AOR AR7030m Operation Information Manual

							AR7030 OPERATING MANUAL          PAGE 1
1 Contents
2 Introduction, overview & quick reference  .... 2
2-1 Accessories supplied
2-2 Overview - Read this if nothing else
2-3 Quick reference
2-4 Menu tree
2-5 Remote controller quick reference
3 Major Features  ............................................... 7
4 Precautions  .................................................... 8
4-1 Location
4-2 Looking after your receiver
4-3 Power requirements
4-4 Aerial (antenna) connection
5 Controls and functions  .................................. 9
Front panel:-  ................................................... 9
5-1 On/Off power switch
5-2 Liquid Crystal Display (LCD)
5-3 Main rotary tuning control - MAIN DIAL
5-4 Fast tuning button
5-5 Mode selection buttons
5-6 Volume control
5-7 Spin-wheel
5-8 General button
5-9 Memory menu button
5-10 RF and IF settings button
5-11 Filter menu button
5-12 Headphone socket
5-13 Bail bar
5-14 Internal speaker
Rear panel:-  ...................................................    10
5-15 Computer control socket
5-16 Auxiliary equipment socket
5-17 DC power input
5-18 External speaker output socket
5-19 Display contrast adjustment
5-20 Ground (chassis) connection
5-21 Wire aerial connection
5-22 Antenna selection switch
5-23 50 OHM aerial socket
Infrared controller:-  .......................................    12
5-24 Filter change key
5-25 PBS change key
5-26 Treble change key
5-27 Bass change key
5-28 Increase and decrease keys
5-29 Tune-up and Tune-down keys
5-30 Volume increase and decrease keys
5-31 Store into memory key
5-32 Memory preview key
5-33 Change VFO key
5-34 Mode select keys
5-35 Number keys
5-36 Backspace key
5-37 Clear key
5-38 Memory recall key
5-39 Frequency entry keys6 Receiver operation - Main functions  ............     14
6-1 First switch-on
6-2 Filter calibration
6-3 Memory restoration
6-4 Changing receive frequency
6-5 Changing reception mode
6-6 IF filter bandwidth selection
6-7 Passband Shift (PBS)
6-8 Audio tone controls
6-9 RF Gain (Attenuator and Preamp)
6-10 Automatic Gain Control (AGC)
6-11 IF Gain control
6-12 Squelch control
6-13 Beat Frequency Oscillator (BFO)
7 VFO functions  ................................................    22
7-1 Tuning control LOCK
7-2 Selecting VFO-A and VFO-B
7-3 Dual VFO operation
8 Memory facilities  ...........................................     24
8-1 Preview memory contents
8-2 Store into memory
8-3 Recall from memory
8-4 Memory scanning
8-5 Memory technical details
9 Setup, Timer and Config menu options  .......     28
9-1 Setup menu options
9-2 Timer settings
9-3 Setting the clock
9-4 Config menu options
10 Optional accessories  ....................................     30
11 Aerials (Antennas) and earth systems  .........     31
12 Propagation - short wave bands  ..................     32
13 Technical specification  .................................     33
13-1 Block diagram  ..............................................    IBC 
						

