AnyTone AT-5555N II 10 Meter Mobile Transceiver Instruction Manual

1. Introduction

The AnyTone AT-5555N II is an advanced 10-meter mobile transceiver designed for reliable communication. This upgraded model features enhanced noise reduction capabilities for both transmission and reception, ensuring clearer audio in various environments. It supports multiple modulation modes and offers a range of functions for versatile operation.

Key Features:

• Noise Reduction (NRC): TX and RX Noise Reduction to filter background noise, with adjustable levels.
• High Power Output: AM: 60W (PEP), FM: 45W, SSB: 60W (PEP).
• Multiple Modes: Supports FM, AM, USB, LSB, and PA modes.
• Frequency Range: 28.000 to 29.699 MHz.
• CTCSS/DCS: Integrated CTCSS/DCS for selective calling.
• Additional Functions: 7 WX channels, HI-CUT, NB/ANL, DW DUAL-WATCH, TOT, SWR Protection, Voltage Protection, VOX Function, Echo Function, RF Gain Adjustment, Mike Gain Adjustment, Offset Function, Beep Voice Prompt, Busy Channel Lock, Monitor, LED Brightness Adjustment.
• User Interface: Large LCD for frequency and information display, flexible menu, and PC programming software compatibility.

2. Package Contents

Verify that all items listed below are included in your package:

• AnyTone AT-5555N II 10 Meter Radio (x1)
• Microphone (x1)
• Mounting Bracket (x1)
• DC Power Cable (x1)
• Replacement Fuse (x1)
• English User Manual (x1)
• Screws Set (x1)

Figure 2.1: Contents of the AT-5555N II package. This image displays the main radio unit, microphone, DC power cable, mounting bracket, and a set of screws.

3. Setup

3.1 Mounting the Transceiver

The AT-5555N II is designed for mobile installation. Choose a secure location in your vehicle that allows for easy access to controls and clear visibility of the display. Ensure adequate ventilation around the unit.

• Use the provided mounting bracket and screws to secure the transceiver.
• The adjustable mounting bracket allows you to set the angle up to 25 degrees for optimal viewing.

Figure 3.1: The adjustable mounting bracket, allowing for angle adjustments up to 25 degrees for user comfort.

3.2 Connecting Power

• Connect the supplied DC power cable to the transceiver's power input.
• Connect the red wire to the positive (+) terminal of your vehicle's 13.8V DC power source and the black wire to the negative (-) terminal. Ensure a secure connection to prevent power loss or damage.

3.3 Antenna Connection

• Connect a suitable 10-meter antenna (not included) to the SO-239 antenna connector on the rear of the transceiver.
• Ensure the antenna is properly tuned for the 28.000 to 29.699 MHz frequency range to prevent high SWR and potential damage to the radio.

3.4 Microphone Connection

• Plug the microphone into the RJ-45 jack on the front panel of the transceiver.

Figure 3.2: The microphone connected to the front panel of the AT-5555N II transceiver.

4. Operating Instructions

4.1 Basic Operation

• Power On/Off: Press the power button to turn the unit on or off.
• Volume Control: Adjust the VOL knob to set the desired audio output level.
• Squelch Control: Rotate the SQ knob to adjust the squelch level, silencing background noise when no signal is present.
• Frequency Selection: Use the main tuning knob to select the operating frequency. The large LCD displays the current frequency.

Figure 4.1: The front panel of the AT-5555N II, showing the large LCD display and primary controls.

4.2 Modulation Modes

The transceiver supports the following modes:

• FM (Frequency Modulation): For clear, local communication.
• AM (Amplitude Modulation): Standard mode for general communication.
• USB (Upper Sideband): For long-distance communication.
• LSB (Lower Sideband): For long-distance communication.
• PA (Public Address): Allows the radio to function as a public address system.

4.3 Advanced Functions

• CTCSS/DCS: Use these codes for selective calling, allowing you to hear only transmissions from stations using the same code. Refer to the detailed manual for programming steps.
• Noise Reduction (NRC): Activate TX and RX Noise Reduction to minimize background interference. Levels can be adjusted via the menu.
• Dual Watch (DW): Monitor two different frequencies simultaneously.
• Time-Out Timer (TOT): Prevents excessively long transmissions by automatically stopping transmission after a preset time.
• HI-CUT: Filters out high-frequency noise for clearer audio.
• NB/ANL (Noise Blanker/Automatic Noise Limiter): Reduces pulse-type noise (e.g., ignition noise) and continuous noise.
• SWR Protection: Automatically reduces transmit power if high SWR is detected, protecting the final amplifier.
• Voltage Protection: Protects the radio from over-voltage conditions.
• VOX Function: Enables voice-activated transmission without pressing the PTT button.
• Echo Function: Adds an echo effect to your transmitted audio.
• RF Gain Adjustment: Adjusts the receiver's sensitivity to incoming signals.
• Mike Gain Adjustment: Adjusts the microphone input sensitivity.
• Offset Function: Used for repeater operation to set the transmit frequency offset from the receive frequency.
• LED Brightness Adjustment: Adjust the brightness of the LCD display.

4.4 Programming and Customization

The AT-5555N II features a flexible menu system and supports PC programming software for advanced customization of channels, features, and settings. This allows users to tailor the radio's operation to their specific needs.

5. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the transceiver. Avoid using harsh chemicals or abrasive cleaners.
• Connections: Periodically check all connections (power, antenna, microphone) to ensure they are secure and free from corrosion.
• Ventilation: Ensure the heatsink on the rear of the unit is free from obstructions to allow for proper cooling.

Figure 5.1: Rear view of the AT-5555N II, highlighting the heatsink for thermal management.

6. Troubleshooting

If you encounter issues with your AT-5555N II, refer to the following common problems and solutions:

• No Power: Check the DC power cable connections and ensure the vehicle's power source is active. Verify the fuse is intact.
• No Transmission/Reception: Ensure the antenna is properly connected and tuned. Check the selected frequency and mode. Verify squelch settings are not too high.
• Poor Audio Quality: Adjust the microphone gain, RF gain, and squelch settings. Check for activated noise reduction features (NRC, NB/ANL) and adjust as needed. Ensure the microphone is securely connected.
• High SWR Warning: Immediately stop transmitting. Check your antenna system for proper installation, tuning, and cable integrity.
• Display Issues: Check the LED brightness adjustment in the menu.

For more complex issues, consult the full English user manual or contact customer support.

7. Specifications

8. Warranty and Support

For warranty information, please refer to the documentation included with your purchase. For technical support or service inquiries, please contact your authorized AnyTone dealer or visit the official AnyTone website for contact details.