AOR AR-2700 Wideband Reciever Operating Manual

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The flashing legend “BANK” appears in the
top left corner of the LCD with the current
bank number shown directly underneath.
The UPPER and LOWER program search
bank limits will alternate on the LCD along
with the legends “HI” and “Lo”.
To view the limits of a different program
search banks use the UP / DOWN keys or
[DIAL] to make the selection.
To return to program search mode press [ENT] otherwise the receiver will
return to program search mode automatically after about 30 seconds.
Alternatively should you wish to return to a different program search bank,
press a numeric key corresponding to the search bank required (no [ENT] is
required).
11-5  Programming and reprogramming PROGRAM SEARCH BANKS
You may wish to specify your own frequency limits or modes for program
search banks, you may also reprogramme any which may be already
pre-programmed.  There are 10 program search banks in total identified as
banks 0, 1, 2, 3, 4, 5, 6, 7, 8 & 9.
Example of reprogramming a search bank - “5”
For example, to reprogramme the data contents of search bank “5” to the
following parameters:
Low frequency 433.000 MHz
High frequency 433.600 MHz
Receive mode FM
Step size 25 kHz steps
Attenuator OFF
Starting to reprogramme
Use the key sequence [2ndF] [SRCH] to initiate the process or programming a
search bank.  The flashing legend “SEARCH” indicates that reprogramming is
in process.
Selecting the bank
Use the UP / DOWN keys, [DIAL] or
numeric keypad to select the desired
program search bank for reprogramming.
Press [ENT] to accept the selected bank.
In this example press [5] [ENT]
Selecting receive mode
The current upper and lower frequencies will alternate on the LCD along with
step size and receive mode, this helps acknowledge that the correct bank has 
						

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been selected.  If no frequency data is currently stored the legend “- - -” will be
displayed.
Use the UP / DOWN keys or [DIAL] to select the required receive mode.  If the
alternating frequency is distracting, press one of the numeric keys so that the
display “- - -” is presented.
If “PROG” is selected then the receive
mode and step will be taken from the
automatic bandplan data, in this case the
selection of step will be skipped.
To accept the choice of receive mode
press [ENT].
In this example select “FM” then
press [ENT]
Selecting step size
If the mode selection has previously been made as “PROG” then the receive
mode and step will be taken from the automatic bandplan data and this item
will be skipped.
To select the step size use the UP / DOWN keys or [DIAL].  The choices are as
follows:
NFM & AM: 5kHz, 6.25kHz, 9kHz,
10kHz, 12.5kHz, 20kHz, 25kHz,
30kHz, 50kHz & 100kHz.
WFM: 50kHz & 100kHz.
To accept the choice press [ENT].
In this example select “25kHz” then
press [ENT]
Selecting attenuator On / Off
Use the UP / DOWN keys or [DIAL] to select the appropriate setting for the
attenuator.  On is when the receiver is least sensitive, Off is when the receiver
is most sensitive.  The legends are “on” or “oFF”, the usual setting is Off.
Other legends at this time will be a
flashing “ATT”, steady “PROG” and
flashing “SEARCH”.
To accept the choice of attenuator press
[ENT].
In this example select “oFF” then
press [ENT] 
						

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Setting the LOWER frequency limit
The legends at this time are a steady
“PROG” and flashing “SEARCH”.  To the
left of the frequency readout is the legend
“Lo” to indicate that the lower frequency
limit is required.
Enter the lower frequency then press
[ENT].
In this example type [4] [3] [3] [MHz] [ENT]
Setting the UPPER frequency limit
The legends at this time are a steady
“PROG” and flashing “SEARCH”.  To the
left of the frequency readout is the legend
“HI” to indicate that the upper frequency
limit is required.
Enter the upper frequency then press
[ENT].
In this example type [4] [3] [3] [MHz] [6] [ENT]
THE REPROGRAMMING IS NOW COMPLETE AND THE RECEIVER WILL
ENTER PROGRAM SEARCH MODE AND WILL START SEARCHING.
Notes on program search bank programming
There is no need to delete program search bank data before programming.
If data is already present, it may simply be over-written.
Should you initiate program search bank programming while in search mode,
the receiver will return to search mode, similarly with scan and manual mode...
within reason, the receiver will return to where it left off.
Aborting program search programming
To ABORT the the process of programming a search bank at any time
press [CLR].
11-6  Program search bank linking
When shipped from the factory using default settings all search banks are
UNLINKED so may only be searched on an individual basis by selecting the
search bank identifier via the numeric keypad (“0”, “1”, “2” etc).
It is possible to quickly link search banks together so they will be searched as
one group (handy for breaking down a large frequency range into smaller more
manageable ranges).  It is possible to select any number of banks to be
scanned as a group such as 2, 4, 5, 6 & 9. 
						

