Tektronix 2445, 2465 User Manual

Tektronix

COMMITTED TO EXCELLENCE

Tektronix, Inc.

P.O. Box 500

Beaverton, Oregon

PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL.

2445/2465

OPTION 06 and OPTION 09

COUNTER/TIMER/TRIGGER

and

WORD RECOGNIZER

OPERATORS

INSTRUCTION MA NU A L

97077 Serial Number

070-463 1 -0 0

Product Group 38

First Printing AUG 1984 Revised MAR 198 5

Products of Tektronix, Inc. and its subsidiaries are covered by U.S. and foreign patents and/or pending patents.

TEKTRONIX, TEK, SCOPE-MOBILE, and are registered trademarks of Tektronix, Inc. TELEQUIPMENT is a registered trademark of Tektronix U.K. Limited.

Printed in U.S.A. Specification and price change privileges are reserved.

&

INSTRUMENT SERIAL NUMBERS

Each instrument has a serial number on a panel insert, tag, or stamped on the chassis. The first number or letter designates the country of manufacture. The last five digits of the serial number are assigned sequentially and are unique to each instrument. Those manufactured in the

United States have six unique digits. The country of

manufacture is identified as follows:

BOOOOOO Tektronix, Inc., Beaverton, Oregon, USA 100000 Tektronix Guernsey, Ltd., Channel Islands 200000 Tektronix United Kingdom, Ltd., London 300000 Sony/Tektronix, Japan 700000 Tektronix Holland, NV, Heerenveen,

The Netherlands

2445/24 65 Option 06 and Option 09 Operators

TABLE OF CONTENTS

Page

LIST OF ILLUSTRATIONS............................................. ii

LIST OF TABLES

OPERATORS SAFETY SUMMARY.............................. iii

Section 1 SPECIFICATION

Section 2 PREPARATION FOR USE

Section 3 CONTROLS, CONNECTORS,

...........................................................

INTRODUCTION....................................

DESCRIPTION OF FUNCTIONS PERFORMANCE CONDITIONS

OPERATING CONSIDERATIONS

POWER-UP TESTS............................... 2-1

AND INDICATORS

FRONT PANEL CONTROLS REAR PANEL READOUT DISPLAYS

........................................ 3-2

.........................

........

.........

......

................ 3-1

ii

...

1-1

...

1 -1

...

1-2

2-1

3-2

Section 4 OPERATING PROCEDURES

PRECISION TIME-INTERVAL

MEASUREMENTS................................

MENU MODE FUNCTION

SELECTION............................................

WORD OUT SIGNAL

CONTROLLING INSTRUMENT

FUNCTIONS WITH THE GPIB

Section 5 OPERATOR’S CHECKS

INTRODUCTION INITIAL SETUP

FREQUENCY VERIFICATION.............

DELAY VERIFICATION DELTA VERIFICATION

DELAY-BY-EVENTS..............................

Section 6 OPTIONS AND ACCESSORIES

INTRODUCTION

OPTIONS................................................

ACCESSORIES

Appendix A GPIB COMMAND REFERENCE

CHANGE INFORMATION

...........................

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Page

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4-1

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4-2

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4-9

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5-1

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5-1

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5-1

.. .

5-2

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5-2

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5-2

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6- 1

...

8- 1

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6-1

24 45/2465 Option 06 an d Option 09 Operators

LIST OF ILLUSTRATIONS

Figure Page

The 2445 Option 06 and Option 09 Oscilloscope

The 2465 Option 06 and Option 09 Oscilloscope..................................................................

1 -1 The Word Reco g n iz e r probe................................................................................................... 1-3

3 -1 Counter/Timer/Trigger and Word Recog niz e r controls........................................................... 3-1

3-2 Re a r Pan e l Word Recognizer connectors

4 - 1 Del ta Time relativ e accuracies.................................................................................>

4-2 D elay Time relative accuracies

.............................................................................................. 4-4

.............................................................................. 3-2

.................................................................. iv

tv

.............

