Gudbinta Fiidiyowga Wireless RF Inta jeer ee Dijital Down Converter COFDM Soo noqnoqoshada wareejinta 2.4G ilaa 600Mhz BDC hoose

Digital Down Converter

Gudbinta Fiidiyowga Wireless RF Inta jeer ee Dijital Down Converter COFDM Soo noqnoqoshada wareejinta 2.4G ilaa 600Mhz hoose

Points iibinta

1. mawjadaha Input ka 24000 si 600MHz (1800Mhz Hoose)
2. bandwidth Sare
3. qaylada wajiga Low
4. High-noqnoqoshada xasiloonida

faahfaahinta

RF Frequency Range: 2400 Mhz
HADDII Range Frequency: 600 Mhz
Loss noqo:-12 dB
Sugnaantu Frequency: ± 10 ppm
Diidmada image: 60 dBc
Flatness: ± 0.5 dB (8MHz bandwidth)
diinta Gain: 25 dB
Sawaxanka Phase (dBc / Hz)
dBc / Hz @ 1KHz ≤-80
dBc / Hz @ 10KHz ≤-90
dBc / Hz @ 100KHz ≤-100
Supply danab: 10~ 15V
Power hadda: 100 MA
Operating Range Heerkulka: +25 ℃

 

Port

RF IN: SMA-50K
HADDII KA: SMA-50K
Power + 12V: ul
GND: luguhu kabida,

Note

1. Beddeliyuhu uma baahna inuu ku daro cod-weyneeye dhawaq hoose xagga dambe.
2. Imtixaanka dhabta ah: imtixaanka xiran-loop ka yar inta jeer ee 2.4GHz / 4MHz bandwidth, dareenka helay gaari karaan -105dBm.
3. inta jeer Input taageertaa 1 ~ 3GHz. (Waxaan ku caawin karnaa habaynta).
4. Output frequency supports 300~700MHz. (Waxaan taageeri karaan astaysto).

About the above video:

Our most popular products are wireless video transmitters and receivers. Si kastaba ha ahaatee, some clients require modification of the transmission frequency to meet local legal demand, in which case the digital frequency up-down converter block comes in handy. One customer requested that we customize the RF frequency down converter for his 2.4G wireless video transmitter. So the input frequency is 2.4GHz, the output frequency is 600MHz, and the lowdown frequency is 1800MHz. We created the sample in accordance with his specifications. So I showed him a simple video that showed the 2.4G transmitter and 600Mhz receiver working correctly. If you have a similar requirement, such as 1-3G frequency input and 300-700Mhz output, please contact us for a custom solution.

 

Waa maxay DDC

In processing signal digital, a digital hoos-Converter (DDC) badasha si digital ah, calaamad xaddidan oo ku socota calaamadda soo noqnoqda hoose ee heerka muunad hoose si loo fududeeyo marxaladaha raadiyaha ee xiga. Geedi socodka oo dhan wuu ilaaliyaa macluumaadka ku jira signal asalka yar aan tii hallowday in qaladaad soo aruurinta in habka xisaabeed. iyo wixii soo baxayey ayaa calaamadaha noqon kartaa baarka dhabta ah ama kakan. Inta badan DDC ka badasha ka soo noqnoqoshada radio cayriin ama inta jeer dhexe hoos si signal a baseband adag.

Architecture

DDC A ka kooban yahay saddex subcomponents: a synthesizer toos ah digital (DDS), a filter-pass hooseeyo (Lpf), and a down sampler (oo la dhexgelin karaa filter-pass hoose). DDS waxay abuurtaa sinusoid kakan inta jeer ee dhexdhexaadka ah (HADDII). Isku dhufashada ah inta jeer ee dhexe la signal talooyin ku abuurtaa images xuddun at inta jeer ee wadarta iyo kala duwanaanta (kaas oo raacaya sifooyinka isbeddelka soo noqnoqda ee isbeddelka Fourier). The low-pass filters pass the difference (i.e.. baseband) inta jeer halka diidmada image inta jeer tiriya, taasoo keentay in matalaad ah baseband adag of signal asalka. Iyadoo loo qaadanayo doorasho garsoor oo ah IF iyo bandwidth LPF, signalka baseband adag waa xisaab ahaan u dhiganta signal asalka. In qaabka cusub, it can readily be down-sampled and is more convenient to many DSP algorithms. Shaandhooyin kasta oo ku habboon oo hooseeya oo hooseeya ayaa la isticmaali karaa oo ay ku jiraan FIR, IIR, iyo CIC filtarrada. Doorashada ugu caansan waa filtarka FIR ee xaddi yar oo jajab ah (in ka yar toban) or a CIC filter followed by an FIR filter for larger down-sampling ratios.

