COFDM Transceiver

Waa maxay COFDM Transceiver?

COFDM Transceiver waa labo qalab oo heli kara oo diri kara xog iyo muuqaal. COFDM gudbiyaha iyo qaataha waa a Hal wado link, waxa ay taageertaa gudbinta jihada kaliya.

Transceiver COFDM waxa uu ka kooban yahay laba qaybood oo ah gudbiyeyaasha COFDM iyo qaatayaasha, kuwaas oo u kala gudbiya jihooyin iska soo horjeeda si hal qalab uu u helo oo u diro xogta, video, iyo maqalka qalab kale oo lammaane ah. Markaa COFDM Transceive waa a isku xirka gudbinta labada dhinac.

Labada COFDM transceiver waxay leeyihiin xiriiriyaha ethernet IP RJ45, waxay la mid tahay xadhig aan la arki karin. Waxay taageertaa isku xirka kamarada IP waxayna sidoo kale taageertaa isku xirka laba kombiyuutar oo fog, waxay taageertaa socodsiinta amarada ping ee Windows OS CMD, taas oo ka jawaabi doonta wakhtiga gudbinta.

Sida loo doorto COFDM Transceiver?

Markaad dooranayso transceiver COFDM, waxaa laga yaabaa inaad u baahato inaad tixgeliso dhowr arrimood:

Frequency

Gudbiyeyaasha COFDM iyo kuwa qaata waxay u gudbiyaan hal jiho, marka hal jeer oo kaliya ayaa loo baahan yahay in la tixgeliyo. COFDM transceivers waa gudbinta labada dhinac, markaa laba jeer ayaa loo baahan yahay in la tixgeliyo. Labada jeer ee soo noqnoqda waa in la kala saaraa intii suurtagal ah si looga fogaado faragelinta. Si meesha looga saaro qaska iyo ka fogaanshaha faragelinta, sidoo kale waa lagama maarmaan in la tixgeliyo ku darista shaandhada ka gudubka mawjada.

Kala duwanaanshaha soo noqnoqda gaarka ah ayaa laga yaabaa 170 si ay u 860 MHz. Tusaale ahaan, dooro 300Mhz inta jeer ee isku xidhka sare ah iyo 600Mhz inta jeer ee xidhiidhinta hoose.

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, it is also necessary to avoid the frequencies that have been selected by digital TV as much as possible.

After selecting the frequency for transmission, the frequency of the receiver must also be kept in the same range to complete transmission and reception.

bandwidth

Unlike digital TV, kaas oo leh 6, 7, and 8Mhz bandwidth, the COFDM transceiver’s bandwidth can be customized, such as 2MHZ and 4MHz.

Power kordhiyo

The power amplifier mentioned here is a device that can increase the power of the COFDM signal output from the transmitter, which can improve signal quality and coverage.
The power amplifier of the COFDM transmitter needs to maintain signal linearity and efficiency. Guud ahaan, choose the appropriate power amplifier based on the distance you need to transmit. The following is a table of correspondence between transmission distance and power amplifier for your reference.

dareenka

Sensitivity refers to the ability of a wireless video transmitter to transmit weak signals and have them received by the receiver.

Sensitivity is usually measured in decibels (dB) or decibel milliwatts (dBm) and represents the minimum signal power level that a transmitter can detect and process.

The higher the sensitivity, the better the performance and range of wireless video transmission.

Alaabta COFDM Transceiver

COFDM usually has two COFDM operating frequencies from 170Mhz to 860Mhz. The selected frequencies need to be as far apart as possible to avoid mutual interference.
In actual use, it is necessary to add a PA power amplifier, filter, and antenna matching the working frequency.

Xirmada Transceiver COFDM

COFDM transceiver, also named Bidirectional COFDM Ethernet Radio, Bidirectional Wireless Ethernet Bridge.

Ma ii habeyn kartaa inta jeer ee 340Mhz iyo 554Mhz COFDM transceiver?

Haa.

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?