Digital Down Converter
Wireless Video Transmission RF Frequency Digital Down Converter COFDM Transfer frequency 2.4G to 600Mhz low
Tafole ea likateng
Points rekisa
- Input maqhubu a ho tloha 24000 ho 600MHz (Lower 1800Mhz)
- phahameng kgonothebolo
- lerata tlaase mohato
- botsitso phahameng maqhubu
ga tlhaloso
RF maqhubu Range: 2400 MHz
HAEBA maqhubu Range: 600 MHz
Bohloko ba ho Shoeloa khutla:-12 DB
maqhubu a Nepahetseng: ± 10 ppm
ho khesoa Image: 60 dBc
Flatness: ± 0.5 DB (8MHz kgonothebolo)
ho sokoloha leruo: 25 DB
Phase Noise (dBc / Hz)
dBc / Hz @ 1KHz ≤-80
dBc / Hz @ 10KHz ≤-90
dBc / Hz @ 100KHz ≤-100
phepelo gagamalo: 10~ 15V
matla Current: 100 MA
Mocheso sebelisa mehaho Range: +25 ℃
Port
RF IN: Sma kelas-50K
HAEBA HO: Sma kelas-50K
Matla + 12V: thupa
lakg: kulo lug
Hlokomela
- Mofetoleli ha a hloke ho eketsa amplifier ea lerata le tlaase qetellong ea morao.
- sebele Test: koetsoeng-sekgoqetsane teko tlasa maqhubu a ya 2.4GHz / kgonothebolo 4MHz, ho nahanela fumana ka fihla -105dBm.
- Input maqhubu tshehetsa 1 ~ 3GHz. (Re ka thusa ho Customize).
- Maqhubu a tlhahiso a tšehetsa 300 ~ 700MHz. (Re ka tšehetsa tlwaelanya).
Mabapi le video e ka holimo:
Lihlahisoa tsa rona tse tsebahalang haholo ke li-transmitters tsa video tse se nang mohala le li-receiver. Leha ho le joalo, bareki ba bang ba hloka phetoho ea maqhubu a phetiso ho fihlela tlhoko ea lehae ea molao, moo boemo ba "digital frequency up-down converter block" bo tlang ho sebetsa. Moreki e mong o kopile hore re iketsetse RF frequency down converter bakeng sa transmitter ea hae e se nang mohala ea 2.4G. Kahoo maqhubu a ho kenya ke 2.4GHz, maqhubu a tlhahiso ke 600MHz, 'me maqhubu a tlaase ke 1800MHz. Re entse mohlala ho latela litlhaloso tsa hae. Kahoo ke ile ka mo bontša video e bonolo e bonts'ang mochine oa 2.4G le moamoheli oa 600Mhz o sebetsa ka nepo.. Haeba u na le tlhokahalo e tšoanang, joalo ka 1-3G frequency input le 300-700Mhz tlhahiso, ka kopo ikopanye le rona bakeng sa tharollo ea tloaelo.
FAQs
Sesebelisoa sa RF frequency block downconverter (BDC) bakeng sa li-transmitters tsa video tse se nang mohala ke sesebelisoa se ka fetolang mefuta e mengata ea maqhubu ho ea ho mefuta e tlaase ea maqhubu.
Ka tloaelo e sebelisoa ka lehlakoreng la mohalaleli oa video. Ka mohlala,
- Ho tloha ho 5.8G ho ea ho 2.4G tlase converter
- Ho tloha 2.4G ho 1.2G tlase converter
- Ho tloha ho 1.2G ho isa ho 600Mhz converter e tlase
Sena se bakoa ke taba ea hore maqhubu a phetiso ea waelese linaheng kapa libakeng tse ngata a thibetsoe ke melao le melaoana ea lehae..
Ha e lumelloe ho sebelisoa sebakeng se itseng sa maqhubu.
Ho fetola maqhubu a tshebetso ya transmitter le receiver, phetolo ya tlase kapa ya hodimo-phetoho e a hlokeha. Netefatsa hore maqhubu a phetiso a tsamaellana le melao le melawana ea lehae.
Ho boetse ho na le taba eo ho eona setsebi sa ho amohela khafetsa se tsitsitseng, ka mohlala, pakeng tsa 300-800Mhz.
In order for the transmitter's frequency to be paired, ke tmaqhubu a 1.2G transmitter a tlameha ho fokotsoa.
Sena sohle se hloka tšebeliso ea "frequency downconverter" bakeng sa phetiso ea video e se nang mohala.
E, moenjiniere oa rona oa setsebi o ile a araba, re ka e etsa. Le, pele ho pepa, re tla u bontša video ea liteko.
E, moenjiniere oa rona oa litsebi o tiisa hore re ka qapa bocha le ho fetola likarolo tse ling tsa bohlokoa ho etsa joalo. Ehlile, pele ho pepa, re tla u bontša video ea liteko.
