PRO-2004 Programmable Scanner (200-0119) Operation

Turn on your PRO-2004 by rotating the OFF/VOLUME clockwise.  When first
turned on, your PRO-2004 might start scanning.  Rotate the SQUELCH fully
counterclockwise.  You'll hear a rushing noise from the speaker - if not,
rotate the VOLUME control a little further clockwise - and the scanning
will stop.  Slowly rotate the SQUELCH clockwise until the noise stops and
scanning resumes.  You are now ready to start entering frequencies.


The liquid crystal display (LCD) on your PRO-2004 displays the channel
number, the frequency being received, status of different functions, DELAY
or LOCK OUT, and current operation mode.  As they move on and off the
display, you can note the current operation mode.   On the display, the
line under the bank number shows you which bank you are working with.  The
numerals below the bank number on the keyboard show you the channel numbers
in each bank.  Bank 1 holds channels numbered 1 through 30, bank 2 holds 31
through 60, and so on through bank 10, which holds the channels 271 through

BATTery Indicator

When the memory backup battery power becomes low, the [BATT] indicator
appears on the display and the PRO-2004 gives off a beeping alarm sound.
Replace the battery promptly.

ERROR Indicator

Sometimes when you try to enter a frequency for a channel or as a search
range limit, you will find an ERROR on the display and hear three beeps.
This means the frequency chosen is in error, and you won't be able to enter
it into your PRO-2004.

Such frequency errors usually mean you've attempted to enter a frequency
outside the range of your PRO-2004, such as 550.000 MHz, or you've put a
decimal point in the wrong place; for example, 14.682 MHz instead of 146.82
MHz.  Check your entry carefully and then press [CLEAR].  You can now enter
the correct frequency.

The ERROR indicator also appears when you try to enter channel number 
outside the limits of the PRO-2004, such as channel 500.

About those Banks...

The PRO-2004 has ten banks for continuous storage, plus an eleventh bank
for temporary storage.  Think of it in this way: it's like storing gold in
a bank.  You have so much gold that one safety deposit box cannot hold it
all.  So, you rent additional safety deposit boxes.  When you have filled
all the boxes in one bank, you put the excess into another bank.

Now, suppose you are still searching for additional gold.  If you are
undecided about the disposition of a gold strike, whether to store it or to
spend it, you can place it in a special services bank for temporary

Permanent-Memory Storage Bank

Your PRO-2004 has a comparable storage system for radio frequencies.  It
has 10 banks and each bank has 30 storage compartments (like safety deposit
boxes) which are called channels.  Into each bank, you can safely deposit
as many as 30 frequencies.  Because there are 10 banks with 30 channels
each, you can ultimately store a total of 300 frequencies.  The smaller
numbers on the keyboard indicate which channels are allocated to each bank.
When the frequencies have been stored, you can scan the banks to find a
specific channel.

Temporary-Memory Storage Bank

In the search mode, when you discover a new frequency, you can place it in
the temporary storage bank.  Think of this eleventh bank, special services
bank, as the MONITOR bank.  It not only helps you, in a rapid search, store
new frequencies, it also performs rapid transfer to any of the other ten
banks.  On the display, MONITOR indicates that you are using this bank.
When in the monitor mode, the ten numbers at the top of the display
represent ten channels in which newly-discovered frequencies may be stored

NOTE:  Monitoring can only be accomplished in conjunction with "search".
       See "Storing Frequencies with Monitor Channels".

The blinking number is the MONITOR channel in use.


The PRO-2004 has 10 search banks for setting the lower limit or upper
limit of the search range.  The display shows the search bank numbers.


The PRO-2004 has four separate operating modes:  programming - manual -
scanning - searching operation


Programming the PRO-2004 is as simple as 1-2-3 as follows:

1.  Select the desired channel.

2.  Press [PROGRAM] to enter the programming mode.

3.  Enter the desired frequency with the keypad and press [ENTER].

NOTE:  If you are uncertain about specific frequencies in your local area,
       Radio Shack's "Police Call Directory Including Fire & Emergency
       Services" is an excellent reference.

Example:  To program 162.55 MHz into channel 30

Select the channel in one of three ways:


a.  Press [MANUAL].  Continue pressing until the display shows channel
    30.  Release the button.

     - or -

b.  Press [3] [0] [MANUAL].  In either case, press [PROGRAM] to enter
    the programming mode:

      - or -

c.  Press [PROGRAM].
    Press [3] [0]
    Press [PROGRAM].


