Agilent Technologies 54621D manuale d’uso

Service Guide Publication Number 5 4622-97037 December 2 002 For S afety Inf ormati on, W arranti es, and Reg ulator y inf orma tion , s ee t he pa ges at t he end of this book . © Copyright Agilent T echnolog ies 2000, 2002 All Righ ts Rese rved Agilent 54621A/22A/24A Oscill oscope and Agilent 54621D/22D Mixed-Signal Oscilloscope service.book Pag[...]

ii The Oscilloscope At a Glance Choose from a variety of oscilloscope s for capturing long , non -re peat ing s igna ls with 200 MSa/s sample rate and 2 MBytes of MegaZo om deep memory per channel. • Agilent 54621A - 2-channel, 60-MHz bandwidth • Agilent 54621D - 2-c hannel +16 logic channel s, 60- MHz ba ndwidt h • Agilent 54622A - 2-channel[...]

iii In This Book This book provide s the service inform ation for the Agi lent 54 621A/22A/24 A Oscillosco pe and t he Agilen t 54621 D/22D Mix ed-Signal Oscillo scope. This manua l is divi ded in to t hese chapt ers: Chapter 1 provid es ge neral informa tion and s p ecific atio ns. Chapter 2 shows you how to prep are the osci llosc ope for use. Ch[...]

Contents Contents-1 1 General Inf ormation To insp ect pac kage con tents 1- 3 To i nspect opti ons a nd acces so ries 1- 6 Performance Characteristic s 1-9 2 Prepa ring the O scill oscope for Use Setting up the Oscilloscope 2-3 To adjus t the handle 2- 4 To po wer- on the osci llosc ope 2-5 To adjus t the displ ay in tensit y 2-6 To co nnect the o[...]

Cont ents Contents-2 4 Calibrating and Adjusting To ad just t he pow er sup ply 4-4 To per form Us er Cal 4-7 To ad just t he os cillosc ope di splay 4-8 5 Troubleshooting Solving Gene ral Problems wi th the Oscill oscopes 5-3 If ther e is no t race dis play 5- 3 If t he tr ace dis play is unu sual or u nexpect ed 5-4 If you cannot s ee a c hannel [...]

1 General Info rmation service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

1- 2 General Information This chapter li sts general i nformation for the Agilent 5462 0-series Oscilloscop es. It also incl udes performance characteristics and specifications for the oscilloscopes. service.book Page 2 Wednes day, December 18, 2002 8:35 AM[...]

1- 3 General Informati on To inspect package contents ❏ Inspect th e shippin g contai ner for dam age. If y our shipping con tainer appears to be damag ed, keep the shippin g con tainer or cu shion ing materi al un til yo u ha ve in spect ed th e conte nts of the shipment for compl eteness and h ave checke d the o scill osco pe mec han icall y an[...]

1- 4 General Informati on • Agilent In tuiLink Data Capture (f or 54622A , 22D, or 24A) IntuiLink Dat a Capture is a standal one program for downl oading waveform data from th e os cillos copes t o your PC via GPIB or RS -232 in terf ace. It provides t he c apability t o t ransfer deep m emory da ta out of the osci lloscope , allowing u p to 4MB [...]

1- 5 General Informati on Figure 1-1 Package contents for 54620-Series Oscilloscopes s s1 10074C P robes Power cord Access ories p ouch an d fron t-pan el cover ** 5462 0-61801 16-chan nel ca ble* ** 5959-9334 2 ” P robe groun d lea d (qt y 5) 5090-4833 G rabbe r (qty 20 ) IntuiL ink for 5460 0-series soft ware , Data C aptur e softwa re and s er[...]

1- 6 General Informati on To inspect options and accessories ❏ Verify tha t you re ceived the option s and acce ssories you orde red and th at none were d amaged. If an ythin g is missin g, contact your neare st Agilent Sales Offic e. If the shipmen t was dama ged, or th e cush ionin g mate rials s how sig ns of stre ss, notify the carr ier and y[...]

1- 7 General Informati on T able 1-2 Accessori es available Model Descrip tion 01650-61607 16:16 logic cable a nd te rminator (for use wit h 54621D /22D) 54620-68 701 16:2 x 8 logic in put prob e assemb ly (ship ped stan dard wit h 54621D/ 22D) 1146A 100 kHz curren t probe, a c/dc 1183A Testmob ile scope ca rt 1185A Carrying case 1186A Rackmou nt k[...]

1- 8 General Informati on T able 1-3. Power Cords Plug Type Cable P art Numbe r Plu g Type Cable P art Number Opt 900 (U.K.) 8120-1703 Opt 918 (Japan ) 8120-47 54 Opt 901 (Austral ia) 8120-0696 Opt 919 (Israel) 8120-6799 Opt 902 (Europe ) 8120-1692 Opt 920 (Argenti na) 8120-6871 Opt 903 (U.S.A .) 8120-1521 Opt 921 (Chile) 8120-6979 Opt 906 (Switzer[...]

1- 9 General Informati on Acquisit ion: Ana log Chan nels Perfo rmance Ch aract e ris tics * Deno tes War rante d Sp ecif ica tions, all othe rs a re typica l. Spe cific atio ns a re v alid afte r a 30-m inute warm -up perio d an d ±10 ° C fr om fi rmware cali bra tion te mper ature . Acquisition: Analog Channels Max Sampl e rate 200 MSa/ s Max M[...]

