Bộ thu phát COFDM 1080P tầm xa 20km

Mục lục

Thắc mắc khách hàng

“Hi!

Which model to use when transmitting 1080 video and audio over a distance of 6-20 km?

Requires the ability to program the parameters of the transmitter and receiver.

COFDM
Dải tần số: 280 – 300 MHz
RF impedance: 50 ồ
RF connector: SMA nữ
Lower delay, the minimum end-to-end delay is 250ms
128-bit AES encryption and decryption

TX
– Transmit power: 15 – 25 W
– Input video: 1Vp-p, 75om
– Input audio: âm thanh nổi
– Video program format: MPEG-2
– Input video: 1080 50TÔI, 1080 60TÔI, 1080 24P, 1080 25P, 1080 30P, 1080 50P, 1080 60P, various modes are adaptive.
– Video format: NTSC, PAL có thể được đặt
– Operating temperature: -20 ° C ~ +50 ° C

RX
– Sensitivity: -94dBm at 8M
– Video image: 1080
– Audio output mode: stereo unbalanced 300 / 200mv
– Operating temperature: -20 ° C ~ +50 ° C

What is the price of such a transmitter and receiver?”

Customer Requirement Analysis

This inquiry describes a professional-grade long-range COFDM video and audio transmission system, intended for reliable HD broadcast over 6–20 km. The customer clearly understands the technical requirements, specifying both RF and video parameters, along with programmability, độ trễ thấp, và encryption — indicating use in industrial, military, or public safety applications.

Let’s break down the key points:

1. Phạm vi truyền (6–20 km)

The customer needs a đường dài, line-of-sight (CÁC) video link.
At such ranges, typical 1W–5W COFDM transmitters are insufficient; hence the specified 15–25W RF power output suggests either:

Một ground-to-ground link requiring strong signal penetration, hoặc là
Một UAV-to-ground hoặc là vehicle-to-command station setup requiring robust signal stability.

This aligns with high-power COFDM transmitters in the 280–300 MHz band, suitable for long-range and non-line-of-sight (NLOS) video transmission.

2. Dải tần số: 280–300 MHz

Cái này VHF band is less common than the typical 1.4GHz–2.4GHz links used in drones. Tuy nhiên, it offers:

Better diffraction over obstacles
Longer propagation distance
Stronger penetration through vegetation and buildings

It is often used in military, Khai thác, and rescue communications where the environment is complex and high frequency links fail.

3. Low Delay and High Definition

Một minimum delay of 250 bệnh đa xơ cứng is quite acceptable for broadcast and monitoring.
Các 1080P input support (50I/60I/24P/25P/30P/50P/60P) means the customer requires full HD compatibility with professional video cameras or encoders.
Việc sử dụng MPEG-2 encoding indicates a traditional COFDM modulator setup—stable, though less efficient than modern H.265 systems.

4. AES-128 Encryption

Encryption is essential for security — a requirement common in:

Defense and law enforcement
Surveillance systems
Private network transmission

This ensures the signal cannot be easily intercepted or decoded.

5. Programmable Parameters

The request to “program the parameters of the transmitter and receiver” suggests that the customer wants to:

Change working frequency or bandwidth
Adjust modulation (QPSK, 16QAM, vân vân.)
Set encryption keys or transmission rate

Such functionality points to professional or tactical-grade COFDM systems, not consumer-level equipment.

Sản phẩm được đề xuất

A suitable model for this specification would be similar to the VCAN-280M COFDM Long-Range Video Transceiver hệ thống:

Các tính năng chính:

Dải tần số: 280–300 MHz (customizable)
Công suất ra: 10W / 15W / 20W / 25W options
Transmission range: lên đến 20 km
Đầu vào video: HDMI, CỦA, or SDI options
Mã hóa: MPEG-2 or H.264 available
Độ trễ: 200–250 ms end-to-end
Mã hóa: 128-bit AES
Adjustable modulation bandwidth: 2/4/8 MHz
Configurable via PC software or onboard OSD
Nhiệt độ hoạt động: -40°C ~ +70°C
Giao diện RF: SMA nữ, 50Ω trở kháng
IP-rated aluminum enclosure for outdoor use

Các ứng dụng

Long-range video relay for unmanned vehicles (Uavs, tại UGV)
Mobile command centers và surveillance vans
Broadcast and TV relay links
Border patrol và public safety monitoring
Search and rescue operations requiring reliable HD video

Estimated Pricing

While the final price depends on configuration (công suất đầu ra, interface type, and encryption options), typical pricing ranges are:

Cấu hình	Sự miêu tả	Estimated Price (đô la Mỹ)
10W COFDM Transceiver	1080P, AES128, programmable	$1,850 - $2,200
15W COFDM Transceiver	Long-range up to 15km	$2,300 - $2,600
20–25W COFDM Transceiver	Up to 20km+ range, outdoor unit	$2,800 - $3,500

(Price includes both TX and RX, power cables, and configuration software.)

Phần kết luận

The customer’s request represents a professional-grade COFDM long-distance video/audio system, optimized for secure HD transmission over 6–20 km.
A configurable system like VCAN-280M meets all their needs — programmable frequency, low delay, Mã hóa AES, and stable full HD video.

Such solutions are ideal for critical missions where reliability, signal security, and long-distance coverage are essential.