Press [MENU] to enter the function. Press the / keys to enable (ON) the function, then press [MENU] key for confirmation.
To return to the standby mode press [EXIT] key.
Using the stopwatch timer:
When this function is ON, press [MENU] key to start counting; Press [MENU] key again to re-start counting.
To exit the function, stop the counting first, and then press the [EXIT] key.
6.8 DTMF
DTMF is an in-band signaling method using dual sinusoidal signals for any given code. Originally developed for telephony systems, it has proved
a very versatile tool in many other areas.
In two-way radio systems, DTMF is most commonly used for automation systems and remote control. A common example would be in amateur
radio repeaters where some repeaters are activated by sending out a DTMF sequence (usually a simple single-digit sequence).
DTMF frequencies and corresponding codes
1209Hz 1336Hz 1477Hz 1633Hz
697Hz 1 2 3 A
770Hz 4 5 6 B
852Hz 7 8 9 C
941Hz * 0 # D
The radios has a full implementation of DTMF, including the A, B, C and D codes.
The numerical keys, as well as the
, and , keys correspond to the matching DTMF codes as you would expect. The A, B, C and D codes
are located in the [MENU],
, and [EXIT] keys respectively.
To send DTMF codes, press the key(s) corresponding to the message you want to send while holding down the PTT key.
If you have the keypad lock enabled on your radio, you can still send DTMF tones the regular way without having to unlock your radio.
6.9 Customization
The radio allows you to define visual and audible features such as Display Illumination Time, MR/Channel Mode Display Format, Power On
Message, Power On password, Keypad Beep, Roger Beep, Voice Prompt, etc. to suit your usage habits.
6.9.1 Display backlight (ABR) - MENU 51
In standby mode, press [MENU] + 5 1. The screen will display āABR ā.
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