Press the keys 1 6 2 . 5 5


Press [ENTER]

To program the next frequency, move to another channel in this way.  Press
[PROGRAM] to advance to the next channel.

Repeat the same steps to add more frequencies.

Hints and Tips for Programming

If you make a mistake while entering a number, press [CLEAR] and re-enter
the correct frequency.  If you enter a frequency that is outside a PRO-2004
band range, the ERROR indicator lights along with a beeping sound.  Press
[CLEAR] and select another frequency.  Any frequency within a PRO-2004 band
range will be accepted.  However, the frequencies that can be stored into
PRO-2004 memory are in either 5 kHz steps or 12.5 kHz steps.  The scanner
will automatically round off the entered frequency to the closest valid
frequency.  For example, if you enter 125.2345 MHz, the PRO-2004 will
accept this entry as 125.2300 MHz.  The entry 398.2640 MHz will be treated
as 398.2625 MHz.  The tuning range of your PRO-2004 is permanently stored
in the microprocessor chip and external memory.  It cannot be extended or
altered.  So if you try to enter a frequency not in the PRO-2004 tuning
range, you'll always get an error message.  If you want to change the
frequency entered for a specific channel, enter the new frequency over the
old one, following the steps under Programming Frequencies.


When you want to stay on a frequency, either in scan mode or search mode,
press [MANUAL].  In the manual mode, you can manually advance through the
memory channels by pressing [MANUAL] repeatedly.  Or enter the channel
number and press [MANUAL] to reach the desired channel directly.  Also note
that in manual mode you can access locked out channel(s) or skipped


Your PRO-2004 will automatically scan all the channels you have programmed
and stop whenever it finds a signal.

Important!  Your PRO-2004 won't scan unless SQUELCH is set to the point
where no "hiss" sound is heard between transmissions.

To stop scanning, press [MANUAL].  You then can select a specific channel
you want to listen to.  Enter the channel number, then press [MANUAL].  Or
press [MANUAL] and continue pressing until you reach the frequency you


In the scanning mode, your PRO-2004 will stop when it finds a channel with
a signal.  As soon as signal stops, it immediately begins scanning other
channels.  Since most transmissions are part of a two-way communication,
you may wish to press [DELAY] when you wish to continue listening to a
specific channel.

Press [DELAY] when you wish to hold a channel you are listening to.

Your PRO-2004 will then hold the channel at least two seconds after each
transmission, giving you time to listen to both sides.  

DELAY appears on the LCD to show that the delay function is engaged for
that channel.  To cancel the delay function, press [DELAY] again.  The
display indicator disappears.


Scan stops when a signal is picked up on a frequency.  However, if you
wish to re-initiate scanning, press [SCAN] to forcibly begin scanning.


When the power switch is turned on, the scanning rate is set to 16 
channels/second.  Pressing [SPEED] alternates the scan speed between 8
channels/second and 16 channels/second.

Locking Out Frequencies (Skipping Frequencies)

You might want your PRO-2004 to skip certain frequencies while it's
scanning (such as continuously transmitted weather broadcasts).  To lock
out such channels:

1.  Press [MANUAL] to stop scanning.
2.  Continue pressing [MANUAL] until you reach the channel you want to lock
    out.  If you know the channel number(s), this can be done more quickly.
    Enter the channel number, then press [MANUAL].

3.  Press [LOCK-OUT].  The indicator appears on the display, indicating
    this channel will be skipped during scanning.

NOTE:  In manual scanning, you can continue to access the locked-out

To cancel the lockout function:

1.  Press [MANUAL] to stop scanning.

2.  Advance to the channel that is locked out.

3.  Press [LOCK-OUT] again.  LOCK-OUT disappears from the display.

4.  Or, press [LOCK-OUT REVIEW] in MANUAL or PROGRAM mode to call out
    locked-out channels one by one.  Then, press [LOCK-OUT] to cancel
    LOCK-OUT for that channel.

You can lock out as many channels as you like.  But each bank must have
at least one channel not locked out.  The last channel in a bank cannot
be locked out.


At initial 'power-on', all the banks are available to be scanned.  You can
skip one entire bank while scanning.  This is convenient when there are no
frequencies entered in the bank, so there is no need to scan through it. 
Do not use the LOCKOUT key to skip banks. Instead, follow this procedure:

Turn power on, and in the SCAN mode, press the number key that corresponds
to the bank to be skipped.

