequencies have been successfully transferred 
         from a personal computer to the scanner. 
 
1-Error - appears instead of ConnECt when a checksum error occurred 
          while transferring frequencies (data transfer stops). 
 
2-Error - appears instead of FiniSH when out-of-range data on either a 
          channel or a frequency was encountered while transferring 
          frequencies. 
 
3-Error - appears instead of ConnECt when a communications error occurred 
          while transferring frequencies (data transfer stops). 
 
 
UNDERSTANDING BANDS/BANKS/MEMORIES 
 
Search Bands 
 
Your scanner can tune over 32,000 different frequencies.  Many of these 
frequencies are grouped within permanent memory locations called 
search bands (1-17). 
 
Band             Search                    Description 
                 Range 
                 (MHz) 
 
01               29-30                     10-Meter Amateur Radio 
02               30-50                     VHF Lo 
03               50-54                     6-Meter Amateur Radio 
04              108-136                    Aircraft 
05              144-148                    2-Meter Amateur Radio 
06              148-174                    VHF Hi 
07              380-384                    Military Aircraft 
08              406-420                    Government 
09              420-450                    70-Centimeter Amateur Radio 
10              450-470                    UHF Lo 
11              851-856                    UHF Hi 
12              856-866                    UHF Hi 
13              866-869                    UHF Hi 
14              935-940                    UHF Hi 
15              940-941                    UHF Hi 
16              941-952                    UHF Hi 
17              952-960                    33-Centimeter Amateur Radio 
 
You can search these bands to quickly find active frequencies you 
might want to store into the scanners channels.  For example, if you  
wanted to search for transmissions between pilots and the control tower at  
an air show, you could search only the search bands where you are most  
likely to hear the transmissions (4 and 7). 
 
NOTES:  The scanner can search for transmissions on frequencies that are 
        not stored in any of the search bands.  
						

							 
        The actual search range of Band 04 is 108-136.975 MHz. 
 
        The frequencies in the scanners search bands are preset.  You 
        cannot change them. 
 
        General Guide to Scanning, Faxback Doc. # 38900 lists other  
        frequency ranges and the broadcasts you are likely to hear on those 
        frequencies. 
 
 
Channel-Storage Banks 
 
To make it easier to identify and select the channels you want to listen 
to, channels are divided into 10 channel-storage banks (1-10) of 40 
channels each.  You can use each channel-storage bank to group 
frequencies, such as those used by the police department, fire department, 
ambulance services, and aircraft. 
 
For example, there might be three or four police departments in your 
area, using several different frequencies.  Additionally, there might 
be other law enforcement agencies such as state police, county sheriffs, 
or SWAT teams that use their own frequencies.  You could program all 
law enforcement frequencies starting with Channel  1 (the first channel 
in Bank 1), then program the fire department, paramedic, and other public 
safety frequencies starting with Channel 41 (the first channel in Bank 2). 
 
 
Monitor Memories 
 
The scanner also has 40 monitor memories that you can use to temporarily 
store frequencies while you decide whether to save them into channels. 
This is handy for quickly storing an active frequency when you are 
searching through an entire band. 
 
You can only store a frequency into a monitor memory during a band, limit, 
or direct search.  See Operation, Faxback Doc. # 38898. 
 
You can select monitor memories manually, but you cannot scan them.  
						

							PRO-2041 Scanner 
(200-0463)                 Special Features           Faxback Doc. # 38899 
 
 
USING THE DELAY FEATURE 
 
Many agencies use a two-way radio system that might have a pause of 
several seconds between a query and a reply.  To avoid missing a reply, 
you can program a 2-second delay into any of your scanners channels or 
frequencies.  Then, when the scanner stops on the channel or frequency, 
DELAY appears and the scanner continues to monitor the channel/frequency 
for 2 seconds after the transmission stops before it resumes scanning or 
searching. 
 
You can program a 2-second delay in any of these ways: 
 
  If the scanner is scanning and stops on an active channel, quickly press 
  DELAY before it starts to scan again. 
 
  If the desired channel is not selected, manually select the channel 
  then press DELAY. 
 
  If the scanner is searching, press DELAY during the search.  DELAY 
  appears and the scanner automatically adds a 2-second delay to every 
  transmission it stops on. 
 
To turn off delay, press DELAY when DELAY is displayed. 
 
