로그인회원등록 내글장바구니주문조회현재접속자
 상품 검색








 게시판 검색





 
 
회원등록 비번분실


온라인 입금계좌
ㆍ기업은행
ㆍ219-043192-01-028
ㆍ이건영

      거래은행 바로가기
 
 Sensor Applications
센서 자료실
작성자 leeky        
작성일 2006/02/14
첨부#2 2400mhz_testosc_sch.gif (0KB) (Down:29)
Link#1 2400.html (Down:82)
ㆍ추천: 0  ㆍ조회: 510   
  2400 Mhz test oscillator

G4DMF's 2400 Mhz test oscillator
A 'KISS' APPROACH TO A 2400 OSCILLATOR
FIRSTLY, I CLAIM NO ORIGINALITY FOR THIS PROJECT.
Feel free to duplicate it. If printed or circulated, please  acknowledge the source.

You can find all the circuit ideas used in this project on the internet or in various books.
It is only the way they are connected together that makes it different.
This project was started to satisfy the need for a stable 2400 Mhz signal generator
for testing antennas and down convertors for AO40 mode S.
 
I tried all the normal oscillator - multiplier type of things,
 but all I seemed to achieve were things that had more spurii than I could deal with.
I looked around the internet, in my RSGB and ARRL handbooks, and came up
with this simple generator.
 
The output stripline section is from the RSGB Microwave Handbook.
The total cost should not exceed £10 ( $15) even with all new parts,
chances are that most of us can do a 'full kit' from our junk box.
A well stocked " junk box " is still as vital a part of amateur radio as it's always been,
perhaps even more so with the decline in component suppliers.

There are no critical components, not even the 50Mhz TTL oscilator block.
It will work just as well with a 24Mhz block, and still generate a signal on 2400,
but probably with not quite so much output.

The most common TTL blocks are as follows

20Mhz will give output on 2400 ( and 20Mhz steps up and down )
24Mhz will give output on 2400 ( and 24Mhz steps up and down )
25Mhz will give output on 2400 ( and 25Mhz steps up and down )
33Mhz will give output on 2409 ( and 33Mhz steps up and down )
50Mhz will give output on 2400 ( and 50Mhz steps up and down )

Obviously the most useful are the 25 and 50 Mhz blocks.

Below is the full circuit diagram, I think that everything that you need to know is there.
 L1 is the 100R resistor lead, the 1nF ( 1000pF) capacitor is soldered as close as possible
to the resistor body, and straight down to the earth plane,
you may use a seperate physical piece of wire if you wish, but why bother?
The normal TTL decoupling techniques should be used,
i.e. the 100uF and 10 nF caps are soldered as close as possible to the oscillator block.

The whole unit is feed from a 12V supply and a 7805 regulator,
 I was'nt going to include the circuit for that bit as it is pretty obvious,
but on second thoughts I have put a circuit for it, everyone is a newbie sometime,
and obvious to me may not be obvious to someone else.

Note the inclusion of a series 1N4001, the IDIOT diode,
it is the FIRST component ever connected on my projects,
because even after 30 years of construction,
I still make errors and things can get connected reverse polarity,
semiconductors are the ' fastest fuse on three legs ', and you rarely get a second chance!
If your project is voltage critical, and you can't afford the .7V drop,
then include a fuse and a reverse biased diode ACROSS the supply
( cathode to +ve ) the fuse must be INTERNAL to the unit,
I usually use a .22R fusible resistor.
 
When using lead-acid batteries for power supplies,
because of the high currents that they can deliver,
 it is VITAL that a fuse is used as close as possible to the battery.
The energy that a lead-acid battery is capable of giving,
can and has in the past caused serious fire hazard.

I run the whole thing from a 12V Dryfit battery,
so I can put it at the bottom of the garden as far away as required.
Don't try to set things up indoors, the reflected signals make it
almost impossible to find focal points on dishes etc, I know,
 I tried!! When connected to a simple dipole antenna,
using a Drake with minimal mod's and a 20 turn helix,
the signal is a good S8-9 from 50 to 100 Metres.
 
