Q1: What is the FHSS Frequency-hopping spread spectrum?

A1: Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals that involves rapidly changing the carrier frequency among a wide range of frequencies. FHSS will occur automatically on both the transmitter and receiver at the same time. FHSS is used to prevent eavesdropping and interference on the long-range wireless video transmitter and receiver. When the current working frequency is jammed or interfered with, the transmitter and receiver disconnect and hop to the next available frequency to reconnect.

Q2: Why do you need the FHSS function?

A2: 1. Because the signal hops to a different frequency band, FHSS signals are highly resistant to narrow-band interference. 2. If the frequency-hopping pattern is unknown, signals are difficult to intercept. 3. Jamming is also difficult if the pattern is unknown; if the spreading sequence is unknown, the signal can only be jammed for a single hopping period. 4. With minimal mutual interference, FHSS transmissions can share a frequency band with many types of conventional transmissions. FHSS signals interfere in narrow-band communications and vice versa.

Q3: How to set the FHSS at your wireless video data transmitter and receiver?

A3: At the web manager UI , please choose the advance page, you can see the above picture. https://i0.wp.com/ivcan.com/wp-content/uploads/2022/02/UI-Advance.webp

Q4: 7 tips you should know before you choose a wireless video transmitter and receiver with FHSS function.

A4: 1. TX900B-2W supports the frequency range is 1420~1530MHz, and there is 110Mb bandwidth to use. 2. The customer can set the working bandwidth as 1.4M/3M/5M/10M/20MHz (However, 1.4M/3MHz may not be suited for video transmitting). Then TX900B-2W can work in FHSS mode (Frequency-hopping spread spectrum) and the system will automatically select the central working frequency and may do frequency hopping (between 1420~1530MHz) during its working. 3. Customers can also plan to use the frequency channels in the whole 1420~1530MHz and set the device to work in the fixed frequency channels too. 4. TX900B-2W supports the longest distance at 22km. Except for the frequency range supported and the longest distance, the physical appearance, interface, UI, operation, and so on, the TX900B-2W is the same as the existing TX900B-15km-2W. 5. TX900B-2W only support a frequency range is 1420~1530MHz, it does not support 800MHz and 2.4GHz frequency range. 6. There are two versions, TX900B-2W-15km, and TX900B-2W-22km. 7. As the TX900B-2W frequency range is 110Mb, so if you config the working bandwidth as 10Mb, then you will get 11 points to hopping.

Q5: What is the working principle of your FHSS?

Our wireless video transceiver adopts intelligent frequency selection-interference avoidance. Intelligent frequency selection (interference avoidance) technology is a new anti-interference technology, which can effectively avoid interference and maximize the reliability and stability of wireless transmission. The key to our unique intelligent frequency selection (interference avoidance) technology lies in the three major processes of interference detection, decision-making, and switching execution. Interference detection refers to real-time detection of interference and background noise at each frequency point during normal communication, so as to provide basic support for decision-making. The decision-making is completed independently by each node, and the optimal frequency is selected based on the criterion of optimizing its own receiving performance. The point is used as the receiving frequency point; the switching execution occurs after the decision selects a new optimal frequency point, and the switching process will not cause data loss, ensuring stable and continuous data transmission. Our unique intelligent frequency selection (disturbance avoidance) technology enables each node to independently and dynamically select different optimal frequency points for different frequency networking, so as to optimize the overall network performance and effectively avoid interference. Please check the below picture, the blue area is the effective signal, and the red line is interference.

用于無線視頻數據鏈路嘅FHSS跳頻擴頻

FHSS點樣喺冇人機無線視頻發射器和接收器上工作?

FHSS係一種自動調頻技術. 我哋廣泛使用FHSS喺冇人機嘅無線視頻數據傳輸中. 因為冇人機嘅無線鏈路經常受到信號干擾.

在此視頻中, 該頻率點顯示當前信號強度.

的 1365 我哋睇到嘅係我哋無線傳輸設備嘅當前信號工作頻率啲.

點解呢個頻率會喺呢度?

因為右邊仲有其他信號喺干擾. 它將自動運行.

如果信號再次受到干擾, 它又跑了, 選擇干擾最小的頻率.

此過程旨在避免干擾. 我哋都稱它為FHSS函數.

第1季度: 乜嘢係FHSS跳頻擴頻?

A1: 跳頻擴頻 (福瑞斯) 係一種傳輸無線電信號嘅方法，涉及喺好寬嘅頻率範圍內快速改變載波頻率.

