BIRD 4450 Thruline Wattmeter (1994) WW 电路图.pdf

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1、IN STRUC TION BOOK OP ER ATING IN STRUC TIONS WITH PARTS LIST MODEL 4450 THRULINE WATTMETER RadioFans.CN 收音机爱 好者资料库 LIMITED WAR RANTY All prod ucts man u fac tured by Seller are war ranted to be free from de fects in ma te rial and work man ship for a pe riod of one (1) year, un less oth er wise spe

2、c i fied, from date of ship ment and to con form to ap pli ca ble spec i fi ca tions, draw ings, blue prints and/or sam ples. Sellers sole ob li ga tion un der these war ran ties shall be to is sue credit, re pair or re place any item or part thereof which is proved to be other than as war ranted; n

3、o al low ance shall be made for any la bor charges of Buyer for re place - ment of parts, ad just ment or re pairs, or any other work, un less such charges are au tho rized in ad vance by Seller. If Sellers prod ucts are claimed to be de fec tive in ma te rial or work man ship or not to con form to

4、spec i fi ca tions, draw ings, blue prints and/or sam ples, Seller shall, upon prompt no tice thereof, ei ther ex am ine the prod ucts where they are lo cated or is - sue ship ping in struc tions for re turn to Seller (trans por ta tion-charges pre paid by Buyer). In the event any of our prod ucts a

5、re proved to be other than as war ranted, trans por ta tion costs (best way) to and from Sellers plant, will be borne by Seller and re im burse ment or credit will be made for amounts so ex pended by Buyer. Ev ery such claim for breach of these war ran ties shall be deemed to be waived by Buyer un l

6、ess made in writ ing within ten (10) days from the date of dis cov ery of the de fect. The above war ran ties shall not ex tend to any prod ucts or parts thereof which have been sub jected to any mis use or ne glect, dam aged by ac ci dent, ren dered de fec tive by rea son of im proper in stal la ti

7、on or by the per for mance of re pairs or al ter ations out side of our plant, and shall not ap ply to any goods or parts thereof fur nished by Buyer or ac quired from oth ers at Buyers re quest and/or to Buyers spec i fi ca tions. In ad di tion, Sellers war ran ties do not ex tend to the fail ure o

8、f tubes, tran sis tors, fuses and bat ter ies, or to other equip ment and parts man u fac tured by oth ers ex cept to the ex tent of the orig i nal man u fac turers war - ranty to Seller. The ob li ga tions un der the fore go ing war ran ties are lim ited to the pre cise terms thereof. These war ran

9、 ties pro vide ex clu sive rem e dies, ex pressly in lieu of all other rem e dies in clud ing claims for spe cial or con se quen tial dam ages. SELLER NEI THER MAKES NOR AS SUMES ANY OTHER WAR RANTY WHAT SO EVER, WHETHER EX PRESS, STAT U TORY, OR IM PLIED, IN CLUDING WAR RANTIES OF MER CHANT ABIL IT

10、Y AND FIT NESS, AND NO PER SON IS AU THO RIZED TO AS SUME FOR SELLER ANY OB LI GA TION OR LI A BIL ITY NOT STRICTLY IN AC COR - DANCE WITH THE FOREGOING. RadioFans.CN 收音机爱 好者资料库 IN STRUC TION BOOK OP ER ATING IN STRUC TIONS WITH PARTS LIST MODEL 4450 THRULINE WATTMETER Copy right 1994 by Bird Elec t

11、ronic Cor po ra tion In struc tion Book Part Num ber 920-4450-1 Rev.B THRULINE is a reg is tered trade mark of Bird Elec tronic Cor po ra tion RadioFans.CN 收音机爱 好者资料库 Safety Pre cau tions Safety Pre cau tions The fol low ing are gen eral safety pre cau tions that are not nec es sar ily re lated to a

12、ny spe cific part or pro ce dure and do not nec - es sar ily ap pear else where in this pub li ca tion. These pre cau tions must be thor oughly un der stood and ap ply to all phases of op - er a tion and main te nance. KEEP AWAY FROM LIVE CIR CUITS Op er ating per son nel must at all times ob serve

13、gen eral safety pre cau tions. Do not re place com po nents or make ad just ments in - side equip ment with the high volt age sup ply turned on. To avoid ca su al ties, al ways re move power. DO NOT SER VICE OR AD JUST ALONE Un der no cir cum stances should any per son reach into an en clo sure for

14、the pur pose of ser vice or ad just ment of equip ment ex - cept in the pres ence of some one who is ca pa ble of ren der ing aid. CHEM I CAL HAZ ARD Dry clean ing sol vents used to clean parts may be po ten tially dan ger ous. Avoid in ha la tion of fumes and also pro longed con - tact with skin. R

15、E SUS CI TA TION Per son nel work ing with or near high volt ages should be fa mil iar with mod ern meth ods of re sus ci ta tion. SAFETY SYM BOLS WARNING Warn ing notes call at ten tion to a pro ce dure, which if not cor rectly per formed, could re sult in per sonal in jury. CAU TION Cau tion notes

