Radioddity GC-5 Series - Page 29

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2. Enter 7 on the numeric keypad to get to Dual Watch.
3. Press
key to select.
4. Use the / keys to enable or disable.
5. Press the
key to confirm.
6. Press the
key to exit the menu.
6.7 Stopwatch timer
In standby mode, press + 44. The screen displays “STOP WATCH”.
Press
to enter the function. Press the / keys to enable (ON) the function, then press key
for confirmation.
To return to the standby mode press
key.
Using the stopwatch timer:
When this function is ON, press
key to start counting; Press key again to re-start counting.
To exit the function, stop the counting first, and then press the
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 have a full implementation of DTMF, including the A, B, C and D codes.