4-3

LIST OF TABLES

Table Page

1-1 C ounter/Timer/Trigger Electric a l Characteristics

1-2 Word Recognizer Elect r i c a l Characteristics.....

1-3 Environmental Characteristics

1-4 Mechani cal Characteristics

4-1 Delay-by-E ve nts Combinations............................................................................................... 4-6

4-2 Resolution Selections

4-3 Counter/Timer/Trtgger GPIB Commands................................................................................ 4-10

4-4 Word Recogniz er GP!B Commands....................................................................................... 4-13

A-1 Counter/Timer/Trigger GPIB Command Summary A-2 Word Recogn izer GPIB Command Summary

ii

............................................................................................................ 4-8

.

............................................................................................... 1-11

.................................................................................................... 1-11

.................................................................... 1-4

....................................................................... 1-10

................................................................ A-1

........................................................................ A-1

2445/2465 Option 06 and Option 09 Operators

OPERATORS SAFETY SUMMARY

The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and cautions will be found throughout the manual where they apply and do not appear in this summary.

Terms in This Manual CAUTION statements identify conditions or practices

that could result in damage to the equipment or other property.

WARNING statements identify conditions or prac tices that could result in personal injury or loss of life.

Terms as Marked on Equipment

CAU T ION indicates a perso nal injury haz a r d not immedi ately accessible as one rea ds the markin g s, or a ha zar d to property, including the equip ment itself.

DANGER indicates a pers o n al injury haza r d immediately

acce s sible as one read s the mark in g .

Symbols in This Manual

This symbol indic a te s where applicable cau tionary or other informatio n is to be found. For maximum and mi n i mum input voltage s ee Table 1-2 .

Symbols as Marked on Equipment

^ D A NGER — High voltage.

Grounding the Product

Th is product is ground e d through the grounding condu c to r of the power cord. To avoid electrical shock, plug the power cord into a properly wired rec ep ta c le be f o r e con necti ng to the product input or output termin a ls . A protec tive ground connectio n by way of the grounding conducto r in the power cord is essential for safe operation.

Danger Arising from Loss of Ground

Up on loss of the protective-ground conne cti o n, all acces s i ble conductive parts (including knobs and controls that may appear to be insulating) can render an electric shock.

Use the Proper Power Cord

U se only the power cord and connector spec ifi e d for you r

product.

U se only a power cord that is in good condition.

Use the Proper Fuse

To avoid fire haza r d , use only a fuse of the correct type, voltage rating an d current rating as spec ified in the parts list for your product.

(? ) Protective go u n d (ear th ) termina l.

/ \ ATTENTIO N — Re fer to ma nual .

Power Source

This product is intende d to operate from a power sourc e

that does not apply mor e than 250 volts rms between the

supply conductors or between either supply conductor and

ground. A protective grou n d connection by way of the

grounding conductor in the power cord is essential for safe

operation.

Do Not Operate in Explosive Atmospheres

To avoid explosion, do not operate this product in an explosi ve atm o s p he re unless it has been spe c i fi c a ll y certified for such operation.

Do Not Remove Covers or Panels

To avoid perso n a l injury, do not remove the product cov ers or pan e ls. Do not operate the product without the cov ers and panels properly installed .

2445/2465 Option 06 and Option 09 Operators

The 2445 Option 06 and Option 09 Oscilloscope.

4631-01

The 2465 Option 06 and Option 09 Oscilloscope.

4631-02

2445/ 2465 Option 06 and Option 09 Operators

SPECIFICATION

Section 1

INTRODUC TION

The Counter/Tim er /T rigg e r (Optio n 06) and Counter/ Timer/Trigger with Word Recogniz e r (Optio n 09) add the following four cap a bi l iti e s to the TEKT R O N IX 2445 an d 2465 Oscillo s c o p e s :

1 . P recisi o n time-in te rv a l me a s u r e ment.

