COFDM Transceiver
Cov Lus Qhia
COFDM Transceiver yog dab tsi?
COFDM Transceiver yog ib khub ntawm cov khoom siv uas tuaj yeem tau txais thiab xa tawm cov ntaub ntawv thiab yees duab. COFDM transmitter thiab receiver yog ib ib txoj kev txuas, nws tsuas txhawb unidirectional kis tau tus mob.
COFDM transceiver muaj ob pawg ntawm COFDM transmitters thiab receivers, uas kis nyob rau hauv opposite lus qhia kom ib tug ntaus ntawv tau txais thiab xa cov ntaub ntawv, video, thiab suab rau lwm lub cuab yeej ua ke. Yog li COFDM Transceive yog ib ob-txoj kev kis tau tus mob txuas.
Both COFDM transceiver has ethernet IP RJ45 connectors, nws zoo li ib tug tsis pom net cable. Nws txhawb kev txuas lub koob yees duab IP thiab tseem txhawb nqa txuas ob lub khoos phis tawj deb, nws txhawb kev khiav ping commands ntawm Windows OS CMD, uas yuav tawm tswv yim txog lub sijhawm sib kis.
Yuav xaiv COFDM Transceiver li cas?
Thaum xaiv COFDM transceiver, Tej zaum koj yuav tau xav txog ntau yam:
zaus
COFDM transmitters thiab receivers kis nyob rau hauv ib qho kev taw qhia, yog li tsuas yog ib zaus yuav tsum tau txiav txim siab. COFDM transceivers yog bidirectional kis tau tus mob, yog li ob zaus yuav tsum tau txiav txim siab. Ob qhov ntau zaus yuav tsum tau sib cais kom ntau li ntau tau kom tsis txhob cuam tshuam. Txhawm rau kom tshem tawm kev sib tsoo thiab tsis txhob cuam tshuam, Nws kuj tseem yuav tsum tau txiav txim siab ntxiv cov nthwv dej hla dhau.
Qhov tshwj xeeb ntau zaus tuaj yeem yog los ntawm 170 rau 860 MHz. Piv txwv li, xaiv 300Mhz rau uplink zaus thiab 600Mhz rau downlink zaus.
Qhov kev xaiv tshwj xeeb yuav tsum xav txog qhov xwm txheej nyob hauv zos. Yog tias muaj DVB-T lossis DVB-T2 digital TV hauv cheeb tsam, nws kuj tseem yuav tsum zam cov zaus uas tau xaiv los ntawm digital TV kom ntau li ntau tau.
Tom qab xaiv qhov zaus rau kev sib kis, qhov zaus ntawm tus txais yuav tsum tau khaws cia rau hauv tib qhov ntau kom ua tiav kev sib kis thiab txais tos.
bandwidth
Tsis zoo li digital TV, uas muaj 6, 7, thiab 8Mhz bandwidth, COFDM transceiver's bandwidth tuaj yeem hloov kho, xws li 2MHZ thiab 4MHz.
Fais fab Amplifier
Lub hwj chim amplifier hais ntawm no yog ib qho cuab yeej uas tuaj yeem ua rau lub zog ntawm COFDM teeb liab tso tawm los ntawm lub transmitter., uas tuaj yeem txhim kho cov teeb liab zoo thiab kev pabcuam.
Lub hwj chim amplifier ntawm COFDM transmitter yuav tsum tau tswj cov teeb liab linearity thiab efficiency. feem ntau, xaiv qhov tsim nyog lub zog amplifier raws li qhov kev ncua deb koj xav tau xa mus. Cov hauv qab no yog ib lub rooj sib tham ntawm kev sib kis nrug thiab lub zog amplifier rau koj siv.
| Fais fab Amplifier | LUB | NLOS |
| 500mW | >10Km | <300m |
| 1W | >30Km | <500m |
| 5W | >60Km | <1500m |
| 20W | >120km | <3000m |
| 50W | >200Km | <5000m |
| 100W | >250Km | <10Km |
Neeg
rhiab heev yog hais txog lub peev xwm ntawm lub wireless video transmitter los xa cov cim tsis muaj zog thiab kom lawv tau txais los ntawm tus txais.
rhiab heev yog ntsuas nyob rau hauv decibels (dB) los yog decibel milliwatts (dBm) thiab sawv cev rau theem qis kawg ntawm lub zog hluav taws xob uas lub transmitter tuaj yeem ntes thiab ua tiav.
Qhov siab dua, qhov zoo dua qhov kev ua tau zoo thiab ntau yam ntawm wireless video kis tau tus mob.
Cov khoom ntawm COFDM Transceiver
COFDM feem ntau muaj ob lub COFDM ua haujlwm zaus ntawm 170Mhz txog 860Mhz. Cov frequencies uas tau xaiv yuav tsum sib nrug deb npaum li qhov ua tau kom tsis txhob muaj kev cuam tshuam.
Hauv kev siv tiag tiag, Nws yog ib qho tsim nyog yuav tau ntxiv PA fais fab amplifier, lim, thiab kav hlau txais xov sib piv cov zaus ua haujlwm.
Lub pob ntawm COFDM Transceiver
COFDM transceiver, kuj hu ua Bidirectional COFDM Ethernet Radio, Bidirectional Wireless Ethernet Choj.
Can you customize the frequency 340Mhz and 554Mhz COFDM transceiver for me?
Yog.
Why the two filters per transciever are used? One filter for RX and one PA for TX are enough?
- Filters are added to avoid interfering with or being interfered with by other devices.
Please test the transceiver first without connecting the filter. - 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.
- The receiver add filter allows the receiver to receive only the desired signal and avoid clutter, and that signal sensitivity is improved.
- You need to connect the filter when the transmission distance is not far or the signal strength is very poor in the test.
- 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.
- 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.