							PAGE  2          AR7030 OPERATING MANUAL
2 Introduction
Thank you for purchasing the AOR AR7030 high dynamic
range, short wave, all mode receiver. The AR7030 is
designed using the very latest DDS (Direct Digital
Synthesis) technology to ensure the highest levels of
performance and reliability. A TCXO (Temperature
Compensated Crystal Oscillator) is provided for high
stability.
To get the best possible results from your AR7030 we
recommended that you carefully read this manual and
familiarise yourself with the receiver. Many apparent faults
are often due to accidental mis-operation of the receiver
so, if you think there is a problem, carefully read all of the
manual before deciding to return the receiver for repair.
Every effort has been made to make this manual correct
and up to date. Due to continuous development of the
receiver and by error or omission anomalies may be found
and this is acknowledged.
© This manual is protected by copyright AOR
Manufacturing Ltd 1995, 1996. No information contained
in this manual may be copied or transferred by any means
without the prior written consent of AOR Ltd. AOR and
the 
 logo are trade marks of AOR Ltd. All other
trade marks and names acknowledged. E&OE
2-1 Accessories supplied
Mains power supply
Infrared remote controller and batteries
Operating manual
2-2 Overview - read THIS if nothing else
The AR7030 receiver pushes forward the frontiers of
performance and microprocessor operation. In order to
get the very best out of the receiver you will need to
carefully read through all the sections of this handbook,
however there are a few points worth noting first:-
a.The receiver has been designed to be compact and
robust enough for transportable operation, and as such
there are relatively few front panel controls. The infrared
remote controller should be considered as an extension
of the front panel, offering single button access to many
primary functions. The receiver can be operated without
the infrared controller but more button presses may be
required to perform the same operation.
The infrared control input is accepted by sensors on both
the front and rear panels of the receiver. If you cannot
reliably enter commands with the controller in close
proximity to the front panel, move it to one side of the
receiver and make sure that an object behind the receiver
will provide a reflection into the rear sensor. The infrared
controller is powered by two AAA size 1.5V batteries
(supplied) which have to be fitted before it can be used...
observe the polarity carefully.
You cannot harm the receiver by pressing buttons, turning
knobs or exploring the menu options - experiment without
worry. Only by using the receiver will you become fully
conversant with its operation.If you really mess up the settings, a LOAD DEFAULT
facility has been included so that you can return the set to
its out-of-box condition (except for frequency memory
contents). Loading the defaults will ensure:- sensible filters
are selected for each mode of reception, no PBS offset,
no BFO offset for CW and DATA modes, maximum IF
gain with AGC on, auto synchronous AM, auto RF
attenuation, flat tone control settings, standard line output
levels etc.
To load the default settings, press 
 (to return to the
SETUP menu), rotate the spin-wheel 
 one click anti-
clockwise so that the legend Deflt Set is displayed, and
then press the 
 button. Loaded .. is briefly displayed
in place of the clock to confirm selection.
Should the filters appear incorrectly aligned or non-
symmetrical, please refer to FILTER CALIBRATION in
section 6-2 and look through section 6-1.
b.The receiver does not have a standard format of
display readout - it can be configured to display time or
pass band shift or filter selection or treble / bass tone
selection or VFO selection or AGC or memory
configuration... whatever YOU choose. The spin-wheel
  and the   button will retain their last assigned
functions when the 
 button is pressed allowing a
selected function to be changed whilst the S-meter is
displayed.
To return to the SETUP menu and CLOCK display, press
. To display the S-meter and return to the root level
of the menu system, press 
.
You may tune the receiver, change the volume and
reception mode or select fast tune whilst any menu is
shown on the display because these front panel controls
have only one dedicated function. These are fixed controls,
and are indicated in this manual with white lettering on a
black background, similar to the lettering on the front panel.
Similarly the 
 and  buttons always have a
defined function. The other receiver controls, arranged
beneath the display, are referred to as SOFT-KEYS,
because their function varies according to the context of
the selected menus. In these cases the control description
is displayed on the receiver’s LCD and in this manual with
black lettering on a grey background. When no menu is
displayed on the LCD - when the S-meter is shown - then
the underlying buttons select the menu indicated on the
panel:- MEMORY, RF / IF or FILTER.
c.Each mode can have, and will retain, a different filter
bandwidth (chosen from those available), pass band shift
(PBS) setting, BFO setting and AGC speed. When
adjusting any of these settings the values are changed
only for the current mode selected. Squelch value for NFM
mode is held separately from the value for all other modes. 
						

