Hewlett-Packard 1980 A/B, A, B Oscilloscope Measurement System Operating and Programming Manual

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PRELIMINARY
OPERATING AND PROGRAMMING MANUAL
SERIAL NUMBERS
This Manual applies directly to instruments with serial
numbers prefixed 1947 A. For additional information about
serial numbers, refer to INSTRUMENTS COVERED BY
MANUAL, in Section |.
P. AUSTGEN
M. HARMS
J. HARTZLER
D. JOHNSON
J. SCHEETL
J. VIVEIROS
&copy; COPYRIGHT HEWLETT-PACKARD COMPANY COLORADO SPRINGS DIVISION 1980
1900 GARDEN OF THE GODS ROAD, COLORADO SPRINGS, COLORADO, U.S.A,
ALL RIGHTS RESERVED
OPERATING AND PROGRAMMING MANUAL PART NO. 01980-90902
Operating and Programming Microfiche Part No. 01880-90802
Operating and Service Manual Part No. 01980-90901
Operating and Service Microfiche Part No. 01980-90801 PRINTED JULY 1980
de, A
SAFETY CONSIDERATIONS
GENERAL — This is a Safety Class I instrument {pro-
vided with terminal for protective earthing).
OPERATION — BEFORE APPLYING POWER veri-
fy that the power transformer primary is matched to the
available line voltage, the correct fuse is installed, and
Safety Precautions are taken (see the following warn-
ings). In addition, note the instrument’s external mark-
ings which are described under “Safety Symbols.”
WARNINGS &Euml;
Servicing instructions are for use by service-trained per-
sonnel only. To avoid dangerous electric shock, do not
perform any servicing unless qualified to do so.
BEFORE SWITCHING ON THE INSTRUMENT, the
protective earth terminal of the instrument must be con-
nected to the protective conductor of the (mains) power
cord. The mains plug shall only be inserted in a socket
outlet provided with a protective earth contact, The pro-
tective action must not be negated by the use of an exten-
sion cord (power cable) without a protective conductor
(grounding). Grounding one conductor of a two conduc-
tor outlet is not sufficient protection.
If this instrument is to be energized via an auto-
transformer (for voltage reduction) make sure the com-
mon terminal is connected to the earth terminal of the
power source.
Any interruption of the protective (grounding) conduc-
tor (inside or outside the instrument) or disconnecting
the protective earth terminal will cause a potential
shock hazard that could resuit in personal mjury.
Whenever it is likely that the protection has been
impaired, the instrument must be made inoperative and
be secured against any unintended operation.
Only fuses with the required rated current, voltage, and
specified type (normal blow, time delay, ete.) should be
used. Do not use repaired fuses or short circuited fuse-
holders. To do so could cause a shock or fire hazard.
Do not operate the instrument in the presence of flam-
mable gases or fumes. Operation of any electrical instru-
ment in such an environment constitutes a definite
safety hazard.
Do not install substitute parts or perform any unautho-
rized modification to the instrument.
Adjustments described in the manual are performed
with power supplied to the instrument while protective
covers are removed. Energy available at many points
may, if contacted, result in personal injury.
Any adjustment, maintenance, and repair of the opened
instrument under voltage should be avoided as much as
possible, and when inevitable, should be carried out only
by a skilled person who is aware of the hazard involved.
Capacitors inside the instrument may still be charged
even if the instrument has been disconnected from its
source of supply.
SAFETY SYMBOLS |
Instruction manual symbol: the pro-
LN duct will be marked with this symbol
when it is necessary for the user to
refer to the instruction manual in
order to protect against damage to
the product.
Indicates hazardous voitages.
Earth terminal {sometimes used in
manual to indicate circuit common
connected to grounded chassis).
| E The WARNING sign denotes a haz-
| WARNING В 4 It calls attention to a procedure,
WE ractice, or the like, which, ifnotcor-
rectly performed or adhered to, could
result in personal injury. Do not pro-
ceed beyond a WARNING sign until
the indicated conditions are fully
understood and met,
ae a ah an ate ae al Ee EL ie me im dn ne
че =
The CAUTION sign denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like,
which, if not correctly performed or
adhered to, could result in damage to
or destruction of part or all of the
product. Do not proceed beyond a
CAUTION sign until the indicated
conditions are fully understood and
met,
Al ANOS AAA AAA
TUNA
Model 19808 Table of Contents
TABLE OF CONTENTS
SECTION 1
GENERAL INFORMATION
introduction... .......e serra. acccderori e nicoredrarerara, Cer eee ae Cet 4 a a aa 4&raquo; . 1-1
Specifications .............. uadiccoararecooararerervorerrereaoredrorrrerecearecaro eee es. 1-2
Safety Considerations reas y rrooreerernrorreayeocenaravnerea. Cree aa aaa 4-2
Instruments Covered By Manual. ..... Ce RR RK Cee Ce 1-2
DESCrIiption .... 0080404044 4404 4 4 ad a va eu an 40
OP IONS. vit ee cee ee Lea 4 4 4 44 A 8 Rad ae a ae 40 0 AE ere ear 1-3
Electrical Options eK ieee Cee eee eee 1-3
Mechanical Options .......... coon...
Hewlett-Packard Interface Bus (HP-1B]
Compatibility... ..... ciara. Ca
a ФФ &sect; + 4 &sect; 4 + + x ох ов оной от + F F #% Fk &amp; &sect; * &sect; яя ни кк a Fr 4 F 1 wv &yen; A BE 4 4 F F &yen; FF * # #+ + 6 E a 1-3
Hi 15 Address 112010110011 14 A La Ra aa a La a La eue 4 : F F un &yen; 4 an xr wv a2 a 4 Fd + 3 FF Ft FF * 4 + &yen;F&yen; F EB 4 5 F BE BE 4 + F * a F&amp;F 7 4% 7 # 1 EB 4 F FE EF FF OF &yen; + 1 |
ч FF Wm FF ти я &reg; 4 4 EB EE FF F ENE 4 ss Ts Ts ss ss EH 4 EH 4 FF 4 1 1 #6 &reg; FF om FF 4 &sect; 4 FB 4 mn = F&amp;F 4 wor dd FF ка жа т ниче i |
Equipment Available. ........co iii 00&raquo; т чтят чи bu += 4 4 mE FF FB FF i % FF &amp; 4 w &amp; 74 FEF &yen; 4 4 &yen; Lr 4 EF FF + + F F 3 4 * * + % 4p fF + 4 #F F 24 2 F F F &yen; k + 1 |
* 4 + PT FR Far 4 к оч ото 4 % ww &amp; ww &amp; + 4 4 ово BE 4 4 &reg; + F =F 7 т тов + ково ооо + &quot;++ 1 |
Accessories Supplied... .. AAA AAA AS
Recommended Test Equipment. ......... cvs.
SECTION li
INSTALLATION
Introduction. ........... oii... et KK RR sa 0 SA ea 06 Cae enreda 2-Й
inmal inspection .......... o eeerrcererarerr sore arerroaavorareocecarenr Cerner Cee e. 2-1
Preparation For Use .....1120 00214010 a sea aa a ea a er aa ee eee Cee rare 2-1
Power Requirements ........... Ce ree eee eae er are eee aa eae 2
Line Voltage and Fuse Selection ................. Ce re eee eae Caen Cena rea. 2-2
AC Power Cable ..........eoe.erereraorereadaorere oran Cer eee, Cea A Re
HP-18 Address Selection ...
Mating CoNNECIOrS Lo ot ir i tite eee eas arroces aaa Cena. 2-4
Ce eee ee ee eee. QE
HP-IB Interface Connector vivir iii eee ieee eee ees Ce eee ae Cea eee. 2-4
Coaxial Connectors.....4444144144 0444000
Chassis Ground .........eesere-e0o0rieerrerrarereraraorervora. Cree Cena arica ... 2-4
Operating Environment ......2 20000 1400 ea 4 a ee a a aa a aan aa ea au RAS RE eddie AE
Bench Operation ............ o eeeence..
Rack Mounting....... — e serrerirrrreor a arraoirereraoaoacaraonroecrar a aras aa oa. ae ea 2-7
Storage and Shipment........ enana, Ce re re Cea Cee eee ден. 2-7
Environment 122440080004 0 eens Ca : ..
Packaging ........ ee ee ree eae re eee ee aaa ee eee enredo erre 2-7
Original Packaging ............. iia... Cee Ce eee eee J ине, 2-7
Other Packaging ...................... Ce ee ea Cee Cee aaa 2. 2-7
НН
Table of Contents
Detailed Operating Instructions 002000000014 a 0 re aa aa nc caen e 6 RE enana Cee eee
Remote Operation. ...... Caran eerie eee Creve ; aera Cree
Remote Operation, Hewlett-Packard Interface Bus .................... en. Cee Ceres
Detailed Operating instructions ,........._.eexeeserire rie re ena cederereree a. RAA
Codes and Format Summary ...... ”e.e.enen. eo ireoreci va amen aadercrcore redonda vreAecame nn. Cree ee
Notation Conventions and Definitions......... eee Cee RR Cee Crees
Орега1юг'$ СпесК&reg;........, к... 2.2... 5. Ch eae vara ere eee aaa arica к,
Operator's Calibration and Adjustment........... Cee Cea e Chae enma. e...
Operator's Maintenance ...... Crea Cee ae eae RAA AA AAA AAA AS
General Operating instructions............... eunansorooorerearerenar ea aayoecacariorierecrverracerrecora ma
POWEr-onN. ............ . enero Cea Cre rea eee eerie eee rien,
Simplified Operation. ........ e. eee. Ce eae Cae aa ea
Getting Acquainted kxercise ........ Crea ana Cree Ch eae eee
Using Autoscope ......... Ce eae Cera уевененее area 2000 aaron Chee aes Cree
Keys and Indications ............. Crea | Ce hr eee Ce eee
Changing Values. ............... Ceara .. ao. Chea ee e... .. na
Using the Trigger Controls ............. urereroraroerenaro caca nena Ce nea ке Cee teases
Usind Delayed Sweep 02004000 0544444 ea a ae es ane 00 Crea Ce ere eee eee
Using Delta Volts. ................... Cee er ere a ea aa 000 e eee Cera aia
Using Delta TIMme.........eecereednonvao adeoociricererervr e arena cararo te eee aes e...
Using Soft Key Menus.......4..240000000 Pa eee ee an RR RAS Cee eee
Using Save/Recall .............. Ce ee ere ea Creede Cera eee
Panel Features........ Cte a eae Cree e 4 Ceres Cea Cee
Remote Operation, Hewlett-Packard Interface Bus .............. aerea eae enn encon
HP-I1B Compatibility .............. Ce ea Ce ee ee ee ea
HP-IB Status Display... ii AD Cee eee Cees .
Remote Mode... ... iri sr es ereorerereneen eo Cees evocan. adidararedrarerce ras
Remote Capability .......... ese. La ee aa da dada nee La a aa ane PS Cree ae
Local-to-remote Mode Changes ........ e. .e.. een eaderreroarrererere, nadar. ende. eee
Local Mode .. RK RAA AA nana nea. eee eae
Local Capability &laquo;oi reat eee RR eee eee RE
Remote-to-local Mode Changes ............. RAR Cee ... nadaa Cr eee eae
Locai Lockout 0402440004 4440 0 a eee ee eee .. eee Cee Cees eerarea&oacute;.s
Addressing ..... edeidora nera e eaoriorocoredareaararderandeeres Cree ce Cees Cree ea
Listen-oniy Mode .............. RAA AAA AAA CL 4 a a 4 4 4 A a da eee aa 000 .. - reas
Talk-oniy Mode ............e...eeexeraas Cen ea Ce eee
НР-!В Turn-on Default Conditions .........eceevr&iacute;esreraraae eee vacuno. Cee Crees
Data Messages oo viii ir KR RR RK , andan. aida. a aa ee a aa 00 aa ee
Receiving the Data Message ..... er и, aan Lacan&raquo; : Chee names
introduction...
+ аж каче
TABLE OF CONTENTS (Cont'd)
SECTION iil
OPERATION
Model 1980B
Operating Characteristics .............. reece eee PR a da ae 06 Cree e... TEC
Loca! Operation EP AA FEE E AAA 4 &amp; 4 + F 4 4 * E&raquo; в я зв каж оз к +* EE 1 FE ат FF KF RB +4 &yen; 4 2 = mE 4 FF + - + * к + + т нь + + т от ов в + +. ++
Simplified Operation, к нож книжн че ня кк + + + + + * + + * + + + ++ + + + + + +# wF кк жк тн + + FF ++ - + | + kur к. .
Getting Acquainted. .............
Pane! Features...
a 4 + + +
+ &quot;+.
&laquo;+ + 1 а
rt 4 tr 4 #4 % 4 4 в + + ни EH F 4 4 x LL + +
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-2
3-2
3-2
3-2
3-2
3-2
3-3
3-3
3-3
3-3
3-4
3-6
3-7
Model 19808
TABLE OF CONTENTS (Cont'd)
Input Data Message Format...
Program Order Considerations ............. Ce eee bee eee RAA ARE Cee
Program Code Format ...... iii i a a ee sea ee see eee ne&raquo; PN Chee
Sending the Data Message ............... Cee Cee Cea Cea Cee 6
Output Data Message Format ........ i iii i Cee tren Cree ea
Learn Mode ........... eavrdcerereraaorearernecaaerarcanreareeonve nv G Ch eae ae Certara e.
Receiving the Clear Message ............... Ce eee eee Ce Cae
Receiving the Trigger Message ............... Cae naa Cee Cee , ‘es
Receiving the Remote Message 004444044440 4e 4 a ae ea see ea ae ec 0 SA инненое, Cae ee e...
Receiving the Local Message .......... hee era 4 0e ea A4 4 ae ee a ea aa eee = TO Cee к,
Receiving the Local Lockout Message. .................. Cn A Re 4 Aa 444 aa na 1000 0 Ce eae Cee
Receiving the С1еаг БоскомМ!/ Бе! оса! Меззаде...................... Cea RAA ноное, ee...
Receiving the Pass Control Message............... Ce eee RAA ETE avec
Sending the Require Service Message 004441444444 0 4e a sa a ea nee 0 . Cee Chee aaa aerea.
Sending the Status Byte Message .........eseeervecerrconrenerer ne ener e. Crean AN
Sending the Status Bit Message ir erence ene. RAA AA RES
Receiving the Abort Message ........ Cee eee a es ae 06 RER KK RER Cee eee Care
Operator's Checks. ............ e enarverecordaooaeradra roer aro ererararerero Cee ena eee ea
Confidence Test............—.eesxcererecerec.. aeaverecrere eres aaveredrerare vere nene, Cr eee
Memory Check. or ee ea RAA AAA AAA Cee ere Ceres e.
НРАВ 1/0 Check .......... 2... 0000... e уеоинеовновованаавьанинь Ce eae nana ee...
Address Recognition. ...... —..eeecrrrrarerrerrrer KR KR 000 0 e... eran: TEO
Remote and Local Messages and | #2 UE en en n an Lee
Receiving the Data Message ....... Cee Cae Cree eae RAA PEN
Sending the Data Message re e ee 6 Cera TO cos Cee
Local Lockout and Clear Lockout/ Set Local Messages. ............. avena. TU Cee
Abort Message. ......... Cee ee eee eee Cee aes Cea nea
Reguire Service Message ..........e seceoresaarerenrerecer ere reco... aerea arado Cee 0
Status Byte Message .......... Ce re ee ea Ce eee Cea Caen
Operator's Calibration and Adjustment. .... coo iret iia a ea ee&raquo; Ce ee eee TO
Delay Time Self-cal ......... 2009000 rrererecendivarennorerarereo. eee ena Ce ene ев
Vertical Balance Self-cal................... Ce ere 0 aaa PN
CRT Adjustments. ..... Ce re ee ee ee ea eae Ce eee eee
Probe Compensation 1.0.0000 KK KK KRANK nera. RE ‘ AP
Detailed Operating Instructions &laquo;ovr iii ieee i ee inan ee re eee Cees
Using the Detailed Operating Instructions... oo. ooo ie irre Cree Cee eee .
Advisory Message rer RR PI era 4 4 A Re aa ea ae 000 RAA ee. неее .
AUtoscope .....e._rerorvcarerenr ear ergan en , eee Cee eee aaa нее
Bandwidth Limit 22. ee reer Cena ae enero ...
Calibrator Level ...........—.—... Ce 060 Ce ee ere riada. eee Coe
Character Generator .... asrerorrareo: ero ererarrernorrerecdacerecare, Chae 2. .. E...
Control Knob..............,0,0,0;00serereoreaorerrracerrererredreaeaarecnvea. ce Cee pena nea
Delay........emrcecrorererereocoreaioaeracrrorryararererorrersoran anna ena oredarerverrrore road. г,
Delta TIMme,.........oeeeeererdaererarereveeneoren Ce eee eae Cae e. Cee eee ‘
Delta Volts ...... arena re nea Cee Ce ee era нанененее RR avena. anda ere
Error Messages ..........e... eee ne ee etre rete KR Ce ease penado неее
Horizontal Mode oi ei ee eee une. eanerecia .. enero
Eu + # EU 2 10. + = UT FF #4 EH 1 1 7 EF + + 4 4 4
Table of Contents
Table of Contents Model 19808
TABLE OF CONTENTS {Cont'd)
Horizontal Position iri iii eee ie eae aaa Cee PG oF
HP-B Address &laquo;ovo eee eee eee ee ee ea &agrave; Ce he eee Cetera... 3-88
HP-IB Status Advisory 00 icici 0 re eee Ce er ee re ee ee 3-70
HP-IB Syntax Errors... ovine eens Cree aa tre ee er ee. 3-72
Inibalize ........ .. ......... Cee PAS RAS RAR RAS e... 3-73
ee A Ra REA Aa Ra a ea A sea a ae cee. 3-75
Intensity, Characters and Lamps ...... RE LA A AA ee eee ee ee ee Ceara ae. 377
Key viii ec Ce ere aa Cee ee ee aaa ee т . 3-79
Learn Mode ....................... ee er ee tr hea Cen Cre eee .. 3-82
Power-on Sequence and Default Conditions... Cee er er be ee ee ere ee ene а 3-83
Reading Values Via HP-IB....... e... are... naa Le ANR 8 4 8 RR RR ane un Cee... 3-84
Ce a ee ea aa a a a aa ae a sa ua e ne LL aa area e 4 41110 3-86
LL AAA A A ee ee Cea 3-88
Separation, Dual Lee Ch ne ee ee eee Cee 3-90
Service Request Condition i ir tree ee tree ee ee tree eee RR Ce eee ... 3-91
PES Cee eee eee 3-83
Sweep Mode, Delayed... oo ori rerredeaooona. ee ee ee eee La da aa aa aan&raquo; ..…. 3-96
Sweep Mode, Main iii Ce he HERR RR KR AA . 3-98
Ce eee Cee. 3-100
PS Le Aa Kara 3-102
PS Cee eee 3-104
Trigger, Delayed Sweep ................... Ce ee a ee ea a ae a a na a a nan e 0 RAA AAA AS ss... 3-107 &Agrave;
ee Cc 3112 A
Ce ea Ce eae 3117
Trigger View &copy;... aa Ce ee ere RE Crea авовая Cen... 3-120
Vertical Coupling................ eee. ee ae. TUT 3-122 A
Vertical Deflection Factor ...... ee ee ene. Ceara cee. 3-125
Vertical Mode .................. Ce ee eae ee KG Cee eee e. 3-127
Ce a 4 aa aa a aa ane RAA Cee 3-129
AP-183 Codes and Format SUMmMany oo rine ieee nee ee KR a aa en aa aa aa ae&raquo; cee. 3-431
HP-IB Capability.............. ee... Ce ee e nandocorcarcreraTraren Ce eae Cee eae 3-131
HMP-IB Status Advisory ..... ee ee ee a Cn eae ea aa. 3-131
Address ................... re reer eee as Ce AAA Ce aaa ‚... 3-131
General input Data Message Fermat.............. averodoariavoaoorereorerearrareera, vary oacodarane, ‚ 3-131
General Output Data Message Format 2202000444 a aa eee eerie Cee Cervera... 3-132
CP Cee eee Ce — 3-132
Default Conditions .......... Cr rer ea aa Cree ae cea. 3-132
Status Byte ....... La aa ane Cee ee creoareraceconerdarordandrrracarereor eee aaa reed. 3-132
Notation Conventions and Definitions. ovr irr ir cee ee eee ee eee eee Cee eee 137
+
+
e
+
+
+
e
instrument Status. .14144 4444 44 4 4e 4 44 &agrave; 4 A4 a ea ea a 4 a aa aa &agrave; Chere aa
intensity, Trace Li ii iit ite teat aaa a...
Save/Recall ................. Ce eee KR
Scope Mode ..... ee Ce
Soft Key Men&uuml;s iin. SA
Sweep Speed, Delayed ....... Crees Ce ee
Sweep Speed, Main ............020,20200 0...
Text Display ........ eee Zdareereraai acens Cee
Trigger, Main Sweep .....
-
+
=
x
+
+
+
+
+
+
+
+
Trigger Flag ............ e. .evee. envias area
Vertical Position ........... 0... a La Lana ae
Return to Local ........ ._... . .. ..
Sections IV through VIII
PERFORMANCE TESTS
ADJUSTMENTS
REPLACEABLE PARTS
MANUAL CHANGES
SERVICE
These sections are bound separately with a separate table of contents.