1- 10 General Informati on V ertical Sy stem: Analog Channe ls Vertic al System : Anal og Chan nels Analo g channel s 54621A/ 21D, 5462 2A/2 2D: Ch1 an d 2 simult aneou s acquisi tio n 54624A: C h 1, 2 , 3, and 4 simu ltan eous acqu isiti on Bandwi dth (-3dB )* 54621A/ 22D: dc t o 60 MHz 54622A/ 22D/24 A: dc to 100 MH z ac coupl ed 54621A/ 21D: 3.5[...]

1- 1 1 General Informati on V ertica l S y stem : Ana log Chan nel s (c ont inue d) Vertic al System: Analog Channel s (con tinued) ESD T olera nce ±2 kV Nois e Peak-t o-Pe ak 2% full sc ale or 1 m V, which e ver is gr eater Comm on Mo de Reject ion Rat io 20 dB @ 50 MHz DC Ve rtic al G ain Ac cura cy* 1 ±2.0% full scale DC Verti cal Offset Ac cu[...]

1- 12 General Informati on Horizo ntal Horizo ntal Rang e 5 ns/ div to 50 s/di v Resolu tion 25 p s Vern ier 1-2-5 increments when off, 25 mi nor i ncrem ents betwee n major se tting s whe n on Refer ence Posit ion s Lef t, Ce nter, Righ t Delay Rang e Pre-t rigger (n egativ e de lay) Post -trigg er (positi ve de lay) Great er of 1 scree n width or[...]

1- 1 3 General Informati on Tr i g g e r S ys t e m Trigge r System Sources: 54621A/ 22A: Ch 1 , 2, line, ext 54621D/ 22D: Ch 1, 2, li ne, ext, D1 5 - D0 54624A: Ch 1, 2, 3, 4, line, ext Modes A uto , Auto leve l, Tr igger ed (nor mal), Sing le Holdoff Ti me ~60 ns to 10 se conds Sele ction s Edge, Patter n, P ulse W idth, CAN, D urati on, I 2 C, S[...]

1- 14 General Informati on Analog Channe l T rigge ring Analog Channe l Tr iggering Range (Interna l) ±6 div from center sc reen Sen sitiv ity* Grea ter of 0.35 div or 2. 5 mV Coupli ng AC (~3 .5 Hz), DC, no ise rej ect, HF re ject an d LF rej ect (~ 50 kHz) Digital (D15 - D0) Channel Triggering (54621D and 5462 2D) Thresh old R ange (us er- defin[...]

1- 1 5 General Informati on Display Sy stem Display System Displa y 7- inc h ras ter m onoch rome CRT Throu ghput of Anal og Chann els 25 million gray scal e vect ors/s ec per channel Resol ution 255 ve rtical by 1000 h oriz ontal p o ints (wavef orm area) 32 lev els of g ray scale Control s Waveform i ntensi ty on fr ont panel Vectors on/off; infi[...]

1- 16 General Informati on FF T FFT Point s Fixed at 2048 point s Source of FFT Analog ch annels 1 or 2 (or 3 or 4 for 54624A), 1+2, 1-2, 1*2 Window Rect angul ar, Fla tt op, Ha nnin g Nois e Floor -70 to -100 dB depend ing on avera ging Amplit ude D ispl ay In dBV Frequenc y Resoluti on: 0.097656 /(time pe r div) Maxim um Freque ncy 102.4/(time pe[...]

1- 1 7 General Informati on General Characteristic s General Charac teristi cs Physica l: Size Weig ht 32.2 6 cm wide x 17.27 cm h igh x 31.75 cm de ep (wi thout handle) 6.35 kgs ( 14 lbs) Cali brato r Output Freque ncy ~1.2 k Hz; A mplitu de ~5 V Trigge r Out 0 to 5 V with 50 Ω source i mpeda nce; del ay ~ 55 ns Printer Power 7.2 to 9 .2 V, 1 A [...]

2 Prep arin g th e Osc illo scope for Use service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

2- 2 Preparing the Oscilloscope for Use To prepare your oscillosco pe for use, you need to do the following tasks. A f t e r y o u h a v e c o m p l e t e d t h e m , y o u w i l l b e r e a d y t o u s e t h e o s c i l l o s c o p e . In the follo wing topics y ou will: • adjust the handl e • power-on the oscillo scope • adjust the disp lay[...]

2- 3 Setting up the Oscillo scope Aft er you h ave do ne a fe w b asic ta sk s, yo u w il l co nn ect pr ob es to th e oscilloscop e. The number of probes, and the type of probes that you will use depends on the oscilloscope model that you have. • When usin g the Agilent 54621A an d 54622 A 2-chan nel Osc illoscopes , and the Agilent 54624A 4-ch [...]

2- 4 Prepa rin g the O scill osc ope f or Use T o adjust the ha ndle To adjust the handle 1 Grasp the ha ndle pivot points on ea ch side o f the instrument and pull the pivo t o ut u nt il it st ops . 2 Without releasi ng t he pivots, swivel the handle to the desired position. Then release the pivots. Continue pivoting the handle until it clicks in[...]

