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While in the CTCSS menu, to activate the CTCSS facility (the LCD legend “ON”
is displayed in reverse highlight).
Use the main dial or ï ð keys to make selection of CTCSS tone from the 50 available, the value
cannot be adjusted when the menu is set to “OFF”. The current CTCSS tone is displayed on the
last-but-one line of the LCD, the legend “«” is displayed to the left of the CTCSS frequency when
the current receive frequency is using the displayed CTCSS tone, this assists manual selection of
the correct tone.
To accept the data input , alternatively to
abort entry . The selected CTCSS tone may
be used in VFO (separate CTCSS tones may be held in each
VFO) and independent CTCSS tones saved in each search
bank and memory channel.
While in VFO, the legend “CTC” is displayed in the lower left
corner of the LCD to indicate that CTCSS is active. The audio will
be completely muted until a transmission occurs which contains
the specified CTCSS tone even when the squelch is set fully
anti-clockwise (open), it is normal for the occasional ‘splutter’ to be produced as ‘CTCSS type
fingerprints’ naturally occur in everyday transmissions and background noise.
Scan & search banks: It is even possible to scan & search with the squelch open when CTCSS is
active but scan/search rates will be reduced significantly. To achieve the best speeds, set the
squelch until the “S” legend is extinguished in the usual manner.
Refer to the CTCSS table of available tones:
94.8 100.0 103.5 107.2 110.9
114.8 118.8 123.0 127.3 131.8
136.5 141.3 146.2 151.4 156.7
162.2 167.9 173.8 179.9 186.2
192.8 203.5 210.7 218.1 225.7
233.6 241.8 250.3 67.0 71.9
74.7 77.0 79.7 82.5 85.4
88.5 91.5 97.4 69.4 159.8
165.5 171.3 177.3 183.5 189.9
196.6 199.5 206.5 229.1 254.1
To switch CTCSS off, access the CTCSS menu to highlight the
legend “OFF” then .
18-3-2 CTCSS search
If you are uncertain what CTCSS frequency is in use, but you think there may be one present, you may
Section 18-3-1, 18-3-2
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