Model 19808 | List of HHustrations
Figure
1-1
2-1
2-2
2-3
2-4
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
LIST OF ILLUSTRATIONS
Title | Page
HP Modei 1980B Oscilloscope Measurement System and Supplied Accessories ,.........e0eeeerenveco. 1-0
Line Voltage Selection Switches i i ie tt te nce ere a a ea sa ae&raquo; 2-2
Power Cable and Plug Part Numbers ,............0000a.rieararieneareracrerac—erdcrrecerecoreore ramo 2-3
Soft Keys and HP-IB ADDRESS MODE CRT Display .............—... Ce ee ee ee ee 2-4
Hewlett-Packard interface Cable. ......... ee ea ee a 4 0 2-6
Front-panei Features see RER it tt RER RR KR KR REKEN 3-4
Getting Acquainted Exercise Setup oi it eee eee ee eee 3-6
The CRT Readout oo itt i ttt tts tet tes eres te et tt tesa sence 3-8
The OPTION MENU Soft Key Definitions &laquo;oui i teeter eee eee ieee 3-11
Display Panel Features &laquo;ee ee eee 3-13
СВТ Реаншмге$ ............. 5..5. te tte ets te es ie ete ett set KR er ee a es 3-13
Control Panel Features vein iris J ara dear oe nava corrrrav&oacute; 3-14
Voltage Panel Features .............0_..esrevecereroererararvrereeroorraroororarcoadarorrarrereocare 3-15
Time Panel Features ...........oeeeccesicrsroreo er e ea AD nada reano no nancare dan aa 3-16
Rear-panel Features. ..........oeee.ecernarsrareresrrerercerrr.orrorreroascrenrereeraredorerrereceac. 3-17
HP-IB Status Advisory ..........eenedeeaieaeeaaairieaaroccoredraead&oacute;eneanovearcaaordetosrrvroracorera 3-20
1980A/3 Input Data Message Examples. .............0.s000e0resrrece can eaveracerr2serrorcareerer a e. 3-26
The Status Byte and the ROS Mask ............... K a ee A Aa ae ea A a AAA Ve 40 | 3-29
Serial Pol! With Reguire Service Message Disabled (ROS Mask Value = O) L....222 00024414 ae as een 6 3-30
Serial Poll Using the Require Service Message (ROS Mask Value &gt; O) ............- reservorio. 3-31
Divider Probe Adjustment Display .............. 2. rere rr: aaearenrear rra tcarercerenrecerorecvereraro 3-41
Typical Advisory Message DIsplay .............e0se0ric:; error acie. sr araareanreciorerorrorecarce ra 0 3-42
The 1980A/8 CRT Readout ..............0200&iacute;xerierrerer ever ereciorrrarrereererrecacroorrorooarear — 3-52
The HP-1B Status Advisory .........e se erecedrarea rear ev eaoardaneaaradvorrreovrererace ,arnecarradrora 3-70
Text Field in the T98SCA/B CRT Display &laquo;viii i i trite eee ec 6 C8 a SA a eee ee&raquo; 3-104
Maximum Signal Input vs Frequency 21 kHz .................... ea 3-108
Maximum Signal Input vs Frequency =1 kHz .......... ER eee eee ea 6 3-113
Latched Mode Trigger Flag State Examples.. 1.221244 4444 444 48e 4 4 ee a 4 4 04 4 0 4 ee re de eee a aa a ae 0e 40 3-117
Dynamic Mode Trigger Flag State Example 1404441114 La A LA AI Aa Re ea 44 eee A a AA ee eee ea ee ee 0 3-117
Maximum Signal Input vs Frequency 1 KZ LL 00214446 44 AR A4 A A4 A4 44e 4e A 4 ee 4 a 6 CR ea a sa 0 3-123
vit
List of Tables
Table
1-1
1-2
1-3
1-4
2-1
2-2
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
3-26
3-27
3-28
3-29
3-30
LIST OF TABLES
Titie
SPEC CLIN Lit ee eee Cananea
Recommended Test Equipment. ..........e e e.e.eorerre roses HR
Recommended Test Accesories.... 2204444444 44444 8 au 4 ea 8 ae KK KK
„Alternate Test Equipment... 120104044444 44 4 68e 4 4 48 44e a ae 4 ae a ee a a 0 ae aa e 0
Line Fuse Part Numbers ... 2200400 4444 644 4 4 44 44 ea a KR RK KR
ASCH Address Codes to Decimal Eguivalents ...........0.... eee A
Operating Characteristics .. ....... 7.002. reerre.eer arar rororarr&oacute;errorra,
Detailed Operating Instructions Index, 2... eres ree resaredo en |
HP-IB Message Reference Tabie...... ........0.00d00rereraconacarieaonao ra,
Symbois Used in HP-IB Status Advisory... ......_—..enrceeeerre.era.. RAA
Typical Processing Times for Various Commands ....22244 4041404404 00000 0
Confidence Test Error Messages 112020002044 4 ea aa aa ea aa a aa a a ae aa ae nn 0
Advisory Message Description 14.000000 KK i i a ees
Autoscope and Selective Autoscope Preset Conditions oo oie...
Delay Time Step Resolution Hront-panell. ooo. vin creer aeeen es
Delay TIME ACCUTACY 1224224 44484 44e 4 4e ee AA ett eaten eee tata
Hardware Error Codes... 02400424 4444 4 44 4 444 ete et ete eee 0
Symbols Used in HP-iB Status AdvISOIY. 1122200014 4444 44 a 4 a a a 4 ea ea a a eau +
НР-1В Syntax Errors oti eis ee reste terete a treats
1980А/В Initialized Slate... oii ii ee
Key to Keycode Conversion Table. oii RR RK KR Ka
Keycode to Key Conversion Table............ em eee. esa u:reeenecayano eva ea
Data Message Output Format ........ 2.2... aairererierecordacraoari vea.
Functions Stored in Save/Recal! Registers ............eeeeeeenvareec irene
ROS Mask Value for Service Request Conditions .. 122202044440 4 aa aa ea a ea 00
Soft Key Menu Tree ........ 2... 0,0. .r&iacute;eereoreerrereacacrrerorarorarares
Special Text Attributes eK RER RN KR
1980A/B Modified ASCIL Character Set. ii eee
Trigger View Display Timebase 11124110 04 044444 4 4 a &agrave; 4 ea a a aa a a aa ea aa anne
The Status Byte and ROS Mask LL. i i ee ernie,
Program Code Prefix To Function Cross Reference... oo eins.
Program Code and Format Summary ... 12010444 48 4 44 aa 444 aa 4 aa aa a a aa aa ee
1980A/8 Key Codes itt ee KR ct eee ee
1980A/B Text Character Set &iquest;Modified ASCII}
vili/ (ix Blank)
EA AE AA EE ETA в я к жа жк як тк E
НР-В бут! ах Еггог Собев...................... SD
Commonly Used Code Conversions &laquo;oti ee ieee eins
Model 1980B
1-0
General information
Madel 1980A/B
Figure 1-1. HP Model 1980B Oscilloscope Measurement System
and Supplied Accessories
Model 1980A/B. General Information
SECTION |
GENERAL INFORMATION
1-1. INTRODUCTION.
From the standpoint of operation, the Model 1980A and Model 1980B Oscilloscope Measurement Systems are virtually
identical; the major difference is in physical configuration. The 1980A is a cabinet model for bench operation. The 1980B is
configured for either rack mounted or bench operation. In this manual, the two models are referred to collectively as the
1980A /B. Where distinction is necessary, the two models are referred to separately.
The 1980A/B Operating and Service Manual has eight major sections. The manual contains the following information:
Section |, General Information: describes the instruments documented by this manual, it also provides a basic description of
the Measurement System which includes options, accessories, and specifications.
Section H, Installation: provides information about initial inspection, preparation for use {including HP-1B address selection
for remote operation), and storage and shipment.
Section Il, Operation: provides detailed operating information for the instrument, including remote (HP-1B) operation and
operator's checks and maintenance. Also included is a front-panel description and a “getting acquainted” exercise to
familiarize the first time user with the basic Measurement System operating procedures.
Section IV, Performance Tests: presents the procedures required to check the performance of the instrument against the
critical specifications in table 1-1.
Section Y, Adjustments: provides instructions for properly adjusting the instrument,
Section Vi, Replaceable Parts: provides ordering information for all replaceable parts and assemblies.
Section Vii, Manual Changes: contains manual change information necessary to docu ment all serial prefixes listed on the
title page of this manual. In addition, this section also contains recommended modifications for earlier instrument
configurations. |
Section Vill, Service: provides the information reguired to repair the instrument.
This Operating and Programming Manual contains Sections 1, H, and lil only, The Service Manual contains the remaining
sections, A second copy of the Operating and Programming Manual is included in the manual set; it should be kept with the
instrument for operator reference. Additional copies may be ordered separately through your nearest Hewlett-Packard Sales
and Service office. The part numbers for the complete Operating and Service Manual and for the Operating and Programming
Manual alone are listed on the title page of this manual.
Also listed on the title page is the part number for a microfiche version of the complete Operating and Service Manual. The
microfiche are 100 X 150 mm (4 X 6 inch} microfilm transparencies of the manuals. Each microfiche contains up to 96 photo
duplicates of manual pages. The microfiche package also includes the latest Manual Changes supplement.
1-1
General Information | Model 1980&Acirc;/8
1-2. SPECIFICATIONS,
Specifications and supplemental characteristics of the 1980A/B Oscilloscope Measurement System are listed in table 1-1.
This instrument will meet the electrical characteristics listed following complete calibration as given in the Adjustments
section of the manual. These electrical characteristics apply over the ambient temperature range of &Ocirc; to 55&deg;C except as
otherwise noted. Warm-up time for given accuracy is 30 minutes.
1-3. SAFETY CONSIDERATIONS.
| WARNING E
To prevent personal injury, observe all safety precautions and warnings stated on the instrument and in the
manual,
This product is a Safety Class | instrument (provided with a protective earth terminal). The 1980A/B and ail related
documentation must be reviewed for familiarization with safety markings and instructions before operation. Refer to the
Safety Considerations page found at the beginning of this manual for a summary of general safety information. Safety
precautions for installation, operation, and servicing are found in appropriate locations throughout the Operating and Service
Manual. These precautions must be observed during all phases of operation, service, and repair of this instrument. Failureto
comply with these precautions or with specific warnings elsewhere in the manual violates safety standards of design,
manufacture, and intended use of this instrument. Hewlett-Packard assumes no liability for failure to comply with these
requirements,
1-4. INSTRUMENTS COVERED BY MANUAL.
Attached to the instrument is a serial number plate. The serial number is in the form: 0000A00000. itis in two parts: thefirst
four digits and the letter are the serial number prefix and the last five digits are the suffix. The prefix is the same for all identical
instruments: it changes only when a change is made to the instrument. The letter in the prefix designates the country in which
the instrument was manufactured. (A=USA; G=West Germany; J=Japan; S=Singapore.) The suffix, however, is assigned
sequentially and is unique to each instrument. The contents of this manual apply to instruments with the serial number
prefix{es) listed under SERIAL NUMBERS on the title page.
An instrument manufactured after the printing of this manual may have a serial number prefix that is not listed on the title
page. This unlisted serial number prefix indicates the instrument is different from those described in this manual. Manuals
accompanying these newer instruments include a Manual Changes supplement. The supplement contains change
instructions for the entire Operating and Service Manual.
In addition to change information, the supplements may contain information for correcting errors in the manuals. To keep
your manuals as current and accurate as possible, Hewlett-Packard recommends that you periodically request the latest
Manual Changes supplement. These supplements are identified with the print date and part number that appears on thetitle
page of this manual. Complimentary copies of these supplements are available from Hewlett-Packard,
For information concerning a serial number prefix that is not listed on the title page or in the Manual Changes supplement,
contact your nearest Hewlett-Packard Sales and Service office.
1-5. DESCRIPTION.
The 1980A/B Oscilloscope Measurement System is a complete two channel 100 MHz oscilloscope. It features 2 mV/div
deflection factor, two independent 5 nsec/div sweeps, main and delayed trigger view, and both delta time and delta voltage
functions. Measurement capabilities can be extended by adding internal options and plug-in Expansion Modules,
1-2
Model 1980A/B General Information
In addition, the T980A/B has these special features:
АН functions are programmable via HP-IB (HP's implementation of &iexcl;EEE Std 488) for automatic or semi-automatic
measurement applications.
* Autoscope function presets the 1980A/8, then autoranges trigger level, deflection factor, and sweep speed. it provides
a one keystroke setup for most input signals.
* Save/Recall registers can be used 10 save as many as eight complete instrument states for recall in repetitive
measurement procedures.
* Calibration can be performed on-site, without removing covers and requires little or no test equipment. Internal
reference signals are provided and complete, step by step instructions are displayed on the CRT,
1-6. OPTIONS,
1-7. Electrical Options.
Option 080: Supplies two, TOCBOA 10:1, 1 M (3.3 #t) probes instead of two 10081A probes.
Option 082: Supplies two, 10082A 10:1, 3 M (10 ft} probes instead of two 10081A probes.
Option 083: Supplies two, 10083A 1:1, 1 M (3.3 ft) probes instead of two 10081A probes.
Option 084: Supplies two, 10084A 1:1, 2 M (6.5 ft) probes instead of two 10081A probes.
Option 020: Deletes probes.
Option 150: Supplies HP Model 1950A Two Channel Vertical Plug-in installed in the 1880A/B.
Option 810: Supplies HP Model 19810A Key Sequence ROM installed in the 1980A/8.
1-8. Mechanical Options.
The following options are available for rack mounting the 1980B. The rack mounting kits can be ordered separately from the
nearest Hewlett-Packard Sales office using the part numbers given in the descriptions.
Rack Flange Kit (Option 908). This kit contains flanges and hardware for mounting the Measurement System in a standard
rack of 482.5 mm {19 inches). Order HP part number 5061-0077.
Rack Flange and Front Handle Combination Kit (Option 909). This kit contains flanges, handles and mounting hardware (the
flanges are different than the Option 908 flanges). Order HP part number 5061-0083.
Standard Slide Kit (Option 0091. This kit contains rack mounting slides and hardware for mounting the Measurement System
into HP rack enclosures. Order HP part number 1494-0017.
1-9, HEWLETT-PACKARD INTERFACE BUS (HP-IB). CENT
1-10. Compatibility.
The standard 1980A/B Oscilloscope Measurement System has an HP-iB interface and can be used in automatic system
applications driven by an HP-IB equipped controller or computer. The instrument is fully programmable via the HP Interface
1-3
General Information Model 1980A/8
Bus. The instrument's compatibility with HP-IB is defined by the following list of interface functions: SH1, AH1, T5, TEO, L3,
LEO, SR1, RL1, PPO, DCO, DT1, CO, E2. For an explanation of the compatibility codes, refer to IEEE Std 488, &quot;IEEE Standard and
Digital Interface for Programmable Instrumentation” or the identical ANSI Standard MC1.1.
For more detailed information relating to remote operation of the Measurement System, refer to Remote Operation, Hewlett.
Packard Interface Bus in Section Il of this manual.
1-11. HP-IB Address.
The HP-IB address “7 15 preset at the factory before the instrument is shipped. This address may be displayed or changed
from the front-panel when the Hi - lo HIRE MOLE menu is selected. This procedure is described in Section lf. The &quot;HP-IB
Address” Detailed Operating instruction (Section HI) provides a more complete description of addressing considerations,
1-12. ACCESSORIES SUPPLIED.
Accessories supplied with the Measurement System are in figure 1-1. Included with the instrument are: One blue light filter,
one 2.3 M {7.5 ft} power cordset, one Expansion Module Panel Cover, and one complete Operating and Service Manual. A
second copy of the Operating and Programming Manual {sections [-II) is also included.
The power cable and line fuse are selected at the factory according to the voltage available in the country of destination. For
the part numbers of the available power cables, refer to paragraph 2-6, AC Power Cable, in Section HL
1-13. EQUIPMENT AVAILABLE.
The following accessories are available for servicing the Measurement System:
64 Pin Hybrid Extender. Aids troubleshooting circuits containing 64 pin hybrids. Order HP part number 5081-7663.
Plug-in Extender. Required to service plug-in Expansion Modules, Order HP part number 01980-63901.
1-14. RECOMMENDED TEST EQUIPMENT.
Table 1-2 lists equipment required for maintaining the 1980A/B. The Critical Specifications column describes the essential
requirements for each piece of test equipment. Other equipment can be substituted if it meets or exceeds these critical
specifications.
The Suggested Model column may suggest more than one model. The first model shown is usually the least expensive, single
purpose model. Alternate models are suggested for additional features that would make them a better choice in some
applications. For example, reasons for recommending an alternative model might be:
* HP-IB programmability
zum OT -
*
Muiti-function capability {that is, one model can replace two or more single purpose models)
Table 1-4 presents the advantages of the alternate suggestions.
1-4
Mode! 1980A/B
Genera! Information
Table 1-7. Specifications (Page 1 of 4}
OPERATING MODES
Voltage vs time {Vvs TT); channel 1 vs 2{1 vs 2}; monitor
mode for logic state display with HF Model 1607A
IXY ZL)
VERTICAL DISPLAY MODES (V vs Г}
Channel 1; channel 2; channels 1 and 2 displayed on
alternate sweeps (ALT); channels 1 and 2 displayed by
switching between channels at approx 400 kHz rate
with blanking during switching (CHOP); automatic
selection of alternate for sweep speeds &gt;1 ms/divand
chop for sweep speeds &lt;1 ms/div (AUTO-CHOP/ALTY,
channel 1 pilus 2 algebraic addition {1+2}, channei 1
and/or 2 may be inverted; and either main or delayed
trigger signal.
VERTICAL AMPLIFIERS {2}
BANDWIDTH: 3 dB down from a 5 div reference signal
(O to +40&deg; Cj.
DC-Coupied: de to 100 MHz in 500 and 1 MO input
modes.
AC-Coupied: &lt;10 Hz to 2100 MHz.
BANDWIDTH LIMIT: iimits upper bandwidth to approx
20 MHz.
INPUT COUPLING: AC, DC, 500 (DC), Ground. Ground |
position disconnects input connector and grounds
amplifier input,
INPUT RC
AC or DC: 1 MO +2% shunted by approx 16 pF.
50 Ohm (DC): BON 73%,
MAXIMUM INPUT VOLTAGE
50 Ohm: BV rms.
1 Megohm: ac or dc coupled, 260V (de + peak ac) at &lt;1 kHz.
DEFLECTION FACTOR
Range: 2 mV /div to 10 V/div.
Resolution: 3 digits.
Adjustment: coarse stepping is in a 100, 150, 200, 300
... 900 sequence; fine stepping is a change of 1 inthe
least significant digit.
Accuracy: +3%.
VERTICAL POSITION
Range: baseline can be adjusted &pound;15 major div from
center graticule line (possible 10 div off screen).
Resolution: 0.02 major division.
Adjustment: coarse or fine slew rates.
Accuracy: {2% of reading +0.3 major div}.
AV {CHANNEL 1 OR 2)
Range: &pound;15 times the deflection factor selected for that
channel.
Resolution: 0.02 times the defiection factor for that
channel.
Adjustment; coarse or fine slew rates.
Accuracy: +4% (for a A = 10 major divisions).
CHANNEL 1 + 2
Amplifier: bandwidth and deflection factors are
unchanged.
Differential {Channel 1-2 or Channel 2-1): CMR is at
least 20 dB from de to 20 MHz with common mode
signal amplitude equivalent to 10 div and one channel
adiusted for optimum rejection.
TRIGGER VIEW
Display: internal or external trigger signal for either
main or delayed sweep. |
Deflection Factor: internal, approx deflection for selected
channel; ext + 10, 600 mY/div +20%; ext + 1,
60 mV/div 120%.
External Trigger Signal Delay: &lt;4 ns with identically
timed signals to a vertical channel and either main or
delaved trigger inputs.
Trigger Point: approx center horizontal graticule tine.
Momentary: trigger signal is displayed while main or
delayed trigger level is adjusted.
HORIZONTAL DISPLAY MODES (М vs 1)
Main, Main Intensified, Delayed, and Dual. Dual
simultaneously displays main intensified and delayed
sweep for all displayed channeis.
MAIN AND DELAYED TIME BASES
RANGE: 5 ns/div to 1 s/div.
RESOLUTION: 3 digits.
ADJUSTMENT: coarse stepping is in a 100, 200,
300, . . . 800 sequence; fine stepping is a change
of 1 in the least significant digit.
ACCURACY:
Speed Accuracy”
5 ns/div to 9.99 ns/div +3%
(center 8 divi
10 ns/div to 9,99 ms/div 13%
{first 10 div}
10 ms/div to 1 s/div +4%
(first 10 div}
*Within &pound;10&deg; C of the temperature at which the instru-
ment was calibrated. For temperatures beyond the
+10&deg; C range and within O to +55&deg; C, add 1%, from
0.5 s/div to 1 s/div add 2%.
SWEEP DELAY
Delay can be measured by elther time or a number
of events.
TIME DELAY
RANGE: 010 8.8999 s.
Resolution: displayed, b digits; HP-IB, 100 ps at any
delay, possible 11 digits.
1-5
Genera! Information
Mode! 1980A/8
Table 1-1. Specifications {Page 2 of 4)
Accuracy”
Delay or Time Interval
Sweep &lt;200 us &gt;200 us
Speed
Sns/divtol 142 ns + 0.1% of 0.05% of
9.99 s/div reading} reading)
210 ns/divi {2 ns + 0.1% of 0.05% of
reading + 1% of dly’'d | reading + 1% of diy'd
s/ div X 10 div! s/ div X 10 div
*Within one hour of a Delay Self Calibration and in
constant ambient temperature.