2. Event and frequen c y counting.

3. Dei a y - b y -events triggering.

4. Log ic trigger ing.

The 17-bit W ord R e c ogniz e r pro b e of Option 09 extends the capa b ilit ie s of these functions. The function s describ ed in this man ual wh ic h use the Word Recog n iz er require the Word Rec o g nizer Optio n 09 and the 17-b i t Word Recogn iz e r probe.

The Counter/Timer /T rigg e r and Counter/Timer/Trigger with Word Recog nizer options use the 2445 an d 2465 alphan um er ic crt readou t to displa y configuration me nus and function resu lt s.

1 244 5/2 4 6 5 Option 06 and O p ti on 09 Counte r /

Timer/Trigger and Wor d Reco g n izer Ref erence Guide

Each instrument containing the Word Rec o g n iz e r is pro vid ed with the following standard access o r ie s in additi o n to those mention e d for the Counter/Tim er /T rigg e r:

1 P64 07 Word Recogniz e r Probe packa g e .

The following optional acces so r y is also av aila b l e for these options:

1 244 5 /2 46 5 Option 06 and Option 09 Counte r/

Timer/Trigger and Wor d Rec o g n i z e r Ser v i c e Manual

DESCRIPTION O F FU NCTBON S

Precision Time-interval Measurements

Prec i s i o n delay and preci s i o n delta -tim e mea s urement s are ma d e possible by a precisio n timer which directly me a s ures the time interval betwee n the start of the A Swe e p an d the start of the B Sweep. Direct meas urement capability operates when the B Swe e p is triggera ble after dela y as well as in RUN AFT D LY. Direc t m easuremen t incr e ases resolution and acc u r a c y.

The oscilloscope operators m a nual sho u ld be consulted for operating information regar d ing the 2445 and 2465 instruments. The ope r ati o n an d specification s of functions not des c ri b e d in this manual rema in uncha n g ed.

in addition to the standa rd instrument’s stand a rd accesso r ie s, the follo w in g stand a rd accessories are pro

vided with each instrument containing the 2445/ 24 6 5 Option 06 Counter/T im e r/T r ig ge r:

1 2445/246 5 Op t ion 06 an d Option 09 Counter/

Timer/Trigger an d Word Recogn iz e r Operators Man u a l .

1 2445/2465 Opti o n 06 an d Option 09 Counter/

Timer/Trig ger and Wor d Rec ogniz er Reference Ca rd

Only one of the four functions provid e d by th e Counter/Timer/ Tri gge r Optio n (Precis io n Tim e - in te r v al Mea s u re ment, Even t Counti n g , Dela y - by - E v e n ts Trigger ing, and Logic Triggering) can be active at a gi ven time with the exception that preci s ion time measurement s are avai lable with the Logic Trigger functio n whe n the B

Swe e p is triggered by the Word Recognizer .

W hen ti m in g m e a s u r e m e n t s are reques te d whil e a conflicting Counter/Timer/Trigger (C/T /T ) function is opera tin g , the timin g mea s u re ment is dis p la y e d with the

accu ra c y and res olution associ a te d with a 2445/24 6 5 instrume nt not equipped with the Counter/ Timer/Trigg er Optio n. The word SET following the time meas u r e ment indicates this condition.

Ί-1

Specific ation 2445/2465 Option 06 and Option 09 Op erators

Pulse-width m e a s urement is m ade easier by Alternate Slope (ALT SLP) mode. W hen this mode is selected, the delay e d sweep controlle d by the Δ REF O R DLY POS con trol triggers on the slope indicated by the SLOPE indicator, and the delayed swe ep controlled by the Δ control triggers on the opposite slop e .

Event Counting (COUNT)

The Event- C o u n ti n g function has three modes: Fre  quency, Pe ri o d, and Tota liz e . Either the A Trigger events or the 17-bit Word Recog ni z e r (WR ) events (if the Option 09 Word Reco g n iz e r is present) can be counted.

