AnyTone AT-778UV Instruction Manual

1. Functions & Features

The AT-778UV Mobile Radio features a robust and stable design with advanced, reliable functions, making it a valuable tool for amateur radio enthusiasts. It is specifically designed for drivers, embodying a philosophy of innovation and practicality. Key features include:

• Superior quality materials, advanced technology, and high-quality radiators for stable and durable operation.
• 180-degree rotatable FTF LCD display.
• Full alloy body for effective heat radiation.
• Loud speaker integrated into both the microphone and radio base.
• Amateur and professional modes to suit different operational requirements.
• Reasonably distributed buttons for convenient operation.
• Separate bandwidth settings for each channel: Wide 25K, Middle 20K, Narrow 12.5K.
• 200 programmable memory channels, identifiable by editing names.
• Separate CTCSS/DCS settings for each channel to reject unwanted calls.
• Various scan functions, including CTCSS/DCS Scan.
• Smart menu control and PC programming capabilities.
• Voltage level protection.
• Adjustable LCD brightness.
• Automatic power-on function.
• Main unit and microphone key lock function.
• Optional accessories: wireless microphone, APP control function, scrambler function, DTMF, 2Tone, 5Tone function.

2. Accessories

2.1 Standard Accessories

The following items are included as standard accessories:

• Transceiver: The main radio unit.
• Microphone: For voice input and control.
• Mobile Bracket: For mounting the transceiver in a vehicle.
• Screws: For securing the bracket.
• Pads: Likely for vibration dampening or mounting.
• Adjusting screws: For fine-tuning the bracket or unit.
• DC Power Cable with Fuse Holder: For connecting to a power source.
• Non-slip mat: For stability.
• Fuse (10A 250V): For power protection.

2.2 Optional Accessories

The following accessories are available separately:

• PC cable (PC51): For programming the radio via a computer.
• External Speaker: For enhanced audio output.
• Regulated Power Supply: For fixed station operation.
• Programming Software: To configure radio settings.
• Car Antenna: For mobile communication.

3. Initial Installation

3.1 Mobile Installation

To install the transceiver in a vehicle, select a safe and convenient location that minimizes risk to passengers and the driver during motion. Ensure the unit is positioned so it won't be struck by knees or legs during sudden braking. A well-ventilated location shielded from direct sunlight is recommended.

1. Install the mounting bracket using the provided self-tapping screws (2) and flat washers (2). The bracket attaches to the vehicle's structure, typically near the dashboard or console.
2. Position the transceiver onto the bracket and secure it with the supplied hexagon SEMS screws. Verify all screws are tightened to prevent vibration-induced loosening.

3.2 DC Power Cable Connection

Locate the power input connector and ensure it is as close to the transceiver as possible.

3.2.1 Mobile Operation

The vehicle battery must be rated at 12V. Do not connect to a 24V battery. Use a 12V battery with sufficient current capacity. Insufficient current can cause the display to dim during transmission or reduce transmitting output power.

Power Cable Routing: Route the DC power cable directly to the vehicle's battery terminals using the shortest path. Avoid using the cigarette lighter socket due to potential voltage drops. The cable should be routed to isolate it from heat, moisture, and the vehicle's high-voltage ignition system.

Securing the Cable: Use heat-resistant tape to secure the cable along its length, especially near the fuse box, to prevent damage.

Short Circuit Prevention: When connecting to the battery, disconnect the negative (-) terminal first, then connect the radio's cable. Confirm correct polarity: red wire to the positive (+) terminal, black wire to the negative (-) terminal. Use the entire length of the cable without cutting excess, and do not remove fuse holders.

Final Connection: Reconnect any wiring removed from the negative terminal. Connect the DC power cable to the transceiver's power supply connector, ensuring a firm click.

3.2.2 Fixed Station Operation

For fixed station use, a separate 13.8V DC power supply is required (not included). The recommended power supply should have a current capacity of 12A. Contact your local dealer for compatible power supplies like the QRP-01.

Power Supply Connection: Connect the DC power cable to the regulated DC power supply, ensuring correct polarity (Red to positive, Black to negative). Do not connect the transceiver directly to an AC outlet. Use the supplied DC power cable and avoid substituting cables with smaller gauge wires.

