جهاز إرسال COFDM طويل المدى 1080P بطول 20 كم

جدول المحتويات

استفسار العملاء

“Hi!

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

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

COFDM
نطاق الترددات: 280 – 300 ميغاهيرتز
RF impedance: 50 أوم
RF connector: SMA أنثى
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-ص, 75أوم
– Input audio: ستيريو
– Video program format: MPEG-2
– Input video: 1080 50أنا, 1080 60أنا, 1080 24ص, 1080 25ص, 1080 30ص, 1080 50ص, 1080 60ص, various modes are adaptive.
– Video format: NTSC, يمكن ضبط PAL
– Operating temperature: -20 ° C ~ +50 درجة مئوية

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

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, الكمون المنخفض, و encryption — indicating use in صناعي, military, or public safety التطبيقات.

Let’s break down the key points:

1. نطاق الإرسال (6–20 km)

The customer needs a long-distance, خط البصر (ال) video link.
At such ranges, typical 1W–5W COFDM transmitters are insufficient; hence the specified 15–25W RF power output suggests either:

أ ground-to-ground link requiring strong signal penetration, أو
أ UAV-to-ground أو 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. نطاق الترددات: 280–300 MHz

هذا VHF band is less common than the typical 1.4GHz–2.4GHz links used in drones. لكن, it offers:

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

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

3. Low Delay and High Definition

أ minimum delay of 250 تصلب متعدد is quite acceptable for broadcast and monitoring.
ال 1080P input support (50I/60I/24P/25P/30P/50P/60P) means the customer requires full HD compatibility with professional video cameras or encoders.
استخدام 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, إلخ)
Set encryption keys or transmission rate

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

التطبيقات

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

Estimated Pricing

While the final price depends on configuration (طاقة الإخراج, interface type, and encryption options), typical pricing ranges are:

ترتيب	وصف	Estimated Price (دولار أمريكي)
10W COFDM Transceiver	1080ص, 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.)

خاتمة

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, تشفير AES, and stable full HD video.

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