Example:  To skip banks 4, 5, 9 and 10

Press 4  5  9  0

Note that you enter '0' for bank 10.

The corresponding bank number indicator disappears from the display
and the entire bank is skipped.

Press the number key again to restore the bank.

Example:  To restore scanning banks 4 and 5 

Press 4   5.

Each number on the keyboard has figures; these figures show the channel
numbers that are allocated to that particular bank.  As with the lockout
function, you cannot skip all the banks.  The 'last' bank cannot be


You can scan other channels and still not miss a transmission of special
interest to you (police, fire, ambulance, etc.).  If a call is received on
the priority channel while you are scanning other channels, your PRO-2004
will automatically switch to the priority channel.

Programming the Priority Channel

At initial 'power on', Channel 1 is automatically designated as the
priority channel.  So if you enter a frequency of particular interest in
channel 1, you need not do anything further.  But, if you want to use
another channel as the priority channel, press [PROGRAM], enter the channel
number and press [PRI].  Only one channel can be set as the priority
channel.  If you enter a new priority channel, the previous channel chosen
is automatically cleared.

Example:  To set channel 20 as priority

Press [PROGRAM].
Press [PRI].

You can verify the priority channel by pressing [PROGRAM] then [PRI].  The
P on the display will light when you scan the priority channel.  Press
[PRI] again to revert to previous channel.

Using Priority

The priority function is available only in scan or manual mode.  Press
[PRI] to activate it.  PRIORITY appears on the display.

The receiver will check the priority channel and switch to it if a signal
is present.

To cancel priority, press [PRI] again.  PRIORITY disappears from the

NOTE:  All the settings of delay/lockout/speed/priority mode/step/skipping
       banks are retained even when you turn power off.  The next time you
       turn the power on, the same settings, as when you turned the
       PRO-2004 off, are in effect.


To search for a transmission within a specific range of frequencies, press
[PROGRAM], enter the limits of the frequency range, and press [Up-arrow] or
[Down-arrow] to activate "search".

You can command up to 10 frequency ranges into a search bank.

Lower limit 25 MHz and Upper limit 1300 MHz are initially set in Search
Bank 1 - 10.

Press [PROGRAM].

Select a search Bank with numeric key 1 - 10 and press [LIMIT].  Enter 0
for search bank 10.

Example:  To search in Bank 5 between 452.625 and 452.915

    Press [5] [LIMIT].

    Enter the lower limit of frequency range to be searched.  

    Press [4] [5] [2] [.] [6] [2] [5] [ENTER].

    Press [LIMIT].

    Enter the upper limit of frequency range to be searched.

    Press [4] [5] [2] [.] [9] [7] [5] [ENTER].

Activate "search" by pressing [Up-arrow] or [Down-arrow].  [Down-arrow]
starts search from the highest frequency and goes down.  [Up-arrow] moves
in the opposite direction.

NOTE:  If search does not start after pressing [Up-arrow] or [Down-arrow],
       try adjusting SQUELCH.

    Press [Up-arrow].

    Press [SPEED] to accelerate or to slow down the search.

NOTE:  You can program LIMIT frequencies and STEP as you like, but SEARCH
       may not necessarily work right under certain conditions.

Example:  If you select a range of 100.005 and 100.045 using step
          equal to 50 kHz

    Set 100.005 MHz lower limit.

    Set 100.045 MHz upper limit.

Note that when above frequency range and STEP of 50 kHz are set,
frequencies which correspond with the STEP are not usable.  This is due to
the fact that the difference between the upper and lower limits selected is
LESS than the step frequency of 50 kHz.

In this situation, if you press [Up-arrow]:

    Press [PROGRAM]->[LIMIT] to extend the LIMIT frequency range.


In MANUAL or PROGRAM operation mode, press [DIRECT] and then [Up-arrow] or
[Down-arrow] to search up or down from the displayed frequency.

    Press [PROGRAM].

    Press [DIRECT].  The step frequency is displayed.

    Press [Up-arrow].

NOTE:  When [DIRECT] is pressed during limit search, the PRO-2004 enters
       DIRECT search.  When a numeric key (1, 2...0) is pressed during a
       DIRECT search, it goes to limit search through the search bank
       corresponding with the numeric key.


Search - whether limit or direct - stops when a signal is picked up on a
frequency.  When the frequency is not the one desired, press [Up-arrow] or
[Down-arrow] to continue the search.