3.2.3 Replacing Fuses

If a fuse blows, identify and resolve the cause before replacing it. If fuses continue to blow, disconnect the power cable and contact an authorized AnyTone dealer or service center. Only use fuses of the specified type and rating to prevent damage to the transceiver.

Battery Discharge Warning: Avoid prolonged use of the transceiver when the vehicle battery is not fully charged or the engine is off, as this can discharge the battery and prevent the vehicle from starting.

3.3 Antenna Connection

For optimal performance, install an efficient and well-tuned antenna. The success of the installation depends on the antenna type and its correct setup. Use a 50Ω impedance antenna with a low-loss coaxial feed-line matching the transceiver's input impedance. Using feed-lines with different impedance can reduce efficiency and cause interference.

Important Note: Transmitting without a connected antenna or matched load can damage the transceiver. Always connect the antenna before transmitting. For fixed stations, a lightning arrester is recommended to mitigate risks of fire, electric shock, and transceiver damage.

Diagram: Shows typical locations for antenna mounting on a car.

3.4 Accessories Connections

3.4.1 External Speaker

If using an external speaker, select one with an 8Ω impedance. The external speaker jack accepts a 3.5mm (1/8") mono (2-conductor) plug.

Connection Note: External speakers often use a double port BTL connection. Ensure correct wiring. Connecting the speaker to ground will cause it to fault. Diagram: Illustrates correct and incorrect external speaker connections, highlighting the error of grounding.

3.4.2 Microphone

For voice communication, connect the microphone, equipped with an 8-pin modular plug, into the front modular socket. Press the plug firmly until the locking tab clicks.

Diagram: Shows the microphone connection port on the front of the transceiver.

4. Getting Acquainted

4.1 Front Panel

The front panel of the AT-778UV includes various controls and indicators:

• Power On/Off/Mute Button: Short press to power on or set auto-power on; hold for over 2 seconds to power off.
• P1-P6 Buttons: Programmable keys for self-defined functions.
• FUNC Button: Accesses function groups and menus.
• MIC Jack: For connecting the microphone.
• LCD Display: Shows channel, frequency, and function settings.
• Channel Switch/Push Button/Key Lock: Used for channel selection and other functions.

Diagram: Labeled diagram of the front panel with numbered controls corresponding to the key functions listed.

4.2 Rear Panel

The rear panel features connection ports:

• ANT Connector: For connecting a 50 ohm antenna.
• EXT SP Connector: For connecting an optional external speaker (SP-01).
• Power Cable Connector: For connecting the DC power cable.

Diagram: Labeled diagram of the rear panel with numbered ports.

4.3 Display

The LCD display provides detailed information:

• P1-P6 Indicators: Show the self-defined functions assigned to these keys.
• TX/RX Status: Indicates transmission or reception.
• Automatic Power On Indicator: Shows if the AOP function is active.
• Field Strength Indicator: Displays signal strength.
• Channel Number: Shows the current channel in channel mode.
• Bandwidth Indicator: Displays the set bandwidth for the main channel.
• CTCSS/DCS Indicator: Shows if CTCSS/DCS is set for the main channel.
• Reverse Function Indicator: Indicates if the reverse function is active.
• Offset Function Indicator: Shows if the offset function is active.
• Scan List Indicator: Denotes if the channel is in the scan list.
• Main Channel Frequency/Name: Displays the frequency or name of the main channel.
• Sub Channel Number: Shows the sub channel number in dual watch mode.
• Sub Channel Bandwidth: Displays the bandwidth for the sub channel.
• Sub Channel CTCSS/DCS: Shows CTCSS/DCS settings for the sub channel.
• Sub Channel Reverse/Offset Indicators: Indicate reverse and offset functions for the sub channel.
• Signal Received Indicator: Shows when a signal is received on the sub channel.
• Sub Channel Frequency/Name: Displays the frequency or name of the sub channel.
• Signal Strength: Displays received signal strength.
• Voltage and Menu Setting: Shows battery voltage and current menu settings.

Diagram: Detailed view of the LCD display with numbered indicators corresponding to the functions listed.