Delay Jitter: 0.002% of delay time; at 10 MHz + 10 kHz
0.01% of delay time.
Adjustment: Numerical, step size is related to current
delay value; Normal, step size is related 10 sweep
speed.
TIME INTERVAL (АТ)
A zero time reference can be set anywhere in the
delay range and a time interval measurement can be
made from that point.
Resolution, Adjustment, Accuracy: same as Time
Delay.
FREQUENCY (1/AT)
Calculates and displays reciprocal of time interval
measurement. |
Resolution: same as AT. As frequency increases insig-
nificant digits are truncated.
Adjustment, Accuracy: same as Time Delay.
DIGITAL DELAY
Range: O to 108 —1 events,
Resolution: 1 event.
Adjustment: coarse steppingisinat,2,3,...9, 10, 20,
30, ... 80, etc. sequence; fine stepping is a change of
1 in least significant digit.
Maximum Rep Rate: 15 MHz with a 50% duty cycle,
TRIGGERING (Main and Delayed Time Bases)
MAIN SWEEP
Triggered: specified level and slope is required to
generate a sweep.
Auto-Triggered: baseline displayed in absence of a
trigger signal; triggering is same ‘as triggered above
approx 10 Hz, |
Single: sweep occurs once with same triggering as
Triggered mode; reset key rearms sweep.
DELAYED SWEEP
Auto Sweep After Delay: delayed sweep starts at end
of delay time.
Triggered Sweep After Delay: delayed sweep can
be triggered after delay time.
Digital Delay: delayed sweep starts a specified number
of events after start of main sweep.
SOURCES
Selectable from Channel 1, Channel 2, Enhancement
Module, or External. Line frequency triggering is
also available for main sweep only. Main and
delayed trigger sources are independently selectable.
INTERNAL TRIGGER LEVEL
Range: +20 major divisions from center horizontal
graticule line.
Resolution: 0.02 major divisions; coarse or fine slew
rates. |
Accuracy: {3% of reading + 0.4 major div).
EXTERNAL TRIGGER LEVEL
Range: -1,+ 1.2 Y from ground reference; in +10, +12
V from ground reference.
Resolution: +1, 2 mV; in +10, 20 mV, coarse or fine
slew rates.
Accuracy: 2{3% of reading +40 mV); in +10 mode, (3%
of reading +400 mV.
LINE TRIGGER LEVEL
Range: #20 relative units.
Resolution: steps of 0.02; fine or coarse slew rates.
SLOPE: triggers on positive or negative slope within
specified trigger signal range.
SENSITIVITY
Internal: for deflection factors &lt;10 mV /div, at least 1.4
div of vertical deflection from dc to 25 MHz increasing
to 3 div at 100 MHz; for deflection factors &gt;10 mV /div
at least 0.7 div of vertical deflection from dc to 25 MHz
increasing to 1.5 div at 100 MHz.
External: in external +10, at east 500 mV p-p from de to
25 MHz increasing to 1.2 Vp-pat 100 MHz; in external
+1, atleast 50 mV p-p from dc to 25 MHz increasing to
120 mY p-p at 100 MHz.
COUPLING (Internal and External)
AC. attenuates signals &lt;10 Hz,
BC: direct coupled.
HF Rej: attenuates signals above approx 35 kHz.
LF Rej: attenuates signals below approx 35 kHz.
EXTERNAL TRIGGER INPUTS (Main and Delayed)
Input RC: AC or DC, 1 MA &pound;2% shunted by approx 15 pF;
500 (DC), 500 +3%,
Maximum Input Voitage: 500 (DC), 5 М rms; 1 MO, ac
or de coupied, 250 V (dc + peak aci at &lt;1 kHz.
1 vs 2 OPERATION
BANDWIDTH
Y -Axis (Channel! 1): same as channel 1 in V vs T,
X-Axis &iexcl;Channel 2): de to 4 MHz.
Phase Difference Between Channels: &lt;3&deg; dc to 100
kHz.
Defiection Factors: same as Vertical Amplifiers.
XYZ OPERATION
inputs are compatible with HP Model 1607A Logic
State Analyzer or equivalent.
X AND Y INPUTS
Deflection Factors: 0.5 V/div +20% for X; 0.4 V/div
+20% for Y.
1-6
Model 1980A/B
General Information
Table 1-1. Specifications (Page 3 of 4)
Input Impedance: approx 5 k{l.
Maximum input Voltage: X10 V.
Z- INPUT
Sensitivity: pulse 250 ns wide and 4 V amplitude blanks
any intensity display.
input impedance: low power Schottky TTL gate.
Bandwidth: approx 10 MHz.
Maximum input Voltage: TIL level, 5 Y,
CATHODE-RAY TUBE AND CONTROLS
TYPE: post accelerator, approx 22 kV accelerating
notential, aluminized P31 phosphor.
GRATICULE: 10 x 10 div internai graticule; 0,2 sub-
division markings on major horizontal and vertical
axes; 10 X 12 cm display area.
TRACE INTENSITY: adjustable in relative steps of 1
from Y to 99.
CHARACTER INTENSITY: adjustable in relative steps |
of 1 from 0 to 99.
FIND BEAM: returns trace to CRT screen regardless of
setting of vertical, horizontal, or intensity controis.
GRATICULE ILLUMINATION: internal fiood gun.
ALIGN: aligns baseline with horizontal graticuie line,
ASTIG: controls roundness of beam.
OPERATING CHARACTERISTICS
AUTOSCOPE: seeks, scales, and displays input signals
&gt;20 mV and &gt;b0 Hz. Autoscope preselects V vs T
operating mode, main sweep, assigns Control Knob to
main sec/div, ac input coupling, character generator
on, internal trigger source, positive slope, and trigger
level to 0,5 div,
SELECTIVE AUTOSCOPE: seeks, scales, and displays
selected channels in the same manner as autoscope
except all setup functions below the variable function
keys on the &quot;VOLTAGE&quot; and &quot;TIME&quot; panels are
preserved, |
PROBE RECOGNITION: deflection factor, AV, or
external trigger level readout is automatically adjusted
for division ratio of recommended 1:1 or 10:1 probes.
SAVE/RECALL REGISTERS: saves up to eight
complete front panel setups IN nonvolatile memory.
PRESET: sets front panel to V vs T, intensified sweep
mode, 100 us/div main sweep, 10 us/div delayed
sweep, channel 1 main trigger, channel 1 delayed
trigger, 2 V/div on channels 1 and 2, and ac input
coupling.
CRT DISPLAY READOUTS: displays selected trigger
source and selected variable functions.
Trigger Source: time base, main or delayed for channels
1 and 2, external, and line.
Variable Functions: channels 1 and 2 voits/div and AV,
main and delayed sweep speeds; {ime delay, normal,
numerical, and digital, normal and numerical AT, and
calculated frequency {reciprocal of AT} 1/AT.
LED DISPLAY READOUTS: all functions related to the
Contro! Knob are displayed.
HORIZONTAL POSITION
Range: 16 major div from center vertical graticule line.
Resolution: 0.02 major divisions.
Adjustment: coarse or fine slew rates,
DUAL SEPARATION
Range: delayed sweep waveform can be adjusted +5
maior vertical div from main sweep waveform.
Resolution: 0.02 major divisions.
Adjustment: coarse or fine slew rates.
PANEL INTENSITY: adjustable in relative steps of 1 from
0 to 99.
GENERAL
BUS COMPATIBILITY: as defined in IEEE Sid 488-
1978 is: SH1, AH, Tb, TEO, L3, LEO, SR1, ALT, PPO,
DCO, DT1, CO, and EZ.
SELF CALIBRATION ROUTINES: two self calibration
routines can be performed at any time without altering
front panel setup.
Balance Self Cal: DC balances vertical pre-amplifier
inputs to minimize trace shift during defiection factor
range changes.
Delay Self Cal: calibrates delay time oscillator to within
0.005% of the internal crystal reference accuracy.
FRONT PANEL CAL 1880A/B: Channel 1 and. 2
position, dual separation, main and delayed-trigger
level, and delay time are calibrated to specified
accuracy using internally generated calibration sig-
nals. Channel 1 and 2 deflection factors, and main
and delayed sweep speeds are calibrated to speci-
fied accuracies with externally supplied calibra-
tion signals. Defiection factors and sweep speeds
are also supplied with internal calibration signals
accuracy.
SIGNAL QUTPUTS |
Calibrator Outputs: rear panel BNC and front panel
post: source impedance, approx 15061; probe calibra-
tion, 1 Y p-p &pound;1%, approx 1.86 kHz square wave, rise
time &lt;b us; programmable cal signals, 20 mV p-p&pound;2%,
100 mY p-p +1%, 200 mY p-p +1%, 1 М р-р 1%, and
10 V p-p &pound;1%.
15 Volt Reference: source impedance, approx 1 k{};
level, 1b V +30 mY.
Main Gate: source impedance, ECL gate output; signal,
high ECL logic level following main gate.
Delayed Gate: source impedance, ECL gate output;
signal, high ECL logic level following delayed gate.
POWER: 100, 120, 220, 240 Vac, +D to -10%, 48 to 440
Hz, 300 VA max with expansion module and plug-in
ROMs, standard, 200 VA max.
OPERATING ENVIRONMENT
Temperature: O to +55&quot; C,
Humidity: to 95% relative at +40&deg; C.
Altitude: to 4600 m (15 000 ft).
Vibration: vibrated in three planes for 15 min, each with
0.38 mm (0.015 in.) excursion, 10 to 55 Hz.
1-7
General Information Model 198CA/B
Table 1-1. Specifications (Page 4 of 4)
Manual, one Binder with Divider tabs, two 10081A,
10:1, divider probes approx 2 m (6 ft) long.
WEIGHT: net, approx 18.2 kg {40 Ib); shipping, approx
24.1 kg (53 ib).
ACCESSORIES FURNISHED: one blue light filter HP
P/N 01980-02701, one 2.3 m (7.5 fi} power cord, one
Expansion Module Panel Cover HP P/N 01980-24106,
two Operating/Programming Manuals, one Service
DIMENSIONS:
| mE ma LRTI TI il
|
ci ms
Pl
19804 a care re 543 (21.38) -
= 213 (8.38) — | |- — BOB {RO} me mn N
Ча 1 | ETE I
o 7 | |
il AN gro
Ji oo 278 ||| FF
&deg; (10.94),
&copy; |
N 262
(10.34
= a
&copy; A 05
—— [A ман — | Le =
= rie ac 524 {20.63} -
1980B
т — сем 502 {19.7 5)-————- —
hamac creme -521 (20.5) — N
427 (16.8) 541 (21.3)
424 (16.7)
143 (5.62)
1-8
Model 1980A/B Genera! Information
Table 1-2. Recommended Test Equipment
DEN instrument Critical Specifications Suggested Model Use*
Cable Pair 50 ohm BNC male to BNC male, approxi- HP 105024 Р
mately 9 inches long. Pair must be of
equal length.
Controlier, HP-1B HP-1B compatibility as defined by IEEE Std HP 98258 with 98034 A (revised) CT
488 and the identical ANSE Std MCT.1: -Or-
SH1, AHT, T2, TEO, L2, LEO, SRO, PPO, HP 9835A with 98332A 1/050M
DCO, DTO, and C1, 2, 3, 4, 5. and 98034A trevised)
-Or-
HP 85F
DC Source level: O to 100 Vdc Ballantine 6125B AT
accuracy: 0.25%
Digital Voltmeter range: 0 to 100 Vdc HP 3465A AT
(DVM) accuracy: 0.1% -Or-
input impedance: 10 Mohm HP 3438A
Electronic Counter range: O to 10 MHz HP 5382A AT
resolution: 8 digit
accuracy: +0.1 Hz
Function Generator range: 10 Hz to 100 kHz squarewave HP 33104 AT
2 kHz to 50 kHz sinewave
level: Oto 10 Vp-p
LCR Meter range: 3 pF to 20 pF HP 4332A A
accuracy: 15%
Oscilloscope 2 channels, delayed sweep HP 1740A APT
(sensitivity: 5 mV /div
bandwidth: 100 MHz
Peak to Peak Source level: 20 mV to 100 V Baliantine 6125B APT
accuracy: 10.25% |
Power Divider 1- 50 ohm input General Radio 874-TPDL P
2- 50 chm outputs
Probe input A: TM ohm HP 10041A APT
shunt C: 12 pF
division ratio: 10:1
comp. range: 20 to 28 pt
Probe, High Voltage division ratio: 1000:1 HP 34111A AT
{into 10 Mohm DVM input;
Sampling Voltmeter bandwidth: 10 MHz to 100 MHz HP 3406A with HP 1 1063A Р
accuracy: 13% Sampling Tee
Signal Generator range: 10 MHz to 100 MHz HP 32008 PT
Signature Analyzer No Substitute HP 5004A T
Time Mark Generator range: 5 nsec to 1 sec Ballantine 6125B APT
accuracy: 10.01%
*A = Adjustments, C = Operator's Checks, P = Performance Testing, T = Troubieshooting
1-9
General Information
Table 1-3. Recommended Test Accessories
Model 1980A/B
Accessory Type Qty Suggested Part
Adapter GR874 to female BNC 4 HP 1250-0850
Adapter GR874 to male ANC 1 HP 1250-0849
Tee BNC, coaxial, one male, two female connectors 1 HP 1250-0781
Table 1-4. Alternate Test Equipment
Instrument Suggested instrument Advantages
Type Alternate Replaced of Alternate
Controller, HP-IB
and 98034A (revised)
HP 9835A with 88332A
HP 98258 with 98213A
and 98034A (revised)
CRT Dispiay
HP Enhanced BASIC
Larger Memory
HP 85F HP 9825B with 98034A CRT Display
revised) 98213A HP Extended BASIC
Lower Cost
Digital Voltmeter (DVM) HP 3438A HP 3465A HP-1B*
* HP-IB 15 Howlett-Packard's implementation of {EEE Std 488 and the identical ANS! Std MC1.1.
Model 1980A/B installation
SECTION Il
INSTALLATION
2-1. INTRODUCTION.
This section provides installation instructions for the Measurement System. Also included is information pertinent to initial
inspection, preparation for use, storage, and shipment.
2-2. INITIAL INSPECTION.
To avoid hazardous electrical shock, do not perform electrical tests when there are
signs of shipping damage to any portion of the outer enclosure (covers and panels).
inspect the shipping container for damage. If the shipping container or cushioning material is damaged, it should be kept until
the contents of the shipment have been checked mechanically and electrically. The contents of the shipment should be as
shown in figure 1-1. Procedures for checking electrical performance are given in the Operator's Checks in Section HI and
Performance Tests in Section IV. If the contents are incomplete, if there is mechanical damage or defect, or ifthe instrument
does not pass the electrical performance test, notify the nearest Hewlett-Packard Sales and Service office. if the shipping
container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as the Hewlett-Packard
office. Keep the shipping materials for the carrier's inspection.
2-3. PREPARATION FOR USE.
2.4. Power Requirements.
The Measurement System requires a power source of 100, 120, 220, or 240 Vac +5/-10%; 48-440 Hz single phase. Power
consumption is 200 VA maximum; with an expansion module and plug-in ROMs installed, power consumption is 300 VA
maximum.
| WARNING
This is a Safety Class [| product {provided with a protective earth terminal). An
uninterruptible safety earth ground must be provided from the main power source
to the product input wiring terminals, power cord, or supplied power cord set.
Whenever it is likely that the protection has been impaired, the instrument must be
made inoperative and be secured against any unintended operation.
If this instrument is to be energized via an autotransformer for voltage reduction,
make sure the comon terminal is connected to the earthed pole of the power source.
2-1
Installation
2-5. Line Voltage and Fuse Selection.
WARNING |
For protection against fire hazard the line fuse should only be replaced with 250 Y,
fast blow fuses with the correct current rating.
dis de de an ate ak a le ak dle ale a abe ah LEIA
Di aim o's ale a Pe PT i Pe oP BP Ph a Ph a
MUA
BEFORE CONNECTING THIS INSTRUMENT to line (Mains) voltage, be sure the line
voltage switches are set correctly and that the proper fuse is installed.
If the line fuse burns out, do not replace it until the cause for failure has been
determined and repaired by a qualified service person only. Replacing this fuse in a
damaged instrument can cause additional damage.
Model 1980A/8
The line voltage switch settings and line fuse are selected at the factory according to the line (Mains) voltage available in the
country of destination. To operate the instrument from any other power source, proceed as foliows:
Disconnect power cord,
Using a blade-type screwdriver, position rear-panel LINE voltage select switches for desired Vac input. (Figure 2-1
shows switches set for 120 Vac operation.)
Select and install proper fine fuse. Fuse current ratings are printed on the LINE module on the instrument srear panel
and are listed with HP part numbers in table 2-1.
Reconnect power cord.
Table 2-1. Line Fuse Part Numbers
Line Voltage Fuse Rating HP Part Number
100/120 Vac 250 V, 3 A 2110-0003
Fast blow
ov ово 220/240 Vac 250 V, 1.5 &Agrave; 2110-0043
ZAC +5 EX
собой Мах Fast blow
MEE
FEV
Figure 2-1. Line Voltage Selection Switches
2-2
Model 1980A/B Installation
2-5. AC Power Cable.
WARNING
BEFORE CONNECTING THIS INSTRUMENT, the protective earth terminal of the
instrument must be connected to the protective conductor of the (Mains) power
cord The Mains plug must be inserted in a socket outlet provided with a protective
earth contact. The protective action must not be negated by the use of an extension
cord (power cable} without a protective conductor (grounding). Grounding one
conductor of 3 two conductor outlet does not provide an instrument ground.
This instrument is equipped with a three-wire power cable. When connected to an appropriate power receptacle this cable
grounds the instrument cabinet. The type of power cable plug shipped with each instrument depends on the country of
destination. Figure 2-2 shows the part numbers {and associated Option numbers} for the power cables and plug
configurations available. |
Option United Option Australia, Option European Option USA/
900 Kingdom 901 New Zealand 902 Continent 303 Canada
250 Y 250 V ; 250 V 125 Y
Piug: BS 1363A Plug: NZS5 198/A5 C112 Plug: CEE7-VII Plug: NEMA 5-15P
HP 8120-1703 HP 8120-0696 HP 8120-1692 HP 8120-1521
Option USA/ Option Systems Option Switzerland Option Denmark
304 Canada 305 250 V 906 312 220 V
250 V
Plug: NEMA 6-15P Piug: CEE 22-V1 Plug: SEV 1011.1959-24b07 Plug: DHCR 107
HP 8120-0598 HP 8120-2191 HP 8120-2298 HP 8120-2956
NOTE: The number listed for the plug is the industry identifier for the plug only, The HP part number specifies a complete power cordset.
Figure 2-2. Power Cable and Mains Plug Part Numbers
2-7. HP-I8 Address Selection.
The HP-IB address is displayed or changed using the keys located onthe left hand side of the CRT (refert to figure 2- 3.1 Tocheck
the address setting, set the Measurement System LINE switch to ON and press Send , then 5. me hemi RE LTE
This calisthe Hi -15 ANDRES MODE menu (refer to figure 2-3). The current instrument address is on the second line of the
display in decimal code. (Address &quot;7&quot; is preset at the factory.) Table 2-2 lists the decimal equivalents of the ASCH Talk and
Listen codes. For a more complete listing of ASC! code equivalents, refer to table 3-30.
2-3
installation Model 1980A/B
To change the HP-18 address, press:
ДАРЫ
ей МНН Or 4 ip EEE RT
When the desired address is displayed, press EN.
Note
The HP-1B address is stored in nonvolatile memory. Therefore, the address value is
not affected by power-down. It can only be changed through the front-panel! key
sequence.
419808 OSCILL SYSTEM
В TELLER
НН МОЙ Троя В
За Ta A an В АА
Figure 2-3. The Soft Keys and the +1 TE FINE AUDE Menu
2-8. Mating Connectors.
Coaxial Connectors. Coaxial mating connectors used with the Measurement System should be 50 ohm BNC male
connectors,
HP-IB Interface Connector. Interconnection data for the Hewlett-Packard Interface Bus is provided in figure 2-4.
Chassis Ground. The front-panel chassis ground jack will accept a standard banana plug. The rear-panel chassis ground
binding post accepts a standard banana plug or an 18 gauge wire.
2-9. Operating Environment
Fat it ah qu in ph he ain a
SE ale ay ADA I A в,
Do not block the instrument fan or ventilation holes. At minimum, 1/16 inch (0.2
cm) clearance should be provided around the top, bottom, and sides of the
instrument.
2-4
Model 1980A/8 installation
Table 2-2. ASCII Address Codes to Decimal Equivalents Не
ASCH Address Codes .
Decimal
LISTEN TALK Equivalents
SP @ 00
| A 01
&quot; B 02
# Сс 03
$ D 04
% E O5
&amp; F 06
| H 08
| 09
* J 10
+ K 11
L 12
- М 13
№ 14
/ O 15
О Р 16
1 Q 17
2 R 18
3 S 19
4 T 20
5 U 21
6 \ 22
7 W 23
8 X 24
9 Y 25
; Z 26
| 27
&lt; \ 28
= | 29
&gt; A 30
T Indicates factory set address.
The operating environment should be within the following limitations;
Temperature ..........eserececrecereracvreraoerrrererecravrecnvorroevvorocorerarereraar ees OT to +55%C
Mumidity ...........oeeredcoervereserecrererarererrerrererecar cy enareorooaro anne rvarerro &lt; 95% relative at 40&deg;C
Altitude otters res ee re ia &lt;4570 metres [15 000 feet)
2-10. Bench Operation.
