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AOR AR One Ultra Wide Band Reciever Instructions Manual

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    The speed at which the receiver steps up or down depends upon the STEP SIZE which is   
    default to AUTO. In AUTO the step size, receiver mode etc. is taken from the factory   
    pre-programmed band plan but may be overridden at any time. 
     
    Push the UP arrow key to tune the receiver upward in whichever step size is selected, use   
    the DOWN arrow key to tune the receiver downward in frequency. 
     
    2-5 Changing receive mode 
    Due to the necessities of signal bandwidth, channel occupancy and transmission efficiency.   
    Different receive modes are used by various services. In addition to this specification for   
    tuning step and receive mode are allocated by departments of Governments following   
    international discussions so are not consistent throughout the world. For this reason, it is 
    necessary to change receive mode in order to monitor various transmissions. 
     
    For your convenience, receive mode and tuning step size have been pre-programmed into   
    the AR-ONE auto-mode band plan data at the factory to simplify operation of the receiver,   
    especially while you familiarize yourself with all functions. Should you wish, the defaults 
    may 
    be manually overridden at anytime so that you may select an alternative receive mode and   
    tuning step on any frequency. 
     
    AM  
    Amplitude Modulation – Used by broadcast services throughout the world on long wave, 
    medium wave and shortwave. AM is also used by VHF airband, UHF military airband and   
    some PMR (Private Mobile Radio) and utility services. 
     
    FM 
    There are two common types of FM (Frequency Modulation, these are: 
     
    NFM – Narrow Band Frequency Modulation – this provides high quality communication for 
    relatively short distance operation. FM uses a greater frequency bandwidth than other 
    modes such as SSM so is less efficient. 
     
    NFM is the most common mode used above 30 MHz with the exception of the airbands. 
    NFM is widely used on the VHF bands: VHF marine band, 2m amateur band, 70 cm   
    amateur band, PMR (Private Mobile Radio) and utilities.  
    						
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    In the absence of signal, the background white noise may appear quite loud. For ease of 
    listening, the squelch control should be rotated clockwise until he background noise just   
    disappears, this should be carried out while no signal is present. The point where the 
    background noise is cancelled is known as threshold point. Do not advance the squelch 
    control more than necessary or the receiver will appear to be desensitized and weaker 
    signals will be missed. 
     
    WFM – Wide Band Frequency Modulation – used by VHF and UHF broadcast stations as   
    excellent audio quality is available due to the relatively wide frequency bandwidth 
    employed. 
    Used only for local services such as VHF band stereo (received as mono on the AR-ONE) 
    and UHF TV sound channels. 
     
    LSB – Lower Side Band – is form of SSB (Single Side Band). LSB tends not to be used 
    commercially but is extensively used by Radio Amateurs on frequencies below 10 MHz. 
    This assists the separation of Commercial and Amateur users on traditionally shared bands 
    and prevents them from speaking to each other. 
     
    SSB is a very efficient method of transmission as the unwanted second sideband and 
    carrier 
    have been removed. This allows the full transmitter power to be employed in carrying 
    useful information within the wanted sideband. As a result, greater distances are possible 
    on 
    SSB and a smaller frequency bandwidth is required than most other modes. 
     
    USB – Upper Side Band – The same comments apply as for LSB. By convention, Radio 
    Amateurs also use USB above 10 MHz. 
     
    CW -    Continuous Wave – Often referred as Carrier Wave or Morse Code. Commonly 
    used 
    on the short wave bands by radio amateurs toward the lower end of each band allocation. 
    Some commercial use is still made by shipping etc although its use is being phased out 
    due 
    to the introduction of automated stations.   
     
    2-5-1 Auto-mode selection  
    						
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    When auto-mode is in operation, receive mode and tuning step size are automatically 
    selected for you by the AR-ONE microprocessor. 
     
    To activate auto-mode or reconfirm its selection while in VFO mode, 
    Push and hold the MODE key for more than 2 seconds. 
    The AUT icon appears on the top right portion of the LCD. 
     
    Note: Auto-mode is cancelled as soon as the receive mode, tuning step or other related 
    data 
    is changed. Remember that auto-STEP and auto-MODE are linked, reselect AUTO-MODE 
    if either have been adjusted and you require the auto bandplan selection. 
     