4.4 Microphone

The microphone includes:

• UP/DOWN Buttons: Increase/decrease frequency, channel number, or setting value.
• PTT (Push-To-Talk) Button: Initiates transmission.
• Number Keys (0-9, *, #): Used for inputting frequencies, DTMF codes, and menu selections.
• A/B Band Button: Selects the left (A) or right (B) band as the main band.
• Band Indicator Light: Illuminates for the main band.
• TX/RX Indicator Light: Green for receiving, red for transmitting.
• MIC Element: For speaking into the microphone.
• Speaker: Allows hearing calls when the main unit speaker is muted or disabled.
• Lock UP/DOWN Button: Locks or unlocks the UP/DOWN buttons.

Diagram: Shows the microphone layout with numbered buttons.

MIC Connector Diagram: Details the pinout of the 8-pin microphone connector, including +5V, DOWN, UP, MIC GND, MIC, PTT, and GND connections.

5. Working Mode

The AT-778UV can operate in two primary modes: Amateur Transceiver mode or Professional Transceiver mode. The radio offers two levels of operation menus for function settings, making it user-friendly.

Menu Navigation: FUNC MENU is for background functions, CHAN MENU for channel functions, and MINI KEY menu for self-defined keys.

1. Working Mode Selection

Via Programming Software: In the PC software's "General Setting" menu, select "Display Mode" to choose between Amateur Transceiver mode or Professional Transceiver mode.

Via Manual Setup: Refer to the "Display Mode" section on Page 16.

2. Amateur Transceiver Mode

This mode is active unless the radio is set to "CH" (Channel) mode. Users can switch between Channel mode and VFO mode by pressing the V/M key.

• Frequency+Channel Mode (FR): Displays frequency and channel. New channel operations and shortcut settings are temporary and revert to initial settings upon power off or channel change.
• Channel+Name Tag Mode (NM): Displays the channel name if assigned, otherwise frequency and channel. Operations are similar to Frequency+Channel mode.
• VFO Mode (Frequency Mode): Displays only the frequency. Shortcut operations and channel settings are permanently stored. Settings remain until changed again.

Diagrams: Illustrate the display for Frequency+Channel, Channel+Name Tag, and VFO modes.

3. Professional Transceiver Mode

This mode is activated when the display mode is set to "CH". In this mode, most shortcut operations are disabled except for scanning. Menu items 1-10 in function settings are hidden and must be configured via PC software. The display shows the current channel name if available, otherwise the channel number.

Diagram: Illustrates the display for Professional Transceiver mode showing channel numbers.

Note: If the transceiver is programmed and locked in Professional Transceiver mode, manual switching back to Amateur Transceiver mode via general settings is not possible.

The FUNC MENU settings can be changed and saved in any mode.

6. Basic Operations

6.1 Switching the Power On/Off

Short press the power button to turn the radio on or activate automatic power-on (if configured in the menu). Hold the power button for over 2 seconds to turn the radio off.

6.2 Adjusting the Volume

1. Short press the PX key (if programmed as VOL control). The LCD will display "VOL:XX". Turn the channel switch to adjust the volume level.
2. During reception, a short press of the volume control mutes the speaker, displaying "AUDIO:MT". Pressing again restores the previous volume level.

Note: Volume adjustment can be more precise during communication.

6.3 Adjusting Frequency

1. Using the Channel Knob (VFO Mode): Turn the channel knob to adjust frequency. Push the knob to flash a matching character, then turn to adjust frequency in steps of 1K, 10K, 100K, 1MHz, or 10MHz.
2. Using UP/DOWN Keys (Microphone): The microphone's UP/DOWN keys can also adjust frequency, one step at a time. Holding the key allows for faster adjustment. If the channel knob is set to VOL function, press the PX key (programmed as FRQ) to enable frequency adjustment via the knob.
3. Direct Input (VFO Mode): Use the microphone's number keys to input a desired frequency (e.g., 145.125MHz by pressing 1, 4, 5, 1, 2, 5). Invalid inputs outside the radio's range will be rejected.

Note: Available frequency step sizes include 2.5k, 5k, 6.25k, 10k, 12.5k, 20k, 25k, 30k, and 50k.

6.4 Adjust Channel

1. Using the Channel Switch: In channel mode, turn the channel knob or use the microphone's [UP]/[DOWN] keys to select the main channel.
2. Note: If an empty channel is encountered, the radio will skip to the next available channel. If the channel knob is programmed as VOL, press the PX key (programmed as CH) to enable channel selection via the knob.
3. Direct Input (Channel Mode): Use the microphone's number keys to input a channel number (001-200). For example, 001 corresponds to channel 1. If an empty channel is entered, an error will be reported, and the radio will return to the previous channel.