Delay-by-Events (DLY/EVTS)

The De l ay - b y -Even ts function adds the ability to delay a sweep by a numb e r of events , rather than by an absolute time interval. Either the A or the B Swee p can be delayed; the dela y pe ri o d begin s whe n a “ Start” event occurs, and the duration of the delay is determ i n e d by a number of occurrences of a “ D el a y ing” event. The sweep to b e dela y e d , the “ Start” ev ent, the “Delay in g ” event, and the number of occu rrences of the “ Delaying” event are all operator sele c ted.

The B swee p can trigger on the word rec o gniz e d by the

Word Recogni z er.

Word Recognizer

The 17-b it Word Recognizer detects any 17-bit digital word, either synchronously with an external clock or asyn chronous^. Word occurrences may be counted for fre que n c y , period, or totalize mea s urement s . A word can trigger either the A or B Sweep, or the word can be a delay in g eve n t in the Delay-b y- E v e nts function. The Wo rd Reco gn iz e r probe is shown in Figure 1-1.

PERFORMANCE CONDITIONS

Excep t as noted in Tables 1-1 through 1-4 of this manual , the electrical, enviro n menta l, and me c hanic al characteristics of Option 06 and 09 instruments are identi ca l to those specified in the respe c ti ve 2445 and 2465 Oscillos c op e Operators man uals.

Logic Trigger (LOGIC-TRIG)

This function add s logic-triggering capabilities. The A

Sweep can trigger on any of the following:

1 . The logical AND of the A a nd the B triggers going

TRU E .

2. The logica l O R of the A and the B triggers going TRUE .

3. The occ u rr e n c e of a word recog n iz e d by the Word Rec o g n iz e r.

The electrical characteristics are val i d when th e instru ment has bee n adjusted at an ambien t te m p er a tu re betwe e n +20 and +30°C, has had a warm-up perio d of at least 20 minu te s, an d is operated at a n ambient tem peratu re betw e en —15 and +55°C (unles s otherw is e not e d).

Items listed in the “ Perform a n c e Req uir e m e nts ” colum n are verif ia b le qualitative or quantitative limits that de fi n e the meas u r ement capabilities of the instrum e n t.

1-2

2445/2465 Option 06 and Option 09 Operators

Specification

Figure 1-1. The Word Recognizer probe.

1-3

Specification

2445/2465 Option 06 and Option 09 Operators

Counte r/Timer/Trigger Electrical Charact eristics

Characteristics | Performance Requirements

SIGNAL INPUT SPECIFICATIONS FOR COUNT, DELAY-BY-EVENTS,

AND LOGIC TRIGGER FUNCTIONS EXCLUDING WORD RECOGNIZER

Table 1-1

Max imum Input Frequency Min imum W id t h of H i gh or

Low State of Input Signai Sensitivity

D C to 50 MHz (0.5 H z to 50 MHz

for Fr equ e n cy an d Pe r i od)

C H 1 a nd CH 2 C H 3 and CH 4

50 MH z to 150 MHz

C H 1 and CH 2 C H 3 and CH 4

RA NGE S

33= 150 MH z.

<3.3 ns .

1. 5 divisio n s .

0.75 divisio n.

4.0 division s .

2.0 division s .

FREQUENCY

RANGE LSDa

1 Hz 100 nHz

10 Hz 1 uHz

10 0 Hz 10 uHz

1 kHz 100 uHz

10 kHz 1 mHz

10 0 kHz 10 mHz

1 MHz 10 0 mHz

10 MHz 1 Hz 10 0 MHz 1 0 Hz 150 MHz 100 Hz

Auto Ranging

Accura cy Time Bas e Err o r (TB E)

Reso lu tio n

Disp la y Upda te Rate

aLeast significant digit

1-4

Upran g es at 100% of full scale; downrang e s at 9% of full scale.

Fu ll scale corresponds to the vaiu e given in the R ang e column. The maxim u m displayed valu e for an y ra nge is the Rang e value minus the LS D valu e.

± [Resolutio n + (Fre q u e n c y X TBE)] Hz .