 
ATTENUATING RECEPTION 
 
To reduce interference or noise caused by signals from a strong local 
broadcaster, you can reduce the scanners sensitivity to signals by 
setting the ATT (attenuate) switch on the back of the scanner.  Switch 
ATT to 10 dB to reduce the scanners sensitivity, or to 0 dB to receive 
the signal without attenuation. 
 
If you switch ATT to 10 dB, your scanner might not receive weak signals. 
 
 
LOCKING OUT CHANNELS AND FREQUENCIES 
 
You can scan existing channels or search frequencies faster by locking 
out channels or frequencies that have a continuous transmission, such as 
a weather channel.  You can lock out as many as 400 channels and 200 
frequencies during a search. 
 
To lock out a channel while scanning, press L/OUT when the scanner stops 
on the channel.  To lock out a channel manually, select the channel then 
press L/OUT until L/OUT appears. 
 
NOTES:  You can delete all the frequencies stored in locked-out channels 
        within a bank. 
 
        You can still manually select locked-out channels. 
 
To remove the lockout from a channel, manually select the channel and 
press L/OUT until L/OUT disappears. 
 
To lock out a frequency during a band, limit, or direct search, press 
L/OUT when the scanner stops on the frequency.  The scanner locks out  
						

							the frequency, then continues searching. 
 
NOTES:  The scanner does not store locked-out frequencies during a search. 
 
        If you try to lock out more than 200 frequencies, L-FULL appears. 
 
Follow these steps to remove the lock-out from a frequency. 
 
1.  Press BAND or LIMIT or DIRECT/.to start a search. 
 
2.  Press L/OUT REVIEW.  L-r appears. 
 
3.  Repeatedly press UP ARROW or DOWN ARROW until the frequency you want 
    to remove the lockout from appears. 
 
4.  Press L/OUT.  The frequency you want to remove the lockout from 
    disappears. 
 
    If there is another locked-out frequency, it appears.  If there are 
    no more locked-out frequencies, the scanner continues searching. 
 
 
Reviewing Locked-Out Channels/Frequencies 
 
To review the channels you locked out, press MANUAL, then repeatedly 
press L/OUT REVIEW.  As you press L/OUT REVIEW, the scanner displays 
all locked-out channels. 
 
To review the frequencies you locked out, press BAND, LIMIT, or DIRECT/. 
to start a search, then press L/OUT REVIEW.  L/OUT REVIEW L/r appears. 
As you press UP ARROW or DOWN ARROW, the scanner displays all locked-out 
frequencies. 
 
 
USING THE PRIORITY FEATURE 
 
The priority feature lets you scan channels and still not miss important 
or interesting calls on the priority channels.  You can program up to 10 
frequencies as the priority channels.  When you turn on the priority 
feature, as the scanner scans channels.  It checks one of the priority 
channels every 2 seconds for activity. 
 
NOTE:  You can lock out priority channels.  If you lock out all priority 
       channels, the scanner displays PCH ALL-OFF when you lock out the 
       last channel. 
 
Follow these steps to store frequencies in the priority channels. 
 
1.  Press PROGRAM. 
 
2.  Use the number keys to enter the priority channel number (1-10) 
    where you want to store the frequency, then press PRIORITY. 
 
3.  Use the number keys to enter the frequency you want to store into 
    that channel. 
 
4.  Press ENTER to store the frequency. 
 
    NOTES:  If you entered an invalid frequency in Step 3, the scanner 
            beeps and displays Error.  Simply repeat Steps 3 and 4. 
  
						

							            Your scanner automatically rounds the entered frequency down 
            to the closest valid frequency. 
 
            If you enter a frequency that is already stored in another 
            channel, the scanner beeps three times and displays the lowest 
            channel number where the frequency is already stored, and 
            -dUPL- briefly flashes.  Then P and the channel number 
            appear and the frequency flashes.  If you want to store the 
            frequency anyway, press ENTER again. 
 
5.  Repeat Steps 2-4 to store more frequencies into the priority channels 
    (up to 10 channels). 
 
To turn on the priority feature, press PRIORITY when the scanner is in 
the scan or manual mode.  Pri -On- appears.  The scanner checks a 
priority channel every 2 seconds.  It stays on a priority channel if there 
is activity, and P and the priority channel number appear along with the 
priority frequency. 
 
To turn off the priority feature, press PRIORITY . P, the priority channel 
number, and the frequency disappear. 
 