FHSS將同時喺發射器和接收器上自動發生. FHSS用于防止對遠程無線視頻發射器和接收器嘅竊聽和干擾. 当當前工作頻率被卡住或干擾時, 發射機和接收機斷開連接並跳到下一個可用頻率重新連接.

第2季度: 點解需要FHSS功能?

A2:
1. 因為信號跳到不同嘅頻段, FHSS信號對窄帶干擾具有很強的抵抗力.

2. 如果跳頻模式未知, 信號難以攔截.

3. 如果模式未知，干擾都好困難; 如果擴散序列未知, 信號只能擾一個跳頻周期.

4. 相互干擾最小, FHSS傳輸可以與許多類型的常規傳輸共享一個頻段. FHSS信號會干擾窄帶通信，反之亦然.

第3季度: 點樣喺無線視頻數據發射器和接收器上設置FHSS?

A3: 係 Web管理器UI, 請選擇高級頁面, 你可以睇到上面嘅圖.
https://i0.wp.com/ivcan.com/wp-content/uploads/2022/02/UI-Advance.webp

第4季度: 7 喺選擇具有FHSS功能嘅無線視頻發射器和接收器之前應了解嘅提示.

A4:
1. TX900B-2W系列支持頻率範圍為1420~1530MHz, 並且有110Mb帶寬可供使用.

2. 客戶可將工作帶寬設置為1.4M/3M/5M/10M/20MHz (然而, 1.4M/3MHz可能唔適合視頻傳輸). 咁TX900B-2W就可以係 FHSS模式 (跳頻擴頻) 系統會自動選擇中心工作頻率，並可進行跳頻 (1420~1530MHz之間) 在其工作期間.

3. 客戶仲可以計劃使用成個1420~1530MHz嘅頻率信道，並將設備設置為喺固定頻率信道中工作.

4. TX900B-2W系列支持最遠距離22km.
除了支持嘅頻率範圍同最長距離, 外貌, 接口, 用戶界面, 操作。, 等陣, TX900B-2W與現有嘅TX900B-15km-2W相同.

5. TX900B-2W系列僅支持1420~1530MHz的頻率範圍, 它唔撐800MHz同2.4GHz頻率範圍.

6. 有兩個版本, TX900B-2W-15公里, 同TX900B-2W-22km.

7. 作為 TX900B-2W系列頻率範圍為110Mb, 因此，如果您將工作帶寬配置為10Mb, 然後你會得到 11 指向跳躍.

第5季度: FHSS嘅工作原理係乜嘢?

我哋嘅無線視頻收發器採用智能選頻-避免干擾.

智能頻率選擇 (避免干擾) 技術係一種新型嘅抗干擾技術, 可以有效避免干擾，最大限度地提高無線傳輸的可靠性和穩定性.

我哋獨特嘅智能頻率選擇嘅關鍵 (避免干擾) 技術在於干擾檢測嘅三大過程, 決策, 同切換執行. 干擾檢測係指喺正常通信過程中，對各頻點嘅干擾和背景噪聲進行實時檢測, 從而為決策提供基本支持. 決策由各節點獨立完成, 並根據優化自身接收性能嘅標準選擇最佳頻率. 該點用作接收頻率點; 切換執行發生喺決策選擇新嘅最佳頻率啲之後, 並且切換過程唔會造成數據賴, 確保穩定和連續嘅數據傳輸.

我哋獨特嘅智能頻率選擇 (避免干擾) 技術令每個節點能夠獨立、動態地為不同的頻率組網選擇不同的最佳頻點, 從而優化整體網絡性能，有效避免干擾.

請查看下圖, 藍色區域係有效信號, 同紅線係干擾.
FHSS

Q6: Does your FPV VTX support the FHSS frequency automatic jumping function to avoid interference?

FPV VTX is a one-way transmission and cannot support the FHSS frequency automatic hopping function.

FPV VTX is a one-way transmission, which can transmit the video from the aircraft to the ground receiver through the transmitter.

FHSS function, when the user finds that the signal sensitivity is declining or encounters an obstacle, it will notify the transmitter and receiver to modify the frequency at the same time and find a frequency with the least interference for transmission. If only the receiver modifies the frequency without controlling the transmitter to modify the same frequency, the frequency of the transmitter and receiver will be inconsistent and the transmission will be interrupted.

Because of the above requirement of notifying the transmitter to modify the frequency, the FHSS function needs to be based on a two-way transmission system.

