Ctcss Operation; Selecting Ctcss; Configuring The Ctcss Frequency; Ctcss Frequency Scan - Kenwood TS-890S Instruction Manual

5 COMMUNICATING AIDS

CTCSS Operation

CTCSS is the abbreviation for Continuous Tone Coded Squelch
System. It is used to add a CTCSS tone frequency that is
determined in advance with the target station to the audio signal
to be transmitted. When the CTCSS tone frequency contained in
the RX signal received from the target station coincides with the
CTCSS tone frequency of one's own station, the squelch opens
and the RX audio can be heard.
• A different value can be selected for CTCSS tone frequency and
tone frequency, but CTCSS and tone cannot be used
concurrently.
• CTCSS tone frequency: Squelch opens upon receiving a
CTCSS tone for which the FM wave is superimposed with the
same CTCSS tone frequency as that configured on this
transceiver.
• During CTCSS frequency scan, it is possible to detect the
CTCSS tone frequency that is contained in the RX signal.
• When a signal is received while CTCSS tone frequency scan is
in progress, the RX audio can be heard even when the CTCSS
tone frequency does not coincide with that configured on this
transceiver.

Selecting CTCSS

Press F4 [TONE] to select "CTCSS (CT)".
Pressing F4 [TONE] each time toggles the tone signal selection
in the following sequence: "TONE" → "CTCSS (CT)" →
"CROSS" → Blank (deselected).
.

Configuring the CTCSS Frequency

1 Press and hold F4 [TONE] while "CTCSS" is
selected to display the FM Tone Frequency screen.
.
2 Press F4 [–]/ F5 [+] or turn the [MULTI/CH] control
to select the CTCSS frequency.
CTCSS Frequency (Hz)
67.0 88.5 114.8
69.3 91.5 118.8
71.9 94.8 123.0
74.4 97.4 127.3
77.0 100.0 131.8
79.7 103.5 136.5
82.5 107.2 141.3
85.4 110.9 146.2
• The default setting is "88.5 Hz".
• To restore the default setting, press and hold F1
[(RESET)].
3 Press [ESC] to end the process.
5-30
151.4 177.3 203.5 250.3
156.7 179.9 206.5 254.1
159.8 183.5 210.7
162.2 186.2 218.1
165.5 189.9 225.7
167.9 192.8 229.1
171.3 196.6 233.6
173.8 199.5 241.8

CTCSS Frequency Scan

CTCSS frequency that is contained in signals received in the FM
mode can be searched and displayed with the following steps. This
is useful when there is a need to know the CTCSS frequency of
the mobile station.
1 Press and hold F4 [TONE] while "CTCSS" is
selected to display the CTCSS Frequency screen.
2 Press F7 [SCAN] to start tone frequency scan.
• Scanning stops when a CTCSS frequency is detected, and
the frequency is displayed in the "FREQ. [Hz]" field.
• Pressing F7 [SCAN] while CTCSS frequency scan is in
progress stops the scan operation. Pressing F7 [SCAN]
again resume scanning.
• The scan operation stops when the RX signal is interrupted
during CTCSS frequency scan. Scanning resumes when a
RX signal is detected by this transceiver.
3 Press [ESC] to end the process.

Cross Tone

Make use of cross tone for communication with a repeater that
requires a different tone for transmission to the repeater (uplink)
and reception from the repeater (downlink).
• Cross Tone frequency uses the tone frequency during
transmission and the CTCSS frequency during reception.
• The tone squelch operates using the CTCSS frequency during
reception, while the preconfigured tone frequency is used to
transmit a tone during transmission.

Selecting Cross Tone

Press F4 [TONE] to select "CROSS".
Pressing F4 [TONE] each time toggles the tone signal selection
in the following sequence: "TONE" → "CTCSS (CT)" →
"CROSS" → Blank (deselected).
.

Configuring the TX/RX Tones

1 Press and hold F4 [TONE] while "CROSS" is
selected to display the FM Cross Tone Frequency
screen.
.
2 Press F2 [
]/ F3 [
"CTCSS (RX)".
3 Press F4 [–] / F5 [+] or turn the [MULTI/CH] control
to select the tone frequency or CTCSS frequency.
• To restore the default setting of the selected row, press and
hold F1 [(RESET)].
4 Press [ESC] to end the process.
] to select "TONE (TX)" or