The BelFone BF-TD512 is a digital FM transceiver designed for professional radio communications. It is a VHF/UHF digital FM transceiver model, indicating its capability to operate across both Very High Frequency and Ultra High Frequency bands for versatile communication.
Function Description
The BF-TD512 serves as a two-way radio for various communication needs. It supports both digital and analog modes, allowing for flexible integration into existing radio systems. Key functions include:
- Voice Communication: The primary function is to enable voice calls, including private calls, group calls, and all calls. It supports digital compatible analog channel PTT key and analog compatible digital channel PTT key.
- Messaging (SMS): The device allows users to send and receive text messages, with the capacity to store up to 30 received messages and 10 preset messages.
- Scanning: It features a scan function to monitor channels, detect activities, and receive calls.
- Zone Management: The radio supports up to 32 zones, with each zone capable of holding a maximum of 16 channels, totaling 512 channels.
- Emergency Features: It includes a digital emergency function with three emergency types and three emergency modes (Regular, Silent, Silent with Voice, Emergency Mode) to ask for help in critical situations.
- Man Down: This feature automatically sends an alarm if the radio is positioned at an angle (30°-45°-60°) for a preset period, indicating a potential fall or incapacitation of the user.
- GPS Positioning: The device can display location information, including GPS data like time, date, longitude, latitude, speed, altitude, and number of available satellites. It can also transmit its positioning information to an individual user.
- Voice Encryption: This feature enhances privacy by encrypting audio signals.
- Dual Capacity Direct Mode: Enables two voice calls in two slots synchronously, improving channel efficiency.
- Radio Priority-Based Interrupt: Allows a call to interrupt an on-going call on a current channel, or a preemptive call to interrupt other on-going calls with lower priority.
- Voice Recording: The device can record and store voice memos, with 2 Rec modes available (compress or uncompress).
- CTCSS/CDCSS: Supports unique CTCSS/CDCSS to guarantee privacy of communication on digital compatible analog channel or analog compatible digital channel.
Important Technical Specifications
The BF-TD512 boasts a robust set of specifications:
- Frequency Range: UHF: 350-390 MHz/UHF: 400-480 MHz/450-520 MHz.
- Channel Capacity: 512 channels.
- Zones: 32 zones.
- Channel Spacing: 12.5 kHz/25 kHz.
- Operating Voltage: DC 7.4V (±20%).
- Battery Capacity: 2000 mAh.
- Battery Life (5/5/90): Digital 22 Hours, Analog 16 Hours.
- Recording Time: Analog 16 Hours.
- Frequency Stability: ±1.5ppm.
- Antenna Impedance: 50Ω.
- Dimensions (L×W×H): 57 (L) * 32(W) * 119 (H)mm.
- Weight: Not specified in the provided text, but typically included in full specifications.
Transmitter:
- RF Output Power: High Power: 5W, Low Power: 1W.
- 4FSK Modulation: 12.5kHz Data: 7K60FXD, 12.5kHz Data and Audio: 7K60FXE.
- FM Modulation: 12.5 kHz: 8K50F3E, 25 kHz: 16KΦF3E.
- Modulation Limiting: +/- 2.5kHz @ 12.5kHz; +/- 5kHz @ 25kHz.
- FM Noise: -40dB.
- Conducted Emission: -36 dBm≤1GHz/-30 dBm≥1GHz.
- Adjacent Channel Power: ≤ -60dB.
- Audio Response: +1/-3 dB.
- Audio Distortion: 3%.
- Digital Voice Coder Type: AMBE3000.
Receiver:
- Digital Sensitivity: 5% BER: 0.25 uV.
- Analog Sensitivity: 0.25 uV (12 dB SINAD).
- Intermodulation: 60dB.
- Adjacent Channel Selectivity: 60 dB.
- Spurious Response Rejection: 60 dB.
- FM Noise: -40dB.
- Audio Response: +1/-3 dB.
- Audio Output Power: 1.5W.
- Audio Distortion: 3% (typical).
- Conducted Spurious Emission: -57dBm.
- GPS Accuracy: Horizontal Accuracy ≤ -10m (with well signal).
- TTFF (Time To First Fix) Cold Start: < 1 Minute (with well signal).
- TTFF (Time To First Fix) Hot Start: < 1 Minute (with well signal).
Environmental Specifications:
- Working Temperature: -20°C — +60°C.
- Storage Temperature: -30°C — +85°C.
- Humidity: MIL-STD-810C/D/E/F Standard.
- Vibration & Shock: MIL-STD-810C/D/E/F Standard.
- Dustproof & Waterproof: IP67.