 
Locking Out Priority Channels 
 
1.  Press PROGRAM. 
 
2.  Repeatedly press PRIORITY to select the priority channel you want 
    to lock out. 
 
3.  Press L/OUT. 
 
    NOTE:  If you have programmed only one priority channel. PCH ALL-OFF 
           appears. 
 
 
CHANGING THE AM/FM RECEIVE MODE 
 
The scanner is preset to the most common AM or FM receive mode for each 
frequency range.  The preset modes are: 
 
Frequency Band                   Receive 
(MHz)                            Mode 
 
29.0000 - 54.0000                FM 
108.0000 - 136.9750              AM 
137.0000 - 174.0000              FM 
380.0000 - 512.0000              FM 
806.0000 - 960.0000              FM 
 
The preset mode is correct in most cases.  However, some amateur radio 
broadcasts do not operate in the preset mode.  If you try to listen to a 
broadcast when the scanner is not set to the correct receive mode, the 
broadcast might sound weak or distorted. 
 
To change the mode, press AM/FM.  AM or FM blinks to indicate that 
the displayed receive mode has been changed from the preset mode. 
 
NOTE:  If you change any frequency bands receive mode during a search, 
       the scanner no longer uses any of the preset modes.  Instead, the 
       scanner uses the selected mode to search for frequencies in all  
						

							       bands. 
 
       To return to the default settings, hold down CLEAR, then press 
       CLEAR, then press AM/FM. 
 
 
TURNING THE KEY TONE OFF AND ON 
 
Each time you press any of the scanners keys, the scanner sounds 
a tone. 
 
Follow these steps to turn the scanners key tone off or back on. 
 
1.  If the scanner is on, turn OFF/VOLUME counterclockwise until it clicks 
    to turn it off. 
 
2.  While you hold down 2 and ENTER, turn on the scanner. 
 
3.  After 1 second, release 2 and ENTER. 
 
 
CONNECTING A DATA LINK TO THE SCANNER 
 
A data interface kit (not supplied) lets you program the scanner with 
frequencies stored in a computer.  Contact your local Radio Shack 
store for more information.  
						

							PRO-2041 Scanner 
(200-0463)                 Specifications             Faxback Doc. # 38903 
 
 
Frequency Coverage: 
 
Ham:.........................................29-30 MHz (in 5 kHz steps) 
 
VHF Lo:......................................30-50 MHz (in 5 kHz steps) 
 
Ham:.........................................50-54 MHz (in 5 kHz steps) 
 
Aircraft:.............................108-136.975 MHz (in 25 kHz steps) 
 
Government:................................137-144 MHz (in 5 kHz steps) 
 
Ham:.......................................144-148 MHz (in 5 kHz steps) 
 
VHF Hi:....................................148-174 MHz (in 5 kHz steps) 
 
Ham/Government:.........................380-450 MHz (in 12.5 kHz steps) 
 
UHF Lo:.................................450-470 MHz (in 12.5 kHz steps) 
 
UHF T:..................................470-512 MHz (in 12.5 kHz steps) 
 
UHF Hi:.................................806-824 MHz (in 12.5 kHz steps) 
                                        849-869 MHz (in 12.5 kHz steps) 
                                        894-960 MHz (in 12.5 kHz steps) 
 
Channels:............................400 channels, 40 monitor memories, 
                                               and 10 priority channels 
 
Sensitivity (20 dB S/N): 
 
FM 
 
  29-54 MHz:...................................................1 microV 
 
  108-136.975 MHz:.............................................1 microV 
 
  137-174 MHz:.................................................1 microV 
 
  380-512 MHz:.................................................1 microV 
 
  806-960 MHz:.................................................2 microV 
 
 
AM 
 
  29-54 MHz:...................................................2 microV 
 
  108-136.975 MHz:.............................................2 microV 
 
  137-174 MHz:.................................................2 microV 
 
  380-512 MHz:.................................................2 microV 
 
  806-960 MHz:.................................................4 microV 
 
Selectivity:  
						

							 
  -6 dB:......................................................+/-10 kHz 
 
  -50 dB:.....................................................+/-20 kHz 
 
Spurious Rejection:...............................40 dB at 154 MHz (FM) 
 
Scanning Rate:.................................Up to 25 channels/second 
 
Search Rate:......................................Up to 50 steps/second 
 
Delay Time:...................................................2 seconds 
 
Intermediate Frequencies (IF): 
 
  1st:........................................................257.5 MHz 
  2nd:.........................................................21.4 MHz 
  3rd:..........................................................455 kHz 
 
