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Agilent T echnologies 8494/95/96G/H Attenuators Operating and Service Manual Agilent Pa rt Number: 0849 5-90025 Printed in USA Print Date : August 2004 Supe rsed es: J u ly 200 2.
ii 8494/95/96G/H Operating And Service Manual Notice The infor mation containe d in this document is subj ect to c hange withou t notice. Agilent T echnologi es makes no warranty o f any kind wi th re gard to th is materia l, including, but not li mited to, the implie d warranti es of merchanta bility and fitne ss for a p articul ar purpose .
8494/95/96G/H Operating And Service Manual iii What Y ou’ll Find in This Manual… • Overview , page 1 • Specifi cations , pa ge 6 • Insta llati on , page 10 • Operating I nstructi ons , pag.
iv 8494/95/96G/H Operating And Service Manual Wa r r a n t y Custom syst ems are war rante d by contra ctual agr eement bet ween Agil ent T echnologies and t he customer . Certific ation A gilen t T ec hnol ogies , Inc ., cert ifie s that this p r oduc t m et it s publi she d spec ific at ion s a t the ti me of shipm ent from the facto ry .
8494/95/96G/H Operating And Service Manual v Service and Support Product ma intenance agreement s and other custome r assistanc e agreement s are avai lable f or Agilent T echnolog ies produc ts. Any adj ustment, maintena nce, or repair of this pr oduct must be performed by qualif ied personne l.
vi 8494/95/96G/H Operating And Service Manual Instrument Mark ings Safety Earth Gr ound This is a Safety Cl ass I prod uct (p rovided wi th a prote ctive ea rthing terminal ) .
8494/95/96G/H Operating And Service Manual 1 Overview This manual contain s operati ng instr uction s for the Agilent 84 94G/H, 8495G/H, and 8496G/H at tenuator s. Include d in the man ual is in formation requ ired to insta ll and test th ese at ten u ators .
2 8494/95/96G/H Operating And Service Manual Overview Figure 1 T ypical Four Section At tenuator Sc hematic Diagr am Ta b l e 1 and T able 2 on page 3 an d T able 3 on page 4 show t he typica l switchi ng arrangemen t to increas e the amount of at tenuatio n in an 8494G/H, 8495G/H, or 8496G/H in a linear manner .
8494/95/96G/H Operating And Service Manual 3 Overview T able 2 8495G/H Atte nuator Swit ching Order T able 1 8494G/H Atte nuator Swit ching Order 8494G/H Attenuato r Sections Atte n (dB) 1 1 dB 2 2 dB.
4 8494/95/96G/H Operating And Service Manual Overview T able 3 8496G/H Atte nuator Switchi ng Order Each sole noid requi res a drive of 20 to 30 V wi th a swit ching curr ent of approxima tely 125 mA * at 24 V dc per sectio n. The soleno id switc hing time is less than 20 mi llis ec onds inclu ding sett li ng t ime.
8494/95/96G/H Operating And Service Manual 5 Overview Figu r e 2 T ypica l Sole noid Coil Dr iver C ircu its CA UTION Do not exce ed the RF powe r rating of 1 W averag e or 100 W pe ak with a maximum pulse width of 10 µ s. Do not connect an attenuator RF input or output c onnector t o greate r the ± 7 Vdc.
6 8494/95/96G/H Operating And Service Manual Specifications Specifications Frequency Range and Attenuation Attenuation Acc uracy (±d B): (Refer enced fr om 0 dB) Inst rument Freque ncy Ra nge Atte nu.
8494/95/96G/H Operating And Service Manual 7 Specifications Maximum SWR Maximum Residual Attenuation Attenuati on Repeatability ± 0.01 dB typi cal afte r 5 mil lion cycles RF Power Handling Capabilit.
8 8494/95/96G/H Operating And Service Manual Specifications Solenoid Cable C onnecto r R e fer a lso to Fig ure 3 . Figure 3 Solenoid Cable Pin Conf iguration Section Section 1 Section 2 Section 3 Sec.
8494/95/96G/H Operating And Service Manual 9 Specifications Minimum Life >5 million cycl es per se ction Switching speed Maximum 20 mill iseconds includ ing sett ling time. Environment Limits The instrumen t should be stored i n a clean, dry env ironment.
10 8494/95/96G/H Operating And Service Manual Installation Installation Initia l Inspe ction Inspect the sh ipping con tainer f or damag e. If the s hipping co ntainer or cushioni ng materi al is dama.
8494/95/96G/H Operating And Service Manual 11 Installation Installation Instruct ions The atte nuators may be install ed with or wi thout the base. T he base is removed b y unscrewi ng the t wo filli ster head screws f rom the b ottom of t he base.
12 8494/95/96G/H Operating And Service Manual Operating Instr uctions Operating Instructions CA UTION Do not appl y RF power gre ater tha n 1 W average, or 100 W pea k with a maximum pulse width of 10 microsecon ds. If the se limit s are exce eded, the attenua tors ma y be damaged.
8494/95/96G/H Operating And Service Manual 13 Operating Instructio ns Procedur e 1. Connect equi pmen t as shown in Figur e 4 on pag e 12 with t he at tenu ator set to 0 dB atte nuation.
14 8494/95/96G/H Operating And Service Manual Operating Instr uctions Perfor mance T ests T he ins tru m ent ca n be te ste d to th e ac cu rac y of th e “Specifi cations” on page 6 , wit h an automat ic networ k analyzer or equiva lent equi pment of suita ble ac cur ac y .
8494/95/96G/H Operating And Service Manual 15 Replaceable Parts Replaceable Parts Ta b l e 5 lists the r eplaceab le par ts which ar e the onl y parts t hat can be replac ed without a ccess to the in terior o f the ins trument . If any pa rts not listed belo w nee d repl acem ent, re tur n t he ins trum ent to Agil ent T echnologies.
16 8494/95/96G/H Operating And Service Manual Servi ce Service T r oubleshoot ing T r ouble shoo ti ng con sists of per fo rmin g the “Oper at or’ s Check” on page 12 . If the instrument does no t perfor m within limits, r eturn the instrum ent to Agilent T echnologi es.
8494/95/96G/H Operating And Service Manual 17 Servi ce 4. Close the gap between c oupling n ut wit h the n ut on the exte nded-s leeve connecto r . T o dis connect: 1. Loosen the co upling nut of the con nector showing th e wider gold band. CA UTION Part th e connec tors car efully t o prevent strikin g the i nner conduc tor co ntact.
18 8494/95/96G/H Operating And Service Manual Servi ce CA UTION Do not use aromati c or chlo rinated h ydrocarbon s, esters , ethers, terpenes , higher a lcohols, k etones, or ether -alco hols such a s benzene, t oluen e, turpent ine, dioxa ne, gasoli ne, cel losolve a cetate, o r carbon t etrachlori de.
8494/95/96G/H Operating And Service Manual 19 Servi ce 3. Allow the jaws of th e tool used to cl ose and pul l straight back from t he connecto r without twisting. The contact should co me with the t ool. If not, repe at the pr ocess. Do not reuse th e cont act.
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