6.5 Receiving

When a call is received on the current channel, the screen displays "RX" and field strength. If the "RX" icon and field strength flash but no audio is heard, it may indicate a matching carrier but unmatching signaling. Refer to CTCSS/DCS CODE or Optional Signaling setup (Page 14).

6.6 Transmitting

Hold the [PTT] button and speak into the microphone, holding it approximately 2.5-5.0cm from your lips. Speak in your normal voice for optimal sound quality. Transmission is only available on the main channel.

6.7 Switch between Main Channel and Sub Channel

The radio supports single-channel dual watch. In standby, the upper display shows the main channel frequency, and the lower display shows the sub channel frequency. Transmission is only possible on the main channel.

1. Short press [FUNC] to switch function groups, then select the [PX] key defined as A/B function.
2. Short press the [PX] key (A/B function) again, or turn the channel knob, to switch between main and sub channels. The LCD will display "Main:XX".
3. Hold [PUSH] or [FUNC] to save and exit, or wait 10 seconds for automatic saving and exit.

6.8 Switch between VFO and Channel Mode

1. Short press [FUNC] to switch function groups, then select the [PX] key defined as V/M function.
2. Short press the [PX] key (V/M function) again, or turn the channel knob, to switch between VFO and Channel modes. The LCD will display "V/M:XX".
3. Hold [PUSH] or [FUNC] to save and exit, or wait 10 seconds for automatic saving and exit.

6.9 Channel Edit

1. In VFO mode, use the channel knob or microphone [UP]/[DOWN] keys to adjust the frequency.
2. Short press [FUNC] to switch function groups, select the [PX] key defined as CDT function. Short press the [PX] key to set CTCSS/DCS code. Use the channel knob or microphone [UP]/[DOWN] keys to select the desired CTCSS/DCS code.
3. Long press [FUNC] to enter the channel setting menu and choose desired settings.
4. Short press [FUNC] to switch function groups, then hold the [PX] key (V/M function) until the channel number flashes. A red channel number indicates it's valid; green indicates it's empty.
5. Use the channel knob or microphone [UP]/[DOWN] keys to select the channel number to store the settings.
6. Hold the [PX] key (V/M function) to stop flashing and store the channel. A beep confirms successful storage.

7. Function Menu

To access the Function Menu:

1. Hold the [FUNC] key for over 2 seconds to enter the SELECT MENU interface.
2. Use [P4], [P6], or the channel knob to navigate the menu list. Press [P5] to turn pages quickly.
3. Press [PUSH] to enter the FUNC MENU list.
4. Use [P4], [P6], or the channel knob to select the desired setting.

7.1 Beep

1. In the FUNCTION MENU list, select function No.01.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting (Off to 5; 6 groups available. 'Off' disables the beep function).
4. Press [PUSH] or [P3] to save and exit.

7.2 Frequency Step Size Setup

1. In the FUNCTION MENU list, select function No.02.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to select the desired step size. 9 step sizes are available: 2.5K, 5K, 6.25K, 10K, 12.5K, 20K, 25K, 30K, and 50K.
4. Press [PUSH] or [P3] to save and exit.

7.3 Display Mode Setup

This radio supports 3 display modes: Frequency+Channel, Channel, and Channel+Name Tag.

1. In the FUNCTION MENU list, select function No.03.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• FR: Frequency+Channel mode.
• CH: Channel mode.
• NM: Channel+Name Tag mode (Amateur transceiver mode). If a channel is not named, it displays Frequency + Channel mode.
4. Press [PUSH] or [P3] to save and exit.

7.4 Squelch Level Setup

This function adjusts the RX signal strength threshold. The radio will only output audio when the incoming signal meets the set level; otherwise, it remains muted.

1. In the FUNCTION MENU list, select function No.04.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired level (Off-9; 10 levels total. 'Off' is the lowest level, disabling squelch).
4. Press [PUSH] or [P3] to save and exit.

7.5 VOL Volume Level Setting

1. In the FUNCTION MENU list, select function No.05.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting (1-36 levels available).
4. Press [PUSH] or [P3] to save and exit.

