Lisheng Digital Base and Mobile Station AP3500
These radio operators use designated frequency bands to exchange information, participate in emergency communications, and conduct technical experiments. The term “mobile” specifically refers to the use of amateur radio equipment in a vehicle or portable unit, allowing the operator to contact others from almost anywhere. On the main characteristics of mobile amateur radio is its emphasis on two-way communication, which distinguishes it from other forms of radio broadcasting
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Description
General
| Specification / Parameter | Details |
|---|---|
| Frequency Range | UHF 400-520MHz | VHF 136-174MHz |
| Channel Capacity | 2000 Channels |
| Zone Capacity | 64 Zones |
| Channel Spacing | 25 / 20 / 12.5 KHz |
| Operating Voltage | 13.6 V ±15% |
| Current Drain | < 0.6A | < 2.0A | < 8A (50W) |
| Frequency Stability | ±0.5ppm |
| Antenna Impedance | 50Ω |
| Dimensions (H×W×D) | 170mm x 170mm x 57mm |
| Weight | 1.65kg |
| Front Case | PC+ABS |
| LCD Display | Color Display |
Transmitter
| Specification / Parameter | Details |
|---|---|
| RF Power Output | VHF High 50W, VHF Low 25W | UHF High 45W, UHF Low 25W |
| FM Modulation | 11KΦF3E@12.5KHz | 14KΦF3E@20KHz | 16KΦF3E@25KHz |
| 4FSK Digital Modulation | 12.5KHz Data Only: 7K60FXD | 12.5kHz Data & Voice: 7K60FXW |
| Conducted/Radiated Emission | -36dBm < 1GHz | -30dBm > 1GHz |
| Modulation Limiting | ±2.5KHz@12.5KHz | ±4.0KHz@20KHz | ±5.0KHz@25KHz |
| FM Noise | 40dB@12.5KHz | 43dB@20KHz | 45dB@25KHz |
| Adjacent Channel Power | 60dB@12.5KHz | 70dB@20/25KHz |
| Audio Response | +1 ~ -3 dB |
| Audio Distortion | ≤3% |
| Digital Vocoder Type | AMBE++ or SELP |
| Digital Protocol | ETSI-TS102 361-1, 2&3 |
Receiver
| Specification / Parameter | Details |
|---|---|
| Sensitivity (Analog) | 0.22μV (12dB SINAD) / 0.18μV (Typical) (12dB SINAD) |
| Sensitivity (Digital) | 0.20μV / BER 5% |
| Selectivity (TIA-603 / ETSI) | 60dB@12.5 KHz / 75dB@20&25KHz (TIA-603) 60dB@12.5KHz / 70dB@25KHz&20KHz (ETSI) |
| Intermodulation (TIA-603 / ETSI) | 75dB@12.5/20/25KHz (TIA-603) | 70dB@12.5/20/25KHz (ETSI) |
| Spurious Response Rejection | 75dB@12.5/20/25KHz (TIA-603) | 70dB@12.5/20/25KHz (ETSI) |
| S/N Ratio | 40dB@12.5KHz | 43dB@20KHz | 45dB@25KHz |
| Rated Audio Power Output | 3W |
| Rated Audio Distortion | ≤3% |
| Audio Response | +1 ~ -3 dB |
| Conducted Spurious Emission | < -57 dBm |
Environmental Specifications
| Specification / Parameter | Details |
|---|---|
| Operating Temperature | -30℃ ~ +60℃ |
| Storage Temperature | -40℃ ~ +85℃ |
| ESD | IEC 61000-4-2 (Level 4) ±8kV (Contact) ±15kV (Air) |
| U.S. Military Standard | MIL-STD-810 C/D/E/F/G |
| Dust & Water Intrusion | IP54 Standard |
| Humidity | Per MIL-STD-810 C/D/E/F/G Standard |
| Shock & Vibration | Per MIL-STD-810 C/D/E/F/G Standard |
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Radio Operators can engage in casual conversation, participate in competitions, or assist in emergencies, demonstrating a variety of activities within the scope of the hobby. The ability to communicate on the move enhances the flexibility and dynamic nature of amateur radio, making it an attractive option for individuals interested in radio technology and outdoor activities. In a mobile ham radio setup, operators typically use transceivers designed for use in vehicles or portable environments. These transceivers are equipped with the necessary controls and displays to operate while in motion and often come with an antenna can be mounted on a vehicle. In addition, operators can use handheld transceivers or portable antennas while performing mobile operations outside the vehicle, further expanding the potential of mobile communications. Mobile amateur radio operators are an integral part of emergency communications networks because they provide critical communications capabilities during natural disasters, civil emergencies, or other situations where traditional communications infrastructure may be compromised. The portability and self-sufficiency of mobile amateur radio equipment allows operators to quickly establish communications links in areas with limited or compromised infrastructure, making them a valuable asset when needed. Additionally, mobile amateur radio provides a sense of community and camaraderie among operators. Enthusiasts often join local radio clubs, attend ham festivals and conferences, and collaborate on projects to improve their broadcasting skills and knowledge. These social aspects of the hobby help form a supportive and vibrant community passionate about radio technology and its various applications. In summary, Mobile Amateur Radio is a dynamic and versatile radio communications platform that combines the excitement of mobile operations with the technical expertise of amateur radio. Whether having a casual conversation in a beautiful location, providing vital communications during an emergency, participating in an organized event, mobile amateur radio operators play a vital role in the world of amateur radio. As radio technology advances and the hobby continues to evolve, mobile ham radio remains a compelling avenue for radio enthusiasts to explore and enjoy.





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