16、 call at ten tion to a pro ce dure, which if not cor rectly per formed, could re sult in dam age to the in stru - ment. MODEL 4450 THRULINE WATTMETER WARNING STATE MENTS The fol low ing safety warn ings ap pear in the text and are re peated here for em pha sis. WARNING Ex po sure to RF power ra di a

17、 tion and the pos si bil ity of RF shock or burns ex ists with some op er at ing con di tions. Al - ways be sure to turn off trans mit ter when con nect ing or dis con nect ing wattmeter. Be sure trans mis sion line is ter mi - nated into a load or an tenna. WARNING Pro vide ad e quate ven ti la tio

18、n and ob serve nor mal pre cau tions when us ing dry clean ing sol vents. Many dry clean ing agents emit toxic fumes that be harm ful to your health if in haled. Avoid ex ces sive skin con tact or in ha la tion of the fumes when us ing any dry clean ing sol vents. i MODEL 4450 THRULINE WATTMETER CAU

19、 TION STATE MENTS The fol low ing equip ment cau tions ap pear in the text and are re peated here for em pha sis. CAU TION Do not drop the Thruline Wattmeter equip ment or sub mit it to hard blows. The volt me ter cir cuitry or microammeter, even though it is shock mounted, may be dam aged by se ver

20、e im pact. CAU TION Clean the me ter glass only when nec es sary and be care ful not to use an ex ces sive amount of wa ter/de ter gent so lu tion that might drip in side the hous ing and dam age the elec tri cal com po nents. ii About This Man ual About This Man ual This in struc tion book cov ers

21、the model 4450 Thruline Wattmeter This in struc tion book is ar ranged so that es sen tial in for ma tion on safety is con tained in the front of the book. Read ing the Safety Pre cau tions Sec tion be fore op er at ing the equip ment is strongly ad vised. The re main der of this In struc tion Book

22、is di vided into Chap ters and Sec tions. Fig ures and ta bles are num bered se quen tially within each chap ter. At the be gin ning of each chap ter a gen eral over view will be given, de scrib ing the con tents of that chap - ter. OP ER A TION First time op er a tors should read Chap ter 1 - In tr

23、o duc tion, and Chap ter 3 - Prep a ra tion for Use, to get an over view of equip - ment ca pa bil i ties and how to in stall it. An ex pe ri enced op er a tor can re fer to Chap ter 4 - Op er ating In struc tions. All in struc - tions nec es sary to op er ate the equip ment, are con tained in this

24、sec tion. MAIN TE NANCE All per son nel should be fa mil iar with pre ven tive main te nance found in Chap ter 5 - Main te nance. If a fail ure should oc cur, the trou ble shoot ing sec tion will aid in iso lat ing and re pair ing the fail ure. PARTS For lo ca tion of ma jor as sem blies or parts re

25、 fer to the part lists and as so ci ated draw ings in the main te nance chap ter. CHANGES Changes to this pub li ca tion will be made avail able in sup ple ments. To keep your in struc tion book ac cu rate and up to date, it is rec om mended that a pe ri odic re quest of the lat est sup ple ment be

26、made. It will be sup plied at no cost. When re quest ing up - dates, ref er ence your in struc tion book part num ber and its re vi sion level listed on the ti tle page. RE PORTING ER RORS It is our goal to pro vide our us ers with the in for ma tion needed to op er ate and main tain the Thruline Wa

27、ttmeter. If you should dis cover any er rors in this pub li ca tion, or if you have sug ges tions for im prov ing this in struc tion book, please send your com - ments to our fac tory. iii iv Ta ble of Con tents Safety Pre cau tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Model 445

28、0 Thruline Wattmeter Warn ing State ments. . . . . . . . . . . . . i Model 4450 Thruline Wattmeter Cau tion State ments . . . . . . . . . . . . . . ii About This Man ual. . . . . . . . . . . . . . . . . . . . . . . . . . . iii In tro duc tionChap ter 1 Pur pose and func tion. . . . . . . . . . . . .

29、 . . . . . . . . . . . . . 1-1 De scrip tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Per for mance Char ac ter is tics and Ca pa bil ities . . . . . . . . . . . . . . . . 1-1 Power Re quire ments . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Spec i fi ca tions . . .

30、 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Out line Draw ing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Sche matic Di a gram. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 The ory Of Op er a tionChap ter 2 Traveling Wave Con cept . . . . . . . . . . . . .

31、. . . . . . . . . . . 2-1 Traveling Wave vs Stand ing Wave . . . . . . . . . . . . . . . . . . . . 2-1 Cou pling Cir cuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Re flected Power Read ing . . . . . . . . . . . . . . . . . . . . . . . . 2-1 In stal la tionChap ter 3 Por ta bil ity

32、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Con nec tions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Op er ating In struc tionsChap ter 4 Pre lim i nary Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Re verse Power Op er a tion . . . . . . . .