7.6 PWD Password Setting

1. In the FUNCTION MENU list, select function No.06.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enables password protection.
• OFF: Disables password protection.
4. Press [PUSH] or [P3] to save and exit.

7.7 Scan Dwell Time Setup

1. In the FUNCTION MENU list, select function No.07.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• TO: Pause for a preset time when a matching signal is found, then resume scanning.
• CO: Pause when a matching signal is found and resume scanning when the signal disappears.
• SE: Stop scanning once a matching signal is found.
4. Press [PUSH] or [P3] to save and exit.

7.8 Scan Pause Time Setup

1. In the FUNCTION MENU list, select function No.08.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired pause time:
• 5S: Pause for 5 seconds.
• 10S: Pause for 10 seconds.
• 15S: Pause for 15 seconds.
4. Press [PUSH] or [P3] to save and exit.

7.9 AOP (Automatic Power On Setup)

When AOP is activated, the radio will automatically power on when the car's ignition is turned on.

1. In the FUNCTION MENU list, select function No.09.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enable AOP function.
• OFF: Disable AOP function.
4. Press [PUSH] or [P3] to save and exit.

7.10 RDW (Dual Watch Setup)

1. In the FUNCTION MENU list, select function No.10.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enable Dual Watch function.
• OFF: Disable Dual Watch function.
4. Press [PUSH] or [P3] to save and exit.

7.11 DIM (Backlight Brightness Setup)

1. In the FUNCTION MENU list, select function No.11.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to select the brightness level (1, 2, or 3).
4. Press [PUSH] or [P3] to save and exit.

7.12 TOT (Time Out Timer)

The Time Out Timer limits continuous transmission. If the transmission exceeds the programmed value, it will stop and emit a prompt.

1. In the FUNCTION MENU list, select function No.12.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• 1-30: 1 to 30 minutes, adjustable by 1-minute increments.
• OFF: Disable the TOT function.
4. Press [PUSH] or [P3] to save and exit.

7.13 APO (Automatic Power OFF)

Once APO is activated, the transceiver will automatically switch off after the preset timer expires.

1. In the FUNCTION MENU list, select function No.13.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• 30Min: Automatic power off after 30 minutes.
• 60Min: Automatic power off after 60 minutes.
• 120Min: Automatic power off after 120 minutes.
• OFF: Disable the automatic power-off function.
4. Press [PUSH] or [P3] to save and exit.

7.14 Pilot Frequency

This function is used to activate repeaters. It requires a specific Pilot Frequency to start a dormant repeater. Typically, the pilot frequency does not need to be sent again once the repeater is active.

1. In the FUNCTION MENU list, select function No.14.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired pilot frequency:
• 1000Hz
• 1450Hz
• 1750Hz
• 2100Hz
4. Press [PUSH] or [P3] to save and exit.

7.15 DIR (LCD Display Direction Setup)

1. In the FUNCTION MENU list, select function No.15.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• FAIL: Reverse display orientation.
• STAN: Normal display orientation.
4. Press [PUSH] or [P3] to save and exit.

7.16 Microphone Speaker

1. In the FUNCTION MENU list, select function No.16.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• M H: Turn on both the main speaker and the microphone speaker.
• MAIN: Turn on only the main speaker.
• HAND: Turn on only the microphone speaker.
4. Press [PUSH] or [P3] to save and exit.

7.17 RTDF (RX/TX Dissimilar Frequency Setup)

This feature allows for dissimilar frequencies for receiving (RX) and transmitting (TX). When active, the upper LCD frequency is RX, and the lower is TX. RX frequency can be adjusted using microphone numeric keys, and TX frequency using the A/B key or the PX key defined as A/B.

1. In the FUNCTION MENU list, select function No.17.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enable RTDF function.
• OFF: Disable RTDF function.
4. Press [PUSH] or [P3] to save and exit.

7.18 Reset Factory Default

If the radio malfunctions, resetting the microprocessor may resolve the issue.

1. In the FUNCTION MENU list, select function No.18.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired reset type:
• FACT: Resets all channel and signaling function settings to factory defaults.
• SETUP: Resets function menu settings from No.10 to No.18 to factory defaults.
4. Press [PUSH] or [P3] to save and exit.