Isbadalka on DDC ah

Dhawr kala duwanaansho ah oo ku saabsan DDC ayaa waxtar leh, oo ay ku jiraan dad badan oo talooyin signal-celin ah oo wuxuu galay DDS. Kuwaas waxaa ka mid:

1. Decision-directed carrier recovery phase-locked loops in which the I and Q are compared to the nearest ideal constellation point of a PSK signal, iyo signal u baadi keentay la sifeeyo iyo dib u quudiyey galay DDS
2. A loop Costas ah oo aniga iyo Q tarantaan oo aad pass hooseeyo sifeeyo oo qayb ka ah BPSK / QPSK loop kabashada side

hirgelinta
DDCs waxaa inta badan la hirgeliyey macquulka ah ee Arrays iridda field-programmable ama wareeggeedii dhafan codsi gaar ah. Inkasta oo fulintii software sidoo kale waa u suurtoobaan, Howlgalada ee DDS, dhufsada, and input stages of the low-pass filters all run at the sampling rate of the input data. Xogtan waxaa caadi toos ah qaatay ka analog in converters digital (ADCs) tijaabinta tobanaan ama boqolaal MHz. CORDIC is an alternative to the use of multipliers in the implementation of digital down converters.

Here is a client’s customized project, 1300~1400 Mhz input down converter to 300-400Mhz.

gudbinta Picture downconverter China Shenzhen qaybiyaha， Habaynta inta jeer

magac: Sawirka beddelka
model: LWDC-248258I
Tirinta: 1805001
RF +12V HADDII
Magaca: RF Down Converter
Model: LWDC-3000I
Model: LWDC-1400
Soo-gelinta soo noqnoqda 2G ~ 2.7G(2000~2700Mhz)
Hoose: 1800Mhz
Soo-saarka soo noqnoqda: 200Mhz-700Mhz
SN2405002

	MIN	NOOCA	Dhererka Fiilada Fiidiyowga
band inta jeer ee shaqaynaysa (MHz)	1300	–	1400	Xadka soo noqnoqoshada shaqada (MHz)
oscillator maxalli ah (MHz)		1000		oscillator maxalli ah (MHz)
Inta jeer ee dhexdhexaadka ah (MHz)	300	–	400	Inta jeer ee dhexdhexaadka ah (MHz)
Faa'iidada beddelka(dB)	18	20	22	Faa'iidada beddelka(dB)
Dheef-qaadid (dB)		±1	–	Hel flatness(dB)
Sawirka qaylada (dB)		1.5	–	Sawirka Sawaxanka(dB)
Heerka Mawjada Mawjada ee Dekedda taagan VSWR	1.5	1.8	2	Heerka Mawjada Mawjada ee Dekedda taagan VSWR
Xakamaynta Dekedda(Ohm)		50	–	xannibaadda dekedda(Ohm)
Awood gelinta ugu badan (dBm)		-5		Awood gelinta ugu badan (dBm)
Awooda wax soo saarka ugu badan (dBm)		15		Awooda wax soo saarka ee ugu badan (dBm)
danab Working (V)	10	12	15	Korantada shaqaynaysa (V)
Operating hadda (MA)	130	150	180	Hadda shaqaynaysa (mA)
heerkulka Operating (° C)	-25		55	Heerkulka shaqada (°C)
heerkulka kaydinta (° C)	-45		65	Heerkulka kaydinta (C)
Cabbirka mm (iyada oo aan Xidhiidhiyayaasha)		62x32x14mm		Cabbirrada mm (xiriir la'aan)

Customize Frequency Specification Sheet Download

OF 1750Mhz Down

shayga	Halbeegga
input frequency	2100 MHz ～2500 MHz
output frequency	350 MHz ～750 MHz
Local frequency	1750 MHz
Jaantuska Buuq	≤1.5dB
faa'iido	15 dB
Carrier leakage	≤-20dBm
Belt unevenness(8MHz)	≤1.5dB
IIP3:	≥15dBm
maximum input level	0dBm
VSWR	≤1.5
operation temperature	-10～+60℃
voltage current	≤12V/240mA
Interface RF	N-50KFD
size	108*48*22mm
Power supply mode	Online power supply