Usage Features
The BF-TD512 is designed for user-friendly operation with several features:
- Channel Selector Knob: Turn the knob to select channels 1-16.
- Power Switch/Volume Adjust Keys: Turn clockwise to switch the radio power on, increase volume; turn counter-clockwise to decrease volume, switch off.
- LED Indicator: Displays red for transmitting, green for receiving, and flashing red for un-programmed channels or scanning.
- Orange Button: Programmable function button.
- Speaker & MIC: For audio input and output.
- PTT Key: Press and hold to transmit.
- Button 1 & Button 2: Programmable function buttons.
- MIC-SP-USB Jack: Connects to optional speaker/MIC and USB programming cable.
- LCD Icons: A variety of icons on the LCD display indicate signal strength, digital mode, analog mode, keypad locked, call types (private, group, all), scanning, unread messages, inbox/outbox full, message sent/failed, GPS on, record on, and battery capacity.
- Adjusting Volume: Rotate the power switch/volume adjust keys to adjust the volume level.
- Selecting a Channel/Zone: Turn the channel selector knob to select channels or zones. The radio supports up to 32 zones, each with a maximum of 16 channels, with 512 channels in total.
- Dual Modes Switching: Easily switch between D/A compatible digital mode and analog mode.
- Call Features: Supports private calls, group calls, and all calls with options for one-touch call and call log management.
- Button Setting: Programmable keys for enhanced convenience, with various functions available on analog mode.
- Backlight: Adjustable backlight parameters for optimal visibility.
- Boot Interface: Customizable boot screen with BelFone logo and device name.
- Keypad Lock: Prevents accidental operation.
- LED Indicator: Provides visual feedback on radio status (green for RX, red for TX, orange for scan).
- VOX: Enables hands-free communication.
- Language: Supports Chinese and English.
- RTC Configure: Sets current date and time.
- U Disk Mode: Stores voice memos in transceiver memory, allowing transfer to PC.
- Theme Choose: Offers 4 display themes (Default, Light Yellow, Light Blue, Light Green).
- System Info: Displays basic radio information (battery status, firmware version, CP version, hardware version, voice record version, GPS data).
- Battery Status: Provides real-time battery capacity information.
- GPS Data: Displays longitude, latitude, time, date, speed, altitude, and satellite number.
- Send GPS Data: Sends GPS position information.
- Channel Configure: Modifies current channel parameters (RX/TX frequency, channel name, TOT, TX contact, CC index, choose slot, RX group list, analog channel to modify RX/TX frequency, channel name, TOT, CTCSS/CDCSS).
- TX Permission: Restricts channel usage based on various parameters (color code, channel free, PTT key).
- Battery Saver: Automatically enters battery saver mode to extend battery service life.
- Low Battery Warning: LED indicator glows red and a warning tone sounds when battery gets low.
Maintenance Features
Proper maintenance ensures the longevity and optimal performance of the BF-TD512:
- Battery Care:
- Avoid short-circuiting the battery to prevent damage or burst.
- Do not remove the casing from the battery.
- Do not throw the battery into fire or use it in dangerous areas.
- Charge the battery within 5°C-40°C.
- Do not cut off power supply or remove battery when charging.
- Never charge a battery that is wet; dry it with soft cloth prior to charge.
- If the battery is fully charged, the operating time is noticeably shorter than normal performance; it is time to buy a new battery.
- Fully charge a battery before storing it for a long time.
- Recharge a battery after several months' storage (3 months for Ni-MH, 6 months for Li-Ion & Li-polymer).
- Store battery in a cool, dry place under room temperature to reduce self-discharge.
- Cleaning: Clean the radio surface with a cloth moistened with clean water and a mild dishwashing liquid.
- General Precautions:
- Do not leave the transceiver in direct sunlight for a long time, or place it on unstable surfaces.
- When restriction or warnings are posted regarding the use of radio devices, obey the regulation.
- Do not use the radio while driving against traffic laws.
- If any problems occur, turn off the radio first and contact a local dealer or certified technician.
- For service and development, contact BelFone's technical engineer or dealer.
- Explosive Atmospheres: Turn off the power in explosive atmospheres (flammable gas, dust particles, much powder area).
- Usage Rate: Recommended usage rate is 1 minute for TX and 4 minutes for RX.
- Installation: Follow instructions for attaching/removing antenna, belt clip, strap, and battery.
- Charger Status: The charger indicator glows green for standby/no-load and fully charged, and red for charging.
- Speaker/Microphone Attachment: Open the accessory jack cover, align the plug, and tighten the screw.
The manual emphasizes that illegal operation of unlicensed radio transmitters is punishable by fine or imprisonment. It also states that BelFone reserves the right to change product design and specifications without prior notice.
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