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CT690 user’s manual
Note: the higher is the level, the higher is the microphone sensitivity. The VOX
function cannot be enabled in SCAN and FM radio mode.
Wide/Narrow bandwidth (W/N) - MENU No.5
This function is used to set the working bandwidth of the radio.
you can choose between wide or narrow bandwidth.
WIDE: 25KHz
，
NARROW
：
12.5 KHz
Note: the radio normally uses the wide band. In channel mode, this function can-
not be used.
Backlight (ABR) - MENU No. 6
With this function you can adjust the auto off time of the display backlight
(1-5s).
Note: we suggest you setting 4-5s levels.
Dual Watch Operation (TDR) - MENU No. 7
When this function is activated, you can receive the frequency of channel A
and channel B at the same time.
If a signal is detected,
▲
will blink on the corresponding channel or frequency.
Note: In Dual Watch operation mode, you can change the parameter of AB chan-
nel or frequency freely.
Keypad beep (BEEP) - MENU No. 8
When this function is enabled, everytime a button is pressed, you will hear a
beep tone.
Time-Out-Timer (TOT) - MENU No.9
The TOT function is used to prevent a too long transmission and limits the tx
time: TOT temporarily stops the transmssion if the radio has been used beyond
the max pre-set time (for example 15s, 30s, 45s, etc).
Receiving DCS (R-DCS) - MENU No.10
DCS codes are similar to access codes and can be added to channels, so as
to create a sort of personal channel. They enable the radio to communicate
with the users that are tuned on the same channel and have set the same DCS
code.
Summary of Contents for CT690
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