The 1980A and 1980B cabinets have plastic feet and fold-away tilt stands for convenience in bench operation. The plastic feet
are shaped to ensure positive alignment when the Measurement System is stacked with other instruments housed in
Hewlett-Packard System 1 or System {| enclosures. The tilt stands raise the front of the instrument for easier viewing of the
front-panel.
2-5
Installation Mode! 1980A/8
, SIGNAL GROUND! SHIELD Rao CONNECT TO
P/O TWISTED PAIR WITH 11: ATN EARTH
SHOULD BE GROUNDED | P/O TWISTED PAIR WITH 10 SRQ GROUND
NEAR TERMINATION J P/O TWISTED PAIR WITH 9 {IFC
OF OTHER WIRE OF P/O TWISTED PAIR WITH 8 NDAC
TWISTED PAIR P/O TWISTED PAIR WITH 7 NRFD
P/O TWISTED PAIR WITH 6 DAV
^ ВЕМ ЕО!
DIC 8 DIO 4
DIO 7 DIO 3
DIO 6 DIO 2
DIO 5 &iexcl;DIO 1
i150 METRIC
THREAD M3.5 X 0.6
24-PiN MICRO-RIBBON
(SERIES 57) CONNECTOR
Logic Levels
The Hewlett-Packard interface Bus Logic Levels are TIL compatible, Le., the true (1) state is
0.0 Vde to +0.4 Vdc and the false (0) state is +2.5 Vdc to +5.0 Мас.
Programming and Output Data Format
Refer to Section ili, Operation.
Mating Connector
HP 1251-0293; Amphenol 57-30240.
Mating Cables Available
HP 10833A, 1 metre (3.3 ft!
HP 108338, 2 metres {8.6 ft
HP 10833C, 4 metres {13.2 Ft)
НР 108330, 0.5 metres {1.6 ft}
Cabling Restrictions
1. &Agrave; Hewlett-Packard Interface Bus system may contain no more than 2 metres (6 ft) of connecting
cable per instrument.
2. The maximum accumulative length of connecting cable for any Hewlett-Packard interface Bus
system is 20.0 metres (65.6 ft).
Figure 2-4. Hewlett-Packard Interface Bus Connection
2-6
Model 19804/B | | Installation
2-11. Rack Mounting.
Rack mounting information is provided with the rack mounting kits. If a kit was not ordered with the instrument as an option, it
can be ordered through the nearest Hewlett-Packard Sales office. Refer to paragraph 1-8, Mechanical Options for the
appropriate part numbers. |
2-12. STORAGE AND SHIPMENT.
2-13, Environment.
The Measurement System may be stored or shipped in environments within the following limits:
Temperature .........._eeeeeceerrorrrerecoroecaorocarcarior o rr eD. eaenedereoroanecaorrereeeen. -55&deg;С 10 +75&deg;С
Humidity oti titi tt i eet rte eee ee aaa eae ES &lt; 95% relative
Altitude oot eee KR nee ee i &lt; 15 300 metres (50 000 feet)
Protect the instrument from conditions which would cause internal condensation.
2-14. Packaging.
Original Packaging. Containers and materials identical to those used in factory packaging are available through Hewlett-
Packard offices. if the instrument is being returned to Hewlett-Packard for servicing, attach a tag indicating the type of service
required, return address, model number, and full serial number. Also mark the container FRAGILE to ensure careful handling.
In correspondence, refer to the instrument by model number and full serial number.
Other Packaging. The following general instructions should be used for repackaging with commercially available materials:
a. Wrap instrument in heavy paper or plastic. {if shipping to Hewlett-Packard office or service center, attach tag
indicating type of service required, return address, model number, and full serial number |
b. Use strong shipping container. &Agrave; double-wall carton made of 2.4 MPa (350 psi) test material is adequate.
с. Use a layer of shock-absorbing material 75 to 100 mm (3- to 4-inch) thick around all sides of the instrument to provide
firm cushioning and prevent movement inside container. Protect control panel with cardboard.
d. Seal shipping container securely.
e. Mark shipping container FRAGILE to ensure careful handling.
f. In any correspondence, refer to instrument by model number and full serial number.
2-7/12-8 blank)
Model 19308 | Operation
SECTION IH
OPERATION
3-1. INTRODUCTION.
This section contains complete operating information for the 1980A /B Oscilloscope Measurement System. Included in this
section are descriptions of ail front and rear panel features, local and remote operation, operators checks, adjustments, and
maintenance. Also included is a ‘Getting Acquainted” exercise which is designed to familiarize the first time user with front
panel operation and features.
3-2. Operating Characteristics.
The 1980A /B Oscilloscope Measurement System is a two channel, 100 MHz oscilloscope which can be controlled via HP-1B.
Complete instrument setups can be programmed and measurement results can be reported under remote control. Eight
nonvolatile internal registers can be used for saving and recalling complete instrument setups during focal or remote
operation. Measurement System capabilities can be extended by adding various internal options and plug-in Expansion
Modules. |
Table 3-1 summarizes the major operating characteristics of the 1980A/B Oscilloscope Measurement System. For a
complete description, refer to Table 1-1, Specifications. HP-1B capabilities are summarized in Table 3-3, Message Reference
Table,
3-3. Local Operation,
Instructions for local ti.e., front panel) operation are described in the following paragraphs. To learn the basic operation of the
instrument, begin with Simplified Operation and the Getting Acquainted exercise. Once familiar with the general operation,
use the Detailed Operating Instructions for complete and in-depth information about operating the Measurement System.
Simplified Operation (page 3-4) is an overview of front panel operation, it provides an introduction to basic operating
procedures and front panel controls. An index to the Detailed Operating Instructions is opposite Simplified Operationto guide
the operator to further information.
Getting Acquainted {page 3-6} is an exercise for hands-on operation using the major instrument functions. Instrument
operating procedures and some basic measurement techniques are explained. The exercise takes about 20 minutes to
perform, The only equipment required is a 1980A/B and a probe,
Panel Features (page 3-13) briefly describes ail controls, connectors and indicators. Front panel features are discussed in
figures 3-b to 3-9. Rear panel features are in figure 3-10.
Detailed Operating Instructions (page 3-40) provide a complete operating reference for the Measurement System user,
They include information about the various measurements that can be made, as well as complete descriptions of all controls
and menu functions. The instructions are arranged alphabetically by subject. They are indexed by function in table 3-2.
3-1
Operation | Model 19808
Each instruction contains a general description that covers signal levels, ranges, measurement limits, and other general
information. Following the description, focal operating procedures are explained and an example is given to illustrate the
procedures, At the end of each instruction, any special considerations are listed that might aid the user. Also included are
references to other instructions which contain related information.
3-4. Remote Operation.
Knowledge of local operation is essential for the remote operator to use the full capabilities of the Measurement System.
Pages containing explanations of HP-IB related operations are noted with the JEEHEl symbol. Instructions for HP-1B
operation are in the following paragraphs:
Remote Operation, Hewlett-Packard Interface Bus (page 3-18! presents a complete description of the instrument 's bus
implementation. it covers bus compatibility, HP-IB message response, general Data message {input and output} format rules,
and many other basic bus considerations.
Detailed Operating Instructions (page 3-40} explain how to program instrument functions and make bus controlied
measurements. Specific format rules and any special programming considerations are described. Each instruction includes a
programming example for reference. Table 3-2 indexes the Detailed Operating Instructions by function.
HP-1B Codes and Format Summary (page 3-131} condenses the programming information for the instrument, it is a quick
reference for the experienced remote operator, The summary lists ali program codes by function and includes a complete
description of parameter range and format,
Notation Conventions and Definitions (page 3-137} explains the syntax conventions used in the manual.
3-5. Operator's Checks.
This section includes procedures that allow the operator to make a quick evaluation of instrument operation. The following
checks are provided:
Confidence Test (page 3-32! is a menu function that assures most of the instrument is operating properly. This procedure
only requires a probe or BNC cable.
Memory Check (page 3-33) is a menu function that verifies the content and operation of ROM and RAM memory. No
additional equipment is required.
HP-IB 1/0 Check (page 3-33) confirms that the Measurement System responds properly to ali HP-IB messages. This check
assumes that local operation has been verified with the Confidence Test and Memory Check procedures. An HP-IB controller,
interface and connecting cable are required.
3-6. Operator's Calibration and Adjustment.
This section provides several procedures that should be used periodically to ensure measurement accuracy. Each procedure
includes a brief description of the adjustment andthe recommended calibration cycle. The following procedures are provided:
Delay Time Self-cal (page 3-38) is a menu function that automatically nulls drift in the delay circuits. The Delay Self-cal
routine should be executed before all critical measurements where the highest resolution and accuracy are required.
3-2
Model 19808 | | Operation
Vertical Balance Self-cal (page 3-39) is a menu function that nulls the offsets within the vertical amplifiers. Execute this
routine if trace baselines shift as vertical deflection factor is changed.
CRY Display Adjustment (page 3-40) explains how to set trace alignment, focus, and astigmatism.
Probe Compensation (page 3-40) describes how to adjust the low frequency compensation of probes used with the
Measurement System.
3-7. OPERATOR'S MAINTENANCE.
The only instrument maintenance an operator needs to perform is to occasionally clean the CRT contrast filter and the
instrument front panels using a soft coth and either a commercial glass cleaner, or a mild scap and water solution.
| WARNING |
Do not remove covers. Internal parts present an electrical shock hazard. Refer
servicing to qualified service personnel
O
O
&gt;
=
=
O
&amp;
Do nat use chemical cleaning agents or abrasive cleaners that might damage the
plastics in this instrument. Recommended cleaning agents are isopropy/ alcohol,
kelite {1 part kelite, 20 parts water), or a solution of 1% mild detergent and 89%
water.
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Model 19808
SIMPLIFIED OPERATION
Obtaining a Basic Display
Use autoscope to quickly set up the 1980A /Bfor a basic, triggered display. Connect the signal to be viewed to channel 1
or 2, and press (НОСОК,
indications
Active functions or operating modes are indicated by the lighted keys and the CRT readout.
Primary variable function values are displayed in the CRT readout for convenient reference.
Advisory messages are displayed on the CRT as an operator's aid. They are displayed momentarily when an illegal key
entry is made or when other conditions occur that may require additional information.
Changing Values
Variable function values can be changed with the Control Knob.
Assign the Control Knob to a variable function by pressing the corresponding variable function key:
MUR
ML US
trace intensity
panel intensity
character intensity
deflection factor
vertical position
sweep speed
trigger level
horizontal position
dual separation
delay
FR
delay, numerical entry mode
Then increment or decrement the function value by rotating the Control Knob.
The Control Knob is a stepping control. Coarse or fine step resolution can be selected with Red.
Soft Key Menus
The function of the soft keys is changed when a menu is called to the CRT. Menus redefine the soft keys with displayed
labels such as:
soft key number soft key function
The menus can be turned on and off by pressing 95521 |
Model 1980A/B
Table 3-2. Detailed Operating Instructions Index
Operation
Horizoniel Mode : |
Horizontal Position. д
Sweep Speed. Main =
Autoscope E
Sweep | Mode, Delayed: ; ns ME 330
8 rigger, Del ed
Page: “Instruction CE BC
P&Eacute;TER Ho otizo nal Mode . RI PB
| ; i &copy; Ini я ia i ze o = и A = о . ; - ; Ы ; | | 5 x ; : - ; : | ; ; | ; ; : - ,
52 Scope Mode. a РОВ:
ая о - cal Mode oe : Ge : ; : ; : 5 ; ; | ; : i | tE - у : 1
Special Functions
(Trigger, Delayed Sweep - ит e
&laquo;Trigger, Main Sweep. DENN ANA
&copy; Trigger Flag... a E os
Tes “Trigger Vi EW a 3 UE в 8 8 NE 5 я POS
| &gt; Vertical Coupling a Lh a UN Л
“Variable Functions
ntensity, Trace:
: Vertical | Ce ННЦ
Ban dwi i dth Li m it. o E RRE ; SNH
e “Cor nt rol Kno be RR E e EA o e
5 ol Autoscope ..- —_ 2 = SRE ARR ERLE
TN: Calibrator Level. a a ed 1003
Character: Generator‘. A Eee у 8
o Control. Knob NA DI EA A
&copy; is -. Delta Time... о e er \ O 3
Delta Volts. E us E EP CONEA i Ee
un с n iti ia I Ze... . &copy; &copy; ; SET Be
DNS ES ect Recall. Дл NAAA
a sa : i son Key Menus E - SI : № LS ВЕ
; 3: 5 2 70 &copy; : - - ; De - Trigge ег. Flag - E Е 1 = : &gt; : к - ; - : : Wr : = - : ; - ; | : - В 3.
a e но с &gt; as Trigger Functions | DA = _ РУНЕТ
| a uE wep Mode, Delayed . EE iD FEE 3 9!
с e Toss 9 1 pei | 2 - Sweep Mo de; Main' Se 5 mn e = ; В = ; 3 . ВЕ
3 a
3117
3120
ILL mn 3 122 A
= a Deflection sr. Sek ЦЕ ; is A 3-125:
So Control | Knob . E o NN N 3
) о Delay -..... o &copy; &copy; fr arriere rate ES
) Delta Time: ds | ОЙ AAA A ai 03
7 Detta Volts осо. es TE Lee CE
Horizontal | Position” EE EE В 5 a 5 &copy; 3
0 ntensity, Characters and d Lamps - A ia Be
on Reading’ Values Via He. зв. ia | sr E
“212; Separation, Dual... cite + n A о с SS
i Sweep Sp eed, Del ayed. TEA | о Cr EBA
&copy; Sweep Speed, Main ....... ео,
ЗЫ Trigger. Delaye d Sweep. Sa : . EA ; 31
&quot;Ооо Trigger, Main Sweep a ses 34
2 Vertical: Deflection Factor. RE pe es В 31
UE Vertical Position . E TS 1
Func ск on 5 = : : de DS ve :
“3. 345
IE 1.0. 8-54.
yo Vertical | Coupli ing. Hi e AAA Be
Vertical | Deflection Factor LB
CNN Vertical Mode... я + ie Dni 8
E: x uu Vertical Position . Mea. E me + Les и Ne - - - - -
3-5
Operation Mode! 1980A/8B
GETTING ACQUAINTED EXERCISE
3-10. GETTING ACQUAINTED EXERCISE.
This exercise is designed to acquaint you with front-panel operation of the Measurement System. It provides a
demonstration of general operating features and many of the special functions. In addition, some basic measurement
techniques are described. The exercise should take about 20 minutes to perform. The only equipment required is a 1980A/B
and a probe.
MILENA AN
&quot;UEFA EA Ea E
CAUTION
ETE
TEE
Before turning the instrument on the first time, follow these instructions.
On the rear panel:
1. Check line voltage switches for correct voltage selection.
2. Check fuse for correct current rating. Current ratings are printed on the
line module.
3. Connect power cable.
Set the front-panel LINE switch to ON.
Set up the 1980A/B by connecting the calibrator signal to the channel 2 input (figure 3-2).
3 ec =
= ue
E e
= re Te
ee Te
3
TA
Ea
AEREA
80-348
Figure 3-2. Getting Acquainted Exercise Setup
3-6
Mode! 1980A/B Operation
GETTING ACQUAINTED EXERCISE
INITIALIZE
Set LINE switch to OFF, then to ON,
3-11. Using Autoscope.
Autoscope is a convenient means of obtaining a basic display of an unknown signal. In executing autoscope, the 1980A/B
scans the vertical inputs, selects trigger sources, and autoranges trigger levels, deflection factors and sweep speeds,
Execute autoscope, press : Avro-Score
After autoscope, the 1980A/B displays input signals plotted vs main sweep. Main sweep speed is selected to display ~ 2
cycles of the waveform. if only one signal is applied, deflection factor is selected so the displayed signal is ~ 3 divisions peak to
peak.
For more information about the autoscope function, refer to the “Autoscope” Detailed Operating Instruction.
3-12. Keys and Indications.
Instead of conventional mechanical switches, the 1980A/B has membrane switch keys to control instrument operation.
Instrument setup is stored in nonvolatile memory, so itis not lost when instrument power is cycled off and on. The keys are
easy to operate, just press on the center of the key legend.
Active functions or operating modes are indicated by lighted keys. For example, press ad to turn on vertical bandwidth
Tenet Зо
limit. The key lights to indicate bandwidth limit is on.
iis used to select blue-labled shift functions. i shifts only the next key that is pressed. if the next key has no blue shift function,
the normal function is performed. For example, to invert channel 2, first press |. It lights to indicate that ablue function canbe
selected. Now press | 2. to select inverted display. Invert is a toggling function, so press! Ao restore noninverted
demo
et
display. Press 1 Because im has no blue function, the shift is ignored.
Advisory messages provide supplemental operating information. They are displayed momentarily on the CRT when invalid
operations are attempted or when certain special conditions are in effect. For an example, press &laquo;= &copy;. The advisory
EY A SARL ET ls displayed to indicate the key has no function in the current operating mode. &Agrave; description of all advisory
messages {and suggested response) is contained in the “Advisory Messages” Detailed Operating instruction.
Primary variable function parameters are displayed in the CRT readout. Figure 3-3 describes the readout display when
channel 1 and 2, and both main and delayed timebases are on.
3-13. Changing Values.
Parameter values of variable functions are changed with the Control Knob. The Control Knob is a digital control with an
“analog feel”. Values set by the knob are stored in nonvolatile memory, so they are not lost when instrument power is cycled
off and on.
3-7
Operation Model 19804/B
GETTING ACQUAINTED EXERCISE
= Channel 2 deflection
factor value
Channel 1 deflection
factor value
Delayed trigger
source Delay vaiue
{control knob is assigned to delay}
Main trigger source
AS E о ОООНН НН Delayed sweep
Main sweep- SA0R OSCILLOSCOPE MEASUREMENT SYSTEM speed value
speed value 5.
Figure 3-3. The CRT Readout 80-344
Executing autoscope assigns the Control Knob to main sweep speed. To indicate this selection, f= (mainjis lighted and the
LED readout displays the main sweep speed value. Also, the CRT readout displays Mil in inverse video to indicate that the
Control Knob is assigned to main sweep speed.
Change the main sweep speed by rotating the Control Knob, Press | to toggle between fine and coarse step resolution.
When coarse is selected, sweep speed changes in relatively large steps. In contrast, fine provides a vernier-like adjustment
that is continuously in calibration.
Now, change the deflection factor value for channel 2. Press { ch 2) to assign the Control Knob. Notice the change in
the CRT and LED readouts. Change the deflection factor by rotating the Control Knob. Again, try making both fine and coarse
adjustments,
—
. To exit
Accidental changes to values can be prevented by putting the Control Knob in hold mode. To select hold, press | |
hold mode, press any enabled variable function key.
For more information about using the Control Knob, refer to the “Control Knob” Detailed Operating Instruction.
INITIALIZE
OPTION:
Press: “eau:
3-14. Using the Trigger Controls.
With the 19804/B, stable triggering is easy to establish using this general procedure:
Check that both the main and delayed sweeps are in auto sweep mode. “and “EX should both be lighted.
Select the signal source for the main sweep trigger. Since the calibrator signal is connected to channel! 2, press &amp; iC
‚When 5 is pressed, the advisory СТО CHEMEE THT SFC CSEL CHRM is displayed. This is justa reminder to
CELINE
3-8
Model 1980A/B | Operation
GETTING ACQUAINTED EXERCISE
E - to specify the source. Otherwise, the last internal trigger source ts restored. The CRT
readout displays the selected trigger source.
press either E or +
Press
(main) and adjust main trigger level with the Control Knob for a triggered display. As an adjustment aid, the
trigger signal is displayed while the Control Knob is turned. The center horizontal graticule line represents the trigger
threshold level with respect to the trigger signal.
When adjusting trigger controls, begin with the timebases in auto-sweep mode so there is a trace displayed. For example,
press ime {dly'd} to put delayed sweep in triggered mode. Because channel 1 is selected as the delayed trigger source andthe
trigger level is misadjusted, delayed sweep is not triggered. This inhibits main sweep and trigger view making it more difficult
to correct the triggering problem. Notice that the delayed sweep NOT indicator is lighted. The NOT indicators show which
sweep is not triggered. Press ihe to return delayed to auto-sweep mode.
Now select the trigger source and level for delayed sweep. Press &lt;= : 5 - Hd (diy'd) and rotate the Control Knob until
trigger signal overiaps the center horizontal graticule line.
In some cases, it is desireable to display the trigger signal continuously. Press | MAN to display main trigger view.
rias ar
negative siope.
For more information about triggering, refer to the &quot;Trigger, Delayed Sweep”, &quot;Trigger, Main Sweep” and &quot;Trigger View”
Detailed Operating Instructions.
INITIALIZE |
Pr €ss. “nel ENTE.
3-15. Using Delayed Sweep.
This procedure describes some basic features of delayed sweep operation. Press NE to display delayed sweep as a marker
on the main sweep.
When the delayed sweep is in auto mode, marker position is determined solely by the delay time value. Press
change delay time with the Control Knob until the marker overlaps the falling edge of the first pulse.
Press pun to display the delayed sweep. This provides an expanded view of the pulse edge.
Select dual horizontal mode, press *““. Dual displays both the main and delayed sweep traces. The main sweep marker
indicates the portion of the waveform displayed in delayed sweep. Press
upper half of the CRT using the Control Knob. Press | E
sweeps for convenient viewing.
