Trażmissjoni tal-Vidjo mingħajr Fili Frekwenza RF Konvertitur Diġitali Down COFDM Frekwenza tat-trasferiment 2.4G għal 600Mhz BDC baxx

Diġitali Down konvertitur

Trażmissjoni tal-Vidjo mingħajr Fili Frekwenza RF Konvertitur Diġitali Down COFDM Frekwenza tat-trasferiment 2.4G għal 600Mhz baxx

Punti bejgħ

1. frekwenzi Input minn 24000 li 600MHz (1800MHz Lower)
2. frekwenza għolja
3. istorbju fażi baxx
4. istabbiltà ta 'frekwenza għolja

speċifikazzjoni

RF Frekwenza Medda: 2400 Mhz
JEKK Frekwenza Medda: 600 Mhz
ritorn Telf:-12 dB
Eżattezza frekwenza: ± 10 ppm
Ċaħda Image: 60 DBC
flatness: ± 0.5 dB (8bandwidth MHz)
konverżjoni Gwadan: 25 dB
Storbju fażi (DBC / Hz)
DBC / Hz @ 1kHz ≤-80
DBC / Hz @ 10KHz ≤-90
DBC / Hz @ 100KHz ≤-100
provvista Vultaġġ: 10~ 15V
Power kurrenti: 100 mA
Operattiva Temperatura Medda: +25 ℃

port

RF FL: SMA-50k
JEKK OUT: SMA-50k
Power + 12V: Waħħal
GND: lug Saldjar

Nota

1. Il-konvertitur m'għandux għalfejn iżid amplifikatur ta 'ħoss baxx fit-tarf ta' wara.
2. Test attwali: test ta 'ċiklu magħluq taħt il-frekwenza ta' 2.4GHz / 4MHz bandwidth, is-sensittività jirċievi tista 'tilħaq -105dBm.
3. frekwenza input jappoġġja 1 ~ 3GHz. (Nistgħu ngħinu biex jippersonalizzaw).
4. Output frequency supports 300~700MHz. (Nistgħu appoġġ customize).

About the above video:

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

1. X'inhu konvertitur block-down diġitali ta 'frekwenza RF (BDC)?

A downconverter tal-blokka tal-frekwenza RF (BDC) għal trasmettituri tal-vidjo mingħajr fili huwa mezz li jista 'jikkonverti firxa ta' frekwenza għolja għal firxa ta 'frekwenza baxxa.

Tipikament użat fuq in-naħa tat-trasmettitur tal-vidjo mingħajr fili. Pereżempju,

• Minn 5.8G sa 2.4G 'l isfel konvertitur
• Minn 2.4G għal 1.2G 'l isfel konvertitur
• Minn 1.2G sa 600Mhz 'l isfel konvertitur

Dan huwa dovut għall-fatt li l-frekwenzi tat-trażmissjoni bla fili f'ħafna pajjiżi jew reġjuni huma ristretti minn liġijiet u regolamenti lokali.

Mhux permess li jintuża f'medda ta' frekwenza speċifika.

Biex tibdel il-frekwenza operattiva tat-trasmettitur u r-riċevitur, down-conversion jew up-conversion hija meħtieġa. Kun żgur li l-frekwenza tat-trażmissjoni hija skont il-liġijiet u r-regolamenti lokali.

There is also the case where the professional receiving frequency is fixed, pereżempju, between 300-800Mhz.

In order for the transmitter's frequency to be paired, the frequency of the 1.2G transmitter must be reduced.

All of this necessitates the use of a frequency downconverter for wireless video transmission.

2. My firxa ta 'frekwenza input jeħtieġ li jkunu 2.0Ghz li 2.7Ghz, need a downconverter to 200 Mhz to 900Mhz. Il-qligħ konverżjoni idealment tkun 30db ma 25db. Kieku dan ikun faċli għalik li tagħmel?

Iva, our professional engineer replied, we can do it. And, before delivery, we will show you the test video.

3. Can you make a down converter with LO1G? we need input 1300-1400 Mhz frequency and output 300-400 Mhz.

Iva, our professional engineer confirms that we can re-design and modify some key components to do that. Żgur, before delivery, we will show you the test video.

4. Do you have or designed for MMDS applications? From 3400 -3600MHZ, The S-Band is converted to the UHF range 400 li 600 MHz, LO oscillator is 3000MHZ.

Thanks for your inquiry, I will check with our engineer.

5. What is RF output in dB? Can you make a down converter from 5.8 GHz to 3.1 GHz? Can you make a UP converter? From 1,25 GHz to 3.4 GHz?

Thanks for your inquiry. Nistgħu nippersonalizzaw għalik.

Please tell us the specification details of your transmitter and receiver modules.

6. Would you customize the frequency up-converter block and frequency down-converter block?

mistoqsija: We are interested in n.1 downconverter from 950-1500 Mhz to 350-850 Mhz and n.1 upconverter from 350-850 Mhz to 950-1500 Mhz. Oxxillatur lokali 1800 Mhz.

Iva, Here is our specification for your references.