    2-5-2 Receive mode selection   
    Any receive mode may be selected at any frequency within the receiver’s frequency 
    coverage. To access the receive mode menu, push MODE, the following modes are   
    available: AUTO, WFM, NFM, USB, LSB, CW.    Use the main tuning dial or arrow key to 
    make selection. To accept the selection, push the ENT key.   
     
    2-6 Changing tuning STEP size 
    The specification for channel occupancy, step (separation) and mode are decided by and   
    allocated by departments of Governments following international discussions. 
     
    Not surprisingly the allocation of frequency bands are not the same all over the world and 
    channel separation (step) varies from band to band. As an example, the channel separation 
    (step) for the MW (medium wave) band in the U.S.A. is 10 KHz while in Europe and Japan 
    they are 9 KHz. 
      
    						
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    For above reasons it is necessary to alter the STEP size according to local bandplan   
    conventions. The AR-ONE has been pre-programmed at the factory with all the bandplan 
    data (specific to each market area) so that the AR-ONE will automatically select the 
    appropriate step size and mode for the frequency chosen. This greatly simplifies operation 
    of the receiver while you are familiarizing yourself with all functions. 
     
    The pre-programming of step size may be manually over-ridden so you may choose 
    alternative settings at will or when band plan are updated. 
     
    Should you wish to change the default tuning step size, push the FUNC key and then push   
    the VFO key. 
    The third row of the LCD will display the current default size.   
     
    The bottom line of the LCD displays the icon “STEP SET” to indicate that the AR-ONE is 
    waiting you to change the step size.   
     
    Use the main tuning dial or arrow key to select the desired step size. To accept the 
    displayed  
    tuning step size, push the ENT key. 
     
    The tuning step size may also programmed in 1 Hz (via the keypad) so that unusual step   
    sizes other than stated are possible. The acceptable step size range is less than 1 MHz in 
    1 
    Hz steps. 
     
    2-7 IF Bandwidth 
    The IF bandwidth selects how SELECTIVE the receiver will be when monitoring signals off    
    						
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    air. However, it is not simply a case of using the narrowest filter at all times, particular 
    modes 
    require differing amounts of bandwidth in order to operate otherwise the receive system   
    simply will not produce intelligible sound. 
     
    Correct receive mode and IF bandwidth must always be selected for optimum reception. If 
    the bandwidth selection is too narrow, distortion or signal break-up may occur. If the 
    bandwidth selection is too wide, adjacent interference may be encountered. 
     
    For this reason, a selection of IF filter bandwidths are fitted as standard. Typical examples 
    of  
    receive mode and IF bandwidth are: 
     
    300 KHz    -- VHF FM broadcast (220 KHz may be also be used – mono only) 
    200 KHz    -- VHF FM broadcast (110 KHz may be also be used – mono only) 
    100 KHz or 30 KHz – Wireless mic, etc. (30 KHz for satellite FAX, too) 
    16 KHz – PMR, amateur band, etc. FM 6 KHz may also be used 
    8.5 KHz or 6 KHz – VHF/UHF airband, short wave broadcast, medium & long wave, PMR,   
    etc. 
    3 KHz – Short wave amateur band, short wave utility such as oceanic airband etc. 
    0.5 KHz – Morse code used by radio amateurs and some marine traffic on short wave 
     
    An appropriate IF filter is automatically selected when automode is engaged. However any 
    combination of IF filter and receive mode is possible in the manual mode. When you have 
    manually selected an IF filter bandwidth, automode will be disengaged, but the receive   
    mode, step size, etc will be retained until they are changed manually. 
     
    2-7-1 Manually selecting IF bandwidth 
    Push the FUNC key, and then push the MODE key. 
    Selecting a new bandwidth from the list of 300, 200, 100, 30, 16, 8.5, 6, 3, and 0.5 KHz by 
    rotating the main tuning dial or arrow key. To accept the new bandwidth selection, push the   
    ENT key.  
    						
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    2-8 AGC (Automatic Gain Control) 
    To change the AGC
     parameter setting, push the FUNC
     key and then push the ATT 
    key. 
     
    Selecting a new AGC
     parameter from the list of MANU, FAST, MID, SLOW
     by rotating the 
    main tuning dial or arrow key. To accept the new AGC
     parameter, push the ENT 
    key. 
     
    When MANU
     is selected, a desired parameter can be entered between 0 ~ 255 
    in the   
    Configuration Menu. 
     
    2-9 ATTENUATOR  
    						
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    Activating attenuator reduces signal to the RF input stages of the AR-ONE to prevent 
    overloading due to connection to an external antenna or when the receiver is used in close 
    proximity to strong transmissions. 
     