(ch 2) and center the main sweep trace inthe
and use the Control Knob to change the separation between
Press Es
(diy'd} and change the delayed sweep speed with the Control Knob. Try using both coarse and fine. Because the
swaep rates of the two timebases are independent of each other, delayed sweep can actually be slower than main sweep.
3-9
Operation Model 1 9804/B
GETTING ACQUAINTED EXERCISE
and rotate the Control Knob until the marker goes off
screen. The advisory [HRTEM TI TRACE OFF CREE Is displayed as a reminder that delay time value is longer than main
Delayed sweep can start after main sweep is completed. Press
sweep.
To zero the delay value, press ! oc
For more information about delayed sweep, refer to the &quot;Sweep Mode, Delayed” and &quot;Sweep Speed, Delayed” Detailed
Operating Instructions.
INITIALIZE
Als
. &Eacute;&Eacute;UTO-SCOPE.
Press: ter ET
3-16. Using Delta Volts.
Voltage measurements are simplified with the AV function. Try this procedure for peak to peak measurements;
Position channel 2 so the bottom peak of the waveform is on the center horizontal graticuie line. Pres {ch 2)
and position with the Control Knob.
to turn on and zero the AV function.
Now make the voltage measurement. Change channel 2 position with the Control Knob until the top peak is on the
center horizontal graticule line,
Read the peak to peak voltage (expressed as AV} in either the LED or CRT readout.
For more information about voltage measurements, refer to the “Delta Volts” Detailed Operating Instruction.
INITIALIZE
Press: LauTd - SCOPE
BELEGTIVE
3-17. Using Delta Time.
Timing or frequency measurements can be made quickly with the 1980A/B by using the AT function. Try this basic
procedure for measuring pulse risetime:
(ch 2}
Change channel 2 deflection factor so that the input signal is displayed as 5 divisions peak to peak, press
and adjust with Control Knob.
Change channel 2 vertical position, if necessary, to center waveform. Waveform peaks should just reach the O and
100% points marked on the right hand side of the CRT . Press (ch 2} and center with Control Knob.
Press 95 to display delayed sweep as a marker on waveform.
Change delay time until marker starts at the beginning of the rising edge of the second pulse. Press
marker with the Control Knob.
3-10
Model 1980A/B Operation
GETTING ACQUAINTED EXERCISE
Decrease marker width by increasing delayed sweep speed until marker just overlaps the pulserising edge. Press
(dly'd} and adjust with the Control Knob,
PRD
Display the delayed sweep trace only, press 2:07, .
Change delay time until pulse edge intersects the center vertical graticule line at the 10% point. Press
change with the Control Knob.
to turn on and zero the AT function.
Press!
Increase delay time with the Control Knob until the puise edge intersects the center vertical graticule line at the 80%
point,
Read the pulse risetime {expressed as AT} in either the LED or CRT readout.
For more information about timing measurements, refer to the “Delta Time” Detailed Operating Instruction.
INITIALIZE
Set LINE switch to OFF, then to ON.
3-18. Using Soft Key Menus.
Soft key menus add many special measurement and utility functions to the instrument. Menus redefine the soft keys with
labels displayed on the CRT. To call the first {evel menu, press Zu Figure 3-4 contains an explanation of the soft key
LEE 12 1
functions defined by ОРТТОН МЕН,
&quot;E TILE TIES menu
4500 calls INSTALLED OPTION LIST menu
SENO calls HF -TE ADDRESS TODE menu
turns off THT IO FEM
CEE ADE CSC LOSCOPRPE ME ASLINEMENT SYSTEM
+ ET
BEER
Figure 3-4. The TIT MERLE Soft Key Definitions 80-345
Press 3:46. COMPITERCE TEST 1SEMF-E This calls CONFIDENCE TEST menu which contains instructions for the test.
GO
Press 5% to test channel 2.
Operation Model 1980A/B
GETTING ACQUAINTED EXERCISE
Confidence Test executes a series of autoscopes while changing the calibrator output level, It checks the vertical attenuators,
and the vertical, horizontal, and trigger circuits, At the end of the test, an advisory is displayed to indicate whether the
instrument passed or failed.
Now, call the LTILITIES menu by pressing
bee
Utility functions are primarily used for testing and servicing the instrument.
All menus (except EFTICciN Miki) provide backstep capability to allow returning to the previous menu. Return to
the DRL TEERTE &pound;&amp; UTILITIES menu by pressing 3
To return the soft keys to their normal functions, press SE.
For more information about menu functions, refer to the &quot;Soft Key Menus” Detailed Operating Instruction.
INITIALIZE
Set LINE switch to OFF, then to ON,
3-19. Using Save/Recail.
When a test sequence is used repetitively, instrument states can be stored in the Save/Recall registers for recall duringthe
procedure. Up to eight instrument states can be stored. Theregisters are selected using the soft keys after the
SPESEN IH #7 SE 1 menu is called,
— Store the current instrument state in register S1, press во ЗЕ
: OPTION
Change the instrument state, press ZZ.
Store this state in S2, press e:
Recall $1, press 71104
Recall S2, press 7
Refer to the “Save/Reca!l!” Detailed Operating Instruction for more information.
Model 1980A/B
3-20. PANEL FEATURES.
Soft Keys
OPTION:
OPTION
CRT. When a menu is displayed, pressing |
TT
assigns the Control Knob to trace intensity.
assigns the Control Knob to panel intensity.
assigns the Control Knob to character generator intensity.
= toggles character generator on and off.
has no function except as defined by menus.
has no function except as defined by menus.
instrument state in the corresponding Save/Recall register. ro
A ETS HS, I menu.
AE. ELO Lis Ti) menu,
has no function except as defined by menus.
Figure 3-5. Display Panel Features
80-82
Channel 1 and 2 deflection factor is displayed if the channel is on or is selected as a trigger
source. AV mode is selected, A value is displayed instead of deflection factor.
90%
‚100%
For 10 div meas- | Pod
urements, 90%
and 10% reference +
points are marked
on the graticule. 20%
—— 10%
: man 0%
10%-
TN 10500 OSCMNLOSCOPE ME ASUNEMENT SYSTEM
PE IE WLETT + PAC HARD
EE ie
Main and delayed sweep speed, trigger source, and delay values are displayed if the
timebase is on. If AT mode is selected, AT value is displayed instead of the delay value.
Figure 3-6. CRT Features
90%,
10%
Operation
Suena calls CFT 100 MERLE which redefines the soft key functions with labels displayed on the
mE! returns the soft keys to their normal functions.
ES AT SC menu. The soft keys are then defined to store
turns off the
For 5 div measure-
ments, 100%,
80%, 20%,
and 0%
reference points
are marked on the
graticule.
80-344
Operation
Beam Finder
FINDS:
Model 1980A/B
Autoscope
rene executes autoscope.
| AUTOCSCOPE. executes selective autoscope, Instrument autoranges deflection factor and sweep
speed but preserves channel selection, coupling and trigger setups.
Delta Time and Delta Volts
I). If Control Knob is
assigned to vertical position
channel. if the Control Knob is assigned toa A function, pressing turns off that mode and
restores normal delay time or vertical position control.
Control Knob
ri
is used to change variable function parameter values. It is assigned to a function
by pressing the corresponding variable function key. The function value is displayed in the
LED readout.
oggles the Control Knob step resolution between fine and coarse.
| puts the Control Knob in hold.
&laquo;ae: Changes the gain of the vertical and horizontal output amplifiers so that when the beam is off screen, it can be
located.
Service Request
“a. is Used in remote operation to request service from the HP-IB controller.
Return to Local
| E switches the 1980A/B from remote to local mode unless loca! lockout &iacute;s in effect.
CRT Adjustments
FOCUS adjusts spot size for sharp display.
GRAT INTEN illuminates the CRT graticule for photographing.
ASTIG adjusts spot shape for sharp display.
ALIGN adjusts the horizontal alignment of the sweeps with the CRT graticule,
Figure 3-7. Control Panel Features
Model 1980A/B Operation
Scope Mode
05% selects normal oscilloscope mode, input signals (Y-axis) plotted vs timebase
signals (X-axis).
Cle e SE | 5 = selects X-Y mode, channel 1 signal (Y-axis) plotted vs channel 2 signal
|
X-axis). Timebases are disabled.
| E selects display mode using rear-panel X, Y, and Z-blanking inputs. Disables
channels 1 and 2, and timebases.
- EU CHEER E Blu e K ey
В ; shifts blue labeled keys to their alternate function, applies only tothe next key
that is pressed. If the next key has no blue labeled function, the shift is ignored.
re Vertical Mode
Es 1 and Sg togg le corres pon din g € hannels on and off.
QE turns on channel t and 2, displays algebraic sum. Can be used for differen-
tial measurements when one channel is inverted with respect to the other.
2% selects alternate or chop mode automatically.
7 provide manual selection of alternate or chop mode.
Vertical Deflection Factor
&agrave; ich 1 or 2) asigns Control Knob to vertical deflection factor.
“5 inverts channel 1.
+. inverts channel 2.
Vertical Position
{ch 1 or 2} assigns Control Knob to vertical position.
Vertical Coupling
EL hates ims, and KAREL (ch 1 or 2) select the input signal coupling.
Bandwidth Limit
es toggles bandwidth limit on or off. Can be used in V vs Tor 1 vs 2 modes to limit vertical response,
Channel Inputs
Channel 1 and 2 inputs are female BNC connectors which have the special probe key contact. When the recommended
HP probes are connected, channel deflection factor is displayed as the total value at the probe tip.
Figure 3-8. Voltage Panel Features
Operation Model 1980A/B
Horizontal Mode
eww enables and displays main timebase only.
ANT enables main and delayed timebases. Displays delayed sweep as a marker on main
sweep trace.
Mm enables main and delayed timebases. Displays delayed sweep only.
&iexcl;pu enables main and delayed timebases. Displays main and delayed sweeps in
alternate or chop, depending on vertical display mode selection
Trigger View
| ames toggles the main trigger view on or off.
mais toggles delayed trigger view on or off.
Horizontal Position
assigns Control Knob to horizontal position.
Dual Separation
80-80
assigns Control Knob to dual separation.
Sweep Mode
Ок i rigs
SE UT and soul select the mode of main sweep operation.
&iexcl;AUTO Me aa TRIGO&quot; iD ext:
sue, emo, ANO dy: select the mode of delayed sweep operation.
&quot;EE. resets both main and delayed sweeps.
Sweep Speed
L (main or dly'd) assigns the Control Knob to sweep speed.
Delay
x assigns the Control Knob to delay, normal entry mode. if delayed sweep is in auto-sweep or triggered sweep
modes, delay value is in units of time. In digital delay mode, delay is expressed as trigger events.
| assigns the Control Knob to numerical time entry mode if delayed sweep is in auto-sweep or triggered sweep
modes.
Trigger
——
main &laquo; or r diyd) assigns the Control Knob to trigger level.
o a . м
а ia
E
Te “and | wii gelect internal trigger source for main and delayed. Specify desired vertical channel by pressing &lt; “on
eg
ori &quot;
wi = {main or diy'd} selects external= 10 trigger source.
e == imain or diy dj selects external —1 trigger source.
| so selects line trigger source for main sweep,
FX (main or diy’d} toggles trigger slope between positive and negative edge.
LH {main or dly'd} selects low pass filter on trigger signal.
| ira (main or diy'dj selects high pass filter on trigger signal. Cannot be used in DC coupling.
us , De and | iin (main or dy d) select the coupling for external trigger inputs.
External Trigger Inputs
Main and delayed inputs are female BNC connectors which have the special probe key contact. When the recommended
HP probes are connected, external trigger level is displayed as the total value at the probe tip.
Figure 3-9. Time Panel Features
Model 1 980A/B Operation
MAIN GATE OUTPUT: Provides ECL
level thigh= -0.8 Y, low= -1.8 Vi
signal that is high during main sweep.
DLY'D GATE QUTPUT: Provides ECL
HP-IB: Connects the 1980A/B to the level (high= —08 V, lows ~18 V}
Hewlett-Packard interface Bus for signal that is high during delayed
remote operation. sweep.
CHASSIS GROUND: Binding post CAL SWITCH: Front-panel calibration
accepts either a banana plug or 18 is inhibited when the CAL switch is in
guage wire, | the protected position.
VOLTAGE SELECTION: Switches
must be set to voltage of applied power
source, Refer to paragraph 2-5, Line
Voltage and Fuse Selection for
instructions about setting the line X AXIS INPUT: X-axis input from HP
switches. | | Model 1607A.
FUSE: Select fuse according to Z BLANKING INPUT: Z-axis blanking
applied line voltage. Fuse part signal from HP Model 1607A.
numbers are listed in table 2-1 of this |
manual. The 1980A/B is completely
disabled if this fuse burns out. The line
fuse should not be replaced until the
cause of its failure has been
determined,
LINE: Receptacle provides a direct Y AXIS INPUT: Y-axis input from HP
grounding connection to the 1980A/8 Model 16C7A.
chassis through the center contact.
Avaliable power cordsets are
described in paragraph 2-6, AC Power
Cable.
+15 V REF OUTPUT: Voltage CAL OUTPUT: Frequency reference
reference for 1880A/B calibration. for 1980A/B calibration and
Source impedance is —1k N; output calibration checks. Same as front-
level is 15 VE 30 mV pane! calibrator signal.
80-353
Figure 3-10. Rear-panel Features
Operation Model 1980A/B
3-21. REMOTE OPERATION, HEWLETT-PACKARD INTERFACE BUS.
The 1980A/8 Oscilloscope Measurement System can be operated through the Hewlett-Packard Interface Bus {HP-1B). Menu
Sama:
functions, remote only functions, and all front panel functions (except those of “ke. , LINE switch, and the CRT display
adiustments) are programmable through the HP-IB. Bus compatibility, programming, and data format are described in the
following paragraphs.
The notation used in this section to described bus communications is defined in paragraph 3-56, Notation Conventions and
Definitions.
In this manual, the 1980A/B program codes are listed in ASClicode. Table 3-30, Commonly Used Code Conversions, includes
a listing of ASClH characters and some commonly used equivalent codes.
A quick check of the instrument HP-1B functions is provided in the HP-IB 1/0 Check (paragraph 3-47). K verifies that the
instrument can respond to or send each of the applicable HP-IB messages described in table 3-3.
For more information about HP-IB, refer to IEEE Std 488 (or the identical ANSI Standard MC1.1}, &quot;IEEE Standard Digital
Interface for Programmable Instrumentation’. The Hewlett-Packard catalog and the bookiet ’Improving Measurements in
Engineering and Manufacturing” [HP part number 5952-0058) provide an overview of bus operation and useful information
about HP-IB system appiications.
3-22. HP-IB Compatibilty.
The Measurement System's complete bus compatibility as defined in IEEE Std 488 is presented in table 3-3.
The programming capability of the instrument is further described by the twelve HP-1B meta messages in the left hand column
of table 3-3. Foremost among these is the Data message. Data messages contain the program codes that set the instruments
mode of operation.
Table 3-3. HP-IB Message Reference Table (1 of 2)
HP-IB Applicable Instrument Response Related interface
Meta Commands Functions
Message and
Control
Lines
Data Yes All front panel, menu, and remote functions are bus pro- | DAB MLA | L3
grammabie except LINE switch, 1 and CRT adjustments. | EOI UNL | TH
Also, ail instrument settings may be read v&iacute;a the HP-1B. EOS MTA
UNT
OTA
Trigger Yes Does not have device trigger capability, however, GET is | GET UTA
decoded and available for use by internal or plug-in options. | MLA
Clear No Does not respond to the Clear message. DCL DCO
SBC
Model 1980A/B Operation
Table 3-3. HP-1B Message Reference Table (2 of 2) ae
HP-18B Applicabie Instrument Response Related interface
Meta Commands Functions
Message and
Control
Lines
Remote Yes Enabled to remote mode when the REN bus control line is | REN ALT
true. However, it remains in local until it is addressed to | MLA
listen the first time. Control Knob is put In hold on local to
remote transition,
Local Yes Returns from remote to loca! when it receives the Local i GTL ALA
message or the key seguence |, en”: 15 pressed. Settings | MLA
remain unchanged after the remote-to-local transition.
Local Yes When in remote, and local lockout is in effect, the front | LLO 51.1
panel is disabled. Only the system controller can return the
instrument to local.
Clear Yes Returns to focal and local lockout is cleared when the | REN RL
Lockout/ REN bus controi line goes false.
Set Local
Pass/Take | No The controller subset is not implemented. TCT CO
Control
Require Yes Sets the SRO line true when one of the service request {| SRO SRI
Service conditions occur, if it has been enabled to send the RQS
message for that condition.
Status Yes Responds to a Serial Poll Enable (SPE) bus command by | SPE 5
Byte sending an eight-bit byte when it is addressed 10 talk. Bit 7 | SPD
ROS biti is true ifthe 1980A/B had set the SRQ bus control | STB
line true. The byte is cleared after it is read by the HP-IB
controller.
Status No Does not respond to a parallel poll. PPE PPC | PPO
Bit PPD PPU
Abort Yes ls unaddressed to listen or talk. FC Th
L3
1. Commands, Control lines and interface Functions are defined in {EEE Std 488-1978. Knowledge of these
might not be necessary if your controller's manual described programming in terms of the twelve HP-IB Meta
Messages shown in the left column,
2. The 1980A/B Oscilloscope Measurement System's complete bus capability as defined in IEEE Std 488-1978 is.
SHIT, AHI, T5, TEO, L3, LEO, SR1, RLT, PPO, DCO, DT1, CO, EZ
3-23. HP-1B Status Display.
The status of the Measurement System on the HP-IB is annunciated on the CRT by a special HP-1B status advisory. For
example, figure 3-8 shows the HP-18 status advisory dispiayed when the instrument is in remote mode and addressed to
listen, The symbois displayed In the advisory and their indications are listed in table 3-4.
3-19
Operation Mode! 1980A/8
Table 3-4. Symbols Used in HP-IB Status Advisory
Advisory HP-iB Status Indication
Symbol
bet Switched to remote mode
|. Addressed to listen
Addressed to talk
issued the Require Service message
The HP-1B status advisory is normally enabled. {It is enabled by default at power-on andwhen the idm HE TE menu is
accessed.) The status advisory can be disabled by the remote operator; for further information, refer to the &quot;HP -IB Status
Advisory’ Detailed Operating Instruction,
Lo
E
Ta
&gt;
=
ASEOB OSCILLOSCOPE MEASUREMENTS
CREAR TT ho RAL АУ
80-342
Figure 3-11. HP-IB Status Advisory
3-24. Remote Mode.
Remote Capability. The instrument communicates on the bus in both remote and local modes, inremote, ali but a fewofthe
front panei controls are disabled. The exceptions are the LINE switch, E, | a and the CRT display adjustments.
When Local Lockout is in effect, the return-to-local key sequence E is also disabled,
The Control Knob can be enabled and assigned to specific functions white the instrument is in remote mode. This allows a
local operator to make measurements or change settings under program direction. The procedure for this is described in the
“Control Knob” Detailed Operating Instruction,
The Measurement System can be addressed to listen or talk while inremote mode. When addressedto listen, the instrument
automatically stops talking and responds to Data messages. When addressed to talk, the instrument stops listening and sends
either a Data message or the Status Byte. Whether addressed or not, the Measurement System responds to the Locai, Loca!
Lockout, Clear Lockout/Set Local, and Abort messages and, in addition, the Measurement System may issue the Require
Service message. Although the 1880A/B does not respond to the Trigger message, this message is decoded and available for
use by either plug-in or internal options.
3-20
Model 1980A/8 Operation
ESTA
ARE
Local-to-remote Mode Changes. The Measurement System switches to remote upon receipt of the Remote message. The
Remote message has two parts:
* Remote Enable (REN) bus contro! Hne true
* Device listen address (MLA) received once while REN is true
All instrument settings remain unchanged with the local-to-remote transition. However, the remote-to-local transition does
mode.
If the Measurement System is set to listen-only or talk-only mode, the local-to-remote transition is inhibited.
3-25. Local Mode.
Local Capability. In local, the Measurement System's front pane! controls are operational. Although it will not respond to
input Data messages in local mode, if addressed to talk, the instrument can send Data messages and the Status Byte,
Whether addressed or not, the instrument responds to the Remote, Local, Local Lockout, Clear Lockout/Set Local, and Abort
messages. it also can issue the Require Service message in local mode.
Remote-to-local Mode Changes. The instrument always switches to local from remote whenever it receives the Local
message {GTL} or the Clear Lockout/Set Local message. {The Clear Lockout/Set Local message sets the Remote Enable
controf linefREN|false.} If it is not in Local Lockout mode, the instrument also switches to local from remote when the key
sequence | LE is pressed.
The instrument's settings remain unchanged during remote-to-local transitions. if the HP-IB status advisory is enabled, the
remote indicator (+) turns off as the remote-to-local change is made.
3-26. Local Lockout,
When program control is interrupted, which can happen by returning the instrument to local via the front panel keystroke
sequence, data or settings could be changed. This would leave the instrument in an unknown state. To prevent this, a focal
lockout ts recommended. Local lockout allows return-to-local only under program control.
Note
Return-to-locatl can also be accomplished by turning the instrument off, then on
again with the LINE switch. However, this technique has several potential
disadvantages:
* it defeats the purpose of local lockout (that is, the system controller may
lose control of the instrument).
* Other HP-IB conditions reset to default states at power-on.
3-27. Addressing.