							AR7030 OPERATING MANUAL          PAGE 3
d.It is possible to save and load up to three of your
favourite receiver set-ups, one for casual listening, one
for serious DXing, one for data communication or whatever
you choose. Each mode can have your own choice of
filter bandwidth, pass band offset, BFO setting and AGC
speed, along with global settings of the tone controls,
auto / manual synchronous AM, auto / manual RF
attenuator and line output levels. All these settings can be
held in one of the SETUP MEMORIES, A, B or C. Using
the setups can avoid having to recall many different menus,
and provides a useful short cut to changing listening
modes.
The setup memories are accessed through the SETUP
menu by turning the spin-wheel 
 until the required
memory (A, B or C) is selected along with the required
function:- 
 to setup the receiver with the settings
held in the memory or 
 to transfer the receiver’s
settings into the memory. Press the 
 button to actually
load or save the setup.
e.The AR7030 has two VFOs, A and B - (Active and
Background). Each VFO holds settings of volume, tone,
receive frequency, reception mode, filter bandwidth, PBS,
BFO, RF attenuator, IF gain, AGC speed, squelch, scan
delay time and scan mode. The contents of the VFOs
can be exchanged using the 
 button, only the active
VFO can be tuned.Note: The background VFO data will be lost when power
to the receiver is switched off.
f.The 100 frequency memories store receiver
frequency, reception mode, filter bandwidth, PBS offset
and squelch level. BFO frequency is stored instead of
squelch level for in CW and DATA modes. Once recalled,
(into the active VFO) it is possible to tune away from the
memory data or change mode at will - for this reason
there is little point in storing the same frequency with
different modes in different memories, even when DXing
a broadcast where AM, USB, LSB or Snc modes might
be needed.
Memory contents are not modified by changing any
receiver settings - they will only alter if the 
 button
is pressed. Any previous contents are then overwritten.
g.The receiver’s display is split into several different
areas. The current FREQUENCY and MODE are always
visible, but other information varies depending upon the
operating condition and the menus selected. This
illustration may be useful for reference.
1Auxiliary information (volume, squelch etc)
/ keypadentry
2Receive frequency
3Reception mode
4Attenuator (A) or preamplifier (P) indicator
5Signal strength meter (S-meter)
6Squelch open / close indicator
7Fast tuning indicator
8Dial lock indicator
9Spin-wheel 
 function
10
 button function
11, 12, 13Menu button functions 
						

							PAGE  4          AR7030 OPERATING MANUAL
2-3 Quick reference guide
Key
Buttons shown white on black are labelled on the front panel, for example  
Buttons shown black on grey are soft-keys labelled on the display, for example  
The spin-wheel is labelled on the display and shown with up/down arrows, for example  Gain
Soft keys shown with a bullet after the legend operate as toggles (on / off). The bullet shows the current state -
solid for on and hollow for off.
Power
To turn the receiver on, press To turn the receiver off, press   or  
Display
To display the S-meter, press To display the clock press 
Filters
To change filter, press   and use  or Alternatively, cycle through filters with 
To shift the filter passband, press    and use  PBS
To adjust audio frequency in CW and DATA modes, press 
    and use  BFO
To adjust audio tone, press 
    and then use  Treb or   Bass as required
RF and IF Gain
To adjust RF gain, press   and use  or  for adjustment in 10dB steps
To adjust IF gain, press 
  and use  Gain (for RF and IF controls together)
OR press 
      and use  Gain (for IF gain with filter bandwidth)
Squelch
To adjust squelch level, press    and use  Sql (for squelch with dual VFO)
OR press 
   and use  Sql (for squelch with memory scan)
OR press 
   and use  Sql (in NFM mode for general listening)
With squelch active 
 will mute the receiver’s audio with no signal, and  will stop scanning if a
signal is present
Memories
To select and preview a memory, press   and use  Mxx
To recall from a memory (into the VFO), press 
 , use  Mxx to preview then press 
To store into a memory (from the VFO), press  , use  Mxx to preview then press 
Scanning
To set scan speed, press     and use  Dly (for dual VFO scanning)
OR press 
    and use  Dly (for memory scanning)
To scan the two VFOs, press 
    