2- 5 Prepa rin g the O scill osc ope f or Use T o p owe r-on the os cill osco pe To power-o n the oscilloscope 1 Connect the power cord to t he rear of the oscilloscope , then to a suitabl e ac voltag e source. The osci llosc ope power supply automa tically adj usts for input line voltages in the range 100 to 240 V AC. Therefore , you do not need t[...]

2- 6 Prepa rin g the O scill osc ope f or Use T o adjust the disp lay intensit y To adjust the display intensity The I nte nsity control is at th e low er l eft c orner of the f ront pan el. • To decre ase display intensity, rotate t he Intensit y contr ol counter- clockwise. • To increas e displa y intensit y, rotate t he Intensi t y control c[...]

2- 7 Prepa rin g the O scill osc ope f or Use T o connect the osc illoscop e probes To connect the oscillosco pe probes 1 Connect t he Agilent 10074C 1.5-mete r, 10:1 osc illoscope probe to the analog channe l 1 or 2 BNC connector input on the oscil loscope, or channel 1 t hrough channe l 4 on th e 54624A. Maximum input volt age for analog inputs: [...]

2- 8 Prepa rin g the O scill osc ope f or Use T o use the d igital pr obes (mixe d-signal oscilloscope only) To use the digital probes (mi xed-signal oscill oscope only) 1 If you feel it’s necessary, turn off the power supply to the circuit under test. T urning of f po wer t o the circuit u nder test w ould only preve nt da mage t hat might occur[...]

2- 9 Prepa rin g the O scill osc ope f or Use T o use the d igital pr obes (mi xed-signal oscillosco pe only) 3 Connect a grabber to one of the p robe leads. Be sure to co nnect the ground lead. (Other probe leads are omitted from the figure for clarity.) 4 Connect t he grabber t o a node in the circui t you want t o test. Grab ber service.book Pag[...]

2- 10 Prepa rin g the O scill osc ope f or Use T o use the d igital pr obes (mixe d-signal oscilloscope only) 5 For hi gh-speed signals, connect a ground lead to the probe lead, connect a grabb er to the gr ound lead, and at tach the gra bber to ground in the circuit under te st. 6 Connect t he ground lead on each set of channels, using a probe gra[...]

2- 1 1 Prepa rin g the O scill osc ope f or Use T o use the d igital pr obes (mi xed-signal oscillosco pe only) 7 Repeat steps 3 through 6 until you have connected all points of interest. 8 If you need to remove a probe lead fr om the cabl e, insert a paper clip or other s mall poin ted object i nto the side of the cable assembly, and push to rel e[...]

2- 12 Prepa rin g the O scill osc ope f or Use T o connect a printer To connect a printer The o scill oscope co nne cts t o a pa ralle l pr inter thro ugh the Pa rall el out put connec tor on the rear of the oscil losc ope. Y o u will need a parallel print er cable to connec t t o the p rinter . 1 Attach the 2 5-pin small “D” conn ector to the [...]

2- 1 3 Prepa rin g the O scill osc ope f or Use T o verify basic oscillo scope operation To verify basic osci lloscope ope ration 1 Connect a n oscilloscope pr obe to channel 1. 2 Attach the probe to the Probe Comp output on the lower- right side of the front panel of the oscillos cope. Use a prob e re trac tabl e hoo k tip so you do n ot need to h[...]

2- 14 Getting started using t he oscilloscope interface When the oscilloscope i s first turned on, it performs a self -test, then momentarily sho ws a startup screen as shown below. This menu i s only acces sible w hen th e osc illosco pe fi rst sta rts u p. service.book Page 14 Wednesday, Dece mber 18, 2002 8:35 AM[...]

2- 1 5 Prepa rin g the O scill osc ope f or Use T o verify basic oscillo scope operation •P r e s s t h e Getting Started s oftke y to v iew the sy mbo ls u sed in th e oscill oscope softkey menus. Use th e En try knob labele d to ad just th e par ameter . Pres s the so ftke y to displ ay a po p up with a li st of c hoice s. Repe atedl y press th[...]

2- 16 Using Quick Help The oscilloscope has a Quick Help system that provides use r help for each front-pane l key and softkey on the oscilloscope. T o view Quick Help information : 1P r e s s and hold down t he key for whic h you would like to view help. 2 Releas e the key aft er read ing the messag e. Releasing the key r eturns the oscil loscope [...]

2- 1 7 Prepa rin g the O scill osc ope f or Use Sel ect ing a la ngu age for Qu ick Help af ter you hav e been op erat ing th e os cil losc ope Selecting a language for Qui ck He lp a fter you have been operating the oscilloscope 1P r e s s t h e Uti lity key, the n press the Language softkey t o displa y the Language menu. 2P r e s s t h e Languag[...]

2- 18 Prepa rin g the O scill osc ope f or Use Loading a lan guage f rom fl oppy disk Loading a language from floppy disk Language files can be d ownloaded from www .agile nt.com/find /5462xsw or call an A gilent cent er an d re quest a languag e dis k for your inst rument . 1 Inser t t he floppy disk wit h a language file into the fl oppy disk dri[...]

