16 | CT590S user’s manual
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: In channel mode, this function cannot be modified.
Backlight (ABR) - MENU No. 6
With this function you can adjust the auto o 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 fre-
quency.
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.
You can choose amongst:
OFF: OFF
R-DCS: D023N-D754N (Normal DCS)
R-DCS: D023I-D754I (Inverse DCS)
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