To scan memory channels, press    
To set memory block for scanning, press     then use   From
        or 
   To
To exclude memories from scan, press 
 , use  Mxx to select then press 
Clock and Timer
To set timer run time or sleep time, press    and use  Mins and 
To set timer start time, press    and then use  Hrs or   Mins as required
To set clock time, press 
     and then use  Hrs or   Mins as required
To start sleep mode countdown, press 
  
To arm timer for switch-on, press    
						

							AR7030 OPERATING MANUAL          PAGE 5
2-4 Menu structure 
						

							PAGE  6          AR7030 OPERATING MANUAL
2-5 Infrared remote controller - quick reference
Key
 Number key 0 through to 9
 Backspace key (deletes last numeric keypress)
 Clear key (deletes whole numeric entry)
All keys labelled + or - will auto-repeat if held pressed.
Tuning
To enter a frequency directly, press       
    OR press        
Frequencies can have any number of digits, with or without a decimal point, up to a maximum of 9 characters.
Resolution of entries can be to 1Hz, with the receiver rounding to the nearest tuning step.
Frequencies of 50kHz or less are taken as tuning step size, not as receiver frequency.
To tune the receiver in steps, press 
 or  (step size set as described above).
To switch between active and background VFOs, press 
 (VFO-A is copied to VFO-B if B is not already set).
Volume
To change the volume setting, press  or 
Mode
Mode key  selects CW mode or NFM mode if CW is already selected.
Mode key 
 selects LSB mode or USB mode if LSB is already selected.
Mode key 
 selects AM mode or Sync mode if AM is already selected.
Filters
To change the selected filter, press  then  or 
To move the filter passband, press  then  or   To clear PBS offset, press  
To alter the audio tone, press  or  then  or 
Memories
To select and preview a memory, press     (one or two digits may be entered).
To preview the currently selected memory, press 
To select next or previous memories, press  or  after  or  have been pressed.
To select and recall a memory (into the VFO), press 
    (one or two digits may be entered).
To recall the currently selected memory (into the VFO), press 
To recall the next (and subsequent) memories (into the VFO), press  . .  . .   etc.
To select a memory and store (from the VFO), press 
    (one or two digits may be entered).
To store into the currently selected memory (from the VFO), press  
						