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To LINK ALL search banks the “SEARCH
LINK” menu is used.  To access the menu
use the key sequence [2ndF] [SRCH] with
the [SRCH] key held for more than 1.5
seconds.  The legends “SEARCH” “LINK”
will appear on the top row to show that the
menu has been selected.
The top left corner of the LCD will show
the legend “oF” or “on” (OFF or ON)
depending upon the selection of BANK
LINK.  To toggle the selection of bank link,
rotate the [DIAL] and the legend will
toggle appropriately.
The left of the “oF / on” legend and lower
row of the LCD provide places for all ten
search banks.  To 
add more banks to the
bank link list simply press the appropriate
identifying search bank number using the
numeric keypad, the number legends will
toggle On and Off... the legend “ - “
depicting Off (unselected).
To accept the new list and setting press [ENT].
The next time the receiver enters PROGRAM SEARCH MODE with bank link
specified as On, the legend “SEARCH” “LINK” will be displayed and a large
group of search banks will be sequentially searched together as one large
group.
11-7  Searching a search bank which is 
not selected in BANK LINK
It is still possible to SEARCH a single deselected bank by manually bypassing
the BANK LINK programming.  To SEARCH 
any deselected bank simply key
the desired identifying bank number through the keypad while in search mode.
Only the search bank manually selected will be searched.
(12)  Sleep timer - automatic power Off
The AR2700 is fitted with a SLEEP timer which is capable of
automatically switching the receiver Off after a prescribed time period.
This can be useful if you use the receiver at bedtime, listening to local radio
amateur repeaters etc as you slip off into sleep.  Alternatively if you leave the
house while the receiver is still monitoring, you can be confident that the
receiver will soon switch Off so saving you having to immediately recharge the
NiCad batteries upon your return to home. 
						

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12-1  Enabling SLEEP time
If the sequence [2ndF] [5] is keyed, the
sleep timer is enabled.  A clock legend will
be displayed on the lower right of the LCD
and the receiver will automatically switch
Off after the programmed sleep time has
expired.  The default is 60 minutes.
To de-activate the sleep timer key the
sequence [2ndF] [5] a second time, the
clock legend will be removed from the LCD.
12-2  Defining the SLEEP time period
The SLEEP timer may be programmed
between 1 and 120 minutes in one minute
increments.  Use the key sequence [2ndF]
[5] with the [5] key held for more than
1.5 seconds. The new value may be
keyed through the numeric keypad or
the UP / DOWN keys may be used or
the  [DIAL].  To accept the new value
press [ENT].
(13)  Optional VOICE recording facility
The AR2700 may optionally be fitted with an internally fitted VOICE recording
chip (RU2700) enabling digital recording of 20 seconds of transmission.  The
advantage of this method of record is that the record facility is always available
and everything is self contained and extremely portable.
The recording may be re-played over and over again and is not lost even where
the power is switched Off or batteries exhausted.
13-1  Initialising the record option
To initiate the recording facility after installation of the RU2700 optional chip
switch the receiver Off.  Switch the receiver back On again by holding 
both
the [PWR] key and [6] key for more than 1.5 seconds.  Release both keys
and a selection menu will be presented.
If the receiver refuses to enter the setup
menu switch Off, leave the receiver for a
few minutes and try again.  Failing this,
power the receiver On while holding the [0]
key then release, power Off and try again.
The “REC” legend will be flashing to
indicate that the options menu has been 
						

