FHSS Frequency-hopping spread spectrum ສໍາລັບຕົວສົ່ງຂໍ້ມູນການເຊື່ອມຕໍ່ວິດີໂອໄຮ້ສາຍ ແລະເຄື່ອງຮັບ

A1: ຄວາມຖີ່ຂອງການແຜ່ກະຈາຍຄວາມຖີ່ (ຮູບແບບນີ້ຖືກອອກແບບມາສໍາລັບການຖ່າຍທອດວິດີໂອແລະຂໍ້ມູນໄຮ້ສາຍທີ່ມີການເຊື່ອມຕໍ່ຂໍ້ມູນໄຮ້ສາຍສອງທາງ) 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.

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.

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

A4:
1. TX900B-2W supports the frequency range is 1420~1530MHz, ແລະມີແບນວິດ 110Mb ທີ່ຈະໃຊ້.

2. ລູກຄ້າສາມາດຕັ້ງແບນວິດເຮັດວຽກເປັນ 1.4M/3M/5M/10M/20MHz. (ຢ່າງໃດກໍຕາມ, 1.4M/3MHz may not be suited for video transmitting). ຫຼັງຈາກນັ້ນ TX900B-2W ສາມາດເຮັດວຽກໄດ້ ໂໝດ FHSS (ຄວາມຖີ່ຂອງການແຜ່ກະຈາຍຄວາມຖີ່) and the system will automatically select the central working frequency and may do frequency hopping (ລະຫວ່າງ 1420-1530MHz) ໃນ​ລະ​ຫວ່າງ​ການ​ເຮັດ​ວຽກ​ຂອງ​ຕົນ​.

3. ລູກຄ້າຍັງສາມາດວາງແຜນທີ່ຈະໃຊ້ຊ່ອງທາງຄວາມຖີ່ທັງຫມົດ 1420 ~ 1530MHz ແລະຕັ້ງອຸປະກອນໃຫ້ເຮັດວຽກຢູ່ໃນຊ່ອງທາງຄວາມຖີ່ຄົງທີ່ເຊັ່ນກັນ..

4. TX900B-2W supports the longest distance at 22km.
ຍົກເວັ້ນໄລຍະຄວາມຖີ່ທີ່ຮອງຮັບ ແລະໄລຍະໄກທີ່ສຸດ, ຮູບ​ລັກ​ສະ​ນະ​ທາງ​ດ້ານ​ຮ່າງ​ກາຍ​, ການໂຕ້ຕອບ, UI, ປະຕິບັດງານ, ແລະອື່ນໆ, TX900B-2W ແມ່ນຄືກັນກັບ TX900B-15km-2W ທີ່ມີຢູ່ແລ້ວ.

5. TX900B-2W only support a frequency range is 1420~1530MHz, ມັນບໍ່ຮອງຮັບ 800MHz ແລະ 2.4GHz ຊ່ວງຄວາມຖີ່.

6. ມີສອງສະບັບ, TX900B-2W-15 ກິໂລແມັດ, ແລະ TX900B-2W-22km.

7. As the TX900B-2W frequency range is 110Mb, ດັ່ງນັ້ນຖ້າທ່ານ config ແບນວິດເຮັດວຽກເປັນ 10Mb, ຫຼັງຈາກນັ້ນ, ທ່ານຈະໄດ້ຮັບ 11 ຊີ້ໃຫ້ເຫັນເຖິງ hopping.

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.

ກະລຸນາກວດເບິ່ງຮູບຂ້າງລຸ່ມນີ້, the blue area is the effective signal, ແລະ the red line is 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. ຖ້າພຽງແຕ່ຜູ້ຮັບດັດແປງຄວາມຖີ່ໂດຍບໍ່ມີການຄວບຄຸມເຄື່ອງສົ່ງເພື່ອດັດແປງຄວາມຖີ່ດຽວກັນ., ຄວາມຖີ່ຂອງເຄື່ອງສົ່ງ ແລະເຄື່ອງຮັບຈະບໍ່ສອດຄ່ອງກັນ ແລະລະບົບສາຍສົ່ງຈະຖືກຂັດຈັງຫວະ..

ເນື່ອງຈາກຄວາມຕ້ອງການຂ້າງເທິງຂອງການແຈ້ງເຕືອນຜູ້ສົ່ງສັນຍານເພື່ອດັດແປງຄວາມຖີ່, ຟັງຊັນ FHSS ຕ້ອງອີງໃສ່ລະບົບສາຍສົ່ງສອງທາງ.

ຫຼື FPV VTX ຂອງທ່ານສາມາດສະຫນັບສະຫນູນການດັດແກ້ຟັງຊັນຄວາມຖີ່ຜ່ານພອດ serial. ເມື່ອທ່ານຕ້ອງການແກ້ໄຂຄວາມຖີ່, ຜູ້ປະກອບການສົ່ງຄໍາສັ່ງພອດ serial ທີ່ກໍານົດໄວ້ກ່ອນຈາກເຄື່ອງຮັບໄປຫາພອດ serial ຂອງເຄື່ອງສົ່ງ. ຫຼັງຈາກໄດ້ຮັບແຈ້ງການຄໍາສັ່ງນີ້, ເຄື່ອງສົ່ງສັນຍານຈະປ່ຽນໄປຫາຈຸດຄວາມຖີ່ຕໍ່ໄປໂດຍອັດຕະໂນມັດ.

ອັນນີ້ເທົ່າກັບອຸປະກອນສາຍສົ່ງໄຮ້ສາຍຂອງເຈົ້າ, 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 ປີ 1886