PA G E 2 0 I n s t r u c t I o n m A n uA l
t X 4 5 0 0 s
3. rotate the
channel
control to select ‘A’ in the
flashing digit position. this is the special code
that will create the Group call.
4. Briefly press the
channel
control again to select
the next digit position.
5. continue entering the other 4 digits as required.
the selcall number is now ready to send.
6. Press and hold the
cALL
key. A long beep will
be heard and the radio will transmit the
selcall Ident.
NOTE:
where your radio allows it, programming
group calls for 100 radios is identical except that you
will need to select ‘A’ for the last two digits (e.g.
123AA). For 1000 radios you will need to select ‘A’
for last three digits (e.g. 12AAA).
e.g.
sending Ident 145AA will call 100 radios with Idents
14500 -> 14599
sending Ident 14AAA will call 1000 radios with
Idents 14000 -> 14999
You can also arrange to send selcalls to every tenth
radio by setting the second digit to A.
e.g.
sending Ident 145A5 will call radios 14505, 14515,
14525, 14535, 14545 . . -> 14595
call Acknowledge in group Mode
there is no call acknowledge when sending group
calls. this is to prevent all the radios in your group
from trying to respond to your selcall transmission
at the same time.
Storing group call Idents
Group call Idents can be stored in memory in the
same way as a standard selcall Ident.
Receiving group calls
receiving a Group call is identical to receiving a
normal selcall except that the alarm sound is a low
tone beep instead of the normal high tone beep. the
caller’s Ident or AlPhA label appears on the display
in the usual way.
rECEIVE-ONLy CHANNELS
the tX4500s supports up to 95 user programmable
receive-only channels with frequencies in the range
403 – 520 mhz. Frequencies can be stored in
five separate channel banks labelled A to E, each
containing up to 19 channels. these additional 19
channels are located directly above cB channel 80
(81 – 99).
Each receive-only channel can also be assigned an
Alpha label to help identify that channel when it is
selected.
Frequency programming and channel bank selections
are accessed through the configuration menu.
Selecting channel Banks
Before programming or recalling channels you
should select the required channel bank. the 5
channel banks can be enabled through the menu
either as individual banks of 19 channels (rX-A,
rX-B, rX-c, rX-D or rX-E) or as a combined group
of 95 channels (rXA-E).
the default channel bank is rX-A.
Separate channel Banks
RX-A RX-B
RX-c RX-D
RX-E
R
X
O
N
L
y
c
H
A
N
N
E
L
S
81
81
81
81
81
82
82
82
82
82
83
83
83
83
83
84
84
84
84
84
85
85
85
85
85
86
86
86
86
86
87
87
87
87
87
88
88
88
88
88
89
89
89
89
89
90
90
90
90
90
91
91
91
91
91
92
92
92
92
92
93
93
93
93
93
94
94
94
94
94
95
95
95
95
95
96
96
96
96
96
97
97
97
97
97
98
98
98
98
98
99
99
99
99
99
RX-A
R
X
O
N
L
y
c
H
A
N
N
E
L
S
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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