Selecting ctcss frequencies, Using ctcss, Штшиои$ tone сош squelch system (ctcss) – Kenwood TM-255E User Manual
Page 47
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ШТШиои$ TONE СОШ SQUELCH SYSTEM (CTCSS)
The CTCSS feature is available only when the TSU-8
CTCSS unit is installed. Also, CTCSS can only be
activated when using FM mode.
CTCSS functions by using subaudible tones that are
superimposed by a transmitter on a transmitted signal
to control a receiver's squelch. When used in
combination with the noise squelch, CTCSS provides
a simple method to selectively choose which stations
will be heard. This transceiver offers a total of 38
standardized CTCSS frequencies.
Monitoring is less tiring when using CTCSS since you
hear only those stations on a particular frequency that
are transmitting the CTCSS tone that you have
selected.
SELECTING CTCSS FREQUENCIES
The CTCSS frequency is selected via Menu B, No.53
{page 14}. The available frequencies are listed below;
Mo.
Freq.
(Hz)
Mo.
Freq,
^ m
No.
Freq.
(Hz)
No.
Freq.
(Hz)
01
67.0
11
97.4
21
136.5
31
192.8
02
71.9
12
100.0
22
141.3
32
203.5
03
74.4
13
103.5
23
146.2
33
210.7
04
77.0
14
107.2
24
151.4
34
218.1
05
79.7
15
110.9
25
156.7
35
225.7
06
82.5
16
114.8
26
162.2
36
233.6
07
85.4
17
118.8
27
167.9
37
241.8
08
88.5
18
123.0
28
173.8
38
250.3
09
91.5
19
127.3
29
179.9
10
94.8
20
131.8
30
186.2
Note: The frequency selected via Menu B, No. 53 for CTCSS
operation is also used for Tone access of repeaters. After using
CTCSS, remember to select the correct Tone frequency before
trying to access a repeater that requires a subaudible tone. Saving
the correct Tone frequency along with the repeater frequency pair
in a memory channel for each repeater you use will take care of this
situation.
USING CTCSS
To switch ON CTCSS, repeatedly press [TONE] until
both "TONE" and "CTCSS" appear on the Display.
Each press of [TONE] switches the transceiver as
follows:
No indicator-^ Tone ON
Tone ON /CTCSS ON
i
("TONE")
("TONE" & "CTCSS")
_______________________f
The CTCSS indicator does not appear if the CTCSS
unit is not installed.
Note:
♦
When using DTSS or Page with CTCSS. the squelch opens
only if the correct CTCSS tone is received and the received
DTSS or Page code matches the code stored in your
transceiver.
♦
If CTCSS and Tone Alert are ON, there is no speaker output
except the aiarm tone even if a signal is received with the
correct CTCSS frequency.
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