Kenwood TKR-750 Programming Reference Manual page 33

! The duration configured in the Repeat Hold Time is handled
as the TOT.
! The audio signal is muted while the Repeat Hold Time is
counting down.
" DQT Turn-off Code
It can configure a duration to send a DQT Turn-off
code. This function eliminates the squelch tail noise
on the receiving side by sending the DQT Turn-off
code when the transmitting party stop to transmit.
You can configure it by the spin buttons or directly
enter the value.
Range 140 - 200 ms
In steps of 1 ms
Default 170 ms
Note: When the QT/DQT Encode configured to the channel is
DQT, the DQT Turn-off code is sent.
" QT Decode Delay
It can configure a duration between the time when the
time the received QT signalling un-matches and the
time when the TKR-750/850/751/851 starts the QT
Decode operation. With this function, the QT Reverse
Burst code should not be recognized as a normal QT
signalling. You can configure a time by the spin
buttons or directly enter the value.
Reverse Burst.)
Range Off, 1 - 250 ms
In steps of 1 ms
Default 80 ms
Note: The TKR-750/850/751/851 starts the QT Decode
operation immediately after the received QT signalling
un-matches if the QT Decode Delay is disabled.
" Test Tone
It can configure the frequency of single tone
transmitted when Test Tone assigned to a PF key or
an Auxiliary Input Port is enabled. You can configure
a tone by the spin buttons or directly enter the value to
configure the duration.
Window, 6.10 Function Port Window.)
Range 300 - 3000 Hz
In steps of 1 Hz
Default 1000 Hz
Note: The TKR-750/850/751/851 sends the CW ID/Message
only when sending the CW ID/Message while
transmitting Test Tone. It does not modulate the repeat
audio signal while transmitting Test Tone.
CW ID Window, 6.12 CW Message Window.)
" Squelch Level
It can configure a squelch level used to eliminate the
weak signal. It should decrease to listen to weak radio
Version: 1.01
(Refer to 6.2.12 QT
(Refer to 6.5 Key Assignment
(Refer to 6.3
Field Programming Reference (FPRG)
signals and increase the level for only strong radio
signals communication. You can configure the level by
the spin buttons or directly enter the value.
Range 0 (Shallow) - 15 (Tight)
In steps of 1
Default 1
Note: When using the channel that "Operation Mode" is
configured as "Repeat" and the "QT/DQT Encode" is
configured as "None", the TKR-750/850/751/851
activates the repeat operation regardless of the
presence of the reception signal if the Squelch Level is
configured as "0". (Refer to 6.2.4 QT/DQT Encode, 6.2.8
Operation Mode.)
" QT Reverse Burst Time
It can configure a duration to send the QT Reverse
Burst code. This function eliminates the squelch tail
noise on the receiving side by sending the QT
Reverse Burst code at end of transmitting. You can
configure a duration by the spin buttons or directly
enter the value. (Refer to 6.2.12 QT Reverse Burst.)
Range 140 - 200 ms
In steps of 1 ms
Default 160 ms
Note:
! This function is available only when the QT/DQT Decode
code is enabled in the "Channel Edit" window.
! When the QT/DQT Encode code configured to the channel
is QT, the TKR-750/850/751/851 sends the QT Reverse
Burst Code. When the DQT Encode is selected, the it sends
the QT Turn-off Code.
" Backup Battery System
It can configure a timing to emit the Backup Battery
Warning Tone/Operation Tone. Select "Secondary
Input Backup" or "Main Line Backup" from the
dropdown list. (Refer to 6.4.2 Optional Features 2
Tab.)
Emits the Backup Battery Warning
Secondary
Tone or the Operation Tone when the
Input
power is switched from the main
Backup
power to the backup power.
Range
Emits the Backup Battery Warning
Tone or the Operation Tone when the
Main Line
voltage of the main power becomes
Backup
lower than the Power Supply Lower
Level.
Default Secondary Input Backup
" Power Supply Lower Level
It can configure a reference voltage in order to
activate/deactivate the Power Supply Lower Limit.
This function activates an Auxiliary output port that is
assigned to the Power Supply Lower Limit when the
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