Transceiver ya COFDM

What is the COFDM Transceiver?

COFDM Transceiver is a pair of devices that can get and send out data and video. COFDM transmitter and receiver is a njia moja kiungo, it only supports unidirectional transmission.

The COFDM transceiver consists of two sets of COFDM transmitters and receivers, which transmit in opposite directions so that one device can receive and send data, video, and audio to another paired device. So COFDM Transceive is a two-way transmission link.

Both COFDM transceiver has ethernet IP RJ45 connectors, it is like an invisible net cable. It supports connecting an IP camera and also supports connecting two far-way computers, it supports running ping commands at Windows OS CMD, which will feedback on the transmission time.

How to choose a COFDM Transceiver?

When choosing a COFDM transceiver, you may need to consider several factors:

frequency

COFDM transmitters and receivers transmit in one direction, so only one frequency needs to be considered. COFDM transceivers are bidirectional transmissions, so two frequencies need to be considered. The two frequency ranges should be separated as much as possible to avoid interference. In order to eliminate clutter and avoid interference, it is also necessary to consider adding a wave pass filter.

The specific frequency range can be from 170 kwa 860 MHz. Kwa mfano, select 300Mhz for the uplink frequency and 600Mhz for the downlink frequency.

The specific choice should also consider the local frequency occupancy situation. If there is DVB-T or DVB-T2 digital TV in the local area, ni muhimu pia kuepuka masafa ambayo yamechaguliwa na TV ya digital iwezekanavyo.

Baada ya kuchagua mzunguko wa maambukizi, mzunguko wa mpokeaji lazima pia uhifadhiwe katika safu sawa ili kukamilisha maambukizi na mapokezi.

Bandwidth

Tofauti na TV ya kidijitali, ambayo ina 6, 7, na kipimo data cha 8Mhz, kipimo data cha kibadilishaji data cha COFDM kinaweza kubinafsishwa, kama vile 2MHZ na 4MHz.

Power Amplifier

Amplifier ya nguvu iliyotajwa hapa ni kifaa ambacho kinaweza kuongeza nguvu ya pato la ishara ya COFDM kutoka kwa kisambazaji, ambayo inaweza kuboresha ubora wa ishara na chanjo.
Kikuza nguvu cha kisambaza data cha COFDM kinahitaji kudumisha usawa na ufanisi wa mawimbi. Kwa ujumla, chagua amplifier ya nguvu inayofaa kulingana na umbali unahitaji kusambaza. Ifuatayo ni jedwali la mawasiliano kati ya umbali wa usambazaji na amplifier ya nguvu kwa kumbukumbu yako.

unyeti

Unyeti hurejelea uwezo wa kisambaza video kisichotumia waya kusambaza mawimbi dhaifu na kupokewa na mpokeaji..

Unyeti kawaida hupimwa kwa decibels (dB) au decibel milliwatts (dBm) na inawakilisha kiwango cha chini cha nguvu cha mawimbi ambacho kisambaza data kinaweza kugundua na kuchakata.

juu ya unyeti, utendakazi bora na anuwai ya usambazaji wa video zisizo na waya.

The products of COFDM Transceiver

COFDM huwa na masafa mawili ya uendeshaji ya COFDM kutoka 170Mhz hadi 860Mhz. Masafa yaliyochaguliwa yanahitaji kuwa mbali iwezekanavyo ili kuzuia mwingiliano wa pande zote.
Katika matumizi halisi, ni muhimu kuongeza amplifier ya nguvu ya PA, chujio, na antenna inayolingana na mzunguko wa kufanya kazi.

The package of the COFDM Transceiver

Transceiver ya COFDM, Pia inaitwa Redio ya COFDM Ethernet ya pande mbili, Bidirectional Wireless Ethernet Bridge.

Can you customize the frequency 340Mhz and 554Mhz COFDM transceiver for me?

Ndiyo.

Why the two filters per transciever are used? One filter for RX and one PA for TX are enough?

1. Filters are added to avoid interfering with or being interfered with by other devices.
   Please test the transceiver first without connecting the filter.
2. The transmitter adds a filter because it has a power amplifier, It will emit a strong signal to avoid interfering with other equipment on the plane.
3. The receiver add filter allows the receiver to receive only the desired signal and avoid clutter, and that signal sensitivity is improved.
4. You need to connect the filter when the transmission distance is not far or the signal strength is very poor in the test.
5. If the transmitter does not add a filter, it may interfere with the flight control or the power battery. Some customers have encountered this phenomenon before, and the filter has solved the problem.
6. You take the sample now and suggest buying it together when you test it and need the filter, and it will take more time and freight to deliver it.

Can you customize the frequency 175Mhz and 320Mhz COFDM transceiver for me?