UHF Video Transmitter Receiver Pair – P2MP FAQ Guide

COFDM Solution for 507.25 メガヘルツ (チャネル 20) アプリケーション

Many customers are looking for a UHF NTSC CVBS video transmitter/receiver pair 以下の仕様で:

• 周波数: 507.25 メガヘルツ (チャネル 20)
• 帯域幅: 6 メガヘルツ
• 出力電力: 250 mW or 500 mW
• Topology: ポイントツーマルチポイント (P2MP)
• 小さくてコンパクトなサイズ

To meet these requirements, we recommend our digital COFDM solution:

COFDM-912T

Although the customer originally requested an analog/FM UHF system, 私たちの COFDM digital transmission system provides a more stable, 耐干渉性, and professional-grade solution — especially in complex RF environments.

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よくある質問 (よくある質問)

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1️⃣ How many receivers can work with one transmitter in P2MP mode?

The COFDM system operates in broadcast mode, similar to a TV station.

✔ One transmitter can transmit to multiple receivers simultaneously.
✔ All receivers within coverage area and properly configured can receive the signal at the same time.
✔ There is no fixed theoretical limit on the number of receivers.

The actual number depends on:

• Signal coverage
• 受信感度
• Antenna configuration
• RF environment conditions

In practical deployments, customers commonly use 5–20 receivers, but technically more are possible as long as signal strength is sufficient.

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2️⃣ Is your system compatible with existing transmitters or receivers?

互換性 cannot be confirmed without technical comparison and testing.

Wireless video systems must match in:

• 周波数
• 帯域幅 (6 MHz in this case)
• 変調方式 (COFDM vs analog FM)
• エンコード形式
• Protocol parameters

⚠ If your existing equipment is analog FM, it will NOT be compatible with digital COFDM systems.

Because the requested specification mentions NTSC CVBS at 507.25 メガヘルツ (analog TV channel 20), many legacy systems use analog modulation, while our solution uses digital COFDM modulation.

したがって:

✔ Compatibility requires parameter verification
✔ Lab testing is recommended
✔ Without testing, accurate confirmation is not possible

If you can provide your existing equipment specifications, we can help analyze feasibility.

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Why Choose COFDM Instead of Analog FM?

Although analog FM transmitters are still available, COFDM provides major advantages:

✔ Strong Anti-Interference Performance

Stable transmission even in urban or multipath environments.

✔ Better Video Stability

No snow, no ghosting, no gradual degradation like analog.

✔ Flexible Power Options

• 0.5W to 20W customizable
• Suitable for air-to-ground or ground applications

✔ Compact Size

Small transmitter modules available for space-limited applications.

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Typical Application Scenarios

• UAV video transmission
• Ground robotics
• 法執行機関
• Industrial wireless monitoring
• Temporary broadcast links

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Technical Summary

アイテム	サポートされています
周波数	200–860MHz (カスタマイズ可能な, 含む 507.25 メガヘルツ)
帯域幅	6 MHz supported
Video Input	CVBS (NTSC/パル)
力	0.5W–20W optional
P2MP	はい
変調	Digital COFDM

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Test Videos (2W Power Amplifier Example)

You can see real-world transmission performance here:

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Pricing Reference

Please check our updated price list here:
https://ivcan.com/price-list-for-cofdm-one-way-link-unidirectional-transmission/

(注記: Distance data shown is air-to-ground testing; ground usage may vary.)

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Need Help Selecting the Right Model?

If you are currently using an analog UHF system and considering an upgrade — or if you need a customized frequency such as 507.25 MHz — we are happy to assist.

Please share:

• 周波数
• Required distance
• 環境 (都会的な / 田舎 / 空対地)
• Existing equipment details (if any)

We will recommend the best configuration for your project.