10 ppm with less than 5 ppm per year drift.

1.4 X Freque n c y 2 X TJE ^ N +

Twice per sec o n d or twice the period of the input signai , which ever is slower.

Table 1-1 (cont)

2445/2 465 Option 06 and Option 09 Ope rators

Specification

Performance Requirements

LSD

1 fs

RANGES

Characteristics

PERIOD

RANGE

10 ns

10 0 ns 10 fs

1 με 100 fs

10 μβ

1 ps

10 0 ms 10 ps

1 ms 100 ps

10 ms

1 ns

100 ms 10 ns

1 s 1 00 ns

Mini mum Period

2 s

<6.7 ns

1

Auto Rang i n g Upra n g e s at 100% of full scal e ; downrang e s at 9% of full scal e.

Fu l l scale corresponds to the value given in the Range colum n . The maximum displaye d value for any range is the Range valu e min u s the LSD value.

Accura cy ± [Resolution + (TBE X Per iod)].

Res o lu ti o n ± [LSD + (1.4 X TJEJ/N] Display Update Rate Twice per second or twice the perio d of the input signa l, whichev

er is slower.

TOTALIZE

Max imum Cou nt

9999 9 99 .

Disp la y Upda te Rat e Twice per second or onc e per eve n t, which e v e r is slow e r .

DELAY BY EVENTS

Maximum Eve nt Coun t

Minimum Time from Start

4194 3 03 . 4 ns.

Sig n a i to Any Del ay Ev ent

LOGIC TRIGGER

Min imum Fu n c ti o n Tru e Time 4 ns.

Minimum Fun c ti o n Fal se Time

4 ns.

1 -5

Specification

2445/2465 Option 06 and Option 09 Operators

Table 1-1 (cont)

Characteristics

R un After Deia y

Acc u r a c y

Ma x imum Mea s u ra b le Del ay Time Trig g e rable After Dela y

Acc u r a c y

Performance Requirements

DELAY TIME

LSDb + [0.0012 X (A SE C/DIV)] + [0.03 X {B Time/Div)c + A

Trigger Leve l Error + 50 ns . Wh e n the A Sweep is triggere d by the Word Recogn iz er in syn

chronous mode , add 100 ns for probe delay ; in asynchronous

mo d e, add 200 ns for probe de lay.

NOTE

Due to changes in the amount of trace that is visible before the trigger point, caused by changes in intensity and the Z axis, the CfT/T and the base instrument measure Delay Time from different

points.

9.95 times the A SEC/DIV setting.

LSDb+ [10 ppm X {mea s u r e d interval)] + TJ E + A Trigger Le vel

Error + B Trigger Level Erro r + 0.5 ns.

If the A and B Swee ps are triggered from different channels , then

add 0.5 ns for channel-to -c h an n e l mismatc h .

Minim um Measu ra b le Delay Time Disp l a y Update Ra te

bSee Table 4-2.

CB time/div includes SEC/DIV, X10 MAG, and VAR.

When the A Sweep is triggered by the Word Recogniz e r in syn chronous mode, add 100 ns for probe deiay; in asynchronous

mo d e, add 200 ns for probe dela y . 70 ns.

In Auto Resolution, twice per second or once for every swe ep, whichever is slower.

In 1 ns , 100 ps, an d 10 ps resolution modes, the update rate depen d s on the A SEC/DI V setting an d the trigger repetition rate.

1-6

Table 1-1 (cont)

Specification

2445 /2465 Option 06 and Option 09 Operators

Characteristics

Run After De l a y

Accuracy

Triggera bl e After Delay

Accuracy

Super im p o s ed Delta Tim e

Non-sup e rimposed Delta Tim e

Performance Requirements

DELTA TIME

LSDb + [0.0008 X {A SE C / D I V ) ] + [0. 0 1 X (B Tsme /D i v)c ] + 83

ps. Whe n the A Sweep is trigge re d by the Word Recog n i z e r in syn 

chronous m ode, add 1 ns for prob e jitter; in asynchron o u s mode, add 20 ns for prob e jitter.

