Usambazaji wa Video Isiyo na Waya RF Frequency Digital Down Converter COFDM Uhamisho wa frequency 2.4G hadi 600Mhz BDC ya chini

Digital Down Converter

Usambazaji wa Video Isiyo na Waya RF Frequency Digital Down Converter COFDM Uhamisho wa frequency 2.4G hadi 600Mhz chini

Points kuuza

1. Ingiza masafa kutoka 24000 kwa 600MHz (chini 1800MHz)
2. high Bandwidth
3. kelele za awamu
4. utulivu juu-frequency

vipimo

RF Frequency Range: 2400 Mhz
IF Frequency Range: 600 Mhz
Hasara Return:-12 dB
frequency Usahihi: ± 10 ppm
Kukataa Image: 60 DBC
flatness: ± 0.5 dB (8MHz Bandwidth)
Conversion Gain: 25 dB
Awamu Noise (DBC / Hz)
DBC / Hz @ 1KHz ≤-80
DBC / Hz @ 10KHz ≤-90
DBC / Hz @ 100KHz ≤-100
ugavi Voltage: 10~ 15V
Power sasa: 100 mA
Joto uendeshaji Range: +25 ℃

Port

RF KATIKA: SMA-50K
IF OUT: SMA-50K
Power + 12V: Stick
GND: Soldering lug

Kumbuka

1. Kigeuzi hakihitaji kuongeza amplifier ya kelele ya chini kwenye mwisho wa nyuma.
2. Halisi ya mtihani: kufungwa kitanzi mtihani chini ya mzunguko wa GHz 2.4 / bandwidth 4MHz, unyeti kupokea inaweza kufikia -105dBm.
3. Ingiza frequency inasaidia 1 ~ 3GHz. (Tunaweza kusaidia kubinafsisha).
4. Output frequency supports 300~700MHz. (Tunaweza kusaidia Customize).

About the above video:

Our most popular products are wireless video transmitters and receivers. Hata hivyo, 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. What is an RF frequency digital block-down converter (BDC)?

A RF frequency block downconverter (BDC) for wireless video transmitters is a device that can convert a high frequency range to a low frequency range.

Typically used on the wireless video transmitter side. Kwa mfano,

• From 5.8G to 2.4G down converter
• From 2.4G to 1.2G down converter
• From 1.2G to 600Mhz down converter

This is due to the fact that wireless transmission frequencies in many countries or regions are restricted by local laws and regulations.

It is not permitted to use in a specific frequency range.

To change the operating frequency of the transmitter and receiver, down-conversion or up-conversion is required. Make sure the transmission frequency is in accordance with local laws and regulations.

There is also the case where the professional receiving frequency is fixed, kwa mfano, 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 pembejeo masafa bila haja ya kuwa 2.0Ghz kwa 2.7GHz, need a downconverter to 200 Mhz to 900Mhz. uongofu faida bila walau kuwa 30db si 25dB. Je, hii ingekuwa rahisi kwako kufanya?

Ndiyo, 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.

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

4. Do you have or designed for MMDS applications? kutoka 3400 -3600MHZ, The S-Band is converted to the UHF range 400 kwa 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? kutoka 1,25 GHz to 3.4 GHz?

Thanks for your inquiry. We can customize for you.

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?

swali: 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. Oscillator ya ndani 1800 Mhz.

Ndiyo, Here is our specification for your references.

Frequency Down Converer Block specification sheet

item	vipimo
input frequency	950 MHz ～1550 MHz
output frequency	350 MHz ～850 MHz
Local frequency	1800 MHz
SPAN	500MHz
kelele Kielelezo	≤1.5dB
faida	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
Kiolesura cha RF	SMA-50KFD
ukubwa	108*48*15mm
Power supply mode	Socket power supply

Frequency Up Converer Block specification sheet

item	vipimo
input frequency	350 MHz ～850 MHz
output frequency	950 MHz ～1550 MHz
Local frequency	1800 MHz
SPAN	500MHz
kelele Kielelezo	≤1.5dB
faida	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
Kiolesura cha RF	SMA-50KFD
ukubwa	108*48*15mm
Power supply mode	Socket power supply