    The AR-ONE has four settings for AT T (attenuator), 0 dB, 10dB, 20 dB, and AUTO. 
     
    To change the AT T parameter setting, push the ATT key. 
     
    Selecting a new AT T parameter from the list by rotating the main tuning dial or arrow key. 
    To  
    accept the new AT T parameter, push the ENT key. 
     
    When AT T is set to OFF, the ‘t0’ icon will display on the top right of the LCD,   
    When AT T is set to 10 dB, the ‘t1’ icon will display on top right of the LCD, 
    When AT T is set to 20 dB, the ‘t2’ icon will display on top right of the LCD.   
     
     
     
     
    2-10 RF AMPLIFIER 
    The AR-ONE features a preamplifier. The LCD icon “a” is used to display the setting in use.   
      
    						
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    To change the RF Amplifier setting, push the FUNC key and then push the 5 key. 
     
    Selecting a new AMP parameter from the list of ON, OFF, AUTO by rotating the main 
    tuning 
    dial or arrow key. To accept the new AMP parameter, push the ENT key. 
     
     
    2-11 OFFSET 
    This function enables receive frequency to be quickly SHIFTED by a predetermined values,   
    this makes it easy to track duplex-transmissions or check repeater inputs/outputs. Offset   
    frequencies may be factory pre-programmed into the auto-mode band plan data for some   
    world market areas. Frequency offset may also be programmed manually. 
     
    The locations for frequency offset storage are numbered 00 to 47 with 00 acting as OFF, 
    this 
    makes 47 locations available.   
     
    Frequency offset may be programmed into VFO, memory channel and search banks. It is 
    most convenient to set-up in VFO mode then save the data to specific memory channels 
    for quick recall at a later date. Frequency offset is primarily designed for memory channel    
    						
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    use, it may appear rather long winged to toggle on/off in VFO mode. However even when 
    programmed, frequency offset is in no way detrimental to normal operation. 
     
    The acceptable range of frequency offset is 0 MHz to 999.999 MHz, of course if the offset is   
    set to 0 MHz, the frequency will not change! Before the FREQUENCY OFFSET function 
    can 
    be used, it first needs to be configured (unless factory programmed for certain bands). 
     
    2-11-1 Using pre-programmed frequency offset data 
    To access the frequency offset set-up menu, push the FUNC key, and then push the . 
    (decimal) key. 
     
     
    The third line will display DUPLEX followed by the current offset channel number. 
    Use the main tuning dial or arrow keys to review the offset locations. The shift direction 
    can be changed by pushing the FUNC key. To accept the offset setting, push the ENT key. 
     
    2-11-2 Entering new frequency offset data 
    Assume that you are in VFO mode. 
    To access the frequency offset set-up menu, perform the following steps: 
     
    1.  Push the FUNC key, and then push the . (decimal) key. The third line will display   
    DUPLEX followed by the current offset channel number. 
    Use the main tuning dial or arrow keys to review the offset locations.   
    2.  Push down arrow key. The cursor will move down to the bottom line of the LCD.   
    3.  Enter the desired offset in MHz format. The shift direction can be changed by pushing   
    the FUNC key.  
    						
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    4.  To accept the offset setting, push the ENT key.  
     
     
    3    Memory channels & banks 
    It is convenient to store commonly used frequencies into a memory channel along with 
    mode etc, this saves having to key the data in over and over again. Memory read is very   
    straightforward and quick when compared to retyping all data. 
     
    3-1 Memory channel overview 
    Think of memory channels as pages in a notebook each of which is numbered to identify it.   
    Data may be written to each new page (memory channel) and each page may be   
    overwritten with new data, they can be used over and over again. The AR-ONE has 1,000  
    memory channels and a priority channel. 
     
    Each memory channel may hold: 
     
    zOne receive frequency 
    zReceive mode 
    zTuning step 
    zFrequency offset 
    zAttenuator setting 
    zText comment of up to 12 characters 
     
    The alphanumeric comment may be used to ease identification at a later date and to 
    provide 
    text search function. The 1,000 memory channels are divided into 10 banks, each having 
    100 channels. The memory banks are identified by the first BANK number 0, 1, 2, 3, 4, 5, 
    6.  
    7, 8 and 9 and the individual channels are numbered from 00 to 99. 
      
    						
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