33、. . . . . . . . . . . . . . . . 4-1 Load Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 VSWR Cal cu la tions . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Main te nanceChap ter 5 Gen eral. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Sales / Re pair

34、 Fa cil ities. . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Sales Fa cil ities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Pre ven tive Main te nance. . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Trou ble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . .

35、. . 5-2 Re pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Re move Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Cir cuit Board Re pair or Re place ment . . . . . . . . . . . . . . . . . . . 5-3 Cal i bra tion Board and Me ter Re moval. . . . . . . . .

36、 . . . . . . . . . . 5-3 Range and Mode Switch Re place ment . . . . . . . . . . . . . . . . . . 5-4 Re place ment Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 v List of Fig ures Out line Draw ing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Schematic Di a gram.

37、 . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Zero Ad just ment Screw . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 VSWR Con ver sion Mono graph. . . . . . . . . . . . . . . . . . . . . . . 4-2 vi Chap ter 1 In tro duc tion Purpose and functionThe Model 4450 Thruline Wattmeter i

38、s an in ser tion-type RF wattmeter de signed to mea sure RF power flow and load match in 50 ohm RF co ax ial trans mis sion lines. Its pri mary in tended use is for the test and eval u a tion of power line car rier equip ment, al though it is well suited low fre - quency low power RF ap pli ca tion.

39、 When used in a 50 ohm ap pli ca tion, with N type con nec tors, it has an in ser tion VSWR of less than 1.10 for fre quen cies from 25W and 0 to 100W to cor re spond with the range switch (S-2) set tings. This unit will not only give for ward power in di ca tions with a high de gree of ac cu racy,

40、but also will in di cate re flected power with a turn of mode switch S-1. DescriptionThe Model 4450 Thruline Wattmeter is a por ta ble unit con tained in a formed alu mi num hous ing, with formed sheet alu mi num back clo sure which is eas ily re moved. The unit is equipped with a leather strap for

41、car ry ing, four rub ber shock feet on the base, and four rub ber bump ers on the back, which al low the unit to be used stand ing ver ti cally or hor i zon tally. The me ter is spe cially shock mounted for ad di tional pro tec tion and has a slot ted ad just ment screw on the front face of the me t

42、er be zel for me chan i cal ze ro ing ad just ment. Just be low the me ter on the front face is a mode switch for se lect ing power range or OFF po si tion. On the sides of the unit are the RF con nec tors which are la beled for in put and out put. Performance Characteristics and Capabilities The Mo

43、del 4450 Thruline Wattmeter is ca pa ble of mea sur ing RF power up to 100 Watts in three ranges: 5, 25, and 100 Watts. These power lev els are se lected by ad just ing the range switch and can be used for ei ther for ward or re flected power by ad just ing the mode switch to RFL or FWD po si tion.

44、When check ing re flected power greater res o lu tion can be ob tained by se lect ing a lower power set ting on the range switch. If nec es sary, the in put and out put con nec tions may be re versed with out loss of ac cu racy; how ever, the mode switch will be just the op po site of nor mal set ti

45、ngs, i.e. RFL po si tion will in di cate for - ward power and FWD po si tion will in di cate re flected power. The RF con nec tors are the Quick-Change (QC) type and may changed to other avail able QC types if nec es sary. Power RequirementsThe Model 4450 Thruline Wattmeter has no bat ter ies and re

46、 quires no out side util ity power source for op er a tion other than the RF power to be mea sured. This makes the unit es pe cially suited for mo bile, ma rine, and field use. 1-1 Spec i fi ca tions Im ped ance50 ohms nom i nal Power range5/25/100 Watts In ser tion VSWR1.10 max i mum Con nec torsBi

47、rd QC type, Fe male N nor mally Sup - plied Tem per a ture Range Op er ating Stor age +5C to +45C (41F to 113F) -10C to +45C (14F to 113F) Ac cu racy* (From 5C to 45C) 30 to 535 kHz 20 kHz to 1 MHz (Into a 50 ohm load) 5% of full scale 10% of full scale Di men sions3D x 35364“W x 678”H (76 x 97.2 x

48、175mm) In ser tion Loss0.2 dB max i mum Directivity25 db min i mum Weight2lb (0.91 kg) * On the 5 Watt range only the lower fre quency is 30 kHz for 10% ac cu racy and the am bi ent tem per a ture is lim ited to 15C to 25C for this ac cu racy. Out line Draw ing Bird Model 4450 Thruline Wattmeter 1-2

49、 Sche matic Di a gram - 1-3 Bird Model 4450 Thruline Wattmeter 1-4 Chap ter 2 The ory Of Op er a tion Traveling Wave Concept The op er a tion of the Model 4450 Wattmeter is based on the trav el ing wave con cept of RF trans - mis sion. As RF power is ap plied to a trans mis sion line, there is a for ward wave trav el ing from the trans mit ter to the load, and a re flected wave trav el ing from the load to the trans mit ter. The closer the load is matched to the line, the smaller the re flected wave will be. To de ter mine the watts dis - si pated in the load it is nec es sa