Or your FPV VTX can support modifying the frequency function through the serial port. When you need to modify the frequency, the operator sends a preset serial port command from the receiver to the serial port of the transmitter. After receiving this command notification, the transmitter automatically changes to the next frequency point.

This is equivalent to your wireless transmission equipment, which has both a one-way video transmission function and a two-way data transmission function, which is equivalent to your current wireless control system. So whether it supports the serial port to modify the frequency of the transmitter depends on whether your current device supports it.

Our models below support such functionality.
Vcan1776 VCAN1886型

FHSS Frequency-hopping spread spectrum — FHSS跳頻擴頻

問吓: 你是否有符合以下要求嘅視頻數據鏈路?

所需距離為 50 公里, 採用跳頻技術 (飛 1,000 一秒钟內嘅次數), 理想情況下高於6Ghz (其他可以考慮, 最緊要係跳頻技術), 並且仲需要傳輸數據, 视频, 並保護遠程控制通道, 最好係組數據鏈路 (器 + 接收機 + 天線) 使用跳頻技術 (福瑞斯)

iVcan回復: 唔, 頻率僅為1.4G, 6Ghz的工作頻率需要定制開發.

問吓: 你是否有任何可選型號嚟撐FHSS跳頻擴頻?

在下圖中, 你可以睇到有 12 為FHSS準備好嘅啲頻率.

FHSS Frequency-hopping spread spectrum for wireless video data link transmitter and receiver 6

實時干擾檢測功能

撐FHSS嘅產品

冇人機視頻發射器撐FHSS

無線電遙測撐FHSS

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傳輸距離

飛行控制協議

發射機視頻輸入

無線傳輸方式

障礙物和視線

加密和解密

傳輸載體

數據方向

天线

有關無線視頻發射器和接收器嘅常見問題解答

1. 您的無線視頻發射器具有哪些類型嘅視頻輸入端口?

我哋嘅無線視頻發射器具有呢啲類型嘅視頻輸入接口: 高清1080P同4K硬盤, 複合材料, Sdi。, 阿赫德, 網絡以太網, 法國國家石油公司, 或告訴我們您需要什麼類型, 我哋嘅工程師將根據您的需求進行修改.

2. 您的無線視頻發射器支持嘅傳輸距離係幾多?

我哋嘅傳輸距離可以透過添加功率放大器嚟調節. 現時, 主要嘅係 15公里, 30公里, 50公里, 80公里, 100公里 , 同150公里, 取決於客戶的需求.

答案係肯定嘅, 上面列出嘅傳輸距離都在 LOS視線範圍. 發射器和接收器之間是否有障礙物, 非眎距 (視線範圍), 傳輸距離大大縮短, 只有1公里或2公里, 取決於中間障礙物嘅數量同本地無線環境.

3. 乜嘢係單向或雙向? 簡單與半雙工, 全雙工

單向方法, 我哋只能由無線視頻發射器向一個方向發送和下載視頻或數據到接收器, 我哋無法把視頻或數據由接收器上傳到發射器. 此類型也稱為單純形.

雙向嘅 意味住, 我哋不僅可以把視頻或數據由無線發射器下載到接收器, 但我哋都可以把視頻或數據由接收器上傳到發射器. 非常適合操作冇人機. 你不僅可以看到由冇人機傳輸嘅實時視頻, 但也上傳命令以控制冇人機或命令以控制PTZ攝錄機以調整與發射器嘅角度. 可以同時運行. 此類型也稱為半雙工或全雙工.

請喺以下連結中查看詳細信息. https://ivcan.com/request-a-quote-of-wireless-video-transmission/#simplex

4. 您的HDMI視頻發射器是否支持加密和接收器解密?

大多數無線視頻發射器而家都撐 AES128或AES256 位加密和解密, 取決於您選擇的型號. 請聯繫我哋進行驗證.

5. 普通用戶收到貨物之後，無線視頻發射器嘅頻率是否可以修改?

無線視頻發射器和無線視頻接收器嘅頻率 可以修改。. 用戶需要購買額外嘅參數配置板.

然而, 考慮到貨物發出時相應嘅功率放大器和天線已經固定喺一定範圍內. 如果用戶調整發射機嘅頻率, 相應嘅 功率放大器, 發射天線和接收天線都應修改為相同嘅頻率, 呢啲用戶需要做好準備. 如果唔係, 它會導致無線視頻發射器嘅頻率與天線嘅頻率不同, 使接收變得困難. 因此，在下訂單之前，請務必告知您需要的正確頻率.

