Opanda zingwe Video Kufala RF Frequency Digital Down Converter COFDM Choka pafupipafupi 2.4G kuti 600Mhz otsika BDC

Intaneti Down Converter

Opanda zingwe Video Kufala RF Frequency Digital Down Converter COFDM Choka pafupipafupi 2.4G kuti 600Mhz otsika

Mfundo kugulitsa

1. Lowetsani mafurikwense ku 24000 kuti 600MHz (m'munsi 1800Mhz)
2. mkulu bandiwifi
3. phokoso Low gawo
4. kukhazikika High-pafupipafupi

mfundo

RF pafupipafupi manambala: 2400 MHz
NGATI pafupipafupi manambala: 600 MHz
Loss Bwererani:-12 DB
pafupipafupi Zowona: ± 10 ppm
Akukana Image: 60 dBc
Flatness: ± 0.5 DB (8MHz bandiwifi)
kutembenuka Dziwani: 25 DB
gawo Phokoso (dBc / Hz)
dBc / Hz @ 1KHz ≤ 80
dBc / Hz @ 10KHz ≤ 90
dBc / Hz @ 100KHz ≤ 100
Wonjezerani Voteji: 10~ 15V
mphamvu Current: 100 MA
Kutentha opaleshoni manambala: +25 ℃

 

Port

RF MU: SMA-50K
NGATI KUTI: SMA-50K
Mphamvu + 12V: ndodo
GND: Soldering lug

Zindikirani

1. Wotembenuzayo safunikira kuwonjezera amplifier otsika-phokoso kumapeto kumbuyo.
2. leni Mayeso: chatsekedwa-kuzungulira mayeso pansi pafupipafupi 2.4GHz / bandiwifi 4MHz, tilinazo kulandira angafikire -105dBm.
3. Lowetsani pafupipafupi amathandiza 1 ~ 3GHz. (Titha kuthandiza makonda).
4. Output frequency supports 300~700MHz. (Titha kuthandiza ikonza).

About the above video:

Our most popular products are wireless video transmitters and receivers. Komabe, 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.

 

DDC Kodi

Mu processing digito mbendera, ndi digito pansi-Converter (DDC) Amasandutsa digitized, band-limited sign to low frequency siginali pamlingo wotsikirapo wa zitsanzo kuti muchepetse magawo otsatirawa a wailesi. Dongosololi kusungabe nkhani zonse mu mbendera choyambirira zochepa chotayikacho zolakwa nazo mu njira masamu. Athandizira ndi linanena bungwe chizindikiro angakhale weniweni kapena zovuta zitsanzo. Kawirikawiri DDC otembenuka kuchokera yaiwisi wailesi pafupipafupi kapena pafupipafupi wapakatikati pansi ndi zovuta baseband mbendera.

zomangamanga

A DDC tichipeza subcomponents atatu: lachindunji digito synthesizer (DDS), wozama chikudutsa fyuluta (LPF), and a down sampler (amene akhoza Integrated mu otsika-chiphaso fyuluta). DDS imapanga sinusoid yovuta pafupipafupi (NGATI). Chulutsa pafupipafupi wapakatikati ndi chizindikiro athandizira amalenga zithunzi zokha pa ndalama ndi kusiyana pafupipafupi (zomwe zimatsatira kusinthasintha kwafupipafupi kwa kusintha kwa Fourier). The low-pass filters pass the difference (i.e.. baseband) pafupipafupi pokana ndalama pafupipafupi chifaniziro, chifukwa mu zovuta baseband chizindikiro cha mbendera original. Kungoganiza kusankha mwanzeru kwa IF ndi LPF bandwidth, zovuta baseband mbendera ndi mwamasamu zofanana ndi chizindikiro original. Maonekedwe atsopano, it can readily be down-sampled and is more convenient to many DSP algorithms. Sefa iliyonse yoyenera yotsika imatha kugwiritsidwa ntchito kuphatikiza MOTO, IIR, ndi zosefera za CIC. Chosankha chodziwika bwino ndi fyuluta ya FIR yotsika pang'ono (osakwana khumi) or a CIC filter followed by an FIR filter for larger down-sampling ratios.

Kusiyana pa DDC

Zosiyanasiyana zingapo pa DDC ndizothandiza, kuphatikizapo ambiri amene athandizira ndi maganizo chizindikiro mu DDS. zikuphatikizapo:

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, ndi chifukwa zolakwa mbendera ndi osasankhidwa ndi kudyetsedwa kumbuyo mu DDS
2. A Costas kuzungulira imene ine ndi Q akuchulukitsidwa ndi otsika chikudutsa osasankhidwa mbali ya nthandala kuchira BPSK / QPSK kuzungulira

kukhazikitsa
DDCs amapezeka kawirikawiri akuyendera mfundo pachipata magulu kunja programmable kapena ntchito pokha madera Integrated. Ngakhale mapulogalamu implementations komanso zitheka, ntchito mu DDS, ochulukitsa, and input stages of the low-pass filters all run at the sampling rate of the input data. deta ichi ambiri itsegu- kwa analogi kuti converters digito (ADCs) sampuli pa makumi kapena mazana a 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.

Chithunzi kufala downconverter China Shenzhen katundu， Kusintha pafupipafupi

dzina: Image downconverter
chitsanzo: LWDC-248258I
Kuwerengera: 1805001
RF +12V IF
Name: RF Down Converter
Model: LWDC-3000I
Model: LWDC-1400
Kulowetsa pafupipafupi 2G ~ 2.7G(2000~ 2700Mhz)
Pansi: 1800MHz
Kutulutsa pafupipafupi: 200Mhz-700Mhz
Mtengo wa SN2405002

	MIN	TYPE	Malo omvera
Bandi yogwira ntchito (MHz)	1300	–	1400	Ma frequency band (MHz)
Oscillator wamba (MHz)		1000		Oscillator wamba (MHz)
Mafupipafupi apakatikati (MHz)	300	–	400	Ma frequency apakati (MHz)
Kutembenuka kumapeza Phindu(DB)	18	20	22	Kutembenuka kumapeza Phindu(DB)
Pezani Flatness (DB)		±1	–	Pezani flatness(dB）
Chithunzi chaphokoso (DB)		1.5	–	Chithunzi cha Phokoso(dB）
Port Standing Wave Ratio VSWR	1.5	1.8	2	Port Standing Wave Ratio VSWR
Port Impedans(ohm)		50	–	port impedance(ohm)
Mphamvu zolowetsa zambiri (dBm)		-5		Mphamvu zolowera kwambiri (dBm)
Mphamvu yochuluka yotulutsa (dBm)		15		Mphamvu zazikulu zotulutsa (dBm)
ntchito voteji (V)	10	12	15	Mphamvu yamagetsi (V)
opaleshoni panopa (MA)	130	150	180	Panopa (mA)
kutentha opaleshoni (° C)	-25		55	Kutentha kwa ntchito (°C)
yosungirako kutentha (° C)	-45		65	Kutentha kosungirako (C)
Dimension mm (popanda zolumikizira)		62x32x14mm		Makulidwe mm (opanda cholumikizira)

Customize Frequency Specification Sheet Download

OF 1750Mhz Down

katunduyo	chizindikiro
input frequency	2100 MHz ～2500 MHz
output frequency	350 MHz ～750 MHz
Local frequency	1750 MHz
phokoso Chithunzi	≤1.5dB
phindu	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
RF Interface	N-50KFD
kukula	108*48*22mamilimita
Power supply mode	Online power supply