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

jibu: 0 dBm

7. I’m searching for a specific down converter, kutumika na kiungo chetu cha OFDM RF.

Natafuta kibadilishaji maalum cha chini, kutumika na kiungo chetu cha OFDM RF:

50ohms RF pembejeo: 1.435 kwa 1.525 GHz

75 ohms IF output: bendi yoyote ya masafa, kati ya 100Mhz na 900MHz

Masafa ya LO inayopendelewa: 1846MHz

Faida ya chini: kuhusu 28dB

Faida ya juu: kuhusu 43dB

DC inayoendeshwa kutoka kwa mlango wa pato wa IF, 12-24safu ya vDC

Ndiyo, we can customize it for you.

DDC ni

Katika usindikaji digital signal, digital chini-kubadilisha (DDC) hubadilisha digitized, mawimbi yenye bendi hadi mawimbi ya masafa ya chini kwa kiwango cha chini cha sampuli ili kurahisisha hatua zinazofuata za redio.. mchakato huhifadhi taarifa zote katika ishara ya awali chini ya yule aliyepotea na makosa huzungusha katika michakato ya hisabati. pembejeo na mazao ishara inaweza kuwa kweli au ngumu sampuli. Mara nyingi DDC waongofu kutoka ghafi radio frequency au mzunguko kati chini ya tata baseband ishara.

Architecture

DDC lina subcomponents tatu: moja kwa moja digital synthesizer (DDS), chini kupita filter (LPF), and a down sampler (ambayo inaweza kuunganishwa katika chini kupita filter). DDS inazalisha sinusoid tata katika mzunguko wa kati (KAMA). Kuzidisha ya mzunguko kati na ishara ya pembejeo inajenga picha unaozingatia katika kiasi na tofauti frequency (ambayo hufuata kutoka kwa sifa za kubadilisha mzunguko wa kigeuzi cha Fourier). The low-pass filters pass the difference (yaani. baseband) frequency wakati kukataa kiasi frequency picha, kusababisha tata baseband uwakilishi wa signal awali. Kwa kuchukua chaguo la busara la IF na LPF bandwidth, tata baseband ishara ya hesabu sawa na ishara ya awali. Katika hali yake ya mpya, it can readily be down-sampled and is more convenient to many DSP algorithms. Kichujio chochote kinachofaa cha pasi ya chini kinaweza kutumika pamoja na MOTO, IIR, na vichungi vya CIC. Chaguo la kawaida ni kichujio cha FIR kwa viwango vya chini vya uharibifu (chini ya kumi) or a CIC filter followed by an FIR filter for larger down-sampling ratios.

Tofauti juu ya DDC

Tofauti kadhaa kwenye DDC zinafaa, ikiwa ni pamoja na mengi ambayo pembejeo maoni signal katika DDS. hizi ni pamoja na:

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, na kusababisha makosa signal huchujwa na kulishwa nyuma katika DDS
2. Costas kitanzi katika ambayo mimi na Q ni mengi na chini kupita kuchujwa kama sehemu ya carrier ahueni BPSK / QPSK kitanzi

utekelezaji
DDCs ni kawaida kutekelezwa katika mantiki katika lango arrays shamba-ya mpango au programu maalum mzunguko jumuishi. Wakati programu ya utekelezaji pia yawezekana, shughuli katika DDS, vizidishio, and input stages of the low-pass filters all run at the sampling rate of the input data. Data hii kwa kawaida kuchukuliwa moja kwa moja kutoka Analog na digital converters (ADCs) sampuli katika makumi au mamia ya 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.

Picha maambukizi downconverter China Shenzhen wasambazaji， Ubinafsishaji wa masafa

jina: Kigeuzi cha chini cha picha
mfano: LWDC-248258I
Kuweka nambari: 1805001
RF +12V IF
jina: RF Down Converter
Model: LWDC-3000I
Model: LWDC-1400
Ingizo la mara kwa mara 2G~2.7G(2000~ 2700Mhz)
Chini: 1800Mhz
Pato la mara kwa mara: 200Mhz-700Mhz
SN2405002

Customize Frequency Specification Sheet Download

OF 1750Mhz Down