2- 1 9 Cleaning the oscilloscope 1 Disconnect power from the instrument. CAUTION Avoid Damage to Sensitive Electron ic Component s! Do not use too much liquid in cle aning the oscilloscop e. Water can enter the front-panel k eyboard, cont rol knobs, or floppy disk dam aging sensitive elect ronic com ponent s. 2 Clean the oscillosc ope with a soft c[...]

3 Testing Performance service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

3- 2 Testing Performance This chapter explai ns how to verify cor rect oscillosco pe operation and perform tests to ensure that the oscil loscope meets the perfor mance specifications. To completely test and troubleshoot the m ixed-signal oscilloscope, you will create and u se a test connector accessory, as described in this chapter. • The test c[...]

3- 3 T es ting Pe rfor man ce List of T e st Equipment List of Test Equipmen t Below is a list of test and equipment and accessories required to perform the performance test ver ification procedures. Equipme nt Criti cal Spec ific ation s Recommen ded Model / Part Number Test co nnec tor, 8-b y-2 No t required if 01660-638 01 Test Fixt ure is avail[...]

3- 4 T est ing Pe rfor manc e T o construct t he test connec tor To construct the test connector The Agi lent 54621D /22D Mixe d-Sign al Oscillos cope has di gital cha nnels that you will nee d to connect to test equipment d urin g test ing. T o easily con nect the digital channe ls, you will cons truct a t est connecto r only i f the 01660- 63801 [...]

3- 5 T es ting Pe rfor man ce T o test the 54621D/22D Oscilloscope digital channels To test the 54621D/22 D Oscillosc ope digital c hanne ls The acquisiti on s y stem testi ng provides co nfidence that t he acquisition sy st em is f unction in g cor rec tly . It does not , how ever , ch eck a par tic ular spec ifica tio n. 1 Disconnect all probes f[...]

3- 6 T est ing Pe rfor manc e T o verify digital cha nnel threshold accuracy To verify digi tal channe l threshold accur acy This tes t ver ifies the digita l ch annel thre shold accu racy spe cific atio n of t he Agilent 546 21D/22D Mixed-Si gnal Osci lloscope. Thresho ld accuracy t est limits= ±(100 mV + 3% o f threshold setting) When to Test Y [...]

3- 7 T es ting Pe rfor man ce T o verify digita l channel threshold acc uracy 1 Turn on the test equipment and the oscilloscope. Let them warm up for 30 minutes b efore star ting the test. 2 Set up the os cilloscop e calibrator. a Set the oscillo scope calibr ator to provide a DC offs et voltage at the Cha nnel 1 o utpu t. b Use the multime ter to [...]

3- 8 T est ing Pe rfor manc e T o verify digital cha nnel threshold accuracy b Method 2 — Using the Test Fixture Use the Agilen t 01660-6380 1 P erforman ce Verific ation Test Fixture and the Agilen t 0165 0-61607 cable, BNC T ee, and BNC cab le to connec t the di gital channels D0 - D15 to the oscilloscope ca librator. See figure 3-3. Figure 3-3[...]

3- 9 T es ting Pe rfor man ce T o verify digita l channel threshold acc uracy 7 Press the oscillosco pe User softkey, then turn t he Entry knob () o n the front p anel on the oscillosc ope to set the thres hold test s ettings as shown in Table 3-3. T able 3-3 Threshol d Accuracy Vo ltage Te st Settings 8 Do the foll owing steps f or each of the thr[...]

3- 10 T est ing Pe rfor manc e T o verify voltage measuremen t accuracy To verify voltag e measur ement accur acy This test veri fies the vo ltag e measuremen t acc uracy . In thi s test, you wil l measu re th e out put o f a po wer s upply using dual curs ors o n the osci llosc ope, and compar e the results w ith t he m ulti meter r eadin g. T est[...]

3- 1 1 T es ting Pe rfor man ce T o ver ify voltage measurement a ccuracy b Set the Volts/Div setting to the value in the first line in Table 3-5. T able 3-5 Setti ngs Used to V erify Voltage Measurement Ac curacy c Press the Ac quire key . T hen press the Av e r a g in g softkey and set #Avgs to 64 . Wait a f ew secon ds for the measu remen t to s[...]

3- 12 T est ing Pe rfor manc e T o verify voltage measuremen t accuracy 3 Use the BNC tee and ca bles to connect the os cilloscope calibr ator /power suppl y to both the oscill oscope and the multimete r . 4 Adju st t he out put so th at th e m ult imet er r ead in g di spl ays the firs t Volts/div s upply set ting value in Table 3-5. W ait a few s[...]

3- 1 3 T es ting Pe rfor man ce T o verify ba ndwidth To verify bandwi dth Th i s te s t v e r i fi e s b an d wi d t h . In t h is t e st y o u w il l u se a n o s c il l o sc o p e c al i b ra t o r with a le vel s inew av e out put. Y o u w i l l u s e t h e p e a k - t o - p e a k v o l t a g e b o t h a t 1 M H z a n d a t b a n d w i d t h f [...]

3- 14 T est ing Pe rfor manc e T o v er ify band wid th 1 Connect the oscilloscope calibrator output through a 50 Ω feedthrough to the osc illoscope c hannel 1 input. 2 Set up the os cilloscop e. a Set the ti me base to 5 00 ns/div. b Set th e Volts/Di v for chan nel 1 to 200 m V/div. c Press the Acq uire key, then press the Av e r a g i n g soft[...]

