PAGE 66 AR5000 OPERATING MANUAL
Assuming that power is connected to the AR5000 and
the power switch is currently OFF, press and hold
key then power up the receiver by pressing and
releasing the
switch while still holding the
key. Now release the
key. The “
DE-SCR
DE-SCR
DE-SCR
DE-SCR
DE-SCR
”
descrambler will now be added to the OPTION menu as
the first item accessed by pressing
15-2 Descrambler operation
Of course you first need to find a transmission which has
been scrambled by frequency inversion! Assuming that
you have located such a transmission, optimum intelligibility
is obtained through an LCD indication which varies
between 0 and 127.
1 To access the descrambler menu press
.
The LCD legend “
DE-SCR
DE-SCR
DE-SCR
DE-SCR
DE-SCR
” confirms selection.
DE-SCR OFF <<<
DE-SCR OFF <<<
DE-SCR OFF <<<
DE-SCR OFF <<<
DE-SCR OFF <<<
CTCSS OFF
(if CT5000 option is fitted)
DTMF OFF
T-ELMT OFF
The
MAIN DIAL
or
SUB DIAL
are used to make selection for
optimum reception through the range 1 to 127 and OFF.
The
key may be used to short cut the selection
between current value and OFF.
2 Rotate the
MAIN DIAL
or
SUB DIAL
until the audio (voice)
becomes intelligible. Press
to increment OFF and
ON (at the previously selected level).
3 Press
to accept the displayed value.
4 To toggle the current selection ON/OFF press
(select the DESCRAMBLE menu)
Note: If the optional DS8000 is not fitted, the above
procedure will result in no audio being produced. Not all
decrambler units are designed to work with the AR5000.
Consult with your dealer if you have any doubts regarding
suitability.
(16) Option - CTCSS tone squelch
- CT5000
The optional CT5000 tone squelch unit will enable the
AR5000 to selectively receive only specifically modulated
CTCSS signals or to verify the CTCSS frequency used.
Operation is split into two sections SEARCH (16-3) and
SQUELCH (16-4).
CTCSS tones use very low audio frequencies so cannot
easily be heard, they are designed to fall below the audio
bandwidth of the receiver so do not cause an annoyance
to the recipient. If you want any chance of hearing the
tones, use a large external speaker or headphones and
carefully set the (AF.SET) audio settings... refer to section
6-11 of this manual.
To increase versatility different CTCSS tones may be
programmed into each memory and VFO.
Available CTCSS frequencies are (Hz):
First
Second
Third
group
group
group
67.0 *
69.4 **
71.9 *
74.4 *
77.0 *
79.7 *
82.5 *
85.4 *
88.5 *
91.5 *
94.8
97.4 *
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.9
136.5
141.3
146.2
151.4
156.7
159.8 **
162.2
165.5 **
167.9
171.3 **
173.8
177.3 **
179.9
183.5 **
186.2
189.9 **
192.8
196.6 **
199.5 **
203.5
206.5 **
210.7
218.1
225.7
229.1 **
233.7
241.8
250.3
254.1 **