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selected.  The selection of RECORD On and Off is made using the [DIAL] with
legends “oFF” and “on” confirming selection.  To accept the displayed selection
press [ENT].  The set will quickly display all LCD segments then power On as
normal.  The option will now have been added or removed from the keypad
operation as appropriate.
Note: When in the setup menu, the UP / DOWN keys toggle between the
RECORD and DESCRAMBLE option setup routines.
13-2  Recording
To make a recording, tune the receiver to
an active frequency and key the sequence
[2ndF] [4] with the [4] key held for more
than 1.5 seconds, the legend “REC” will
be displayed on the LCD and the current
displayed frequency will be recorded for
20 seconds (presuming that the optional
record chip has been fitted).
The signal meter acts as a “progress meter” to illustrate how much record and
play back time has elapsed.
The record facility may be used in MANUAL mode, or even when scanning or
searching.
13-3  Play back
To replay a previously recorded
transmission, key the sequence  [2ndF]
[4].  The legend “PLAY” will be displayed
on the LCD and the 20 second digital
recording will be replayed (presuming that
the optional record chip has been fitted).
If the optional chip has not been fitted then
white noise will be heard.
The signal meter acts as a “progress meter” to illustrate how much record and
play back time has elapsed.
(14)  Remote control using a computer (RS232C)
The AR2700 is capable of remote control using a computer such as
an IBM compatible and control software.  An adaptor (IF-ADP) and
small external interface (CU8232) and lead are required and
available as options.
Further information will be provided with the optional
CU8232 interface unit. 
						

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14-1  Setting the RS232 parameters
The RS232 parameters may be altered using the SERIAL menu.  This menu is
accessed with the sequence [2ndF] [UP] with the [UP] key held for more
than 1.5 seconds.
The flashing legend “SERIAL” appears on
the LCD to indicate that the RS232 menu
has been accessed.
The RS232 baud rate is indicated on the
left of the LCD (for example 9600 bps) and
may be changed to 4800 or 2400 bps
using the  [DIAL].  The baud rate will be
displayed in sequence on the LCD.
It is also possible to add a LINE FEED to the data, this is accomplished by
using the [UP] or [DOWN] keys.  The legend “LF” to the right of the baud rate
indicates when the LINE FEED has been added.
To accept the currently displayed value press [ENT].
Due to the characteristics of the EEPROM and receiver circuits, the choice of
RS232 communications speed between the receiver and computer may not
greatly affect the operational efficiency.  Of course, correct operation will only
be achieved when the parameters are all matched between the computer and
AR2700.
(15)  Clone (copy) data between two AR2700 receivers
It is possible to clone (copy) ALL data from one AR2700 to another AR2700
receiver.  This is a useful facility when two friends each have the AR2700
receiver and wish to share data.
The optional adaptor (IF-ADP) and interface (CU8232) is required.  Further
information will be provided with the optional adaptor and interface.
15-1  Transferring data by CLONE
Connect the two AR2700 receivers together using the optional adaptor
(IF-ADP) and interface (CU8232) using the cables provided with the options.
Decide which receiver is going to SEND
the data and which is going to RECEIVE.
You cannot specify what data is to be
transferred, ALL data must be sent.
The process of copying data is initiated
using a menu which is accessed with the
sequence [2ndF] [UP]. 
						

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The flashing legend “SERIAL” appears on
the LCD with a larger display of “COPY
SEnd”.  The UP / DOWN keys or [DIAL]
may be used to select SEND MODE
“COPY SEnd” or RECEIVE MODE
“COPY rCV”.
First select the AR2700 which will
RECEIVE the data and press [ENT] to
accept the COPY RECEIVE command.
The first segment of the signal meter will appear to confirm that command has
been accepted and the receiver is ready to accept data via the RS232 port.
Secondly select the AR2700 which will SEND the data and press [ENT] to
accept the COPY SEND command.  The first segment of the signal meter will
appear to confirm that command has been accepted and the receiver will start
to send data via the RS232 port.
Both AR2700 signal meters will increase to indicate the transfer of data
between receivers, the transfer will take several minutes.  When the process is
complete the LCD display will return to normal operation.
Note: Ensure that the batteries are 
fully charged before attempting data clone
otherwise data corruption may take place.  It may be a good idea to power the
receiver from a DC supply while copying data.
(16)  Trouble shooting
Should you experience problems with the receiver “apparently doing something
unexpected”,  simply switch Off the receiver using the main power switch and
leave it for about 10 seconds.  Switch the receiver back on again and check if
the problem has been cleared.
Failing this, try removing one battery (or disconnecting the power), leave the
set for about one minute, re-fit the battery and try again.
If the receiver still refuses to respond as expected, try a microprocessor reset
as shown on section 16-1 of this operating manual.
16-1  Microprocessor reset
Should the receiver still refuse to operate correctly you may RESET the
microprocessor using one of the following three sequences (try method 1 first
then method 2 then method 3).
Method 1 - [CLR] key
Should you experience a programming / operational problem with the AR2700,
you may “soft” reset the microprocessor by holding the  [CLR] key while 
						