							AR7030 OPERATING MANUAL          PAGE 7
3 Major Features
The new AR7030 is the result of a combined project
between AOR and internationally acclaimed UK designer
John Thorpe. The AR7030 represents the very latest and
best ever “JT” design concentrating on exceptional strong
signal handling with enhanced microprocessor features
and facilities. It is manufactured by AOR
MANUFACTURING LTD based in Derbyshire, UK.
¬ Excellent strong signal handling
In Europe, especially at night, strong signal handling is of
prime concern and this is where the AR7030 stands ahead
of the field - offering an IP3 greater than +30dBm (typically
+35dBm, reduced by about 10dB with the preamp
switched on) and dynamic range greater than 100dB in
AM mode with a 5.5 kHz filter and greater than 105dB in
SSB mode with a 2.2 kHz filter. This fantastic strong signal
handling is made possible by the innovative configuration
of a lateral DMOS FET QUAD first mixer running at 15V,
relay switching in the front end (instead of the more usual
diodes) and the use of shielded inductors throughout the
signal path.
¬ High sensitivity and selectivity
All this and great sensitivity - better than 0.5uV for 10dB
S/N in AM mode and better than 0.3uV for 10dB S/N in
SSB (with the preamp switched on). Selectivity too is razor
sharp offering greater than 95dB @ 10kHz SSB and
almost 110dB @ 20kHz.No other receiver in its class, nor
indeed at a considerably higher price can match the sheer
performance excellence of the AR7030.
¬ High Tech
The receiver is built around a TCXO frequency standard
which provides the reference for all its circuitry, ensuring
the ultimate in stability and optimum alignment. A single
loop DDS system provides the clean local oscillator
essential for low reciprocal mixing levels and seamless
tuning in approximately 2.7Hz steps (no tuning “plops” at
regular intervals). The receiver is a double conversion
super heterodyne with intermediate frequencies of 45MHz
and 455kHz.
The IF filters are self-aligned by the receiver using
advanced microprocessor control, ensuring “spot on”
alignment and symmetry of passband characteristics
essential for serious ECSS listening. The main PCB will
accept a number of different filters including various Murata
types and Collins mechanical units, all will be self-aligned!
The displayed filter bandwidths are not fixed but actually
measured by the receiver permitting various displays such
as 2.2kHz, 2.3kHz, 2.4kHz, 2.5kHz etc depending upon
the particular filter fitted.
¬ Computer control port
Virtually every aspect of the AR7030 is controllable via
the REMOTE port. The AR7030 may be connected
directly to a host computer such as a PC (via RS232 link)
with which, for example, frequency memories may be
loaded, frequency and mode changed and signal activity
logged - expanding the listening station even further.
¬ All mode receive over a wide
    frequency range
All reception modes are available as standard: USB, LSB,
CW, AM, Synchronous AM, NFM, DATA. The receive
coverage is 0 - 32 MHz, the AR7030 has not been disabled
below 150 or 30 kHz, or made insensitive in the medium-
wave band. The standard fitted IF filters include: 2.2kHz,
5.5kHz, 7.0kHz and 10kHz with two additional positions
available for CW or other filter options.
¬ Auto synchronous tuning
The receiver is capable of tuning itself automatically in
synchronous AM mode using a new variable bandwidth
synchronous detector. Simply select synchronous mode,
tune the receiver to approximately the correct frequency
so that intelligible audio can be heard and wait... within a
few seconds the AR7030 will sample the frequency, tune
to the carrier (its great watching it tune itself!) and lock
solidly onto the station. Should you prefer, you may select
fully manual operation of the synchronous detector.
¬ Pass band tuning
    (even on synchronous AM)
Enhanced features include pass band tuning of approx
±4.2kHz, variable audio pitch on CW and DATA modes
and an advanced, self tracking, synchronous detector for
AM listening to eliminate the effects of transmitter or
receiver drift as well as reducing distortion from selective
fading. The pass band tuning may be used in synchronous
AM mode to select synchronous USB, LSB, DSB or
anything in between.
¬ Full AGC control plus IF gain
A specially developed AGC release characteristic
produces outstanding SSB quality with quick recovery from
strong signals and noise spikes. Gentle signal compression
has also been included to reduce the audible effects of
noise pulses. An IF gain control is available along with
three AGC speeds and AGC defeat.
A built-in six level attenuator provides many levels of
sensitivity:- +10dB, 0dB, -10dB, -20dB, -30dB and -40dB,
however given the excellent strong signal handling of the
AR7030 this is going to be a control rarely required! The
receiver can automatically switch in the attenuator to keep
incoming signals within its AGC range. Of course you may
manually select attenuation should you prefer.
¬ Aerial input including whip amplifier
The rear panel of the AR7030 has inputs for a wire aerial
with ground connection, 50 OHM SO239 connection plus
selection of a high impedance whip amplifier which is fitted
as standard.
¬ Audio output
Audio output is of high quality and clear tone when using
the built-in top mounted speaker. A 3.5mm external
speaker jack is provided on the rear panel which mutes 
						