The Measurement System interprets the byte on the eight bus data lines as an address or a bus command if the bus is in the
command mode (Attention control linel ATNiiruel, In addressable mode, the instrument may be addressed to listen or to talk.
3-21
Operation Model 1980A/B
Once addressed to listen, the instrument remains configured to listen until it receives an Abort message (IFC), its own talk
address (MTA), or a universal unlisten command (UNL} from the controller. Once addressed to talk, the instrument remains
configured to talk until it receives an Abort message {IFC}, another instrument's talk address {OTA}, its own listen address
(MLA, or a universal untatk command (UNT). if the status advisory is enabled, it indicates on the CRT when the instrument is
addressed to talk (7) or addressed to listen [1].
The Measurement System is shipped from the factory in the addressable mode, with its talk and listen addresses set to &quot;7&quot; (ie,
T7 and L7}. Refer to table 3-30 for equivalent address codes. The instrument can also be configured in the talk-only or listen-
only mode. These modes enable limited bus operation without an HP-IB system controller. The instrument s address and
addressing mode may be displayed or changed from the front panel using the soft keys. Complete instructions for these
procedures are in the “HP-IB Address” Detailed Operating instruction, |
Listen-only Mode. if the instrument is set to listen-only mode, it is always configured as a listener and responds to all Data
messages sent on the HP-1B. However, it cannot output Data messages and it is inhibited from responding to the Remote,
Local, Local Lockout, Clear Lockout/Set Local, or Abort messages. Also, it is disabled from issuing the Require Service
message and cannot respond to a serial poil.
Note
in listen-oniy mode, the front panel is enabled {the instrument does not enter
remote mode}. Therefore, settings can be changed while a program Is executing.
Talk-only Mode. If the Measurement System is set to talk-only mode, it is always configured as a talker and does not respond
to any of the bus messages. Although the talk-only mode may be selected from the front panel, it is not supported by the
1980A/B standard firmware.
3-28. HP-15 Turn-on Defauit Conditions.
Several HP-1B parameters are reset at power-on. However, both the instrument'saddress and addressing mode are preserved
in nonvolatile memory,
HP-iB parameter default conditions are:
* HP-IB local mode
Local-lockout cleared
* Unaddressed {if in normal addressing mode;
* ROS mask cieared
Service Request message cieared
Status byte register cleared
HP-IB status advisory enabled
3-22
Model 1 980A/B Operation
3-29. Data Messages.
The Measurement System communicates on the HP-IB primarily with Data messages. The Measurement System interprets
the byte on the eight bus data lines as a Data message when the bus is in the data mode (Attention control line |ATN false).
The instrument can both receive and send Data messages. Input Data messages include the instrument's program codes
(device-dependent commands} used to program front panel functions, menu functions, and ali remote functions. Qutput Data
messages include instrument status information and the settings of specific functions. ВЕ
Of special consideration is the Learn String which can be sent and received by the instrument. It is a binary data string that
contains a condensed coding of the entire instrument state. The Learn String is described in paragraph 3-32 andinthe ‘Learn
Mode’ Detailed Operating Instruction.
The HP-IB Codes and Format Summary (paragraph 3-55) provides a list of all program codes for the 1 980A /B. This summary
includes a brief description of each code, specific format requirements, and a cross reference to further information in the
Detailed Operating Instructions.
3-30. Receiving the Data Message.
The Measurement System responds to Data messages when in remote mode (REN control line true} and is addressedto listen
or when it is in listen-only mode.
Input Data Message Format, Input Data messages contain a string of device dependent commands {program codes! and an
End-of-String (EOS) message. The program codes within a Data message are executed after the EOS message is received.
The following format rules must be observed in al&iacute; input Data messages:
A linefeed &lt;LF&gt;] is used as the End-of-String (TOS) message. Each Data message must be terminated by a(&lt;LF&gt;).
+
Except during Learn String transfers, the carriage return character {&lt; CR &gt;} is not required before &lt;LF&gt;. Preceding
&lt;LF&gt;, &lt;CR&gt; is treated as “no operation’ and may be repeated as many times as permitted by the maximum string
length limitation.
When several program codes are sent in a Data message, a semicolon {;) must be used io delimit each program code
except the last one in the string.
Spaces (&lt;SP&gt;) are not aliowed within input Data messages except as defined in the program code format
description. |
The maximum length of a Data message string is 127 characters (including: semicolons, commas, &lt;SP&gt;, &lt;CR&gt;, and
&lt;LF&gt;). |
Errors in Data message syntax are trapped and can be reported via The HP-IB, For details about detecting and reporting format
errors refer to the &quot;HP-IB Syntax Errors’ Detailed Operating Instruction.
3-23
Model 1980A/B
General Input Data Message Format:
&lt;program code &gt;|;&lt; program code&gt;}...\;11&lt;CR&gt;1&lt;1F&gt;
Device dependent EOS message
command
Delimiter is required | e Optional characters
to separate multiple (not required
commands within Data before EOS)
message
Multiple device dependent
commands are allowed -
up to maximum string length
of 127 characters
Program Order Considerations. Measurement System functions may be programmed in practically any order from the HP-
iB. However, it is recommended that program code sequences should be in the same order used for front-panel operation.
Generally, this requires that functions be set up starting with the most basic parameter to be changed. For example, before
entering channel 2 deflection factor, turn on channel 2. |
If a plug-in or internal option for the instrument imposes any other order considerations, the manual for that option provides
the necessary programming information.
Table 3-5 lists typical processing times for some sample Data messages. To minimize the processing time in a given
application, use the learn string and save/recall registers to establish instrument configuration. When sending a series of
program codes to the 1980A/B, processing time can be reduced by combining them into as few Data messages as possible.
For example, note the execution time for the last two Data messages in table 3-5.
Program Code Format. Program codes consist of a two letter function identifier {i.e., prefix} and a parameter field. Suffixes
are not used in 1980A/B program codes. The two letter identifier is a mnemonic that defines the major instrument function
being addressed. Depending upon the identifier, the associated parameter field may contain zero, one, or multiple
parameters. The general rules of program code format are:
The 1980A/B sends and receives Data messages in standard ASCII code.
The instrument responds equally to upper and lower case characters.
Parameter fields containing multiple parameters require a comma {,} to delimit individual parameters.
Program codes are space sensitive, Within program codes, spaces are accepted only immediately following function
identifiers or parameter delimiters. (Exponential numericentries use the character “&quot;E’ or “e” as a delimiter between
the mantissa and the exponent, spaces may follow “E”, “e”, or comma.)
Program code parameters are of five types, these are: integers, decimals, exponentials, ASCII character strings, and binary
data. Integer, decimal, and exponential parameters can be signed or unsigned. Specific format requirements for all program
codes are given inthe Detailed Operating Instructions section of this manual. They are also condensed in the HP-1B Codes and
Format Summary.
Errors in program code format can be trapped and reported via the HP-IB. Refer to the &quot;HP-IB Syntax Errors’ Detailed
Operating Instruction for a description of how to detect and report program code format errors.
3-24
Model 1980A/B
Table 3-5. Typical Processing Times for Various Commands
Operation
Data Message
Execution Time*
Function/ Comments
(Typical
SK7,1&lt;CR&gt;&lt;iLF&gt; 450 msec Recall instrument state from register 1.
SK6,1 &lt;CA&gt;&lt;LF&gt; 200 msec Save instrument state in register 1.
IN&lt;CR&gt;&lt;LF&gt; 380 msec Execute initialize,
AS&lt;CR&gt;&lt;LF&gt; 3.2 sec Execute autoscope, calibrator connected to both channei 1
and 2,
SA&lt;CR&gt;&lt;LF&gt; 2.7 sec Execute selective autoscope, one channel onwith calibrator
connected.
TX1, &lt;any string &gt; 20 msec Write text on line 1 of the CRT text field.
RC1,1&lt;CR&gt;&lt;LF&gt; 64 msec Assign Control Knob to channel 1 deflection factor, fine
resolution,
VM2&lt;CR&gt;&lt;LF&gt; 70 msec Turn on channel 2 only.
VS1,+2.00 E-3&lt;CR&gt;&lt;LF&gt; 40 msec Enter channel 1 deflection factor of 2 mV/div. 1f polarity
change is made, add 54 msec.
VC1,2&lt;CR&gt;&lt;LF&gt; 82 msec Select DC coupling for channel 1.
HM2&lt;CR&gt;&lt;LF&gt; 114 msec Select intensified horizontal mode; time given is for change
from main mode.
HM3&lt;CR&gt;&lt;LF&gt; 70 msec Select delayed horizontal mode, time given is for change
from intensified mode.
MS50.0E -6&lt;CR&gt;&lt;LF&gt; 55 msec Enter main sweep speed of 50 usec/div.
DY200E -3&lt;CR&gt;&lt;LF&gt; 50 msec Enter delay time of 200 msec.
DL200&lt;CR&gt;&lt;LF&gt; 28 msec Enter delayed trigger level of 2 div, internal source selected.
VM2; VC2, 2:;VS2, + 2.00E-3 140 msec Enter channel 2 coupling and sensitivity. Note the execution
&lt;CR&gt;&lt;LF&gt; time improvement when severai program codes are sent in
a single Data message. |
HM2; MS50.0E-6; MM; 260 msec Select horizontal mode and main sweep speed, mode,
MT+ 1,4; ML200&lt;CR&gt;&lt;LF&gt;
trigger source, slope, level, and coupling.
*Execution time is measured from receipt of EQS message { &lt;LF &gt;}. Maximum data input rate is 127 usec/ character.
3-25
Operation Mode! 1980A/B
[{&lt;UNL&gt;]&lt;OTA&gt;&lt;MLA&gt;! AS &lt;CR&gt;&lt;LF&gt;
*Bus addressing commands EOS message
Execute autoscope
[[&lt;UNL&gt;]&lt;0OTA&gt;&lt;MLA&gt;} IN,;8K0,2,3 &lt;CR&gt;&lt;LF&gt;
| Execute delay and balance
self-cal routines
Execute initialize
|&lt; ММ. &gt; |&lt; ОТА&gt; &lt; МЕА&gt; ММ 1; М5 1, +2.50е - ОЗ; МС 1, 3 &lt; СВ &gt;&lt; [В &gt;
Select vertical Set channel 7
mode: channel 1 coupling: AC
only
Set channel 1 deflection factor to
+ [non-inverted}2.5 mV / division
*The bus addressing commands perform the following functions:
UNL - Unlisten unaddresses all current listeners.
OTA - Other Talk Address is the talk address of some instrument other than the 1980A/B. in these
examples, OTA would be the talk address of the controller.
MLA - My Listen Address is the listen address of the 1980A/B.
Figure 3-12. 1980A/B Input Data Message Examples
3-31. Sending the Data Message.
The instrument can send Data messages in local or remote mode, when it is addressed to talk or in the talk-only mode.
Note
Before the instrument is addressed to talk, the desired output data must be
specified with the appropriate input Data message. Otherwise, the Measurement
System outputs the ASCII character “E” by defaultto complete the bus transaction.
Output Data Message Format. Output Data messages inciude the settings of individual functions, instrument status
information or binary Learn String data. Excluding the Learn String, there are three output data types: integer, decimal, and
exponential. All output Data messages contain a leading space (&lt; SP &gt;) followed by the function value or status data, &lt;CR &gt;
and &lt;LF &gt; are sent as the EOS message for ati output data except the Learn String. The Learn String uses the EO! bus control
line to signal end-of-string.
3-26
Model 1980A/B Operation
a:
ser
For more information about output Data messages, refer tothe &quot;Reading Values Via HP-IB&quot;, “Instrument Status”, and Learn
J, Mode” Detailed Operating Instructions,
Note
Exponential values are sent by the 1980A/8 with the ASCII character E”
fuppercase) as the delimiter between the mantissa and the exponent.
General Output Data Message Format:
&lt;SP&gt;{i+|-:&lt;Setting or status data&gt;&lt;CR&gt;&lt;LF&gt;
1
EOS message
Most output Data
Messages are
signed Output data contains a
maximum of 1b characters
3-32. Learn Mode.
If the Measurement System receives a TE” (Teach) program code andis then addressed to talk, it sends the Learn String. The
Learn String consists of 80, 8-bit bytes containing information about front panel configuration. This binary data can be stored
in the controller's memory for future use. The Learn String includes only those parameters that can be stored in the
instrument's internal Save/ Recall registers. The contents of the Save/Recall registers, however, are not included in the
Learn String. Refer to the “&quot;Save/Recail” Detailed Operating Instruction for information about register limitations.
Note
The 80th byte of the Learn String is sent with the bus EOi line true, to indicate end-
of-string.
When the Measurement System is addressed to listen, the binary data can be returned to it in a 80 byte string. The
Measurement System interprets the first two bytes to determine that this is a Learn string. Following the 80th byte, the
transfer must be terminated with &lt;CR=&gt; and &lt;LF&gt;. When the &lt;LF&gt; is received, the instrument changes state according to
the Learn String contents.
Note
During the transfer of the Learn String, the instrument can not be readdressed. if it
is the transfer will be aborted. The 80 byte string should be sent or read by the
controller using a technique that does not readdress bus devices.
For more information about using the Learn String, refer to the “Learn Mode” Detailed Operating Instruction.
3-33. Receiving the Clear Message.
The Measurement System does not respond to the Clear message. However, the instrument can be placed in a known state
using the Preset menu function (HP-IB “IN” program code). Refer to the “Initialize” Detailed Operating Instruction for more
information,
3-27
ST E
Я ET I,
Receiving the Trigger Message.
The 1980A/8 does not respond to the Trigger message {GET bus command), although the message isreceived and available
to internal and plug-in options.
3-35. Receiving the Remote Message.
The Remote message has two parts. First, the remote enable bus control line {REN} is held true, then the device listen address
is sent by the controller, The Measurement System Is enabled to go into remote when REN goes true but it does not actually
switch into remote until addressed to listen the first time. No instrument settings are changed by the transition from local to
HP-IB status advisory to indicate remote mode.
3-36. Receiving the Local Message.
The Local message returns the Measurement System to front panel control. The Local message (GTL bus command}
addresses the instrument to listen and then switches it from remote to local mode. Hf the HP-1B status advisory is enabled, the
remote indicator {&amp;) will turn off when the Local message is received. No instrument settings are changed by the remote-to-
local transition,
Although the Local message returns front panel control, it does not clear local lockout. Unless the instrument receives the
Clear Lockout/ Set Local message, if local lockout is in effect, it will return to local lockout mode the next time it goes to
remote.
3-37. Receiving the Local Lockout Message.
The Local Lockout message (LLO bus command) disables the Measurement System's front panel return-to-local keystroke
sequence. Local Lockout is accepted when the instrument is in either remote or local mode. Afterwards, whenever the
Instrument 1s in remote mode, lockout 1s in effect. While the instrument is in local lockout, the remote-{o-lccal transition can
only be made from the system controller by sending the Clear Lockout/Set Local message or the Local message.
3-38. Receiving the Clear Lockout/ Set Local Message.
The Clear Lockout/Set Local message (REN control line false} returns the Measurement System from remote to local mode
and clears the local lockout condition. No instrument settings are changed by this message. It is accepted while the
instrument is in either remote or local mode. if the instruments in remote mode, the remote indicator {i} is blanked when the
Clear Lockout/Set Local message is received.
3-39. Receiving the Pass Control Message.
The instrument does not impiement the controller subset, therefore, it does not respond to the Pass Control message.
3-40. Sending the Require Service Message.
The Measurement System sends the Require Service message (by setting the SRQ bus control line and bit 7 of the status byte
true) when a previously programmed condition occurs. The instrument can send the Require Service message in either local
or remote mode. The Require Service message is cleared when a serial poll is executed by the system controller. During serial
poll, the SRQ control line is reset immediately before the instrument places the Status Byte message on the bus. Figure 3-13
3-28
Operation Model 1980A/B
Operation
dE
includes the conditions that can be selected to cause the Require Service message. if no conditions are selected, the Require
Model 1980A/B
Service message is disabled.
The Measurement System indicates having sent the Require Service message by displaying &amp; in the HP-IB status advisory.
This indicator is turned off during the serial poll when the SRQ control line is reset.
M the Measurement System is set to either listen-oniy or talk-only mode, it can not send the Require Service message.
For complete information about programming the condition that causes the Require Service message, refer to the &quot;Service
Request Condition” Detailed Operating Instruction.
Bit 8 7 6 5 4 3 2 1
Mask
Weight 128 64 32 16 8 4 2 1
Service SRO ROS Plug-in Internal Advisory End Key НР-1В
Request Key Bit Option Option or of Ciosure Syntax
Condition Request | Request Error Sweep Error
Notes: 1, Teo set the ROS bit and SRO bus control Ime true, the condition must be enabled in the ROS mask.
2. if no condition is enabled, the 1980A/8 can not set the SRO bus contro! linenorine ROS bit true. However,
bits 1-6 and 8 of the status byte are set to indicate which conditions have occurred.
Figure 3-13, The Status Byte and the ROS Mask
3-41. Sending the Status Byte Message.
The Status Byte message consists of one 8-bit byte in which the bits are set according to the conditions describedin figure 3-
13. The Measurement System sends the Status Byte message when it is addressed to tatk and it receives the Serial Poll
Enable {SPE} bus command from the HP-IB system controller, After the message is transferred to the controller, ail bits are
cleared by the Serial Poll Disable (SPD) bus command, the Abort message, or if the instrument is unaddressed to tak.
if the instrument is set to either listen-only or talk-only mode, it does not respond to the SPE or SPD commands and can not
send the Status Byte.
The Measurement System has two modes for transferring status information with the status byte:
if the Required Service message is not enabled (that is, if the RQS mask value is 0}, a single status byte is available from
the instrument. The bits in this byte are set to indicate ali conditions that have occurred since the byte was last reset. In
this mode, the RQS bit (bit 7 of the status byte) is always false. Figure 3-14 contains a typical flowchart for reading
instrument status when the Require Service message is disabled.
if the Require Service message is enabled, as many as nine separate occurrences can be queued in a status byte
register stack. Each byte in the stack has two bits set true: The RQS bit (bit 7} and the bit correspondingto the condition
that occurred. The status register stack is read on a first-in, first-out basis by serial polling the Measurement System
repetitively until it does not send the Require Service message. If there are more than nine occurrances before the
register stack is read, the stack will contain the codes for the first eight conditions and for the last condition that
occurred. Figure 3-15 contains a flowchart for reading instrument status using the Require Service message.
3-29
Operation Model 1980A/B
BEGIN
STATUS CHECK
SERIAL POLL
1980A/B
(READ STATUS
BYTE MESSAGE)
STATUS BYTES
- O07 _ pt
TEST BITS
1-6,8 FOR
ALL
CONDITIONS
CALL
CORRESPONDING
SERVICE
ROUTINES
aff
Y
END
STATUS CHECK
Figure 3-14. Serial Poll With Require Service Message Disabled (RQS Mask Value = О}
To supplement the information in the Status Byte, there are status qualifier registers that can be read to determine which
error occurred, which key was pressed, etc. For more information about using the status reporting features of the
Measurement System, refer to the “Instrument Status” Detailed Operating Instruction,
3-42. Sending the Status Bit Message.
The Measurement System does not respond to a Parallel Poli Enable (PPE) bus command; it cannot send the Status Bit
message.
3-30
Model 1980A/8
Operation
Gly
BEGIN
STATUS CHECK
TS
SRO LINE &gt;
TRUE? ~~
SERIAL POLL
1 980A/B
(READ STATUS
BYTE MESSAGE]
TIS TN
SIT 7{ROS) YES
&gt; TRUE? 7
NO TEST BITS
1-6,8 FOR
Y INTERRUPT
- CONDITION
POLL OTHER
INSTRUMENTS
CALL
CORRESPONDING
| SERVICE
if]. ROUTINE
-
Y
END
STATUS CHECK
Figure 3-15. Serial Poll Using the Require Service Message (ROS Mask Value &gt; Oj
3-43. Receiving the Abort Message.
The Abort message (IFC control line true) halts all bus activity. When the Measurement System receives the Abort message it
becomes unaddressed and stops talking or listening. The Require Service message and the Status Byte are unaffected by the
Abort message.
3-31
Operation
Model 1980A/B
3-44. OPERATOR'S CHECKS.
3-45, (Confidence Test.
Description Confidence Test can be executed from the front-panel to confirm that the internal 1980A/8 hardware and
Procedure
Indication
Response
Comments
3-32
software is functional. This test does not verify that the 18980A/B is operating to specifications. Only aprobe or
BNC cable is required to execute Confidence Test.
sg spe ne ng ns
Select the FINES TEST menu by pressi na fe 4; Pipe PON BEE Tie nh ede Hed he
Then, connect the calibrator signal to the vertical channel to be tested. To execute the test, press any key except
A
To exit the COHFIDEHCE TEST menu without performing the test, press 0 PREU&Iacute;OUS MERLE
if the instrument passes the Confidence Test, the “ENT TEST advisory message is displayed on the CRT.
If the instrument fails the Confidence Test, an error message is displayed in the LED Readout that indicates
which failure was detected. The test is then aborted, the 1980A/B executes an autoscope to initialize itself,
and the advisory FrHILED TEST isdispiayed. The error messages that may be displayed during the Confidence
Test are listed in table 3-6.
If no signal is applied to either input channel when the Confidence Test is executed, the Su message
SIGMEL MOT FOLD is displayed on the CRT in addition to the error message
Table 3-6. Confidence Test Error Messages
Error Message Error Description
Err - 3 | | No signal found at channel 1 or 2.
