Ұзақ диапазондағы сымсыз бейне таратқыш пен қабылдағыш TX900-10W PA дрон қайталағыш шешімі

repeater model for one-way video data transmission unidirectional

For the one-way COFDM Video Data Transmission repeater, we recommended the model 1886 ж, Which has built-in RX (receive) and TX (transmit) two functions, it can get video and data from your transmitter, and send video and data to your receiver, This module has two frequencies, one frequency is as the receiver frequency, it is the same with your transmitter, another frequency is as the transmitter frequency, it is the same with your receiver.

We also can customize the repeater/relay for you. Кедергіні болдырмау үшін, we also add the two filters, төмендегі суреттегідей.

Repeater/Relay solution for two-way video data transmission bidirectional

TX900-10W PA introduction and solution as the Drone repeater

TX900-10W PA power amplifier supports drone repeater and FHSS function. Let me introduce the details below.

1. TX900 consists of a core modem (Vcan1681, two-way wireless video, and data link module) and a 2-watt, 5-ватт, or 10-watt RF power amplifier inside. (a core modem and 2-watt PA inside picture)

2. There are two versions of the core modem (the same hardware with different Soc firmware): The star wireless network version and the Mesh wireless network version.

Part number	Жиілік диапазоны(МГц)	Network type
K150	1420~1530	Star wireless network version.(P2P, P2MP) It can be used for point-to-point transmitting, point-to-multiple point transmitting, and one-node relay transmitting. The maximum transmitting distance between two points is 150km.
S150	806~826 1427.9~1447.9 2401.5 – 2481.5
MK50	1400~1529.9	Mesh wireless network version. Mesh network mode. The maximum transmitting distance between two points is 50km.
M50	806~826 1427.9~1447.8 2401.5 – 2481.5

Only the same core modem can communicate with each other, different core modems can‘t communicate with each other.

3. 10-Watt RF power amplifier is available for 806~826MHz, 1427.9~ 1447.9MHz, 2401.5 – 2481.5МГц, 1420~12470MHz, 1470~1530 МГц. Сонымен, we can have TX900-10W to work in 806~826MHz, 1427.9~ 1447.9MHz, 2401.5 – 2481.5МГц, 1420~12480MHz, 1470~1530 МГц.

To note, For the 1420~1530MHz band, we need to separate it into two sub-bands (1420~1480MHz, 1470~1530 МГц) since the 10-Watt RF power amplifier can’t support the whole 1420~1530MHz band in the same hardware board.

4. 1.4/3/5/10/20MHz bandwidths configurable, the larger working bandwidth supports more transmitting bitrates in the same condition. For 150km video transmitting, we suggest using 20MHz bandwidth (at least 10MHz).  

5. For TX900-10W(1420~1480MHz) or TX900-10W(1470~1530 МГц), when setting the working bandwidth is 20MHz, it has about 6 central working frequency points; when setting the working bandwidth as 10MHz, it has about 12 central working frequency point;

The central working frequency will hop when it detects frequency noise. If the current working frequency channel is clean, it will not hop. That means the frequency hopping is not as regular as x times/second.

6. There are two solutions for 150km+150km relay transmitting:

  Solution A:

  Solution B:

We suggest solution A since it supports more bitrates transmitting than solution B. It is more reliable on video transmission when the RF signal is weak (low SNR).

On Oct. 25^th, we tested solution B. During the testing, it had little RF noise on the seaside and we can see A Mobile communication base station tower just about 100m nearby.

Signal reporting on the seaside:

We can see the SNR is about 2~4 on the seaside.

Signal reporting on the mountainside:

We can see the SNR is about 4~7 on the mountainside. The different SNRs on the two sides also approved that it had little RF noise on the seaside.

дегенмен, the video was transmitted very fluently with little RF noise.

Star Networking Vs Mesh Networking for Drone or Robot.

STAR Network	MESH Network
Point to Point Connection between nodes	Multi-point to multi-point connection between nodes
Infrastructure based	In Ad hoc mode, devices are autonomous and free to move. In Infrastructure mode, the movement of nodes is restricted around the control center.
Central control point is present	Infrastructure-based will have a control center whereas Ad hoc-based does not have it.
Nodes communicate via the control center.	It is self-configuring.
The central control point is present	Multi hop communication
Devices or nodes can not move freely.	Infrastructure-based will have a control center where as Ad hoc based does not.
Links between nodes and central control points can be configured.	In Ad hoc mode, devices are autonomous and free to move. In Infrastructure mode, the movement of nodes are restricted around the control center.
Nodes communicate via the control center.	Nodes relay traffic to other nodes on the path.

Technical Specification for the Repeater from one client

1. It is required to create an SBus video/data/signal transmission system with a relay station installed on a hexacopter and GC.
2. We need the ability to switch frequencies in the range from 800 МГц дейін 1.4 GHz for SBus data and video transmission (analog and digital with minimal delays).
3. Sector antenna for adjusting the gain of the transmitted/received long-range signal. The ability to work with 5 receiving nodes. Support for Ethernet and UART connections between the repeater on the hexacopter and Ground Control requires a real-time image for the operator. The ability to work with 5 receiving nodes. Support Ethernet and UART connection between helicopter repeater and GC, requires a real-time image for the operator.

For the ground receiver, D1 is a TTL serial port: black is GND, yellow is RX, red is TX
D2 and D3 are Sbus in interfaces: black is GND, yellow is Sbus in, and red is floating.

1. Ground Receiver ( default IP is 192.168.1.13, кіру түйіні)
   D1 is TTL, D2, and D3 are Sbus in (black is GND, yellow is Sbus in, and red is floating);
2. Aircraft Repeater / таңдау бойынша қашықтық дәрежесі ( default IP is 192.168.1.11, орталық түйін, also called relay)
   D1 is TTL, D3 is Sbus out (black is GND, yellow is Sbus out, red is floating), D2 is useless;
3. Unmanned Ship transmitter ( default IP is 192.168.1.12, кіру түйіні)
   D1 is TTL, D2 is Sbus out (black is GND, yellow is Sbus out, red is floating), D3 is useless;

bi-directional optical system for drone li fi, FHSS полудуплекс, коптер-ретранслятором, передача hdmi на 15 километров комплект оборудования, передача hdmi на 15 километров комплект оборудования, OFDM – XP 4000, видео модем для фпв 10 км цифра, передача видео с дрона плаз,

Q: We need 3 terminals 5W 80km for base station and airplane, антенналармен, Base station -> Repeater -> Airplane.

А: Then you need to buy 3 units of the 5W 80km version.

The repeater node is recommended to use 10 Вт, it is the central node, and the key node, 10 watts to ensure the signal is stronger.

It is best to use 10W at the center node. The two front planes to the repeater plane are 80km away. They are all in the sky. The signal will be better. дегенмен, the signal 80km from the repeater plane to the ground station will not be very good, and it is 2D3U. Одан басқа, the data to be transmitted may be relatively large, so the repeater plane is equipped with 10W so that the SNR received by the ground station will be higher and can receive a larger code stream.

This is the 3rd networking type in the below picture.

Considering that the relay is very important in this solution, its data volume is very large and it is a key node for uploading and downloading. We also recommend that you use 5 nodes and two different frequencies, as shown in the figure below.

Contact us for a free solution for your project!