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TK-690H

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25. Busy Channel Lockout (BCL), BCL Override

T h e B u s y C h a n n e l L o c k o u t f u n c t i o n p r e v e n t s

interferance with other stations that may be using the same
channel.

While the selected channel is in use, pressing PTT

causes the RADIO to sound a warning tone, and transmis-
sion is inhibited. To stop the warning tone, release PTT.

If BCL Override has been enabled, pressing PTT within

500msec again will cancel BCL, and transmission is en-
abled.

26. 2TONE Signalling

2Tone signalling opens the squelch only when the RA-

DIO receives a proper 2Tone code that is the same as the
pre-programmed 2Tone for the channel. When the RADIO
receives a 2Tone code, the CALL icon flashes.

If Transpond has been programmed, the RADIO will re-

turn an acknowledgment signal automatically after receiving
the 2Tone code.

If Call Alert has been programmed, an Alert Tone sounds

after receiving a 2Tone code. You can configure “Normal”
(an alert tone beeps once) or “Continuous” (an alert tone
beeps every 5 seconds) for the Call Alert. Unmute condition
is canceled and the CALL icon goes off when ; (1) pressing
the [MON] Key, (2) hanging the microphone on its hook, (3)
muting continues for 10 seconds. (If “Auto Reset” has been
programmed)

27. DTMF Signalling

DTMF Signalling opens the squelch only when the RA-

DIO receives a proper DTMF code that is the same as the
pre-programmed “Primary Code (Individual ; 1~7digits)” or
“Secondary Code (Group ; 1~7digits)”. When the RADIO re-
ceives a correct code, the CALL icon flashes.

If Transpond has been programmed, the RADIO will re-

turn an acknowledgment signal automatically after receiving
the DTMF code.

If Call Alert has been programmed, an Alert Tone sounds

after receiving a DTMF code. You can configure “Normal”
(an alert tone beeps once) or “Continuous” (an alert tone
beeps every 5 seconds) for the Call Alert. Unmute condition
is canceled and the CALL icon goes off when ; (1) pressing
the [MON] Key, (2) hanging the microphone on its hook, (3)
muting continues for 10 seconds (If “Auto Reset” has been
programmed), and (4) receiving reset code. (Primary code +
“#” or secondary code + “#”)

28. Time Out Timer

(Possible to configure to each group)

The Time Out Timer function interrupts continuous trans-

mission after a specified time elapses.

Holding down PTT for longer than the programmed time

causes the RADIO to stop transmitting and sound a warning
tone. To stop the warning tone, release PTT.

29. Signalling AND/OR

(Possible to configure to each group)

The RADIO will be unmuted with a combination of QT/

DQT and 2Tone/DTMF. The AND/OR setting works as fol-
lows.

29-1. AND

The audio is unmuted when the RADIO receives the cor-

rect QT/DQT and 2Tone/DTMF. After transmitting, 2Tone/
DTMF will be canceled.

29-2. OR

The audio is unmuted when the RADIO receives the cor-

rect QT/DQT. 2Tone/DTMF is used just as an individual call
or group call.

30. Off Hook Decode

If the OFF HOOK Decode function has been enabled, re-

moving and replacing the microphone on the HOOK has no
effect for decoding QT/DQT and 2Tone/DTMF.

31. TX Audio Monitor

; Dual Head Configuration only

This function allows the radio operator to hear another

operator’s voice which is transmitted through another con-
trol head.

If the TX Audio Monitor function is set to “w/Talk Inter-

rupt” and one operator is transmitting, the other operator’s
control head displays “INTERCOM” and he/she can speak
to the transmitting control head by pressing PTT.

32. Roll Over/Dead End

32-1. Roll Over

When [

] (CH UP) is pressed, or the CH UP/DOWN Knob

is turned CW from the Maximum channel, the channel
changes to the Minimum channel.

When [

] (CH DOWN) is pressed, or the CH UP/DOWN

Knob is turned CCW from the Minimum channel, the chan-
nel changes to the Maximum channel.

32-2. Dead End

When [

] (GR UP) is pressed, or the GR UP/DOWN Knob

is turned CW from the Maximum group, the group doesn’t
change.