Err - Зе Horizontal range error
Е Err - 33] 10V range error
Err —-3 -34| 1V range error
[E rm 6 | 0.1 range error
Err - ЗБ] 0.02 range error
If a failure is detected by the Confidence Test, the instrument might be useable but it does require servicing.
At the end of the Confidence Test, the Measurement System executes an autoscope on the calibrator signal {at
output level of 1 Vp-pi. Previous front-panef settings are not preserved by this test. However, the Save/Recall
registers and HP-IB status information are not changed,
The Confidence Test requires a front panel key closure to execute. The test cannot be executed via the НР-1В.
Sika can not be used to turn off the menus when the Z&uuml;HFTDEMOE TEST DOOF
IT&quot; menu is displayed.
Model 1980A/B Operation
3-46. Memory Check.
Description There are two memory checks: ROM Checksum and RAM Test. These checks assure that the 1980A/B
memory is operating properly and that it contains valid data.
Procedure Both memory checks are in the iii
{TIE menu which is called with the key sequence:
OPTION
TENE
GRENIER YT TEA
1 eur _ prop at peta en, ERE 7.) Pe DORE EL TI e 7 я
To execute ROM Checksum, select the &iexcl;AT Ti. TTI&pound;X menu, then press CS SUP CRECES:LA, This routine
can also be executed via the HP-IB by sending the Data message:
IN.SKO,2,4,6 &lt;CR&gt;&lt;LF&gt;
To execute the RAM Test routine, select the 1.T 11.17 1&pound;5 menu, then press 3: Ens TEST, This check can
also be executed via the HP-1B by sending the Data message:
IN:SK0,2,4,5 &lt;CR&gt;&lt;LF&gt;
indication When the instrument passes either the ROM Checksum or RAM Test, the advisory PRESET TEST is displayed
on the CRT,
If the instrument fails a ROM Checksum or RAM Test, an error message is displayed in the LED readout that
indicates where in memory the faiure occurred. When the first error is detected, the routine is aborted and the
advisory FHTLEU TEST is displayed.
Response If the instrument fails either the ROM Checksum or the RAM Test, it might be useable, but it does require
servicing.
Comments Executing either the ROM Checksum or the RAM Test causes the advisory messages to be enabled. However,
there are no other changes in instrument front-panel settings or status.
E
3-47. HP-1B1/0 Check. &laquo;za
Description The following procedures check the Oscilloscope Measurement System's ability to process or send ali of the
applicable HP-IB messages described in table 3-3. In addition, the instrument’s ability to recognize its HP-1B
address is checked and all of the bus data, handshake, and control lines except DIO8 are set to both their true
and false states. These procedures do not check whether or not all Measurement System program codes are
being properly interpreted and executed by the instrument, however, if front panel operation is correct, the
program codes, in all likelyhood are correctly implemented. |
The validity of these checks is based upon the following assumptions:
The instrument performs correctly when operated in local mode, This can be verified with the
Confidence Test and the Memory Check (ROM Checksum and RAM Test) procedures in paragraphs 3-
45 and 3-46 respectively,
The bus controller properly executes HP-IB operations as defined by IEEE Std. 488.
The bus controller's HP-IB interface properly executes the MP-IB operations.
3-33
Operation
Equipment
Setup
Procedure
3-34
Model 1980A/B
If the Measurement System appears to fail any of these HP-1B checks, the validity of the above assumptions
should be confirmed before attempting to service the instrument.
The controlier's HP-IB interface select code is assumed to be “7”. The Measurement System is assumed to be
in the addressabie mode with address &quot;7&quot; (T7/L7\ selected. This select code-address combination (that ts,
707) is not necessary for these checks to be valid. However, program lines in this procedure would have to be
modified for any other combination.
These checks are intended to be as independent of each other as possible. Nevertheless, the first four checks
should be performed in order before the other checks. Any special initialization or requirements for a check are
described at its beginning.
HP-IB Controller creer HP 9825/98213A &iexcl;General and Extended 1/0 ROM)
-Or- HP 9835/98332A (1/0 ROM)
-or- HP 9845 (with HP-IB 1/0}
HP-IB interface nes HP 98034A (revised)
Connect the Measurement System to the bus controller via the HP-1B Interface.
Address Recognition. This check determines if the Measurement System recognizes when it is being
addressed and when it is not. This check assumes only that the instrument can properly handshake on the bus.
Before beginning this check, set the Measurement System LINE switch to OFF, then to ON.
Description HP 9825 HP 9835/45
{HPL} (BASIC!
Set Remote Enable (REN! line false. icl 7 LOCAL 7
Send the 1980A/B listen address. wrt 707 OUTPUT 707
The HP-iB status advisory should read: HF - Lis: €
Unaddress 1980A/B by sending a different listen wrt 721 QUTPUT 721
address.
The HP-IB status advisory should turn off.
Remote and Local messages and | NT This check determines if the Measurement System properly
switches from local to remote control, from remote to local control, and whether the key sequence: Fn
returns the instrument to local control. This check assumes that the Measurement System is able to both
handshake and recognize its own address. Before beginning this check, set the Measurement System LINE
switch to OFF, then to ON.
Model 1980A/B | Operation
CE
En E т. &Eacute;s
EE ba RT,
_ ) Description HP 9825 HP 9835/45
; ; {HPL} (BASIC)
Send Remote message by setting the REN line true rem 707 REMOTE 707
and addressing 1980A/B to listen.
The HP-IB status advisory shouid read: Hi - fis FL
Send Locai message to 1980A/B. ici 707 LOCAL 707
aw pi,
The HP-IB status advisory should read:
Send Remote message to 1880A/B. rem 707 REMOTE 707
HP-I3 status advisory should read: +
by HE
8 5
Press | 4 . The status advisory should change to read:
Receiving the Data Message. This check determines if the Measurement System properly receives Data
messages. This check assumes the instrument is able to handshake, recognize its own address, and properly
make the remote/local transition. Before beginning this check, set the Measurement System LINE switch to
OFF, then to ON.
Description | HP 9825 HP 9835/45
(HPL) (BASIC)
Set REN line true. rem 7 REMOTE 7
Address *980A/B to listen and send the Data wrt 707, “AS” QUTPUT 707, “AS”
message ‘execute autoscope
Check that the instrument executes an autoscope and that the HP-IB status advisory reads: id - tx Hi
Sending the Data Message. This check determines if the Measurement System properly sends Data
messages. It also verifies the the 7 least significant HP-IB data lines can be sent and received in both their true
and false states. This check assumes the instrument is able to handshake, recognize its own address, make
remote/local transitions, and receive Data messages. Before beginning this check, set the Measurement
System LINE switch to OFF, then to ON and press Sear
3-35
Operation
GEIS
3-36
Model 1980A/B
Description HP 9825 HP 9835/45
{HPL) (BASIC)
Send Remote message to 1980A/B. rem 707 REMOTE 707
Send a Data message to 1980A/B which instructs it wrt 707, “OF2” QUTPUT 707; &quot;OF2&quot;
to output the value of channel 2 deflection factor.
Address 1980A/8B to talk and store its output data in red 707, A ENTER 707; A
variable &Agrave;.
Display value of &Agrave; dsp &Agrave; DISP A
The HP-IB status advisory should read: TE: RT
The controller's display should read 2.00 (9825) or 2 (9835/45)
Local Lockout and Clear Lockout/ Set Local Messages. This check determines if the Measurement System
properly receives the Local Lockout message and the Clear Lockout/ Set Local message. This check assumes
that the Measurement System is able to handshake, recognize its own address, and properly make the
remote/local transitions. Before beginning this check, set the Measurement System LINE switch to OFF, then
to ON.
Description HP 9825 HP 9835/45
(HPL) (BASIC)
Send Remote message to 1980A/B. rem 707 REMOTE 707
Send Local Lockout message. Ho 7 LOCAL LOCKOUT 7
The HP-IB status advisory should read: НВ В
should remain unchanged.
Press: E que. Advisory SCOPE UNDER REMOTE COMTE, should be displayed and the status advisory
Send the Clear Lockout/Set Local message. lel 7 LOCAL 7
HP-IB status advisory should read: Не ЗО: 1.
Set REN line true. rem 7 REMOTE 7
Address the 1980A/B to listen. wrt 707 OUTPUT 707
‘ua
Press; &copy; 2. The HP-IB status advisory should read:
Model 1980A/B Operation
GEE
Abort Message. This check determines if the Measurement System becomes unaddressed when it receives
the Abort message. This check assumes that the instrument is able to handshake, recognize its own address,
and make the remote/local transitions. Before beginning this check, set the Measurement System LINE
switch to OFF, then to ON,
Description HP 9825 HP 9835/45
{HPL) {BASIC)
Send the Remote message to 1980A/B. rem 707 REMOTE 707
Jeria
HP-1B status advisory should read: + PE: В
Send the Abort message unaddressing 1980A/B. cit 7 ABORTIO 7
If using a HP 9825, check that the HP-IB status advisoryreads: tf - &iquest;Ei E Husinga HP 9835 (or 9845), check
that the HP-1B status advisory is turned off. {The 9835 and 9845 send the Local message and the Abort
message with the ABORTIO command.)
Send Local message (HP 9825 only). lc! 707 The Local message
was sent with
ABORTIO statement.
Address 1980A/B to talk. red 707 ENTER 707
Send Abort message unaddressing 1980A/8B. cli7 “ ABORTIO 7
Check that the HP-IB status advisory is off.
Require Service Message. This check determines if the Measurement System can issue the Require Service
message {set the SRQ bus line true), This check assumes that the Measurement System is able to handshakes,
recognize its own address, make remote/ local transitions, and receive Data messages. Before beginning this
check, set the Measurement System LINE switch to OFF, then to ON.
Description HP 9825 HP 9835/45
{HPL) | (BASIC)
Set REN line true. rem 7 REMOTE 7
Address 1980A&Acirc;/B to listen and send a Data message wrt 707, “IM2” OUTPUT 707; “IM2”
enabling a Require Service message to be sent if a
key closure occurs,
MA: , pee NE
Press ima. HP-IB status advisory should read: HE - TE Pel
3-37
Operation Model 1980A/B
reste
&quot;E Rs) At
Read binary status of the controller's HP-iB rdsi7)-&gt;A STATUS 7; A
interface and store data in variable A,
Display value of SRQ bit. dsp “SRQ=&quot;, DISP “SRQ =&quot;;
bit {7,A} BIT (A, 7)
The SRQ value should be displayed as 1.00 (9825) or 1 (9835/45), indicating that the Measurement System
issued the Require Service message.
Status Byte Message. This check determines if the Measurement System sends the Status Byte message in
both local and remote modes. This check assumes that the Measurement System is able to handshake,
recognize its own address, and make locai/remote transitions. Before beginning this check, set the
Measurement System LINE switch to OFF, then to ON.
Description HP 9825 HP 9835/45
(HPL) (BASIC)
Conduct a serial-poil and display Status Byte value. — rds (707) STATUS 707; A
DISP &Agrave;
Check that the HP-1B status advisory remains off and the controller display reads: {HHP 8825) or HP 9835
and 98451.
Press TL.
Send Remote message to 1980A/B. rem 707 REMOTE 707
Conduct a serial-poll and display Status Byte value. rds (707) STATUS 707; A
DISP A
HP-1B status advisory should read: „TE EL
Controller display shouid read 130.00 (HP 9825} or 130 (HP 9835/48).
3-48. OPERATOR’S CALIBRATION AND ADJUSTMENT.
3-49. Delay Time Self-cal.
Description To maintain the specified delay time performance, execute the following delay self-calibration procedure
approximately once each hour,
Procedure The delay time self-cal can be executed with the key sequence:
3-38
Model 1980A/B | | Operation
Indication
Response
It can also be executed via the HP-IB by sending the Data message:
IN: SKO,2,1&lt;CR&gt;&lt;LF&gt;
As the delay seif-cal is executing, the LED readout displays a number which represents the relative delay drift.
As the drift is nulled, this displayed number approaches zero. When the self-cal routine is finished, the
Measurement System is restored to the settings it had before the self-cal was initiated.
If the drift cannot be corrected by the self-cal routine, the instrument executes the self-cal repetitively until a
key is pressed or the LINE switch is cycled OFF and ON.
To express the delay drift in terms of percentage error, divide the value displayed in the LED readout by
1989.87. For example, if the value “30” is displayed, the drift is; 30/1999.87 =0.015%
If the self-calibration routine cannot correct the drift entirely, internal adjustment is required. Although the
Measurement System may still be functional, it does require servicing.
2-50. Vertical Balance Self-cal.
Description The vertical balance self-cal routine nulls gain dependent offsets in the vertical pre-amplifiers. The self-cal
Procedure
indication
Response
routine virtually eliminates baseline shift as vertical deflection factor is changed. The balance self-cal should
be performed whenever there is noticeable shift of the vertical baseline as deflection factor is changed.
To execute the balance seif-cal from the front panel of the 1980A/B, press the following key sequence:
The balance self-cal can be executed via HP-1B by sending the Data message:
IN;SKO, 2,2 &lt;CR&gt;&lt;LF&gt;
Note
Do not apply any signals to channel 1 or 2 inputs while executing the balance self-cal procedure.
While balance self-cal is executing, advisory message SRL FAMHCE SELE CEL HI for CHE) Is displayed on |
the CRT. When the balance routine is finished, the Measurement System is restored to the same settings it
had before the self-cal was initiated.
If the balance routine cannot calibrate one of the vertical channels, an error message is displayed inthe LED
readout to indicate which channel failed. The instrument can be programmed to issue the Require Service
message to signal this failure, see the “Error Messages” and “Service Request Condition” Detailed Operating
Instructions for further information.
Although a vertical balance self-cal failure indicates the Measurement System should be checked by qualified
service personnel, the accuracy of measurements taken with the instrument are not impaired.
3-39
Operation
Model 1980A/B
3-51. CRT Adiustments.
Description Controls are provided on the front-panel of the 1880A/B for operator adjustment of the CRT display. Because
Procedure
trace alignment with the graticule is affected by the orientation of the instrument with the ambient magnetic
field, the display may have 10 be realigned after the instrument is installed or moved. The ASTIG and FOCUS
controls may have to be periodically adjusted for optimum focus.
Trace Alignment. With no signal applied to either vertial channel input, press IS
Using a small screwdriver or alignment tool, adjust the front-panel ALIGN control {on CONTROL panel) for
best alignment of trace with horizontal graticule lines,
Astigmatism and Focus. Set trace intensity to level 22, press and adjust with the Control Knob.
$ Ч
Select 1 vs 2 scope mode, press! SE
Ground channel 1 and 2 inputs, press 11189 (ch 1), DO ich 2).
Adjust ASTIG control for best spot shape {i.e., most radially symetric spot),
Adjust FOCUS control for smallest spot and for well defined characters,
3-52. Probe Compensation,
Description Probe compensation may be required because of variations in total input resistance and capacitance from one
Procedure
instrument or input to another. To compensate a probe, proceed as follows:
Connect probe to the input of vertical channel 1.
Connect the probe tip to the front-panel calibrator terminal.
Select DC coupling for channel 1, then execute a selective autoscope. Press Soe {ch 13] AUTO SGUPE
Adjust divider probe low frequency compensation for correct display figure 3-16),
3-53. DETAILED OPERATING INSTRUCTIONS.
3-64. Using the Detailed Operating Instructions.
These Detailed Operating Instructions contain all the information needed to operate the 1980A/B. The instructions are
arranged alphabetically; a functional index appears in table 3-1.
The following considerations should be remembered when using the Detailed Operating Instructions:
* Procedures and examples assume the instrument is in the initialized state (refer to the “Initialize” instruction.
* The procedures and examples for HP-IB operation include only the program codes (device dependent commands)
needed for remote operation. The HP-IB command mode messages {such as REN, MLA, MTA, and UNL} that are
3-40
Model 1980A/B | | Operation
OVER COMPENSATED
PROPERLY
COMPENSATED
UNDER COMPENSATED
HEWLETT SRR HRY
Figure 3-16. Divider Probe Adjustment Display
required in bus data transfers are not listed. General requirements for communicating with the 1980A/B are in
paragraph 3-19, Remote operation, Hewlett-Packard Interface Bus.
HP-1B program codes are listed in ASCII code. Table 3-30 contains conversions to other commonly used codes.
+
The notation conventions used to describe HP-IB codes are defined in paragraph 3-56, Notation Conventions and
Definitions.
3-41
Operation Model 1880A/B
Description The instrument generates advisory messages to indicate HP-1B syntax errors, incorrect key entries, and special
operating information. The messages are displayed on the CRT in inverse video. They can also be reported via
the HP-IB. The advisories can be disabled if desired.
Table 3-7 lists all advisory messages and describes the conditions which cause them. Figure 3-17 contains a
typical advisory message display.
80-339
Figure 3-17. Typical Advisory Message Display
Procedure Disable advisory messages with the key sequence:
EN ANUTENETES MN
Program Codes
Enable or disable the advisory message display:
AY &lt;state &gt;
state ! = 0 disable advisories
1 enable advisories
3-42
Model 1980A /B
Example
Indication
Comments
Related
Sections
Operation
Advisory
Disable the advisory message display.
Snow EA CALIBERTE 4 UTILITIES
LOCAL Cr IES
(keys) FTI T ECR TES 061
REMOTE | AVO&lt;CR&gt;&lt;LF&gt;
(codes) | identifier I L FEOS
state
When the advisory display is enabled or disabled from the front-panel, the 1980A/B acceptsthe key entry and
then exits the UTIL IT IED menu.
At power-on, the advisories are enabled as a default condition.
in remote operation, advisory messages can be programmed to cause a service request. This capability is
independent of whether the advisory display is enabled or disabled. For more information, refer to the “Service
Request Condition” Detailed Operating Instruction.
The “Instrument Status” Detailed Operating Instruction explains how to read the advisory code via the HP-1B,
Table 3-7 includes the HP-IB codes for the advisory messages.
The code for the Hi LE ZYRTHA BERRIES advisory can not be reported via HF-IB nor can this advisory cause a
service request. HP-IB syntax errors are handled separately, refer to the &quot;HP-IB Syntax Errors” Detailed
Operating Instruction for more information.
Character Generator
Error Messages
HP-IB Status Advisory
HP-1B Syntax Errors
Instrument Status
Service Request Condition
3-43
Operation Mode! 1980A/B
Advisory Messages (Cont'd)
Table 3-7. Advisory Message Description (Page 1 of 2)
Advisory Message Description HP-IB
Code
OPTION TRSTAL LET Hrs HO MEL — there is no menu display for the option selected. For more information, 1
refer to the operating information supplied with the option.
cannot be changed from the front-pane! while the delayed sweep is off. Instrument must be in V vs T mode
and in intensified, delayed, or dual horizontal mode.
RL TT ERES TA MT although the trigger qualifiers for the delayed sweep may be changed while it is 4
in auto-sweep mode, this sweep mode does not require a trigger signal.
FE TE sede BT the key pressed was not accepted, either the function is not allowed or there Is no current 5
function assignment.
CHARACTERS GENERFTOR CEP — character intensity cannot be changed when the characters are not 6
displayed.
CREE OFF OR TEIN SURGE CA Y — the vertical position cannot be adjusted when the channel is off or 7
only being used as a trigger source.
TO CHAR IHT SED Cub CHARO — select the internal trigger source by pressing isis or во
Fein
ECUPE UNDER FEMITE CONTREL — the instrument is in Remote mode; all keys except , 22, and e - 9
are disabled,
SEE MOT TROT iT BE — key pressed is enabled only when the instrument is in V vs T mode. 10
СРВ IM DURL SEDE — dual separation can oniy be adjusted if the instrument is in dual horizontal 12
COTE, RACE TH MEET — Control Knob is not assigned to any function. Select the desired variable 13
function by pressing the corresponding key.
* The HRA IE SYMTAM ERROR advisory is not reported via HP-IOB. Refer to Comments section of this instruction.
Model 18980A/B
Adcviso ry
Table 3-7. Advisory Message Description {Page 2 of 2)
Operation
Advisory Message Description
HP-IB
Code
SELECT LERT POEM OR DELAY — to enter AV or AT mode, first press channel 1 or 2} or
then press (88
SINAAL HOT FOLIMIT — no signal is detected within the frequency or amplitude range for autoscope.
is not possible.
COL MEMES HOT PROTESTED — the rear-panel calibration protection switch is set to NOT PROTECTED,
Set it to PROTECTED before using the 1980A/B.
AT ONLY 1H ALTO 2 AFTER LY — AT measurements can only be made when delayed sweep is in
auto-sweep mode.
LOBE HL IOFE EY SL MATE bi — main sweep speed is much slower than delayed; may cause
viewing problems.
LOME MOL TICFE ВУ ЗЫ МЛ ЗЫ — delayed sweep speed is much slower than main; may cause
viewing problems.
THTER TF TEACE OFF SCEEEM — the delay time is greater than ten times the main sweep speed. The inten-
sified marker is beyond the main sweep window.
LAT IMAT MOTE CEE Y — only a AT value can be expressed in terms of frequency. Select AT mode.
PAKET TEST — the Confidence Test, RAM Test, or ROM Checksum found no errors.
FAILED TEST — the Confidence Test, RAM Test or ROM Checksum found an error. The instrument should
be checked by qualified service personnel.
