AOR AR5000 Operating Manual page 26

The audio high pass filter selection is accessed via a
sub menu.
kHz
kHz <<<
kHz
1. Press
low pass filter selection, press the
the high pass filter sub menu.
2. Rotate the
0.2 kHz, 0.3 kHz or 0.4 kHz.
3. Press to accept the changes,
or to move on to the audio de-emphasis selection.
3 Audio De-emphasis
This is really only applicable to FM mode and affects the
sharpness of recovered audio. Band-II transmissions in
different world areas have different defaults for de-
emphasis, if for instance a value of 750 is selected in
Europe the recovered audio will sound very muffled .
The available range is as follows:
THRU, 25uS, 50uS, 75uS & 750uS
The audio de-emphasis will initially be automatically
selected according to the IF bandwidth:
Bandwidth Receive Mode
0.5k to 15 kHz FM
Above 30 kHz FM
AM,LSB,USB,CW
The audio de-emphasis selection is accessed from a
sub menu.
kHz
kHz
kHz
1. Press
low pass filter selection, press the
the high pass filter sub menu then press
access the de-emphasis menu.
2. Rotate the to make selection: THRU, 25uS,
50uS, 75uS & 750uS.
3. Press to accept the changes,
or to move on to the audio CW pitch selection.
PAGE 26 AR5000 OPERATING MANUAL
. The LCD will first display the
key to access
to make selection: 0.05 kHz,
to abort
De-emphasis
750uS
75uS
THRU
. The LCD will first display the
key to access
again to
to abort
4 CW Pitch
Comfortable listening to CW (Continuous Wave, often
referred to as Morse code) is usually centred around a
tone of 700 to 800 Hz. The audio stage of the AR5000 is
configured to emphasise this window , however the centre
frequency may be changed to suit personal preferences
or specific requirements. This function is valid only when
CW mode is used for reception.
The selectable range (pitch) is as follows:
0.4 kHz (400 Hz), 0.5 kHz (500 Hz), 0.6 kHz (600 Hz),
0.7 kHz (700 Hz) default, 0.8 kHz (800 Hz), 0.9 kHz
(900 Hz), 1.0 kHz (1000 Hz) & 1.1 kHz (1100 Hz).
1. Press
the low pass filter selection, press the
access the high pass filter sub menu, press
again to access the de-emphasis menu then press
again to access the CW PITCH sub menu.
(Alternatively press
kHz
kHz
kHz <<<
2. Rotate the to make selection:
0.4 kHz, 0.5 kHz, 0.6 kHz, 0.7 kHz, 0.8 kHz, 0.9 kHz,
1.0 kHz or 1.1 kHz.
3. Press to accept the changes,
or to move on to the audio internal / external
selection.
5 Input Switching
The audio path is switchable either directly to the audio
amplifier or via the front panel accessory socket (ACC 1)
where it may be looped back into the receiver for passage
to the audio amplifier after some form of external
processing has taken place (tone unit, DSP filter etc). The
default is INT for INTERNAL.
To access the audio switching menu:
kHz
kHz
kHz
1. Press
low pass filter selection, press the
the high pass filter sub menu, press
the de-emphasis menu, press
CW PITCH sub menu then
audio switching menu. (Or use the
2. Rotate the to make selection: INT or EXT
. The LCD will first display
to abort
. The LCD will first display the
key to access
again to access
again to access the
again to access the
key once !)
key to
).