AOR 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.