3- 1 5 T es ting Pe rfor man ce T o verify horiz ontal Dt and 1/Dt acc uracy To verify hor izontal ∆ t and 1/ ∆ t accurac y This test v erif ies th e hori zontal ∆ t and 1/ ∆ t accura cy . In t his t est, you w ill use the oscil loscope to measur e the outp ut of a time mark genera tor . T est lim its: ±0.01% of re ading ±0.1% o f fu ll s[...]

3- 16 T est ing Pe rfor manc e T o ve rif y hor izont al D t and 1/ Dt ac cur acy 4 Change the cal ibrator t o 1- µ s markers . Change the time base to 200 ns/di v. Adjust the trigger level t o obtain a st able displ ay. 5 Measure the f ollowing: Frequency 1 MH z — The tes t limits are 997.9 kHz to 1.002 MHz. Period 1 µ s — The test limits ar[...]

3- 1 7 T es ting Pe rfor man ce T o verify trigger sensiti vity To verify trig ger sensitivi ty T h i s t e s t v e r i f i e s t h e t r i g g e r s e n s i t i v i t y. I n t h i s t e s t , y o u w i l l a p p l y 2 5 M H z t o t h e osci llos cope . Y ou will then decrea se the amplit ude of the signal to the specif ied level s, and check to se[...]

3- 18 T est ing Pe rfor manc e T o verify trigger sensitivi ty Test In te rna l T ri gger Se ns itiv ity 1 Press the Save/R ecall key, t hen press the Default Setu p s oft k ey. 2 Connect the c alibrator to channel 1 using a 50 Ω fee dthrough at t he oscill oscope inpu t. 3 Verify the t rigger sens itivity at 25 MHz and 0.3 5 divisions . a Set th[...]

3- 1 9 T es ting Pe rfor man ce T o verify trigger sensiti vity Test External Tr igger Se nsitivity V erify t he ext erna l trigg er sensiti vity at these settin gs: 100 MHz (54622 A/22D/ 24A), <150 mV p- p 60 MHz (54621A /21D), <150 mV p-p 25 MHz (All mod els), <75 mV p-p 1 Use the power splitt er to connect the calib rator to both the ch[...]

3- 20 Agilent 54622A/ 22D/24A Performa nce Test Record Agilent 54 622A/ 54622D/5 4624A Seri al No. _____ _______ ____ _____ ____ _____ ____ ____ Test by ___ _____ ____ _____ ____ _____ ___ Tes t Inte rval ___ ____ _____ ____ _____ ____ ____ _____ __ Work O rder No. ____ ____ _____ ____ _____ Recomm ended Next Tes tin g _____ ____ _______ ____ ____ [...]

3- 2 1 Agilent 54621A/ 21D Performance Test Record Agilent 54 621A/546 21D Seri al No. _____ _______ ____ _____ ____ _____ ____ ____ Test by ___ _____ ____ _____ ____ _____ ___ Tes t Inte rval ___ ____ _____ ____ _____ ____ ____ _____ __ Work O rder No. ____ ____ _____ ____ _____ Recom mended Next Tes tin g _____ ____ _______ ____ ____ Temp eratu r[...]

4 Calibrating an d Adjustin g service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

4- 2 Calibrating and Adjusting This chapter explai ns how to adjust the o scilloscope fo r optimum operating performance . You shoul d perform the har dware a djustments and self-calibration accordi ng to the following recommendations. • Perform hardware adjustments every 12 m onths or after 2,000 hours of ope ration . • Perform self-calibratio[...]

4- 3 Calibr atin g and Adju sting WARNING HAZARDOUS VOLTAGES ! Read the sa fety summar y at the ba ck of thi s book b efore p roceedi ng. Maintenanc e is performe d with power sup plied to the o scilloscope a nd with the prot ectiv e cover s remov ed. Only train ed servic e perso nnel w ho are a war e of th e haza rds in volved should per form the [...]

4- 4 Calib rating an d Adjusting T o adjust the po wer supply To adjust the power supply The o scil loscop e po wer supp ly h as bo th a +3.3 V ad justm ent, and a +5.1 V / -5.2 V balance a dj ustmen t. Othe r osc illo scope voltages a re b ased on the + 3.3 V adju stme nt. In t his p rocedu re, y ou will use a di gital multime ter to mea sure the [...]

4- 5 Calibr atin g and Adju sting T o adju st the po wer suppl y 2 Locate the power supply voltages at E204, E205, E207, and E 208 on the system board . The p ower suppl y vol tages are n ot la bele d on the sy stem board. See Figure 4-1 for t he loc atio ns. Figure 4-1 Low Vol tage Powe r Su pply Volt ages (on the bot tom of th e osc illo scope ) [...]

4- 6 Calib rating an d Adjusting T o adjust the po wer supply 4 If the +5. 1 V measurement i s out of tol erance, adjus t the +5.1 V / -5.2 V bal ance adjustment on the power supply. See Figure 4-2. 5 If the -5.2 V m easurement is out of tolerance , adjust the +5.1 V / -5.2 V balanc e ad justment on the power sup ply. See Figure 4-2. The +15.75 V s[...]