8. Channel Menu

To access the Channel Menu:

1. Hold the [FUNC] key for over 2 seconds to enter the SELECT MENU interface.
2. Use [P4], [P6], or the channel knob to navigate the menu list. Press [P5] for fast page turning.
3. Press [PUSH] to enter the CHAN MENU list.
4. Use [P4], [P6], or the channel knob to select the desired setting.

8.1 RCDT (CTCSS/DCS Decode Setup)

1. Enter CHAN MENU, select function No.1.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• OFF: Disable CTCSS/DCS decode.
• CTCSS: Enable CTCSS decode.
• DCS: Enable DCS decode.
4. After selecting the decode type, press [PUSH] to enter value setup. Turn the channel knob to choose the desired CTCSS/DCS code.
• CTCSS: 62.5-254.1Hz, plus one self-define group (52 groups total).
• DCS: 000N-777I (1024 groups total). 'N' denotes positive code, 'I' denotes inverse code.
5. Press [FUNC] to choose between positive or inverse code.
6. Press [PUSH] or [P3] to save and exit.

Note: CTCSS/DCS decode functions work in conjunction with the squelch mode setup. Refer to Signaling Combination setup (Page 21).

8.2 CTCSS/DCS Encode Setup

1. Enter CHAN MENU, select function No.2.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• OFF: Disable CTCSS/DCS encode.
• CTCSS: Enable CTCSS encode.
• DCS: Enable DCS encode.
4. CTCSS: 62.5-254.1Hz, plus one self-define group (52 groups total).
5. DCS: 000N-777I (1024 groups total). 'N' denotes positive code, 'I' denotes inverse code.
6. Press [FUNC] to choose between positive or inverse code.
7. Press [PUSH] or [P3] to save and exit.

Note: This setting is valid only when CTCSS/DCS signaling is added.

8.3 HIGH/MID/LOW Power Selection

1. Enter CHAN MENU, select function No.3.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired power level:
• HI: High power level.
• MI: Middle power level.
• LO: Low power level.
4. Press [PUSH] or [P3] to save and exit.

8.4 Signaling Combination Setup

This function helps improve the blocking of irrelevant signals.

1. Enter CHAN MENU, select function No.4.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• SQ: Hear calls when a matching carrier is received.
• CDT: Hear calls when a matching carrier and CTCSS or DCS signaling are received.
4. Press [PUSH] or [P3] to save and exit.

Note: This setting is valid only when CTCSS/DCS signaling is added.

8.5 Band-width Selection

Select suitable bandwidth according to local conditions.

1. Enter CHAN MENU list, select function No.5.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• WID: 25k (Wide band).
• MID: 20k (Middle band).
• NAR: 12.5k (Narrow band).
4. Press [PUSH] or [P3] to save and exit.

8.6 Reverse TX/RX

When this function is enabled, the TX frequency becomes the RX frequency, and the RX frequency becomes the TX frequency. Signaling will also be reversed if CTCSS/DCS is active on the channel.

1. Enter CHAN MENU list, select function No.6.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enable reverse function.
• OFF: Disable reverse function.
4. Press [PUSH] or [P3] to save and exit.

8.7 Talk Around

This function allows direct communication with other radios when a repeater is not active or out of range. The transceiver transmits using the RX frequency and its CTCSS/DCS signaling.

1. Enter CHAN MENU list, select function No.7.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: Enable talk around function.
• OFF: Disable talk around function.
4. Press [PUSH] or [P3] to save and exit.

Note: This function is hidden when RTDF function is active.

8.8 Offset Frequency And Direction Setup

1. Enter CHAN MENU list, select function No.8.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• -: Minus offset (transmitting frequency is lower than receiving frequency).
• +: Plus offset (transmitting frequency is higher than receiving frequency).
• OFF: Offset is turned off (transmitting frequency equals receiving frequency).
4. VHF frequency range: 0 - 38 MHz.
5. UHF frequency range: 0 - 90 MHz.
6. Press [PUSH] or [P3] to save and exit.

Note: Offset frequency is adjusted according to step size setup. This function is hidden when RTDF function is active.

8.9 Editing Channel Name

After editing a channel name, if the display mode is set to channel name, the radio will show the edited name. Otherwise, it will display the frequency.