On my prototype, the BFR90 takes about 25mA, and has about 2.5V on its collector,
so it is running 60 odd mW input as a 48 times multiplier,
 I have absolutely no idea what the actual power output level is,
probably only microwatts, but it's suprising how far microwatts will go.
On my unit the output frequency is only 10Khz or so high,
which indicates that my 50Mhz block is only a few hundred hertz off frequency.
The output tuned line can be altered for any other harmonic output frequency of the block.
It should work OK on higher bands, perhaps with a transistor a bit 'hotter' than the BFR90 though.
 
The whole project is constructed in the well known 'ugly' or 'dead bug' style,
no effort was made make it look pleasing, after all it still works!
The base plate is a piece of single sided fibre glass PCB, copper side in,
the sides and divider are made from tinplate.
 
The whole thing is seam soldered to make a rugged box.
Ground connections are made to the nearest bit of earth plane available.
An N type socket is mounted for the output.
The oscillator block is mounted on the top side. with the pins going through holes in the PCB.
I have put some pictures of the constructed unit at the end of this page.

All the images can be saved by right clicking
on them and selecting 'save as' in IE, similar in Netscape

AVRTOOLS™
   
윗글 PC로 제어하는 AD9850 DDS 신호발생기
아래글 DC BRUSHLESS FANS
    N         제목    글쓴이 작성일 조회 추천
74 AT89C2051과 EM4095를 사용한 RFID 장치의 제작 leeky 2006/12/31 (일) 1253 0
73 UserPort for Windows 2000 leeky 2007/11/12 (월) 869 0
72 아날로그 PID 제어 회로 leeky 2007/11/12 (월) 1461 0
71 Windows Scope 2K4 leeky 2007/11/12 (월) 1007 0
70 12C508 금속검출기 leeky 2006/02/24 (금) 1165 0
69 16C84 LCD표시 L,C 메터 leeky 2006/02/25 (토) 1215 2
68 89C2051 LCD표시 LC메터의 제작 leeky 2006/02/14 (화) 1240 8
67 12C508A 초음파 거리 측정기 avrtools 2006/02/23 (목) 1113 0
66 Caliper to computer (RS-232) interface leeky 2006/02/23 (목) 1155 4
65 가속도센서 ADXL202의 PIC12C508 인터페이스 leeky 2006/02/20 (월) 1096 2
64 16F84 광학식 심박측정기 leeky 2006/02/27 (월) 1180 6
63 12C508 전자 나침판 leeky 2006/02/27 (월) 771 0
62 ENC28J60 Ethernet to SPI Header Board leeky 2007/03/26 (월) 1043 0
61 SHT11 습도센서 8051 인터페이스 leeky 2006/02/14 (화) 1108 0
60 SHT11 습도센서 SX18 인터페이스 leeky 2006/03/16 (목) 751 2
59 SRF04 초음파 거리센서의 제작 leeky 2006/02/25 (토) 787 0
58 Ambient Light Sensors TSL2550 avrtools 2006/04/06 (목) 769 0
57 PIC16F877A BioSense Physiologic Sensing leeky 2006/04/06 (목) 672 0
56 Electrocardiogram (ECG) Front End leeky 2006/04/06 (목) 734 0
55 Biometric Interface Board leeky 2006/04/06 (목) 850 0
54 MAX2242 802.11b 블루투스 RF증폭기 leeky 2006/04/06 (목) 543 0
53 AX.25 9600BPS 무선모뎀 L2PCX leeky 2006/04/06 (목) 438 0
52 TCS230 색상검출 평가키트 leeky 2006/04/06 (목) 1722 0
51 100V10A 50W 전자부하 leeky 2006/04/06 (목) 629 0
50 FLAME SENSOR UVTRON R2868 leeky 2006/04/06 (목) 624 0
49 Compact Optical Image Scanner leeky 2006/04/06 (목) 559 0