4- 7 Calibr atin g and Adju sting T o perfor m User C al To perform User Cal Perfo rm se lf-cal ibrati on: • eve ry 6 mon ths o r af ter 1000 hou rs of op erati on. • if the ambien t temp eratu re is >10 °C fro m the calib ratio n temp eratur e. • if you want to maximize the measurem ent accuracy. The a moun t of use, envi ronm ental con [...]

4- 8 Calib rating an d Adjusting T o adjust the osc illos cope display To adjust the oscilloscope displ ay In th is proc edure, yo u wil l m ake ad justm ents usi ng t wo dis play patte rns. T able 4-3 Equi pmen t Requ ired to Adj ust the O scil losc ope Di spla y 1 Connect the digital multimeter to the end of R901, located closest to the fuse, as [...]

4- 9 Calibr atin g and Adju sting T o adjust the o scilloscop e display 5 Adjust H.H OLD (horizontal hold) to c enter the display horiz ontally. 6 Adjust FOCUS to achieve t he best focus. 7 Adjust V. L I N (vertical l inearity) to posi tion all f our corne rs of the hal f- bright bor ders equall y. 8 Adjust V. S I Z E (verti cal size) to cent er th[...]

5 Troublesh ooting service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

5- 2 Troubles hooting This chapter begins with sug gestions for sol ving general problems that you may encounter with the oscilloscope. It tells you what to do in these cases: • If there is no trace display • If the trace displ ay is unusual or unexpected • If you cannot see a channel • If you cannot get any response f rom the oscill oscope[...]

5- 3 Solving General Problems wit h the Oscilloscopes This section de scribes how to sol ve general problems t hat you may encounter while using the 546 21A/22A/24 A Oscilloscopes and the 5462 1D/2 2D Mixe d-Si gna l O scill osco pes to make me asure me nts . After troubleshooting the oscilloscope, if you nee d to repl ace parts, refer to the “Re[...]

5- 4 T rou ble sho otin g If the trace display is unusual or unexpected If t he trace displ ay is unusual or un e xpected ❏ Check tha t the Horizont al time/div ision setting is correc t for the expec ted frequency range of t he input sig nals. ❏ The sampling spee d of the oscilloscope depends on the time/di vision setting. It may be that w hen[...]

5- 5 T roublesho oting If yo u c ann ot s ee a cha nne l If you cannot see a channel ❏ Check that the oscilloscope p robe cable is sec urely conne cted to the input connec tor. ❏ Check that the osc illoscope prob e lead wires ar e securely inserted into the connec tor assembly and that the probe clips make good contac t with the probe lead wire[...]

5- 6 Troubleshooting the Oscill oscope The service p olicy for the 54621A/22A/2 4A Oscilloscopes and the 5462 1D/2 2D Mix ed -Sig nal O scil losc op es i s inst rum ent r epla cem en t. Please call (8 77) 447 -7278 to return the defecti v e instrument, and Agilent Technol ogies will e xpedite a refur bished instrument to you under the Agile nt Expr[...]

5- 7 T roublesho oting T o c ons truc t you r ow n dumm y lo ad To construct your own dummy load 1 Obtain a connector that is compatible with the connector J3 on the Low Voltage Power Supply. 2 Connect load resistors to the connector as follows: Figure 5-1 Loca tion of the Low Vol tage Power Suppl y Connec tors Connec tor Load (Amps) Resisto r Watt[...]

5- 8 T rou ble sho otin g T o check out the osc illoscope To check out the osci lloscope 1 I s an interfa ce module connected to the rear panel of the oscilloscope? If the an swer is yes, fol low these ste ps. Otherwise, go to step 2. a Turn off the osc illoscope. b Remove the interface modul e. c Turn on the os cilloscope , then chec k for the fai[...]

5- 9 T roublesho oting T o check out the oscillos cope 5 Disconnect the display ribbon cable from the system board. Then check the signals on the system board listed in Table 5-2. T able 5-2 Display Signals on the System Bo ard – All Oscillo scopes If t he sig nals are goo d, rep lace the d ispla y ass embly . If t he sig nals are not g ood, rep [...]

5- 10 T rou ble sho otin g T o check out the osc illoscope 8 Is the fan ru nning? The low v olta ge p ower supp ly ha s a ther ma l cut-o ut circ uit. If th e fa n i s defectiv e, the low voltage power supply wi ll shut do wn when it gets too hot f or safe operat ion. If the fan i s runni ng, pe rform the int ernal self-te sts. Go to “T o run th [...]

5- 1 1 T roublesho oting T o check the Low V oltage Powe r Supply To check the Low Voltage Power Supply 1 Disconnect the power cord from the oscillos cope. Then remove the oscill oscope cover and s et the oscillosc ope on its si de. CAUTION USE AN EXTER NAL F AN TO AVOID OVERHEATING C OMPONENTS ! If you operat e the o scillosc ope with th e cabinet[...]

5- 12 T rou ble sho otin g T o check the Low V oltage Power Supp l y T able 5-4 Low Volta ge Power Su pply Tole rances 4 If the +5. 1 V measurement i s out of tol erance, adjus t the +5.1 V adjustment on the power suppl y. 5 If the -5.2 V m easurement is out of tolerance , adjust the -5.2 V adjustment on the power suppl y. The +15.75 V s upply is n[...]

