Ctcss Operation (Fm Mode) - Kenwood TS-990S Instruction Manual

5 ASSISTING YOUR SMOOTH QSO
4 Press [SCAN] (F7) to scan the tone frequency.
• Until the scan ends, "SCAN" appears on the right of the
tone frequency.
• As soon as the tone frequency is detected, the scan stops
and the frequency appears in the FREQ. [Hz] box.
• The scan starts with a press of [M/S] (F6) while the
transceiver is in reception in the selected band (the "MAIN
BUSY/TX" LED or the "SUB BUSY/TX" LED lights). If the
"MAIN BUSY/TX" LED or "SUB BUSY/TX" LED is unlit,
rotate the SQL control to receive so that the transceiver will
be placed in receive mode.
• Press [M/S] (F6) if you wish to change the current band
(main band or sub band).
• The scan pauses by pressing [SCAN] (F7) while scanning
the tone frequency. The scan resumes by pressing [SCAN]
(F7) again.
• The scan pauses if the receive signal breaks off while
scanning the tone frequency. The scan automatically
restarts when the transceiver detects the receive signal.
5 Press [ESC] to exit.
5-32
CTCSS OPERATION (FM MODE)
The CTCSS stands for Continuous Tone Coded Squelch
System. Add your audio signal with the CTCSS tone
frequency predetermined with the station with which you
wish to have a QSO. When the CTCSS tone frequency in
the receive signal from the other station coincides with the
CTCSS tone frequency of your station, the squelch opens
and you can hear the audio received.
You can select a desired CTCSS tone frequency and the
tone frequency independently, but cannot use the CTCSS
and tone simultaneously.
CTCSS Tone Frequency: The squelch opens when
the transceiver receives the CTCSS tone to which the
same CTCSS tone frequency as that is configured
for the transceiver is superimposed A CTCSS tone
frequency scan makes it possible to detect the CTCSS
tone frequency contained in the receive signal. If the
transceiver receives the signal while the CTCSS tone
frequency scan is in operation, you will hear the audio of
the receive signal regardless of whether the CTCSS tone
frequency coincides or not.
Cross tone: The squelch opens when the CTCSS tone
frequency matches during the reception and the tone is
transmitted at the configured tone frequency at the time
of signal transmission. Different tone can be used for
transmission and reception.
Note:
◆ The squelch opens and you can hear the audio received only if
the CTCSS tone frequency in the receive signal coincides with
the CTCSS tone frequency configured in the transceiver. Use this
function to single out the receive signal from the other station so
that unnecessary signals will not be received. Therefore, the use
of the CTCSS frequency does not prevent the contents of your call
from being monitored by other stations.
◆ You do not need to configure the tone frequency if you store the
configuration for CTCSS tone frequency in a memory channel and
retrieve the frequency and operating information from the memory
channel. For memory channel configuration, refer to "MEMORY
CHANNEL". {page 10-1} If you use this transceiver as the amateur
radio base station of the VoIP, you can configure the received audio
to sound from the speaker even if the CTCSS tone frequency does
not match. {page 16-23}
◆ To use a CTCSS tone, the RX Monitor must be assigned to
a PF key allowing you to monitor the status of the transmit
frequency. {page 16-6}
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