如果係為咗安全或保密, 您可以 使用加密和解密 發射器和接收器嘅功能, 可以確保您的視頻傳輸係私密嘅. .

6. 我睇到你嘅模型與我嘅需求非常相似, 但我需要修改其中一個參數, 這是可能的嗎?

系嘅, 我哋所有嘅產品 參數可定製 根據客戶需求. 如果您有特殊要求, 請透過下面嘅連結話畀我哋.

https://ivcan.com/request-a-quote-of-wireless-video-transmission/

7. 如果我嘅無線視頻接收器顯示微弱嘅信號，我點算好?

更改接收機嘅位置 避免強磁性環境嘅潛在局部干擾.
確保天線打開 發射器和接收器都係垂直嘅.
請將發射器和接收器嘅天線抬起至 保持一定的身高差.
請環顧四周，以確保 發射器和接收器之間冇障礙物.
更改方向 接收機天線.
如果它不起作用, 嘗試 將接收器移動到發射器位置附近 查看是否超過有效無線傳輸距離.
或考慮 添加傳輸中繼 發射器和接收器之間.
天線應儘可能離地面高, 因為地面會吸收傳輸嘅信號.

8. 我只能購買發射器和放大器嘅糢塊呀？? 我想把它們組裝到我嘅設備中.

我哋可以, 答案係肯定嘅, 供應無線視頻發射機 糢塊同功率放大器.

對於第一個樣品測試, 我建議你購買整套產品，因為我哋嘅工程師有優化參數以達到最佳性能.

完成測試驗證後, 您可以卸下機箱或散熱器, 將其安裝在您的設備中, 並不斷調整參數以達到最佳性能. 將來, 你將只能購買所需嘅糢塊或配件.

9. 你可唔可以攞一個測試視頻畀我睇，在發貨前?

答案係肯定嘅, 我哋都了解無線視頻傳輸發射器和接收器揦脷. 你遠離中國工廠. 並希望你收到嘅商品適合最佳性能.

如果您特別注意特定參數或功能, 我哋可以根據你想要查看嘅功能拍攝一些測試視頻, 請隨時與我哋聯繫. 未經您的批准，它不會直接運送給您.

10. 如何測試無線視頻發射器和接收器嘅延遲?

測試無線視頻發射器和接收器嘅延遲, 我哋需要做兩個測試.

首先係測試由相機到芒嘅延遲.

二係相機, 加上顯示器加上無線圖像傳輸發射器和接收器嘅延遲.

減去兩個測試結果係無線視頻發射器和接收器嘅實際延遲.

作為中國深圳專業嘅遠程HDMI無線視頻發射器和接收器供應商和製造商, 我哋生產最好嘅無線視頻發射器和接收器多年, 我哋得到咗良好嘅聲譽同最好嘅評價.

無線視頻發射機部分知名品牌, 好似黑魔法, 聖地火星 300 400s, 阿松電影眼5g, 烏鴉眼, 志雲, Inkee benbox, 行動技術, CVW SWIFT 800, 大華, iogear, 阿泰克帕特- 225k, 微晶, 尼里乌斯, 泰拉德克.

最佳預算嘅無線廣播視頻發射器和接收器具有好多應用, 適用於4K電視, 閉路電視監控攝錄機, 車載倒車攝像頭, 雲部攝錄機套件, 電池供電, 計數機, 索尼攝錄一體機, 無線視頻會議系統, 佳能數碼單反相機, 冇人機冇人機, 電腦筆記簿電腦, 放映機, in-car, 蘋果手機iPad, 直播, GoPro運動相機, 樹莓派, Xbox.

全高清視頻, 音頻, 數據鏈路最小嘅1080P無線視頻發射器和接收器具有好多輸入和輸出連接器, 好似AV復合CVBS, HDMI, Sdi。, 法國國家石油公司, vga, 通用串口汇流排.

無線視頻發射器TX RX頻率為170-806Mhz, 1.2千兆赫, 2.4g, 5.8g, 最低但非零延遲. 為咗支持更長嘅距離, 功率放大器有10w, 20瓦, 甚至30W.

乜嘢係最好嘅購買FHD無線視頻發射器，價錢平? 它應該考慮您的詳細信息要求, 選擇適當, 不貴, 如果你有任何疑問, 叫滿足 索取報價 形式, 我哋嘅工程師將為您提供解決方案.

5W PA 27 KM long-range wireless video transmitter receiver living demo image data link transmission

用于冇人機攝錄機嘅新型遠程無線視頻發射器和接收器110km 10W PA無線視頻數據音頻鏈路實測

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