							PAGE  8          AR7030 OPERATING MANUAL
the internal speaker, the amplifier provides more than 2
WATTS of audio - there are even treble and bass controls.
A stereo 3.5mm front panel socket provides headphone
output from a separate internal stereo amplifier and may
drive mono or stereo ‘phones. The auxiliary outputs (left
and right) have separately adjustable levels and may be
used to drive an external recorder or data decoders.
¬ Dot matrix LCD
A 48 character, rear illuminated dot matrix LCD with rear
panel adjustable contrast provides a huge amount of
information, a wide range accurate signal meter and text
based menus.
¬ Assignable controls
Assignable controls enable you to place the functions YOU
want at your fingertips - they retain the last used operation
when the menus are removed, and include a press button
 and a spin-wheel .
¬ Infrared remote controller
A full featured 32 button infrared remote control is provided
as standard and provides access to all commonly used
facilities, including: tuning, volume, tone, memory
functions, pass band shift and filter selection, as well as
providing a numeric keypad for direct frequency entry.
TWO infrared sensors are employed, one on the front
panel and one on the rear, so that the controller may be
used from almost any position around the receiver.
¬ Stylish strong cabinet
The AR7030 features a custom CNC machined solid
aluminium front panel with extruded aluminium shaped
sides, metal top, bottom and rear panels. The front panel
finish is brushed and anodised with the sides and other
surfaces toned in a matching textured paint. Smooth
curved lines, detailed panel breaks, top mounted domed
speaker grille and ergonomically placed controls spell out
the attention to detail of this robust, solid cabinet.
4 Precautions
4-1 Location
Do not use or leave the receiver in direct sunlight
(especially the LCD). It is best to avoid locations where
excessive heat, humidity, dust and vibration are expected.
Always treat the receiver with care.
Take care to avoid spillage or leakage of liquids into the
receiver and a.c. power supply. Special care should be
taken to avoid liquid entering around the controls, through
the speaker grille or via the connection jacks.
Avoid static discharge from aerial systems especially when
using long wires - earth them to a central heating radiator
or similar earthing point in order to discharge the wire
before connection to the receiver. Always disconnect and
earth any external aerial system if an electrical storm is
expected.Avoid a rapid disconnection then reconnection of the power
supply. If disconnected, leave at least two seconds before
reconnecting again. Ensure that all power connections are
secure.
Avoid strong RF fields from nearby transmitters. If in doubt,
disconnect the AR7030 from the aerial and switch the set
off.
4-2 Looking after your receiver
Always keep the receiver free from dust and water. Use a
soft, dry cloth to gently wipe the set clean. Never use
abrasive cleaners or organic solvents which may damage
certain parts.
4-3 Power requirements
The AR7030 is designed for operation from its supplied
mains adapter. Operation is possible from a d.c. supply
of 12 to 15V, which should be able to supply up to 800mA,
but for full performance always power the receiver from
15V d.c rather than from 12V. (The receiver’s frequency
coverage is not guaranteed above 30 MHz when operating
from a 12V supply).
EMC NOTICE - This receiver may not fully comply
with the E.C. EMC directive if operated from an
external power source other than the supplied AC
adapter.
The d.c. input socket uses a 2.1mm coaxial power
connector, and a 14mm long plug is recommended. This
connector is configured CENTRE POSITIVE, the chassis
of the receiver is at negative ground. The low noise power
supply provided is pre-wired and provides a regulated 15V
d.c. output with suitable connectors being fitted as standard
for the a.c. mains input and connection to the AR7030.
The AR7030 has a rear panel socket for connection of an
RF earth, allowing a separate earth to be taken to a water
pipe, central heating system radiator or external earth rod.
If fitting a separate external earth rod, consider the
implications carefully if your mains supply uses a Protective
Multiple Earth (PME) system. If in doubt consult an expert
electrician. Never earth to a gas pipe!
SAFETY NOTICE - Always disconnect the power
supply from the a.c mains when not in use.
4-4 Aerial (antenna) connection
The AR7030 has two aerial inputs, selected by a rear panel
switch, allowing three basic types of connection (the actual
choice of suitable aerial is almost limitless).
1. 50 OHM (unbalanced) SO239 socket for connection
of dipoles, long wires with matching devices, active aerials,
verticals, yagis etc.
2. WHIP may be selected to activate an impedance
matching amplifier when a telescopic aerial or very short
wire is fitted to the 50 OHM SO239 socket.
3. WIRE aerial input is used for connection of long wire
or similar relatively high impedance aerial systems. 
						