IF Rejection: 
 
  257.5 MHz @ 154 MHz:............................................50 dB 
 
  21.4 MHz @ 154 MHz:............................................100 dB 
 
 
Squelch Sensitivity: 
 
  Threshold (FM and AM):.......................................1 microV 
 
  Tight (FM):.....................................................25 dB 
 
  Tight (AM):.....................................................20 dB 
 
Antenna Impedance:..............................................50 Ohms 
 
Audio Output Power (10% THD):.......................................1 W 
 
Built-in Speaker:........................................3 inch (77 mm) 
                                                    8-ohm, Dynamic Type 
 
Power Requirements:............................AC 120V, 60 Hz, 13 Watts 
                                                             + 13.8 VDC 
                    DC Cigarette-Lighter Power Cord (Cat. No. 270-1533) 
 
Current Drain (Squelched):.......................................140 mA 
 
Dimensions (HWD):.......................3 3/8 x 8 7/16 x 6 13/16 Inches 
                                                    (86 x 214 x 173 mm) 
 
Weight:................................................2.4 lbs (1.1 kg) 
 
Supplied Accessory:.............................................Antenna 
 
Specifications are typical; individual units might vary.  Specifications 
are subject to change and improvement without notice. 
 
U.S. PATENT NOS. 
 
3,961,261            3,962,644            4,027,251 
4,092,594            4,133,715            4,245,348  
						

							PRO-2041 Scanner 
(200-0463)                 Troubleshooting            Faxback Doc. # 38901 
 
 
If your scanner is not working as it should, there suggestions might help 
you eliminate the problem.  If the scanner still does not operate 
properly, take it to your local Radio Shack store for assistance. 
 
Problem                  Possible Causes               Remedies 
 
The scanner does not     The AC power cord is          Be sure the scanner 
work at all.             not properly connected.       is plugged into a 
                                                       working AC outlet. 
 
                         The optional DC               Be sure the power 
                         power cord is not             cord is fully 
                         connected.                    inserted into the DC 
                                                       13.8 V. 
 
Poor or no reception.     Improperly connected         Be sure the antenna 
                          antenna.                     is properly  
                                                       connected. 
 
                          Programmed frequencies       Avoid programming 
                          are the same as birdie       frequencies listed 
                          frequencies.                 under Birdie Fre- 
                                                       quencies in the 
                                                       General Guide to 
                                                       Scanning, Faxback 
                                                       Doc. # 38900 or only 
                                                       select them 
manually. 
 
Error appears.           Programming error.            Enter the frequency 
                                                       correctly, including 
                                                       the decimal point. 
 
Keys do not              Undetermined error.           Turn the scanner off 
work or display                                        then on again, or 
changes.                                               reset the scanner. 
 
Scanner is on            SQUELCH is not correctly      Adjust SQUELCH 
but does not             adjusted.                     clockwise. 
scan. 
 
In the scan mode,        Birdies.                      Avoid programming 
the scanner locks                                      frequencies listed 
on frequencies that                                    under Birdie 
have an unclear                                        Frequencies in the 
transmission.                                          General Guide to 
                                                       Scanning, Faxback 
                                                       Doc. # 38900 or 
                                                       only listen to 
                                                       them manually. 
 
RESETTING/INITIALIZING THE SCANNER 
 
If the scanners display locks up or does not work properly after you 
connect a power source, you might need to reset or initialize it. 
 
IMPORTANT:  If you have problems, first try to reset the scanner.  If that  
						

							            does not work, you can initialize the scanner; however 
            initializing clears all information stored in the scanners 
            memory. 
 
 
Resetting the Scanner 
 
1.  Turn off the scanner, then turn it on again. 
 
2.  Insert a pointed object, such as a straightened paper clip, into the 
    reset opening on the back of the scanner.  Then gently press and 
    release the reset button inside the opening. 
 
 
Initializing the Scanner 
 
IMPORTANT:  This procedure clears all information you stored in the 
            scanners memory.  Initialize the scanner only when you are 
            sure the scanner is not working properly. 
 
1.  Turn off the scanner, then turn it on again. 
 
2.  While holding down CLEAR, insert a pointed object, such as a 
    straightened paper clip, into the reset opening on the back of the 
    scanner.  Then gently press and release the reset button inside the 
    opening. 
 
    NOTE:  You must release the reset button before you release CLEAR. 
           Otherwise, the memory might not clear. 
 
3.  When the display reappears, release CLEAR.