پرسشنامه مشتری
“Hi!
Which model to use when transmitting 1080 video and audio over a distance of 6-20 کیلومتر?
Requires the ability to program the parameters of the transmitter and receiver.
COFDM
محدوده فرکانس: 280 – 300 مگاهرتز
RF impedance: 50 اهم
RF connector: زن SMA
Lower delay, the minimum end-to-end delay is 250ms
128-bit AES encryption and decryptionTX
– Transmit power: 15 – 25 W
– Input video: 1Vp-p, 75آه
– Input audio: استریو
– Video program format: MPEG-2
– Input video: 1080 50من, 1080 60من, 1080 24پ, 1080 25پ, 1080 30پ, 1080 50پ, 1080 60پ, various modes are adaptive.
– Video format: NTSC, PAL را می توان تنظیم کرد
– Operating temperature: -20 ° C +50 درجه سانتی گرادRX
– Sensitivity: -94dBm at 8M
– Video image: 1080
– Audio output mode: stereo unbalanced 300 / 200mv
– Operating temperature: -20 ° C +50 درجه سانتی گرادWhat 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, زمان تاخیر کم, و encryption — indicating use in صنعتی, military, or public safety برنامه.
Let’s break down the key points:
1. محدوده انتقال (6–20 km)
The customer needs a long-distance, خط دید (LOS) video link.
At such ranges, typical 1W–5W COFDM transmitters are insufficient; hence the specified 15–25W RF power output suggests either:
- آ ground-to-ground link requiring strong signal penetration, یا
- آ UAV-to-ground یا 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. محدوده فرکانس: 280–300 MHz
این VHF band is less common than the typical 1.4GHz–2.4GHz links used in drones. هر چند, it offers:
- Better diffraction over obstacles
- Longer propagation distance
- Stronger penetration through vegetation and buildings
It is often used in military, معادن, and rescue communications where the environment is complex and high frequency links fail.
3. Low Delay and High Definition
آ minimum delay of 250 اماس is quite acceptable for broadcast and monitoring.
در 1080P input support (50I/60I/24P/25P/30P/50P/60P) means the customer requires full HD compatibility with professional video cameras or encoders.
استفاده از 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, 16قام, و غیره.)
- Set encryption keys or transmission rate
Such functionality points to professional or tactical-grade COFDM systems, not consumer-level equipment.
محصول پیشنهادی
A suitable model for this specification would be similar to the VCAN-280M COFDM Long-Range Video Transceiver سیستم:
ویژگی های کلیدی:
- محدوده فرکانس: 280–300 MHz (قابل تنظیم)
- توان خروجی: 10W / 15W / 20W / 25W options
- Transmission range: تا 20 کیلومتر
- ورودی فیلم: HDMI, از, or SDI options
- رمزگذاری: MPEG-2 or H.264 available
- عوارض: 200–250 ms end-to-end
- رمزگذاری: 128-بیت AES
- Adjustable modulation bandwidth: 2/4/8 مگاهرتز
- Configurable via PC software or onboard OSD
- دمای کارکرد: -40°C ~ +70°C
- رابط RF: زن SMA, 50امپدانس Ω
- IP-rated aluminum enclosure for outdoor use
برنامه های کاربردی
- Long-range video relay for unmanned vehicles (پهپاد, در 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 (توان خروجی, interface type, and encryption options), typical pricing ranges are:
| پیکربندی | شرح | Estimated Price (دلار آمریکا) |
|---|---|---|
| 10W COFDM Transceiver | 1080پ, 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.)
نتیجه گیری
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, رمزگذاری AES, and stable full HD video.
Such solutions are ideal for critical missions where reliability, signal security, and long-distance coverage are essential.
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