48 지자기 방위계 모듈 CMPS03 leeky 2006/04/06 (목) 727 0
47 0~1.5KV 정전기 측정센서 PKE05A1 leeky 2006/04/06 (목) 394 0
46 Rain Sensor 인터페이스 회로 leeky 2006/04/06 (목) 623 0
45 초음파 감지 센서 leeky 2006/04/06 (목) 629 0
44 HUMIDITY SENSOR HS-1100 leeky 2006/04/06 (목) 501 0
43 Relative Humidity Sensor KSH01, KSH-02 leeky 2006/04/06 (목) 384 0
42 Digital Radar Speedometer leeky 2006/04/06 (목) 550 0
41 Touch Sensitive Switch leeky 2006/04/06 (목) 594 0
40 Economy radar detector leeky 2006/04/06 (목) 437 0
39 Twin Loop metal detector leeky 2006/04/06 (목) 563 0
38 Proximity Detector CS209A/D leeky 2006/04/06 (목) 549 0
37 Lego Sound Sensor leeky 2006/04/06 (목) 498 0
36 12C508 IR Proximity Detector leeky 2006/04/06 (목) 713 0
35 Sharp IR Sensor Hack leeky 2006/04/06 (목) 686 0
34 TIL300 PRECISION LINEAR OPTOCOUPLER leeky 2006/04/06 (목) 440 0
33 Analog Opto Isolator leeky 2006/04/06 (목) 485 0
32 Rich Caudle's capaciflector leeky 2006/04/06 (목) 329 0
31 Geiger Tube leeky 2006/04/06 (목) 438 0
30 Lynxmotion Infrared Proximity Detector leeky 2006/04/06 (목) 417 0
29 Low Power LED Flasher leeky 2006/04/06 (목) 492 0
28 백색 LED BLU 구동회로 leeky 2006/04/06 (목) 529 0
27 저전압 백색 LED 구동회로 leeky 2006/04/06 (목) 558 0
26 IR LED 송신회로 avrtools 2006/04/06 (목) 583 0
25 LED 총방사 광량의 측정 leeky 2006/04/06 (목) 458 0
24 자외선 측정센서의 교정 leeky 2006/04/06 (목) 412 0
23 UV센서 S9050의 데이터 leeky 2006/04/06 (목) 325 0
22 디지털 자외선 메터 leeky 2006/04/06 (목) 373 0
21 Simple Metal Detector leeky 2006/04/06 (목) 563 0
20 DS1820 온도센서 읽기 leeky 2006/04/04 (화) 637 0
19 RC5 적외선 리모콘의 신호처리 leeky 2006/02/17 (금) 717 0
18 NEC 적외선 리모콘의 전송규격 leeky 2006/02/17 (금) 634 0
17 MBI-6001 TRANSLESS LED DRIVER leeky 2006/02/14 (화) 444 0
16 PC로 제어하는 AD9850 DDS 신호발생기 leeky 2006/02/14 (화) 484 0
15 2400 Mhz test oscillator leeky 2006/02/14 (화) 510 0
14 DC BRUSHLESS FANS leeky 2006/02/14 (화) 593 0
13 RF mW Meter for SHF (2300MHz) leeky 2006/02/14 (화) 423 0
12 FET로 만드는 400W SSR leeky 2006/02/14 (화) 656 0
11 Scope2k4 소프트웨어 및 하드웨어 회로 leeky 2006/02/14 (화) 782 0
10 LTC1298를 사용한 PC 병렬포트용 ADC leeky 2006/02/14 (화) 441 0
9 0~14V 가변정전압, 0~2A 가변정전류 전원 avrtools 2006/02/14 (화) 569 0
8 ATV 1240-1300MHz 튜너용 PLL leeky 2006/02/14 (화) 324 0
7 1 Transistor FM Microphone leeky 2006/02/14 (화) 378 0
6 Helical Antenna Design Software leeky 2006/02/13 (월) 482 0
5 IRF510을 사용한 7MHz 출력10W 증폭기, PLL leeky 2006/02/13 (월) 559 0
4 MC34063A 설계용 계산기 avrtools 2006/02/13 (월) 515 0
3 RS232 신호 변환회로 leeky 2006/02/13 (월) 661 0
2 Sound card based multimeter Scope leeky 2006/02/13 (월) 802 0
1 2400MHz Helical Antenna Design leeky 2006/02/08 (수) 451 0
1

바구니 : 0
 보관함 : 0
오늘뷰 : 0
HOME   |   회사소개   |   제휴안내   |   회사위치   |   서비스이용 약관   |   개인정보 보호정책   |   사이트맵
17015 경기도 용인시 기흥구 동백중앙로16번길 16-25, 508호. 전화 : 031-282-3310
사업자 등록번호 : 697-47-00075 / 대표 : 이건영 / 업태 : 제조업 / 종목 : LED조명, LED전원, 제어장치.
개인정보 관리책임자 : 홈페이지 관리자 . Copyright ⓒ2016 아크레즈 (ACLEDS INC.)
HOME TOP PREVNEXT 0 0 0