5- 1 3 T roublesho oting T o run the in ternal self- tests To run the internal self-t ests Self T est perf orms a s erie s of int ernal pr ocedures to verif y t hat the os cill oscope and any attached modul e are operating pro perly . It is reco mmended tha t you run the Self T est: • aft er ex peri encin g abnor mal operat ion • fo r addit ion[...]

6 Replacing Assemblies service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

6- 2 Replacing Assemblies This chapter describes how to remove assemblies from the oscilloscope. After you have removed an assembly, to install the r eplacement assembly, fol low the instructions in re verse order. The removabl e assemblies include : •C a b i n e t •F a n • Flo pp y D riv e •F r o n t p a n e l •D i s p l a y •S y s t e[...]

6- 3 Replaci ng Assemblies WARNING HAZARDOUS VOLTAGES ! Read the sa fety summar y at the ba ck of thi s book b efore p roceedi ng. Maintenanc e is performe d with power sup plied to the o scilloscope a nd with the prot ectiv e cover s remov ed. Only train ed servic e perso nnel w ho are a war e of th e haza rds in volved should per form the ma inte[...]

6- 4 Repla cing Asse mb lies T o remove t he cabi net To remove the cabine t 1 Turn off t he oscillo scope and discon nect the power c able. 2 Rotate the handle up as sh own below. 3 If a module is installed, re move it from th e oscillos cope. 4 Using the T20 TORX driver, remove the two screws from the rear of the cabinet. 5 Using your t humbs, ge[...]

6- 5 Replaci ng Assemblies To r e m o v e t h e f a n To remove the fan 1 Disconnect the fan cabl e from the power s upply boar d. 2 Using t he T2 0 TORX driver, remove the three s crews that hold t he f an to the deck. Figure 6-2 Remo ving the fan service.book Page 5 Wednes day, December 18, 2002 8:35 AM[...]

6- 6 Repla cing Asse mb lies T o remove the floppy drive To remove the floppy drive 1 Using the T8 TORX driver, loosen the two screws that hold the drive to the deck . 2 Lift th e drive away f rom the sys tem board. 3 Disconnect the ribbon cable from the connector on the rear of the drive. Figure 6-3 Remo ving the floppy dr ive service.book Page 6 [...]

6- 7 Replaci ng Assemblies T o rem ov e th e fro nt pa nel To remove the front pa nel 1 Remove the int ensity knob a nd shaft by gr asping the kno b with one hand and the gr asping the s haft behind the front panel with the o ther hand and pull ing the shaft str aight out from the fr ont panel . 2 Disconnect t he keyboard ri bbon cable W2 fr om the[...]

6- 8 Repla cing Asse mb lies T o remove the d isplay To remove the dis play 1 Remove the fr ont panel from the o scillosco pe. 2 Disconnect t he ribbon cabl e from the di splay board. 3 Using the T20 TORX driver, remove the four screws that hold the display to the deck. Set these screws aside. Figure 6-5 Remo ving the dis play CAUTION US E CORRECT [...]

6- 9 Replaci ng Assemblies T o remo ve t he di spl ay 4 Use a flat -blade screwdriver to gently unh ook the la tch that holds the white power- actuator sha f t to the po wer switch, the n disconnect the shaft from the power switch. After you disconnect the shaft, make sure you positi on it in the re cess along t he side of t he display br acket. Fi[...]

6- 10 Repla cing Asse mb lies T o remove the sy stem board To remove the system board 1 Remove the fl oppy drive. 2 Using the T10 TORX driver, remove the six screws that hold the system board to th e deck. 3 Remove the two hex nuts and washers from the rear BNCs using the 9/16-i nch socket dri ver. The 54621 D , 54622D, and 54624A h ave two rear BN[...]

6- 1 1 Replaci ng Assemblies T o remove the sy stem board 7 Lift the back of the board to clear the main deck and then pull the board straigh t out. Figure 6-8 Remo ving the syste m board service.book Page 11 Wednesday, Dece mber 18, 2002 8:35 AM[...]

6- 12 Repla cing Asse mb lies T o remove th e powe r supply To remove the power supply 1 Remove the fan . 2 Disconnect t he ground wire (green wi re with the y ellow stri pe) from the deck . 3 Disconnect t he ribbon cabl e from the power supply board. 4 Remove the pri nter power connec t or by sliding the connector out of the chassi s. Figure 6-9 D[...]

6- 1 3 Replaci ng Assemblies T o remo ve t he p owe r sup ply 5 Use a flat -blade screwdriver to gently unh ook the la tch that holds the white power- actuator sha f t to the po wer switch, the n disconnect the shaft from the power switch. After you disconnect the shaft, make sure you positi on it in the re cess along t he side of t he display br a[...]

6- 14 Repla cing Asse mb lies T o remove th e powe r supply 6 Using the T20 TORX driver, remove the screw holding the power supply board to th e deck. Figure 6-11 Remo ving the power supp ly 7 Slide the power supply board toward the front panel about 1/2 inch. Slip the power suppl y board keyhol e slots off of the pins on the de ck. service.book Pa[...]

