HYT TC-780M Manual page 60

Battery Save
When enabled, the Battery Save feature is automatically enabled once the situation, in which no activity is on the channel or
no operation is performed, lasts for 12 seconds.
Pressing any key or receiving a signal will cause the radio to exit Battery Save.
Low Battery Alert
For extra convenience, the red LED flashes and the radio sounds three beeps within 30 seconds, to remind the user to
recharge the battery if the battery level runs low.
CTCSS/CDCSS
If CTCSS/CDCSS is set on the current channel, causes a CTCSS/CDCSS match to be required on an incoming signal for
the radio to unmute. Radios set with the same CTCSS/CDCSS, or not set with CTCSS/CDCSS, can hear from you.
Your dealer may program the current channel with CTCSS/CDCSS, to prevent unwanted conversations on the same
frequency.
The radio will not unmute to an incoming call with invalid CTCSS/CDCSS. This feature does not mean that your
conversation will not be heard by others.
DTMF
The DTMF signalling can be enabled/disabled by your dealer. If DTMF signalling is set on the current channel, press the key
programmed as Call 1/Call 2 to transmit DTMF code.
Direct Call
In receive mode, the input DTMF number (16 digits at maximum) scrolls on the LCD. Press the PTT key to transmit. The
radio sounds a corresponding DTMF tone and returns to the current channel.

When encoding, LED glows red; after encoding, red LED goes out.

When decoding, LED glows green; after successful decoding, LED flashes orange until the valid time expires.
Note: If a wrong digit is entered or you do not want to dial the number, press
C
to delete and exit.
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