							AR7030 OPERATING MANUAL          PAGE 9
5 Controls and functions
Front panel
name for a tuning mechanism, in this operating manual it
is referred to as the MAIN DIAL.
The receiver tunes in a very smooth manner with
increments as small as 2.655 Hz. Excellent tuning
dynamics increase the rate of tuning depending upon how
fast the tuning control is rotated and the mode of reception.
It is possible to electronically lock the main dial to prevent
accidental tuning. A lock indication (reversed L) is
displayed on the LCD in this case.
5-4 Fast tuning button 
FAST tuning increases the speed of tuning when using
the main dial. The letter F is displayed after the kHz of the
frequency display when fast tuning is selected - the 
button switches this mode on and off. If tuning in automatic
synchronous AM, the fast tuning mode is cancelled
automatically when the receiver samples frequency and
locks onto the transmission.
5-5 Mode selection buttons
        
 
The mode selection buttons are located in the top right
corner of the front panel. They select all of the available
modes in sequence: Dat (data reception), CW, LSB, USB,
AM, Snc (synchronous AM) and NFM, the sequence then
repeating. The current mode is displayed to the right of
the frequency readout on the LCD.
5-1 On/Off power switch 
This button, located in the upper left corner of the front
panel, switches the set on and off and selects the SETUP
menu for general configuration of the receiver and setting
of the clock and timer facilities.
To switch the receiver on, connect a suitable power source
and press the power switch 
 for about one second.
To switch the receiver off, press the power switch 
TWICE, or use the  soft-key from the SETUP menu.
When switched off, whilst the receiver is still connected to
its adapter, the clock time display will continue with a dim
backlight.
5-2 Liquid Crystal Display (LCD)
Display of operating condition is provided by a high
contrast, green backlit, dot matrix LCD. Information
includes frequency, mode, bandwidth etc. Menu legends
for the controls beneath the display are also provided along
with an accurate 70 segment signal strength meter
(S-meter).
5-3 Main rotary tuning control
        - MAIN DIAL
The large rotary tuning control is prominently located to
the right of the front panel. This control changes the
received frequency up and down. Often referred to as the
VFO (Variable Frequency Oscillator), a rather historic 
						

							PAGE  10          AR7030 OPERATING MANUAL
5-6 Volume control
The volume is adjusted by the rotary encoder located in
the lower left of the front panel. The volume level is
displayed as a percentage on the top left of the LCD whilst
the control is turned. The range is 0% (minimum) to 96%
(maximum).
Note: It is normal for very low level audio to emanate
from the speaker even when the volume is at 0%,
especially in NFM mode.
5-7 Spin-wheel 
This encoder is used to make selections from various
menus and to change the values of receiver settings such
as pass band shift (PBS), IF gain, squelch etc. The function
of the spin-wheel at any instant is displayed above it on
the LCD.
5-8 General button 
This button is used to make selections from menus as a
soft-key. The assigned function is displayed above it on
the LCD.
5-9 Memory menu button 
Initially used to choose the MEMORY menu for selection
of memory channel, scan parameters and audio mute. It
is also used as a soft-key to make selections from other
menus.
5-10 RF and IF settings button 
Initially used to choose the RF gain / attenuator, IF gain
and VFO selection menu. It is also used as a soft-key to
make selections from other menus.
5-11 Filter menu button 
Initially used to choose the filter bandwidth display
/ selection menu along with pass band shift (PBS) and
audio tone control. It is also used as a soft-key to make
selections from other menus.
5-12 Headphone socket
This 3.5mm socket will provide output to either stereo or
mono headphones, no switching is required. Connection
to this socket disables the internal speaker and any
speaker connected to the rear EXT LS socket.
Headphones should be of a nominally low impedance
around 8 to 200 OHMS.
5-13 Bail bar
The front of the receiver may be lifted up clear of the
table top to allow easy access to the front panel controls
and clear visibility of the LCD. Pull the bar forward to lift
the front of the receiver upward, rubber cushions prevent
slipping on a table top.
5-14 Internal speaker
The AR7030 is fitted with a top mounted loudspeaker
which provides excellent audio reproduction under most
conditions.
Rear panel