6- 1 5 Replaci ng Assemblies T o re mo ve th e keyb oar d asse mb ly To remove the keyboard a ssembl y 1 Remove the fr ont panel. 2 Remove all of the knobs by pul ling them st raight out. 3 Using the T10 TORX driver, remove the four screws from the keyboard shie ld. 4 Lift the ribb on cable end of the small keyboard and simultaneously slide the sma[...]

6- 16 Repla cing Asse mb lies T o remove t he hand le To remove the han dle • Rotate the handle downwar d until it just p asses th e last det ente position ; this is about 1/2 inch before the handle touches the bottom of the oscil loscope. • Pull the sides of the handl e out of the cabinet. service.book Page 16 Wednesday, Dece mber 18, 2002 8:3[...]

7 Replaceable Parts service.book Page 1 Wednes day, December 18, 2002 8:35 AM[...]

7- 2 Replaceable Parts This chapter descr ibes how to ord er replaceable assemblies and parts for the Agilent 5462 1A/22 A/24A Oscil loscope an d Agil ent 54621D/2 2D Mixed-Si gnal Oscilloscope. Diagrams and parts lists are included for assemblies and hardware that you can ord er. Before working on the oscilloscope, read the safety summary at t he [...]

7- 3 Replace able Part s T o order a rep lac emen t pa rt To order a repla cement part • To order a part i n the material list, quote t he Agilent Technologie s pa rt number, indic ate the quantity des ired, and addr ess the order to your nearest Agil ent Technologies Sales Office. • To order a part not listed in the material list, include the [...]

7- 4 Replac eable Parts T o o rde r a re plac emen t par t Figure 7-1 Explod ed V iew o f the 54621 A/2 2A/24A /21D/ 22D Osc illo scope service.book Page 4 Wednes day, December 18, 2002 8:35 AM[...]

7- 5 Replace able Part s T o order a rep lac emen t pa rt T able 7-1 Repl aceab le Pa rts Refer ence Designat or Agilent Part Number Qty Descr iption A1 5 4621-6900 1 1 Refur bished P roduct 2 CH 60M Hz(5462 1A-Ag ilent Expre ss) A1 5 4621-6900 2 1 Refur bished P roduct 2+ 16 CH 60MHz (54621D-A gilent Ex press) A1 5 4622-6900 1 1 Refur bished P rod[...]

7- 6 Replac eable Parts T o o rde r a re plac emen t par t MP1 54801-4740 1 Se e Descr Knob - 12mm Fl int Gra y (54621A/2 2A – 6 ea) (54621D/2 2D/24A – 8 ea) MP2 5 4801-4740 2 See Desc r Knob - 18mm Fl int Gray (54621A/2 1D/22A/ 22D – 3 ea) (54624A – 5 ea) MP3 54622 -43702 1 In tens ity shaf t MP4 54622-4370 1 1 Po wer switch shaf t MP5 546[...]

7- 7 Replace able Part s T o order a rep lac emen t pa rt MP25 54622-6340 3 Se e Descr Attenua tor lid (54621A/ 21D/22A/22D - 1 each) (54624A - 2 each ) W1 54630 -61601 1 Disp lay rib bon cabl e W2 54710 -61603 1 Front-p anel k eyboa rd ca ble W3 54801 -61625 1 Flo ppy diske tte driv er ribbo n cabl e W4 54630-6160 2 1 Power ca ble (from powe r sup[...]

DECLARA TION OF CONFORMITY Accord ing to ISO/ IEC Guid e 22 and C EN/CENELEC EN 45014 Manufa ctur er’ s Name: Manu factur er ’ s Addre ss: Agil ent Tech nolo gies, Inc. Garden of the Gods Road Colorad o Springs, Co lorado 80907 U.S.A. Decla res, th at the p rodu ct Prod uct Na me: Digit izing Oscillo scope Model N umber( s): 54 621A/D, 546 22A/[...]

Produc t Regul ations EMC IEC 6132 6-1:1997 +A1:1998 / EN 61326-1:199 7+A1:19 98 CISPR 11:19 90 / EN 55011:19 91 IEC 61000 -4-2:1995 +A1:199 8 / EN 61000-4-2 :1995 IEC 61000 -4-3:1995 / EN 61000-4-3 :1995 IEC 61000 -4-4:1995 / EN 61000-4-4 :1995 IEC 61000 -4-6:1996 / EN 61000-4-6 :1996 Canada : ICES -001:1998 Perf ormanc e Cr iteri a B B B A, B (1 [...]

Agilent T echn ologies Inc. P .O. B ox 21 97 1900 Gard en of the Gods R oad Colo rado Spr ings, CO 80901-21 97, U. S.A. Safety Notices This apparat us has bee n designed and tested i n accor- dance with IEC Public ation 1010, Safe ty Requ ire ments f or M ea- suring A pparatus , and has be en supplied in a safe condition. This is a Safet y Class I [...]

Notices © Agilent Technologies, Inc. 2000- 2002 No part of thi s manual may be reprodu ced in any form o r by any mea ns (includ ing elec tronic storage an d retriev al or trans la- tion in to a f oreign languag e) without pri or agreem ent and written consent fr om Ag ilent Technolo gies, Inc . as governed by Unit ed Stat es and intern a- tional [...]