Squelch; Intro Screen; Keypad Lock - Retevis RT72 User Manual

1) Press [MENU] key to enter the main menu.
2) Press [ ] / [ ] key to Settings, then press [MENU] to
select.
3) Press [ ] / [ ] key to Radio settings, then press
[MENU] to select.
4) Press [ ] / [ ] key to Backlight, then press [MENU] to
select.
5) The screen displays "Backlight" and "BLT Time Delay"
options. Press [ ] / [ ] key to select "BLT Time Delay"
and Press [MENU] key to select.
6) The screen shows "Backlight Delay XX(s)", press [
[ ] to select more appropriate delay time (05 to 15
seconds optional), then press [MENU] to confirm backlight
delay setting, and back to the upper menu.
Note: If the backlight is set to time off, if you select 5S to
15S, the screen will turn off the screen backlight after the
corresponding time without any user operation.

1.5 Squelch

You can adjust the squelch level of radios, filters unusable
calls of low signal strength or channels of background noise
that higher than normal value.
Normally it is default value (that is regular filtering); strictly
filter unwanted calls or background noise, in the same time,
calls from remote locations can also be filtered out.
The menu functions as follows:
1) Press [MENU] key to enter the main menu.
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2) Press [
to select.
3) Press [
[MENU] key to select.
4) Press [
to select.
5) Choose "Tight" or "Normal", then press [MENU] key to
select. Press [BACK] key return to the home screen.

1.6 Intro Screen

] / If needed, you can enable and disable the boot screen
display. The menu functions as follows:
1) Press [MENU] key to enter the main menu.
2) Press [
to select.
3) Press [
[MENU] key to select.
4) Press [
key to select.
5) Press [
press [MENU] key to enable the corresponding boot screen.
Note: The radio's boot screen can be set to simple images or
short characters by software.

1.7 Keypad Lock

You can lock the radio keypad to prevent accidental
keystrokes.
] / [ ] key to Settings, then Press [MENU] key
] / [ ] key to Radio Settings, then Press
] / [ ] key to Squelch, then press [MENU] key
] / [ ] key to Settings, then Press [MENU] key
] / [ ] key to Radio Settings, then Press
] / [ ] key to Intro Screen, then press [MENU]
] / [ ] key to select "Char String" or "Picture", then
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