QYT KT-780 PLUS User Manual

Do not operate the radio while driving due to safety risks.

Use only 13.8V DC power supply; avoid higher voltages.

Avoid exposure to dust, moisture, water, and direct sunlight.

Keep the radio away from sources of electromagnetic interference.

Turn off power immediately if smoke or strange smell occurs.

Avoid prolonged high-power transmission to prevent overheating.

Check package condition and verify all standard accessories are included.

Detailed description of the radio's front panel controls and indicators.

Details the pin assignments for the accessory connector.

Explains how to use Power/Volume and specific function keys (CALL, MONI, V/M, EXIT/AB, FM).

Enter password to configure frequency range and transmission settings.

Instructions for setting, reading, and writing passwords for software access.

Details indicators for frequency, channel, mode, signal strength, and battery.

Illustrates different transmit power indicator bars for low, medium, and high power.

Explains indicators for signal strength, battery, keypad lock, and transmission status.

Step-by-step process to input and save frequencies to channels.

Instructions for deleting channels and setting band frequencies (A, B, C, D).

Guide for setting up channels with CTCSS/DCS for repeater communication.

Detailed steps for setting CTCSS and DCS frequencies for receive and transmit.

Procedure for programming new channels and deleting existing ones.

How to enter or exit channel mode from frequency mode using the MENU key.

Guide to manually inputting frequencies, saving channels, and deleting them.

Instructions for editing FM radio channels using PC software and searching FM channels.

How to enable or disable the keypad lock-out feature by holding the [#] key.

Procedure to select and transmit transit signals using the CALL key.

Steps for setting PTT ID codes and transmit delay times via manual or software.

Configuration options for DTMF, 2 TONE, and 5 TONE signalling.

Explanation of DTMF encode/decode features and their PC programmability.

How DTMF signalling alerts and enables communication.

How the radio emits self ID code upon receiving a matched patrol code.

Enables monitoring surrounding voice when a matched monitor code is received.

Disables transmitting and alerts when a matched stun code is received.

Disables all radio activities upon receiving a matched remote kill code.

Restores radio functionality when a matched remote revive code is received.

Triggers an emergency alarm when a matched emergency alarm code is received.

Setting DTMF signals and information codes for transmission via the CALL key.

Setting 2 TONE function and pre-code signal groups for transmission.

Configure 5 TONE coding/decode function and input signal information.

Details the function of each button on the optional speaker microphone.

Explains how to use the microphone keypad for various functions like mode switching and scanning.

Configure TMR function for various standby frequency combinations.

Select frequency step figures for use in frequency mode.

Adjust the squelch level from 0 to 9.

Select transmit power output: HIGH, MID, or LOW.

Enable or disable the scrambler function.

Configure the time-out timer for transmissions.

Configure auto power off when no signal or operation.

Select between Wide and Narrow band modes.

Configure backlight behavior: always on or auto off.

Enable or disable alert tones.

Program desired DCS tones for receiving or none.

Program desired CTCSS tones for receiving or none.

Program desired DCS tones for transmitting or none.

Program desired CTCSS tones for transmitting or none.

Configure DTMF tone emission during transmission.

Set delay time before PTT-ID transmit.

Configure signalling code information via PC software.

Configure emergency alarm tone, code, and ANI.

Set emergency alarm from a specified emergency channel.

Configure signalling availability prompt.

Edit the channel name in channel mode.

Select display mode for channels (frequency or name).

Select display mode for channels (frequency or name).

Select display mode for channels (frequency or name).

Select display mode for channels (frequency or name).

Select menu language: English or Chinese.

Enable or disable the keypad auto lockout function.

Set the color for main LCD figures.

Set the background color for the main LCD.

Set the color for menu figures.

Set the background color for the menu.

Set the front color for top figures.

Set the background color for top figures.

Set the color for bottom signal figures.

Set the background color for bottom signals.

Set the color for receiving figures.

Set various colors for display elements.

Set the color for menu characters.

Set the color for transmitting figures.

Configure bottom signal output power or volume display at transmit.

Select a channel (000-199) to store a desired frequency.

Delete channel information; 'CH' indicates programmed frequency.

Configure transmit/receive frequency offset.

Set frequency offset range and TX/RX offset in VFO mode.

Configure ANI code, programmed by PC software.

Set the length of the ANI code.

Send specific frequencies (1000Hz, 1450Hz, 1750Hz, 2100Hz) to activate repeater.

Configure repeater transpond modes for carrier, CTCSS/DCS, tone, or DTMF.

Set delay time for main frequency back in multi standby.

Enable or disable squelch tail elimination function.

Set repeater squelch tail length to eliminate noise.

Select delay time for receiving repeater tail noise.

Set DTMF gain.

Reset menu mode or all settings to factory defaults.

Details frequency range, channel capacity, spacing, voltage, and operating temperature.

Specifications for receiver sensitivity, selectivity, and audio response.

Specifications for transmitter output power, modulation, and audio distortion.