Band Mode and Frequency Steps

Your PRO-2004 is designed to adjust itself for the band modes and
scanning/searching steps for each frequency range, as shown in the table

 |              FREQUENCY VS. MODE & STEP                   |
 |Frequency (MHz)      | MOD     |       Step (kHz)         |
 |   25.000~  29.995   |  AM     |        5                 |
 |   30.000~  87.495   | NFM     |        5                 |
 |   87.500~ 107.995   | WFM     |       50                 |
 |  108.000~ 135.995   |  AM     |      12.5                |
 |  136.000~ 224.995   | NFM     |        5                 |
 |  225.000~ 520.000   | NFM     |      12.5                |
 |  760.000~ 824.995   | NFM     |      12.4                |
 |  825.000~ 844.995   | NFM     |       30                 |
 |  845.000~ 869.995   | NFM     |      12.5                |
 |  870.000~ 889.995   | NFM     |       30                 |
 |  890.000~1300.000   | NFM     |      12.5                |

WFM: Wideband FM for normal FM broadcast or TV sound.
NFM: Narrowband FM for action radio bands, police, fire, ambulance,
     ham radio, etc.
AM:  For aircraft band, CB, etc.

To see how it works, try searching the range of 85 - 110 MHz.

Press [PROGRAM] [1] [LIMIT] [8] [5] [ENTER].  The bottom line of the
display shows NFM mode and 5 kHz step, which is the assigned band/step for
85 MHz.

Press [LIMIT] [1] [1] [0] [ENTER].  The 110 MHz is AM aircraft band range,
so the bottom line changes to AM 12.5 kHz.

Press [Up-arrow] to start search and watch the bottom line - as you press
[Up-arrow] it changes to NFM 5 kHz.  When the search reaches 87.5 MHz,
which is normal FM broadcast band, the bottom line changes to WFM and 50

It further changes to AM 12.5 kHz when the search passes 108 MHz.

Normally, the preset mode/step works as indicated within each band.
However, for a part of the ham radio band, the aircraft band outside the
108 - 136 MHz and the TV audio, you will have to change the mode and/or
steps manually.

To do this, use the MODE and STEP switches.  To change mode, press [MODE].
Each time you press it, the mode changes in the order of AM - NFM - WFM. 
To change steps, press [STEP].  The step changes in sequence 5 kHz - 12.5
kHz - 50 kHz.  Note that when you change the preset modes/steps, the
corresponding display flashes to show you that you changed the default

When you want to return to the default setting, press [RESET].  The display
stops flashing.

Keep in mind that the improper setting of the mode/steps can result in poor
reception.  When you listen to an FM broadcast or TV sound in the NFM mode,
the sound will be much distorted.  If you hear a police band in WFM mode,
the sound will be masked by noise.  Or if you use 5 kHz or 12.5 kHz step to
search FM broadcast or TV sound, the search may stop on the sideband of a
frequency; press [Up-arrow] or [Down-arrow] to get the center frequency. 
If you use 50 kHz step for NFM band, you may miss the in-between
frequencies of 50 kHz step.

Limit search break frequency memory

When limit search breaks in manual, program, scan, direct search, etc., the
break frequency is memorized, and resumes the limit search from that

NOTE:  When lower or upper limit of a limit search is changed, and if the
       break frequency is within the limit frequency range, the search
       starts from the break frequency.  If the break frequency is out of
       the new limit frequency range, the search starts from the lower or
       upper limit frequency.


Your PRO-2004 incorporates a Zeromatic circuit to receive correct
frequencies during search.  However, if during search in the VHF/UHF TV
band, it accepts the side band frequency of TV sound; set the mode to WFM,
step to 50 kHz or press [Up-arrow] or [Down-arrow] to receive correct

The Zeromatic circuit may not work correctly when 5 kHz step search takes
place in the 760 MHz to 1300 MHz band.


Search stops when a signal is picked up on a frequency.  As soon as the
signal ends, searching resumes.  Most transmissions are part of a two-way
communication.  Delay allows for pause between transmissions.

Press [DELAY] when you wish to remain tuned to a frequency.  Your PRO-2004
will hold the frequency at least 2 seconds after each transmission - giving
you time to listen to both sides of the transmission.

To cancel the delay function, press [DELAY] again.

Storing Frequencies in Monitor Channels

Your PRO-2004's Temporary Memory Storage Bank has 10 monitor channels.
During search, you can store one frequency into each channel.

1.  To search for transmissions, press [PROGRAM].  The 10 numbers at the
    top of the display now function as channels in which new frequencies
    may be placed for temporary storage.  Enter limits of frequency range,
    and press [Up-arrow] or [Down-arrow] to activate 'search'.