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powering up the receiver.  Your memory bank and search bank data will
remain intact but any linked banks, frequency pass data etc will be lost.
Method 2 - RESET switch, left side panel
A “soft” microprocessor reset may also be accomplished by momentarily
pressing the reset switch located on the left hand cabinet using a pointed
utensil such as a pin, small screwdriver, sharp pencil etc.  It does not matter if
the receiver is switched On or Off at the time.
Your memory bank and search bank data will remain intact but any linked
bank data etc will be lost.
Method 3 - FULL reset [CLR] + [ENT] keys
DO NOT USE THIS KEY SEQUENCE UNLESS ABSOLUTELY NECESSARY.
A FULL MICROPROCESSOR reset is accomplished by holding both the
[CLR] and [ENT] keys while switching On the unit using the [PWR] key.
All memory channels, search banks, pass channels etc will be lost and blank.
As a result the search and scan facilities will not operate until new data has
been entered.  Note: It is quite normal for the set to take about 30 seconds
to recover from a FULL reset as all data is being deleted !!!  Often there is
no external indication that a reset is in progress so be patient, following a FULL
reset the receiver will power On and the display will show 80 MHz.
16-2  Other possible operational problems
Signals are weak
Check that the attenuator is not switched On (the legend “ATT” is not displayed
on the top line of the LCD).
Ensure the correct receive mode is being used (AM for airband, NFM for point
to point communications - not WFM etc).
Frequency jumps a few kHz
If you have altered the tuning step size for VFO or SEARCH mode, remember
that the receiver frequency must be divisible by the step size.  If it is not, the
AR2700 will correct the displayed frequency to the nearest kHz which is
divisible.
Frequencies and memory channels are skipped
Ensure that the frequencies are not in the PASS list and memory channels not
locked out “CH PASS” by reviewing memory contents in memory recall. 
						

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The receiver stops on blank carriers
The receiver may stop on blank carriers.  It may be that these are true
transmissions (you can usually remove the aerial to determine this).
Alternatively the AR2700 (like all receivers) will produce spurii in certain places
such as 129.600 MHz, 144.000 MHz and 158.400 MHz as examples.  You may
use the PASS facility to reduce their annoyance to a minimum.
The display blinks and changes
Ensure that the PRIORITY facility is not engaged.  If it is, the legend “PRIO”
will be displayed on the second line of the LCD toward the upper right hand
corner.
Receiver does not switch on
In using NiCad batteries, charge them using the charger provided or connect
the receiver to a vehicle cigar lighter socket using the DC lead provided.  If you
are using dry batteries, replace them with a fresh set.
If this does not help
If the above does not help, please contact your supplier for assistance.
16-3  Other LCD indications and error messages
“BEEP” & “BOOP”
The keypad usually produces a high pitch “beep” when the correct key or
sequence is followed.  Should an inappropriate key be pressed, a lower pitch
“BOOP” will be produced.  It is possible to switch the beep & boop On/Off
using the key sequence [2ndF] [PASS].
A “boop” will be emitted if you attempt to scan or search when no data has
been programmed.. following a FULL microprocessor reset for example.
BATTERY LOW special indicator
The special on-screen battery indicator provides a constant indication of
battery level.  Once the unit indicator drops to “one block” then it is time to
recharge or replace the batteries as the unit may stop functioning at any time.
“PLL Err” - PLL ERROR
This indicates that the PLL (Phase Lock Loop) has unlocked.  This is the
system used by the receiver to select and change frequency.  Ensure that the
frequency is within the receivers specified frequency coverage of 500 kHz
(0.5 MHz) to 1300 MHz.
A PLL ERROR message may also be displayed if the batteries are near to
exhaustion.