Frequency Down Converer Block specification sheet

Punt	speċifikazzjoni
input frequency	950 MHz ～1550 MHz
output frequency	350 MHz ～850 MHz
Local frequency	1800 MHz
SPAN	500MHz
Figura istorbju	≤1.5dB
gwadann	25 dB
Carrier leakage	≤-20dBm
Belt unevenness(8MHz)	≤1.5dB
IIP3:	≥15dBm
maximum input level	-10dBm
VSWR	≤1.5
operation temperature	-10～+60℃
voltage current	12V/240mA
Interface RF	SMA-50KFD
daqs	108*48*15mm
Power supply mode	Socket power supply

Frequency Up Converer Block specification sheet

Punt	speċifikazzjoni
input frequency	350 MHz ～850 MHz
output frequency	950 MHz ～1550 MHz
Local frequency	1800 MHz
SPAN	500MHz
Figura istorbju	≤1.5dB
gwadann	25 dB
Carrier leakage	≤-20dBm
Belt unevenness(8MHz)	≤1.5dB
IIP3:	≥15dBm
maximum input level	-10dBm
VSWR	≤1.5
operation temperature	-10～+60℃
voltage current	12V/240mA
Interface RF	SMA-50KFD
daqs	108*48*15mm
Power supply mode	Socket power supply

mistoqsija: If a signal of -25 dbm enter, what level has the coverterd output?

tweġiba: 0 dBm

7. Qed infittex konvertitur 'l isfel speċifiku, biex jintuża mal-link RF OFDM tagħna stess.

Qed infittex downconverter speċifiku, biex jintuża mal-link RF OFDM tagħna stess:

50ohms input RF: 1.435 li 1.525 GHz

75 ohm JEKK output: kwalunkwe medda ta' frekwenza, bejn 100Mhz u 900MHz

Frekwenza LO preferuta: 1846MHz

Qligħ baxx: madwar 28dB

Qligħ għoli: madwar 43dB

DC mħaddma minn port tal-ħruġ IF, 12-24firxa vDC

Iva, nistgħu nippersonalizzawh għalik.

X'inhu DDC

Fil ipproċessar tas-sinjal diġitali, diġitali down-konvertitur (DDC) tikkonverti diġitizzat, sinjal limitat fil-banda għal sinjal ta’ frekwenza aktar baxxa b’rata ta’ kampjunar aktar baxxa sabiex jiġu ssimplifikati l-istadji tar-radju sussegwenti. Il-proċess jippreserva l-informazzjoni kollha fil-sinjal oriġinali inqas dak li tintilef għal żbalji arrotondament fil-proċessi matematiċi. Is-sinjali ta 'input u output jista' jkun kampjuni reali jew kumplessi. Spiss il-DDC tikkonverti mill-frekwenza tar-radju prima jew il-frekwenza intermedja isfel għal sinjal baseband kumpless.

arkitettura

A DDC jikkonsisti fi tliet subkomponenti: synthesizer diġitali dirett (DDS), filtru low-pass (LPF), and a down sampler (li jista 'jiġi integrat fil-filtru low-pass). Id-DDS jiġġenera sinusojdi kumpless fil-frekwenza intermedja (JEKK). Multiplikazzjoni tal-frekwenza intermedja mas-sinjal input toħloq immaġini ċċentrati fuq is-somma u differenza frekwenza (li ġej mill-proprjetajiet li jbiddlu l-frekwenza tat-trasformata ta' Fourier). The low-pass filters pass the difference (jiġifieri. baseband) frekwenza filwaqt li tirrifjuta l-immaġni frekwenza somma, jirriżulta rappreżentazzjoni baseband kumpless tas-sinjal oriġinali. Jekk wieħed jassumi għażla ġudizzjarja ta' bandwidth IF u LPF, -sinjal baseband kumpless huwa matematikament ekwivalenti għas-sinjal oriġinali. Fil-forma l-ġdida tagħha, it can readily be down-sampled and is more convenient to many DSP algorithms. Kwalunkwe filtru pass baxx adattat jista 'jintuża inkluż FIR, IIR, u filtri CIC. L-iktar għażla komuni hija filtru FIR għal ammonti baxxi ta 'decimation (anqas minn għaxra) or a CIC filter followed by an FIR filter for larger down-sampling ratios.

Varjazzjonijiet fuq il DDC

Diversi varjazzjonijiet fuq id-DDC huma utli, inkluż ħafna li l-input sinjal feedback fil-DDS. dawn jinkludu:

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, u s-sinjal żbalji li tirriżulta hija ffiltrata u mitmugħa lura fil-DDS
2. A linja Costas li fiha l-I u Q huma multiplikati u low pass iffiltrat bħala parti minn linja rkupru trasportatur BPSK / QPSK

Implimentazzjoni
DDCs huma l-aktar komunement implimentati fil-loġika fil gate arrays-qasam programmabbli jew ċirkuwiti integrati speċifiċi għall-applikazzjoni. Filwaqt implimentazzjonijiet tas-softwer huma wkoll possibbli, operazzjonijiet fil-DDS, multiplikaturi, and input stages of the low-pass filters all run at the sampling rate of the input data. Din id-data hija komunement meħuda direttament minn analog għal konvertituri diġitali (ADCs) kampjunar f'għexieren jew mijiet ta' 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.

Trażmissjoni ta 'stampa downconverter Ċina Shenzhen fornitur， Personalizzazzjoni tal-frekwenza

isem: Image downconverter
mudell: LWDC-248258I
Numerazzjoni: 1805001
RF + 12V JEKK
isem: RF Down Konvertitur
mudell: LWDC-3000I
mudell: LWDC-1400
Input tal-frekwenza 2G ~ 2.7G(2000~ 2700Mhz)
T'isfel: 1800Mhz
Ħruġ tal-frekwenza: 200Mhz-700Mhz
SN2405002

Customize Frequency Specification Sheet Download

OF 1750Mhz Down