VX-450 S
erieS
O
perating
M
anual
19
r
If CTCSS or Digital Coded Squelch (DCS) Lock-
out has been programmed on a channel, the radio
can transmit only when there is no carrier being
received or when the carrier being received in-
cludes the correct CTCSS tone or DCS code.
Automatic Time-Out Timer
If the selected channel has been programmed for au-
tomatic time-out, you must limit the length of each
transmission. While transmitting, a beep will sound
10 seconds before time-out. Another beep will sound
just before the deadline; the top panel’s red LED (“
TX
”
indicator) will disappear and transmission will cease
soon thereafter. To resume transmitting, you must re-
lease the
PTT
switch and wait for the “penalty timer”
to expire.
a
dVanced
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peratIon
Programmable Key Functions
All versions of the
VX-450
include the
TOP SEL
,
SIDE-1
, and
SIDE-2
key. The
VX-454
and
VX-459
include the [
A
], [
B
], [
C
], and [
D
] function keys. Fur-
thermore, the
VX-459
includes the [
] and [
#
] func-
tion keys.
The Programmable key functions can be customized,
via programming by your Vertex Standard dealer, to
meet your communications/network requirements.
Some features may require the purchase and instal-
lation of optional internal accessories. The possible
Programmable key programming features are il-
lustrated on the next page, and their functions are
explained beginning after page 22 For further details,
contact your Vertex Standard dealer.
For future reference, check the box next to each func-
tion that has been assigned to the Programmable key
on your particular radio, and keep it handy.
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peratIon