1. Enter CHAN MENU list, select function No.9.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting. Press [PUSH] to confirm and enter editing for the next character.
4. Press [PUSH] or [P3] to save and exit.

Note: This function is auto-hidden in Frequency (VFO) mode or when RTDF function is active.

8.10 Busy Channel Lockout

This feature prevents transmission when a signal is already being received on the channel. If the channel is busy and [PTT] is pressed, the radio will beep as a warning and return to receiving.

1. Enter CHAN MENU list, select function No.10.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• BU: Signaling busy lockout; transmission is inhibited when the current channel receives a matching carrier.
• RL: Signaling busy lockout; transmission is inhibited when the current channel receives a matching carrier but with a mismatching CTCSS/DCS code.
• OFF: Busy channel lockout is disabled; transmission is allowed regardless of receiving status.
4. Press [PUSH] or [P3] to save and exit.

8.11 TX OFF

This function disables transmission.

1. Enter CHAN MENU list, select function No.11.
2. Press [PUSH]. The menu value will turn green.
3. Turn the channel knob to choose the desired setting:
• ON: TX is allowed; press [PTT] to transmit.
• OFF: TX is not allowed; pressing [PTT] will emit a beep.
4. Press [PUSH] or [P3] to save and exit.

9. Keypad Menu Setup

9.1 Main Unit Keypad Menu Setup

1. Hold [FUNC] for over 2 seconds to enter the SELECT MENU interface.
2. Use [P4], [P6], or the channel knob to navigate the menu list. Press [P5] for fast page turning.
3. Press [PUSH] to enter the MINI KEY menu list.
4. Use [P4], [P6], or the channel knob to choose a function group. Short press [PUSH] to confirm.
5. Short press [P1] - [P6] to select the desired self-defined key.
6. Short press [FUNC] to confirm and exit.

9.2 H-DIM Microphone Keypad Backlight Setup

1. Hold [FUNC] for over 2 seconds to enter the SELECT MENU interface.
2. Use [P4], [P6], or the channel knob to navigate the menu list. Press [P5] for fast page turning.
3. Press [PUSH] to enter the HANDY KEY menu list, select function No.1, then press [PUSH] to enter value setting. The menu value will turn green.
4. Turn the channel knob to choose the desired setting. The microphone keypad backlight has 32 brightness levels (OFF-31). 'OFF' turns off the backlight.
5. Press [PUSH] or [P3] to save and exit.

9.3 H-PA H-PD Microphone Self-Define Keypad Setup

1. Hold [FUNC] for over 2 seconds to enter the SELECT MENU interface.
2. Use [P4], [P6], or the channel knob to navigate the menu list. Press [P5] for fast page turning.
3. Press [PUSH] to enter the HANDY KEY menu list, select functions No.2-5, then press [PUSH] to enter value setting. The menu value will turn green.
4. Turn the channel knob to choose the desired setting.
5. Press [PUSH] or [P3] to save and exit.

10. Programming Software

Install USB Cable Driver Programme

1. On your computer, click the Start menu, navigate to "ALL PROGRAMS", then find the AT-778UV program and click "USB To Com port" to install the driver as indicated.
2. Connect the optional PC55 USB Programming cable to a USB port on your PC and the transceiver.
3. Double-click the AT-778UV shortcut or find it in the start menu index. Select the indicated serial COM port and click OK to launch the programming software.
4. Follow the on-screen instructions, select the correct "COM Port", and click "OK" to start the programming software.

Note: The selected COM Port may differ even on the same computer when using different USB ports.

Important: Install the software before connecting the USB cable. Ensure the transceiver is switched on before writing frequencies. Avoid switching the transceiver's power on or off while it is connected to the computer, as this can prevent frequency read/write operations. If this occurs, close the software, disconnect the USB cable, reinsert it, reopen the software, and reselect the COM Port. Connect the transceiver to the computer only after switching it on, and do not restart the transceiver's power while connected.

11. Maintenance

11.1 Default Setting after Resetting

After a factory reset, the transceiver's settings will revert to the following defaults:

11.2 Trouble Shooting

12. Specifications

General

Note: Specifications are subject to change without notice due to technological advancements.

Transmitter

Receiver

13. Attached Chart

52 groups CTCSS Tone Frequency (Hz)

1024 groups DCS Code