Ke leboha potso ea hau, Ke tla botsa moenjiniere oa rona.
Ke leboha potso ea hau. Re ka u etsetsa tlhophiso.
Ka kopo, re bolelle lintlha tse qaqileng tsa li-module tsa transmitter le receiver.
potso: Re thahasella n.1 downconverter ho tloha 950-1500 Mhz ho 350-850 Mhz le n.1 upconverter ho tloha 350-850 Mhz ho 950-1500 MHz. Oscillator ea lehae 1800 MHz.
E, Mona ke lintlha tsa rona bakeng sa litšupiso tsa hau.
Letlapa le hlalosang Frequency Down Converer Block
ntho |
ga tlhaloso |
makhetlo a ho kenya |
950 MHz - 1550 MHz |
sekhahla sa tlhahiso |
350 MHz - 850 MHz |
Khafetsa ea lehae |
1800 MHz |
nako |
500MHz |
lerata Figure |
≤1.5dB |
fumana |
25 DB |
Carrier leakage |
≤-20dBm |
Ho se leka-lekane ha lebanta(8MHz) |
≤1.5dB |
IP3: |
≥15dBm |
boemo bo phahameng ba ho kenya |
-10dBm |
VSWR |
≤1.5 |
mocheso oa ts'ebetso |
-10+60℃ |
motlakase oa motlakase |
12V/240mA |
RF Interface |
Sma kelas-50KFD |
boholo |
108*48*15limilimithara |
Mokhoa oa phepelo ea matla |
Motlakase oa sokete |
Letlapa le hlalosang Frequency Up Converer Block
ntho |
ga tlhaloso |
makhetlo a ho kenya |
350 MHz - 850 MHz |
sekhahla sa tlhahiso |
950 MHz - 1550 MHz |
Khafetsa ea lehae |
1800 MHz |
nako |
500MHz |
lerata Figure |
≤1.5dB |
fumana |
25 DB |
Carrier leakage |
≤-20dBm |
Ho se leka-lekane ha lebanta(8MHz) |
≤1.5dB |
IP3: |
≥15dBm |
boemo bo phahameng ba ho kenya |
-10dBm |
VSWR |
≤1.5 |
mocheso oa ts'ebetso |
-10+60℃ |
motlakase oa motlakase |
12V/240mA |
RF Interface |
Sma kelas-50KFD |
boholo |
108*48*15limilimithara |
Mokhoa oa phepelo ea matla |
Motlakase oa sokete |
potso: Haeba lets'oao la -25 dbm kena, ke boemo bofe bo nang le tlhahiso e kwahetsweng?
karabo: 0 dBm
DDC ke eng
Ka sebetsa ditsitithale pontšo, e ditsitithale fatše-converter (DDC) fetola e digitized, lets'oao la band-limited ho lets'oao le tlase la maqhubu ka sekhahla se tlase sa sampole molemong oa ho nolofatsa mekhahlelo e latelang ea seea-le-moea.. tshebetso boloka tlhahisoleseding tsohle ka pontšo pele tlase hore eo e lahlehileng ho liphoso bokella ka dithulaganyo le thuto ea lipalo. The input le khumo matšoao a ka ho ba oa sebele kapa rarahaneng disampole. Atisa ho ba DDC fetola ho tloha e tala-le-moea maqhubu kapa maqhubu a lipakeng ho fihlela e rarahaneng baseband pontšo.
Architecture
A DDC na le subcomponents tharo: e ka ho toba a digital Synthesizer (DDS), ka tlase fetisetsana filtara (LPF), le mohlala o tlase (o ka o kopantswe ka tlase fetisetsana filtara). DDS e hlahisa sinusoid e rarahaneng ka maqhubu a mahareng (HAEBA). Le katiso ea maqhubu lipakeng le pontšo input baka litšoantšo setsi sa Balang le phapang maqhubu (e latelang ho tsoa ho makgetlo a ho feto-fetoha ha Fourier transform). Li-filters tse tlaase li fetisa phapang (i.e.. baseband) maqhubu ha a ntse a hana chelete eo maqhubu a setšoantšo, sephetho le ka rarahaneng baseband setšoantšo sa pontšo pele. Ho nka khetho e bohlale ea bandwidth ea IF le LPF, e rarahaneng baseband pontšo e ka dipalo lekanang le a ho pontšo pele. Foromo eona le lecha, e ka ba lisampole habonolo 'me e loketse mekhoa e mengata ea DSP. Sefahla sefe kapa sefe se loketseng sa "low-pass" se ka sebelisoa ho kenyelletsa MOFI, IIR, le li-filters tsa CIC. Khetho e atileng haholo ke filthara ea FIR bakeng sa palo e tlase ea decimation (ka tlase ho tse leshome) kapa filthara ea CIC e lateloang ke filthara ea FIR bakeng sa litekanyo tse kholoanyane tsa mehlala e tlase.
