VHF Digital Repeater system 150MHz digital band selective repeatre system for customized use
Digital VHF BDA band selective repeater system
A VHF BDA Digital Repeater is a telecommunications device used to extend the coverage range of Very High Frequency (VHF: 30–300 MHz) digital radio communication systems. Here’s a concise
Core Functions:
1. Signal Reception:
* Receives weak/attenuated digital radio signals (e.g., DMR, dPMR, P25 Phase 2) within the VHF band from user equipment (e.g., handheld radios).
2. Digital Processing:
* Decodes, regenerates, and error-corrects the digital signal (unlike analog repeaters that amplify noise).
3. Signal Retransmission:
* Rebroadcasts the cleaned digital signal at higher power to distant or obstructed areas.
Key Advantages:
* Extended Coverage: Overcomes terrain obstructions (buildings, hills) and VHF range limitations (~5–50 km line-of-sight).
* Signal Integrity: Regeneration prevents noise/error accumulation, maintaining voice/data quality.
* Spectral Efficiency: Supports digital modulation (e.g., TDMA), enabling multiple users on one frequency.
Feature
* Digital filtering supports adjustable bandwidth, each band supports three sub-bands.
* Each sub-band is turned on and off, and gain control is performed separately.
* Donor signal monitoring for easy optimization and troubleshooting
* Intelligent algorithm to prevent UL interference.
* Self-control to minimize interference for new rollout e-Node B.
Technical Specifications:
| Items | Specifications | |
| System | VHF | |
|
Frequency Range |
Uplink(Rx) |
150~ 153MHz (At least 5MHz Guard Bandwidth Between Uplink and Downlink) |
| Downlink(Tx) |
161-163MHz (At least 5MHz Guard Bandwidth Between Uplink and Downlink) |
|
| Bandwidth | Customized | |
|
Maximum Output Power |
Uplink | 20±2dBm |
| Downlink | 33±2dBm | |
| Maximum Gain | 80±3dB | |
| AGC Range | ≥20dB | |
| Maximum Input power(Non-Destructive) | ≤-10dBm | |
| VSWR | ≤ 2.4 | |
| System Delay | ≤ 6 μs | |
| I/O Impedance | 50 Ω | |
| Noise Figure | ≤ 8dB | |
|
Spurious Emission |
9kHz~ 1GHz: ≤ -36dBm | |
| 1GHz~ 12.75GHz:≤-30dBm | ||
| Third-order Inter-Modulation | ≤ -40dBm | |
| RF Connector | 2*N-Female | |
| Power Consumption | ≤ 30W | |
| Power Supply | Input:AC100~ 240V, 50/60Hz | |
| Dimensions | 450*335*180mm mm | |
| Weight | ≤ 12kg | |
| Alarm Monitoring System | Alarm for Uplink Self-Oscillation | |
| Isolation Detection | Isolation Check During Boot Time | |
| Operating Temperature | -10 ~ +50 °C | |
| Application | Indoor or Outdoor(IP65) | |
| Relative Humidity Range | ≤95%(Non condensing) | |
| Mounting | Wall Mounting | |
ATNJ Strength & Service
● Extensive Product Portfolios: We offer a wide range of products, ensuring that you have access to a diverse selection that meets your specific requirements:
● High End Concept: Our relentless pursuit of the latest technology and our unwavering dedication to commercialization and massive production sets us apart.
● Strong R&D Team: We boast a team of talented and highly skilled professionals who consistently push the boundaries of innovation.
● Customized Product Development: With our exceptional ability to develop customized products in the industry, we ensure that the unique needs of our customers are met with the highest precision and efficiency.
● Expert Solutions: A team of experts with 20 to 30 years of experience is committed to providing perfect solutions, specifically tailored to the challenges faced by our valued customers.
● ISO/CE Certified Quality: Our commitment to excellence is underscored by the certification of our products, ensuring superior quality and reliability.
FAQ:
1. Are you trading company or manufacturer ? Could I use our own logo and label? We are the factory, with good trading service.
2. Can I have a sample order? What is your MOQ?
Yes, we welcome sample order to test and check quality. MOQ is 1 for normal products.
3: Is it easy to set up your items?
Yes. We have a user manual and support technical support 24/7.
4. What is your warranty time?
We promise 3-year warranty for all products shipped from us. Man-made sabotage and natural factors are not within the scope of warranty.
We have CE, ROHS, CCC etc, certificates .
6. Please feel free to contact us if there are any other questions.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.