LSDb + [0.01 X (B Ttme/Div)c] + [10 ppm X (A SEC / DIV)] + [10

ppm X (meas ured interv al) ] + 50 ps + TJE. if C H 3 or CH 4 is one ch a nne l of a two-channel m easure ment,

add 0.5 ns for channe l - to - c h anne ! dela y misma tc h .

LSDb ~j “ I tj-p^p — Vq £| _"t ^ [(0.0005 div) X (1/SRp^p 4- 1 /SRDElt)] + [10 pp m X (A SE C /D I V ) ] + [10 ppm X (measu r ed

interval)] + 50 ps.

If A and B sweeps ar e triggered from different ch a nne ls , ad d 0. 5

ns for channel- t o -c h a n n e l mism a tc h + [0.5 div X (1/SRref +

1/SRqelt)] ior trigger offset. Minimum Disp la y a b le Delta Time Maxim um Display a b ie Delta Time Disp la y Update Rat e

0 s.

± 9.95 times the A SEC / D I V settin g .

In Auto Reso lu ti o n , twice per sec o n d or once for ever y four

sweeps, whichever is slower.

In 1 n s , 100 ps, and 10 ps resolution mode s, the updat e ra t e

depends on the A SEC/ D I V setting and the trigger repetition rate .

ALTERNATE SLOPE

Accuracy Minim u m Dis p la y a b le Width Maximum Displaya b le Width

^See Table 4-2.

CB time/div includes SEC/DIV, X10 MAG, and VAR.

. . . . . . . . . . ..

dThis term assumes the trigger points are between the 10% and 90% points of the waveforms. Fait time is expressed as a negative risetime.

__

Same as DEL T A TIM E Triggerable After Delay.

1 ns.

9.95 times the A SEC/ DIV setting ,

REV DEC 1984

1 -7

Specification 244 5/24 65 Option 06 and Option 09 Operators

Tabl e 1-1 (c ont)

Characteristics

DEFINITIONS

Performance Requirements

A Trigger Level Error = (A Trigger L evel Readout Error)/SR A. B Trigger Level Error = (B Trigger Le vel Readout Error)/SRB .

trREF = risetim e , referen c e trigger sign a l .

trDELT = riseti me, delta trigger signal . SRA = slew rate at trigger point, A sweep trigger signai in div/sec. SR g — slew rate at trigger point, B sweep trigger signa i in div/sec.

SRr ef = sle w rate at trigger point, referen c e trigger signai in div/sec.

S R De lt = s,ew rate at trigger point, delta trigger signal in div/sec.

TJE = trigger jitter error.

= (Trigger Jitter)/ \/N .

Fo r de ia y or delta time, dis reg ar di ng no is e in the sign a i, this term contributes <1 LSD if the slew rate is greater than

0.03 vertical div/ns or if the slew rate is greater than 30000 vertical div/horizontai div. Trigger Jitter = yfReference Trigger Signa l Jitter)2 + (Delt a Trigger Signal Jitter}2 + (A Sweep Trigger Sig n a l Jitter)2'.

Refe r e nce Trigger Signai Jitter = (ens + e nREF )/SRref-

= 0 for Freq uency mo de.

en s = sco p e noise in div .

= 0.0 5 div for HF R EJ trigger couplin g. = 0.1 div for DC trigger coup l in g , 5 m V to 5 V sensitivity. = 0.1 5 div for DC trigger coupling, 2 mV sensitivity.

enREF = reference signai rms nois e in div.

Del t a Trigger Signal Jitter = (ens + e nDELT ) /S R d e l t -

= 0 for Frequen c y or Delay mode.

0nDELT ^ C*e**a S'9 nai rmS n0ise *η ^ ν ·

A Trigger Sig nal Sweep Jitter = (eng + en A)/SRA.

enA = A sweep trigger signai rm s nois e in div .

1-8