2.  When the search stops on a frequency you want, to store it press
    [MONITOR].  This freezes search, and records the frequency in one of
    the 10 monitor channels.

3.  LCD displays (MONITOR "1" 2 3 4 5 6 7 8 9 10)  Channel number to be
    stored flickers.

4.  Press [Up-arrow] or [Down-arrow] to resume searching.  If you find
    another frequency of interest, press [MONITOR] again to store it in the
    monitor channels, 1 through 10.  If you try to store frequencies in
    more than 10 channels, the channel cycles back to 1 and you will write
    the new frequency over the old one, and the old frequency will be

Moving Frequencies from Monitor Channels to Permanent-Memory-Storage Banks

You can move a frequency from a monitor channel to permanent storage by
simply pressing [ENTER].  There is no need to record each frequency and
re-enter it, one by one.

All that is necessary is to select the channel in which you wish to store
the newly-found frequency now in temporary storage.  Then, recall the
monitored frequency to the display.  Next, press [ENTER] to store the
frequency in permanent memory.

Example: To transfer 95.100 from temporary bank to Bank 9 permanently

1.  Press [PROGRAM].  Press the channel number you want to use.  Then press
    [PROGRAM] again.

2.  Press [MONITOR].  The display shows the monitor channels.  The last
    monitor channel entered and its frequency is displayed.

3.  Press [MONITOR] as many times as required to arrive at the monitor
    channel that contains the frequency you want moved to permanent
    storage.  Or, because you are now in the monitor mode, you may use the
    keyboard to select the number of the monitor channel.  You will see the
    frequency you want moved on the display.

    Press [2].

4.  Press [ENTER].  This transfers and stores the frequency into the chosen
    permanent-memory channel.

5.  If you want to store more frequencies, select another memory channel by
    keying in the number and [PROGRAM].  Then follow step 2 through 4

    The frequencies in the monitor channels will remain unchanged until you
    wish to search for, and enter, new frequencies.  When you wish to
    verify the transfers, return to the permanent memory display by
    pressing [MANUAL].  The display shows you have returned to the normal
    mode.  The word, BANK, appears at the top of the display.  Press
    channel number and [MANUAL] for checking the memory content of a
    specific channel.

To store a frequency into the permanent-memory channel during Search Mode

1.  Use MANUAL or PROGRAM to select an open channel or a channel which has
    a frequency that you no longer want stored.  For example, suppose you
    select channel 260.

2.  Pres [Up-arrow] or [Down-arrow] to start search.

3.  When you arrive at the frequency you want to store, press [MONITOR].
    The permanent memory channel will be displayed (channel 260).

4.  Press [ENTER] and channel 260 stores 350.0125 MHz and automatically
    starts search.  Then, the permanent-memory channel advances by one

5.  To store another frequency into the permanent-memory channel, repeat
    steps 3 and 4 e.g. Press [MONITOR][ENTER] and store 350.1625 MHz into
    channel 261.

NOTE:  By repeating MONITOR - ENTER you advance the permanent memory
       channel and at the same time, you store the new frequencies.  Any
       previously stored frequencies are written over.  So, to be sure 
       before you proceed, you should check and review the frequencies
       already stored.

Sound Squelch

Even when the PRO-2004 stops at a frequency during either scan, search or
priority modes, sound squelch enables the operation to start again if the
frequency contains no sound, i.e. carrier only without modulated signal.

1.  Press SOUND SQUELCH switch, the LED lights.

2.  When the PRO-2004 stops at a frequency which has no sound, it remains
    there for 0.5 seconds, and then goes to the next frequency if sound is
    not detected within that time.

3.  When a frequency which contains sound is received, it halts at the
    frequency.  But,

    a.  If the sound ceases during the reception, it stays on the frequency
        for 5 seconds, and resumes scanning.

    b.  If the frequency stops sending a carrier, the unit reverts to scan
        immediately if DELAY is off, after 2 seconds, if the DELAY is

4.  To cancel sound squelch, press SOUND SQUELCH switch again.  The LED
    goes off.

NOTE:  If a frequency contains a transmission with low modulation, the
       sound squelch circuit may not work properly.


To delete channel frequency display (zero display).  Press [PROGRAM]

Clearing Entire Memory

To clear all memories, press and hold [CLEAR].  Then press the RESTART
switch on rear panel, with power switch on.