Diphapano ka DDC
Liphetoho tse 'maloa tsa DDC lia thusa, ho akarelletsa le tse ngata tseo input le ditshwaelo tsa pontšo ka DDS. tsena li akarelletsa:
- Li-loops tse notletsoeng tse etselitsoeng qeto ea ho khutlisa, moo I le Q li bapisoang le sebaka se haufi sa linaleli sa lets'oao la PSK., le sephetho le phoso pontšo e tlhotliloeng le fepa khutlela DDS
- A Costas sekgoqetsane seo ke le Q li khaphatseha 'me tlaase fetisetsana e tlhotliloeng e le karolo ea microcyteme hlaphoheloa BPSK / QPSK sekgoqetsane
kenngwa tshebetsong
DDCs ba ho fetisisa ka tloaelo sebediswa ho utloahalang hekeng tse fapaneng tšimo-programmable kapa kopo-itseng lipotoloho setshehetso sa. Ha a ntse a Software implementations hape lia khoneha, tshebetso ka DDS, ngatafatsa, le methati ea ho kenya ea li-filters tsa phallo e tlase kaofela li sebetsa ka sekhahla sa sampole ea data e kentsoeng. ya data ena e ka tloaelo ho nkoa ka ho toba ho tloha analoge ho converters ditsitithale (ADCs) sampole ho mashome kapa makholo a MHz. CORDIC ke mokhoa o mong oa tšebeliso ea li-multiplier ts'ebetsong ea li-converter tsa digital down.
Mona ke morero o hlophisitsoeng oa moreki, 1300~1400 Mhz kenya converter tlase ho 300-400Mhz.
Picture phetiso downconverter China Shenzhen mofani wa thepa, Hangata ho tloaeleha
lebitso: Setšoantšo se theolela tlaase
mohlala: LWDC-248258I
Ho bala: 1805001
RF +12V IF
Name: RF Down Converter
Model: LWDC-3000I
Model: LWDC-1400
Hangata ho kenya 2G ~ 2.7G(2000~ 2700Mhz)
Tlase: 1800MHz
Khafetsa tlhahiso: 200Mhz-700Mhz
SN2405002
MIN | MOFUTA | Reference line switch on/off tshebetso | ||
Sehlopha sa maqhubu a tšebetso (MHz) | 1300 | – | 1400 | Sehlopha sa maqhubu a sebetsang (MHz) |
Oscillator ea lehae (MHz) | 1000 | Oscillator ea lehae (MHz) | ||
Leqhubu la mahareng (MHz) | 300 | – | 400 | Maqhubu a mahareng (MHz) |
Phetoho e fumana phaello(DB) | 18 | 20 | 22 | Phetoho e fumana phaello(DB) |
Fumana Flatness (DB) | ±1 | – | Fumana flatness(dB) | |
Sebopeho sa lerata (DB) | 1.5 | – | Setšoantšo sa Lerata(dB) | |
Karolelano ea Leqhubu la Boema-kepe VSWR | 1.5 | 1.8 | 2 | Karolelano ea Leqhubu la Boema-kepe VSWR |
Port Impedance(Ohm) | 50 | – | boema-kepe(Ohm) | |
Boholo ba matla a ho kenya (dBm) | -5 | Matla a phahameng haholo (dBm) | ||
Matla a phahameng a tlhahiso (dBm) | 15 | Matla a phahameng a tlhahiso (dBm) | ||
sebetsa gagamalo (V) | 10 | 12 | 15 | Matla a sebetsang (V) |
bueloang jwale (MA) | 130 | 150 | 180 | Nako ea ho sebetsa (mA) |
mocheso bueloang (° C) | -25 | 55 | Thempereichara ea ho sebetsa (°C) | |
Storage mocheso (° C) | -45 | 65 | Thempereichara ea polokelo (C) | |
Boemo mm (ntle dikgokelo) | 62x32x14mm | Litekanyo mm (ntle le sehokedi) |
Iketsetse Leqephe la Litlhaloso tsa Khafetsa
ntho | paramethara |
makhetlo a ho kenya | 2100 MHz ~2500 MHz |
sekhahla sa tlhahiso | 350 MHz ~750 MHz |
Khafetsa ea lehae | 1750 MHz |
lerata Figure | ≤1.5dB |
fumana | 15 DB |
Carrier leakage | ≤-20dBm |
Ho se leka-lekane ha lebanta(8MHz) | ≤1.5dB |
IP3: | ≥15dBm |
boemo bo phahameng ba ho kenya | 0dBm |
VSWR | ≤1.5 |
mocheso oa ts'ebetso | -10+60℃ |
motlakase oa motlakase | ≤12V/240mA |
RF Interface | N-50KFD |
boholo | 108*48*22limilimithara |
Mokhoa oa phepelo ea matla | Online power supply |
Reviews
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