CE, EMMEN PEOTEN TEN — the rear-panel calibration protection switch is set to PROTECTED, calibration
14
15
16
17
18
19
20
21
22
24
25
3-45
Operation Model 1980A/B
Description Autoscope finds the amplitude and period of signal inputs and displays them on the CRT. For many waveforms,
it provides a one keystroke setup of the 1980A /B. Autoscope is optimized for repetitive input waveforms with
the following characteristics:
frequency ........... 0 50 Hz to 100 MHz
amplitude ............... 20 mV to maximum input rating
Autoscope executes the following general procedure:
Preset the conditions listed in table 3-8.
Test signal amplitude at each vertical input. If a signal is found, adjust channel delection factor for
approximately 3 divisions of display. If no signals are found, display advisory and end routine.
Turn off channels with no signal input.
Select signal from lowest numbered channel as trigger source for main and delayed sweeps. Settrigger
level to +0.5 divisions.
Determine period of trigger source and set main sweep speed for approximately 2 cycles of display. Set
delayed sweep speed to 0.1 of main value.
Display input waveforms and return control to front-panel or HP-IB operator,
With selective autoscope, the operator can define which channels are to be autoranged. In addition, selective
autoscope preserves coupling, trigger source, and trigger level selections. Table 3-8 describes which functions
are preset and which are preserved by selective autoscope.
Procedure To execute autoscope, press &iexcl;AE
To execute selective autoscope, press | “Tc.
Program Codes
Execute autoscope:
AS
Execute selective autoscope:
SA
3-46
Model 1980A/B | | | Operatton
Example
Indication
Comments
Related
Sections
Autoscope (Cont'd)
Execute Autoscope.
LOCAL
(keys)
REMOTE AS&lt;CR&gt;&lt;LF&gt;
(codes) identifier - + - L EQS
As the 1980A/B is autoranging deflection factor and sweep speed for each input channel, the signal waveform.
is visible on the CRT. At completion of autoscope, all input signals greater than 10mV are displayed.
Selective autoscope defaults to full autoscope execution if any of the following conditions are detected:
* 1980A/B not in V vs T mode
#
No vertical channels on
* 1 + 2 vertical mode selected
if no input signals are found when autoscope is executed, these additional presets are made:
Trigger source {main and delayed} = channel 1
Main sweep speed = 50.0 usec/div
Delayed sweep speed = 5.00 usec/ div
Vertical deflection factor {all channels) = 2.00 V/div
In remote operation, customized autoscope routines {controller driven} can be implemented using the
— trigger flag. Refer to the “Trigger Flag’ Detailed Operating Instruction.
Reading Values Via HP-iB
Trigger Flag
3-47
Operation
Autoscope (Cont'd)
Model 1980A/8
Table 3-8. Autoscope and Selective Autoscope Preset Conditions
instrument Function
After Autoscope
After Selective Autoscope
Advisory Messages
Bandwidth Limit
Calibrator Level
Control Knob Assignment
Character Generator
Delay
Delta Time
Delta Volts
channel 1
channel 2
Horizontal Position
Horizontal Mode
HP-1B status advisory
Intensity, Characters
intensity, Panel Lamps
Intensity, Trace
Scope Mode
Separation, Dual
Soft Key Menus
Sweep Mode, Delayed
Sweep Mode, Main
Sweep Speed, Delayed
Sweep Speed, Main
Text Display
Trigger, Delayed
source
siope
level, internal
level, external (+10 or—1}
coupling
Trigger, Main
source
slope
level, internal
level, external (+10 or-+1)
level, line
coupling
Trigger View
Vertical Coupling
Vertical Deflection
Vertical Mode
Vertical Position
no change
off
1 Vp-p
main sweep speed
on
0 sec, coarse
off
off
off
0.00 div, coarse
main
no change
70%, coarse
80%, coarse
25%, coarse
V vs T
-3.0 div
no change
auto-sweep
auto
autoranged
autoranged
no change
internal, selected
posttive
0.5 div
0.5 V
AC
internal, selected
positive
0.5 div
0.5 V
0.5 V
AC
off
AC
autoranged
selected
selected
no change
no change
TP Vp-p
main sweep speed
on
OQ sec, coarse
off
off
off
0.00 div, coarse
main
no change
no change
no change
25%, coarse
V vs T
-3.0 div
no change
no change
no change
autoranged
autoranged
no change
. no change
no change
set to main level
refer to comments
no change
no change
no change
no cnange
no change
no change
no change
no change
no change
autoranged
no change
no change
3-48
Model 1980A/8 Operation
Bandwidth Limit
Description Bandwidth limit changes the roll-off of the vertical signal path. It is used to filter signals displayed on the
vertical axis when the 1980A/B is in either Vvs T ar 1 vs 2 mode. Bandwidth limit does not affect internal
trigger signals, |
Vertical Ba ndwidth Characteristics
THT OFF vee eee th tees teem eesti arenes —3 dB at 100 MHz
limiton .......... ee ee ee RR KK —3 dB at 20 MHz
&iexcl;a
Procedure To toggle bandwidth limit on or off, press “um.
Program Codes
Turn bandwidth limit on or off:
BW &lt;state&gt;
state ::= . 0 bandwidth limit off
1 bandwidth limit on
Example Turn on bandwidth limit,
LOCAL sas kan
(keys) {shy
REMOTE | | BWI&lt;CR&gt;&lt;LF&gt;
(codes) identifier I L EOS
state
Indication When bandwidth limit is on, ай is lighted.
Related Scope Mode
Sections Trigger, Delayed Sweep
Trigger, Main Sweep
Vertical Coupling
Vertical Deflection Factor
3-49
Operation Mode! 1980A/8B
Calibrator Level
Description A signal at the front-panel calibrator terminal for use when adjusting probe compensation. The calibrator
signal is also available through a BNC connector on the rear-panei,
The normal calibrator output waveform is a 1 V p-p, square wave. Signal amplitude can be changed via the
HP-IB for calibration checks at other levels.
Calibrator Characteristics
Ргедиепсу 20a KK 1.86 kHz square wave
rise time .......cserescorrer:orereraaZ.. &lt; 5 usec
amplitude ............ce.rerecservesren. 10Vp-p +1%
1 Vp-p +1%
200 т\ р-р +1%
100 mV р-р +1%
20 mV p-p &pound;2%
source impedence
Procedure Calibrator output level can only be changed via the HP-IB,
Program Codes
Select calibrator output level;
CL &lt;level &gt;
level: = 1 20 mV p-p
2 100 mV p-p
3 200 mV p-p
4 1Vpp
5 10V p-p
Exampie Set calibrator output to TO Y p-p:
REMOTE CLH&lt;CR&gt;&lt;LF&gt;
(codes) identifier &quot;| TL COS
level
3-50
Model 1980A/B Operation
ATEO
€?
Calibrator Level (Cont'd)
Comments The calibrator output amplitude is reset to its default value of 1V p-p by the following:
* Power-on
Executing autoscope
* Executing preset (HP-IB &quot;IN&quot;
* ROM Checksum
* RAM Test |
Confidence Test
Calibrator level cannot be stored in the Save/Recall registers nor is it changed when an instrument state is
recalled.
Related Probe Compensation (paragraph 3-50!
Sections
3-51
Operation
Model 1980A/B
Character Generator
Description The character generator displays the CRT readout, advisory messages, and soft key menus. It can also be
Procedure
3-52
programmed via HP-1B for special text displays. This instruction describes the CRT readout, and some general
considerations about using the character generator,
Primary vertical and horizontal parameter values and the trigger source selections are displayed by the CRT
readout. When the Control Knob is assigned to one of these functions, the function name is displayed in
inverse video. Figure 3-18 contains a typical readout display.
BLAS DECILLOL CURE MEASUREMENT SYSTEM
Figure 3-18. The 1980A/8 CRT Readout
The character generator writes all characters during the main and delayed sweeps. In other words, characters
are multiplexed with the traces. Although this technique provides a high quality character e at some
and change main sweep speedto approximately 6 msec/ div with the Control Knob. The’ holes” in the traces
are caused by the character generator. Press E and the “holes” disappear.
The following steps can be taken if the character generator interferes with measurements;
+
Reduce the number of displayed traces to fewest required for making the measurement.
+
Select chop vertical display mode.
*
Turn off the character generator, use only the LED readout for parameter value display.
To toggle the character generator on or off, press $ &gt; =, This key controls all characters displayed except the
advisory messages and the HP-IB status advisory.
Model 1980A/8 — Operation
Example
Comments
Related
Sections
Character Generator (Cont'd)
Program Codes
Toggle the character generator on or off:
SK3
Turn only the CRT readout оп or off:
CG &lt;state &gt;
state::= O CRT readout off
1 CRT readout on
Turn off the CRT readout,
LOCAL nm
{keys) -
REMOTE CGO&lt;CR&gt;&lt;iF&gt;
(codes) x identifier | L N EQS
state —
E
In local or remote operation, if the CRT readout is turned off with 258+ or the HP-1B program code “SK3”, the
following conditions turn the readout on again:
* Power-on
* Executing autoscope
e
Executing selective autoscope
* Calling SP TICA METAL
In local or remote operation, if the CRT readout is turned off with the HP-1B program code “CGO”, calling
CET EUR RL: or cycling the LINE switch turns the readout on again.
If the CRT readout is disabled via HP-IB with the program code “CGO”, 37525 * and the program code “SK3&quot; only
toggle the HP-IB text field on or off,
The state of the character generator can be established via the HP-1B by initializing the 1980A /8 with the &quot;IN&quot;
program code.
Advisory Messages
Control Knob
HP-1B Status Advisory
initialize
intensity, Characters and Lamps
Soft Key Menus
Text Display
3-53
Operation
Mode! 1980A/B
Control Knob
Description The Control Knob is used to change the value of variable function parameters such as sweep speed, deflection
Procedure
3-54
factor, trigger level, and delay. The knob is assigned to a variable function by pressing the corresponding key.
As the knob is rotated, the vaiue is immediately changed.
The Control Knob is a stepping control; either coarse or fine step resolution can be selected. in coarse, the
speed of knob rotation affects the step size so that changes can be quickly made. Fine provides vernier-like
control where step size is set for maximum resolution.
Accidental changes to parameters can be prevented by selecting hold mode. in hold, the knob is not assignedto
any variable function.
The Control Knob can also be assigned to variable functions via the HP-IB. In this special case, the knob is
enabled for local operation, even if the 1980A/B is in remote mode. This allows the selected function to be
adjusted from the front-panel, while all other keys and functions remain in remote.
To assign the Control Knob to a function, press the corresponding variable function key:
trace intensity
panel intensity
character intensity
fch 1 or 2) deflection factor
ich 1 or 2} vertical position
main or diy'd) sweep speed
main ог @у 9) trigger level
horizontal position
dual separation
delay {time or digital}
delay time, numerical
Toggle Control Knob between fine and coarse step resolution by pressing ;
To select hold mode, press | . Exit hold by assigning the Control Knob to a variable function.
Model 19804/8
&laquo;ШЕЕ&raquo; Program Codes
Operation
Control Knob (Cont'd)
Assign the Control Knob and set step resolution:
RC &lt;code&gt;! ,&lt;step&gt;]
code ::=
step::=
по!
channel 1 deflection factor
channel 2 deflection factor
main sweep speed
delayed sweep speed
channel 1 position
channel 2 position
channel 1 position
o ~N HO GR WN we o
channel 2 position
{D
dual separation
—t
o
horizontal position
ar
эй
main trigger level
sh
N
delayed trigger level
delay
— —
&gt; W
delay
ad
QT
deiay
—
&copy;
trace intensity
—
“J
character intensity
—
&copy;
panel intensity
0 coarse
1 fine
To assign the Control Knob to delay in the numerical entry mode, first send the program code: KY7,41 — then
send RC13,0 or RC13,1 to select step resolution. Refer to the “Key” Detailed Operating Instruction for more
information about the &quot;KY&quot; command.
The program codes for assigning the Control Knob to AT and AV are described inthe &quot;Delta Time’ and &quot;Delta
Volts” Detailed Operating Instructions, respectively.
Example Assign Control Knob to channel 1 deflection factor, coarse step resolution.
LOCAL ; &Ccedil;
| (сб 2) |
(keys) &gt;
REMOTE RC7,O&lt;CR&gt;&lt;LF&gt;
(codes) identifier I | L EOS
| assignment code step resolution
3-55
Operation
indication
Comments
Related
Sections
3-b6
Mode! 1980A/8
Control Knob (Cont'd)
Control Knob assignment is indicated by lighting the corresponding variable function key. Also, the LED
readout displays the parameter value of the function.
The LED readout displays Hald to indicate hold mode is selected. i the Control Knob is rotated while in
hold, the advisory CORTE КНОВ TH HOLT is displayed.
When the Control Knob is assigned to a variable function displayed by the CRT readout, the function name is
displayed in inverse video.
lights to indicate that fine is selected.
The Control Knob defaults to hold mode when the 1980A/B makes the remote-to-iocal transition.
Executing autoscope or selective autoscope assigns the Control Knob to main sweep speed. ifthe 1980A/Bis
in remote mode, the Control Knob is enabled as though the program code RC3,0 was sent.
Executing preset (MP-IB “IN”} in remote or local mode assigns the Control Knob to trace intensity. If the
1980A/B is in remote mode, the Control Knob is enabled as though the program code RC16,0 was sent.
Control Knob step resolution for a variable function may also be changed by the following:
&yen; Executing auioscope
* Executing selective autoscope
* Executing presef (HP-IB IN”)
* Recalling settings from Save/Recall registers
Delay
Delta Time
Delta Volts
Horizontal Position
Intensity, Character and Lamp
Intensiy, Trace
Reading Values Via HP-1B
Separation, Dual
Sweep Mode, Delayed
Sweep Mode, Main
Sweep Speed, Delayed
Sweep Speed, Main
Trigger, Delayed
Trigger, Main
Model 1980A/B Operation
Delay
Description The delay from the main sweep trigger until the start of the delayed sweep is expressed in terms of time or
trigger events, depending upon which delayed sweep mode is in effect, This instruction explains how to set the
delay factor for each of the delayed modes.
There are two basic modes for delay time entry from the front-panel of the 1980A/B. Normally the delay time
parameter step resolution is determined by the sweep speed of the displayed timebases. This is usuaily the
best mode of entry when making measurements on waveforms displayed on screen because the step
resolution is proportioned to the displayed waveform. A second basis for delay time step resolution is provided
by numerical entry mode. This mode allows specific delay values to be quickly entered. Table 3-9 describes the
step resolutions available for delay time entry.
Delay Characteristics
delay time
range ......e_erceraeo. O to 9.999 999 999 9 sec
resolution
front-panel .......... 5 digits, 100 psec minimum
{refer to table 3-9)
HP-IB iia, 100 psec
ассыгасу .....rresenevo delay time accuracy
depends upon delayed sweep
speed value and delay time
as described in table 3-10.
delay jitter ............ 0.002% of delay time
evenis delay
range ....e...e.reresceo 0 to 99 899 999 events
resolution ............. 1 event
maximum rep rate ..... 15 MHz with 50% duty cycle
Table 3-9. Delay Time Step Resolution ffront-panel)
Entry Horizontal Coarse Step Fine Step
Mode Mode Resolution Resolution
Numerical all modes Second most sig. Least sig. digit
- digit
Normal intensified 0.03 X main 0.0001 X main
sweep speed sweep speed
Norma delayed 0.03 X delayed 0.0001 X delayed
sweep speed sweep speed
Normal dual 0.03 X main 0.03 X delayed
sweep speed sweep speed
3-57
Operation
Procedure
3-58
Model 1980A/8
Delay (Cont'd)
Table 3-10, Delay Time Accuracy*
Delay Delayed Sweep Speed Value
Value
5 to 9.99 nsec/ div &gt; 10 nsec/ div
&lt;200 usec +12 nsec + 0.1% of + (2 nsec + 0.1% delay
reading) vatue + 10% of sweep speed
value)
2200 usec +(0.05% of delay value) + (0.05% of delay value + 10%
of sweep speed value)
* Guaranteed within 60 minutes after execution of Delay Time Self-cal at constant ambient temperature.
&amp; and rotate the Control Knob.
To enter a delay value, press
- . . |
To enter delay time values using the numerical entry mode, press | |
Press #8 to select step resolution for delay time (numerical or normal entry mode), or digital delay entries.
RO
Zero the delay value by pressing | seg
Program Codes
Enter delay time value when the delayed sweep is in auto or triggered sweep mode:
DY &lt;value &gt;
value i= exponential
|+]{d.ddidd.d|ddd}[d...}{e|E}{-{d]d}+0}
100 psec to 9.999 999 999 9 sec
least significant nonzero digit must be = 100 psec
most significant digit must be &lt; 9sec
Enter events delay value when delayed sweep is in digital delay mode:
DD &lt;vaiue &gt;
value::= integer
d..Id
I 7 digits maximum
O to 99 999 999 events
Model 1980A/B Operation
Example
Indication
Comments
Related
Sections
Delay (Cont'd)
Enter delay time value of 20 usec using numeric entry mode.
LOCAL
(keys)
REMOTE DY20.0e-06 &lt;CR&gt;&lt;LF&gt;
(codes) identifier — 1 L EQS
delay value
When the Control Knob is assigned to delay, is lighted and the delay value is displayed in the LED
readout, Delay time values are displayed by the readout as exponential numbers, digital delay values are
displayed as integers,
His a syntax error if a time or events delay value is entered via HP-IB when the delayed sweep is not in the
corresponding delay mode. This error, however, is not trapped. Always ensure the proper delay mode is
selected before entering delay values. Refer to the “Sweep Mode, Delayed’ Detailed Operating instruction for
more information about selecting delayed sweep mode.
If a delay time value is entered via HP-IB when numerical entry mode with coarse step resolution is selected,
the T980A/B only accepts two digits of the delay time value. If a delay time value with more than two digits is
entered, the value is truncated to two digits. To avoid this condition, ensure the delay time function is either in
normal entry mode or numerical entry mode, fine step resolution.
In triggered or digital delay delayed sweep modes, the setup time of the delayed trigger circuit must be taken
into consideration if delayed sweep is {o be triggered on the same pulse edge as main. Delayed trigger events
cannot be detected until approximately 70 nsec after main trigger.
Control Knob
Delay Time Self-cal {paragraph 3-49)
Delta Time
Sweep Mode, Delayed
Sweep Mode, Main
Trigger Fiag
3-59
Operation
Model 1980A/B
Delta Time
Description AT provides a convenient means for making time interval or frequency measurements from the front-panel. It
Procedure
HP IR
3-60
is an extension of the delay time function. AT allows a zero time reference to be set anywhere within the delay
time range. Then as delay time is incremented or decremented, the 1980A /B displays a direct readout of the
time interval between the zero reference and the present delay value.
Delta Time Characteristics
range ...........eeeeeerreno O sec — Tzero to 9.999 999 9 sec — Tzero
resolution
font-panel ............e me... 5 digits, 100 psec minimum
refer to table 3-91
HP-IB Nerea. 100 psec
асснгасу ........eesdrira ea. delta time accuracy is the same as delay time, it depends upon
delayed sweep speed value and delay time as described in
table 3-10.
delay jitter ..........._ ....... 0.002% of delay time
To select AT mode, press. &Eacute; while the Control Knob is assigned to delay time. if numerical entry mode is
selected, numerical AT mode is selected with &sect;
Select Control Knob step resolution with
AT AT
To toggie the AT display between units of time and units of frequency, press 555.
AT mode can be turned off by pressing E a while the Control Knob is assigned to AT.
Program Codes
Turn AT mode on or off, set the zero reference point, and assign the Control Knob to AT:
DZ &lt; mode &gt;
mode: = O AT off
1 AT on, zeroed, Control Knob assigned
Select Control Knob resolution:
RC13, &lt;step&gt;
step::= O coarse
1 fine
Model 19804/B Operation
Delta Time (Cont'd)
Example Turn on AT and set the zero reference point at a delay value of 20 usec from main sweep trigger.
LOBAL &quot;00-3
{keys}
REMOTE DY20.0e-6;DZ1 &lt;CR&gt;&lt;LF&gt;
{codes) identifier —Г E EOS
delay value mode
identifier
Indication When AT mode is on, the LED and CRT readouts display the AT value instead of delay. The LED readout displays
&copy; 0-9lwhen AT is zeroed.
Comments For specified accuracy, the Delay Time Self-cal should be executed within one hour before AT measurements
are made.
Although the &quot;DZ&quot; command assigns the Control Knob to AT, it does not select numerical or normal entry
mode. The last selected delay time entry mode determines the AT entry mode,
if sweep speeds, sweep modes, trigger levels, or main trigger conditions are changed {or the corresponding
keys pressed), AT mode is turned off.
When AT is first turned on from the front-panel or via the HP-IB, AT is expressed in terms of time.
Related Control Knob
Sections Delay
Delay Time Self-cat (paragraph 3-49;
Horizontal Mode
Reading Values Via HP-IB
Sweep Mode, Delayed
Sweep Speed, Delayed
Sweep Speed, Main
Trigger Fiag
3-61
Operation Modei 1980A/8
Delta Volts
Description AV provides a convenient means of measuring voltage using the Control Knob. AVis a special operating mode
of the vertical position variable function in which channel deflection factor is muitiplied by change in vertical
position. &Agrave; zero vertical reference point can be set anywhere within the vertical position range. Then, as
vertical position is incremented or decremented, the 1980A /B displays a direct reading of the voltage interval
between the zero reference and the present trace position. AV measurements can be made with both channel
1 and 2 in either V vs T or 1 vs 2 scope modes.
Delta Volts Characteristics {Channel 1 or 2)
range NA A +15 times the channel deflection factor
resolution Le ee 0.02 times channel deflection factor
ACCUTACY ......coororooracrao. ere rre. + 4% for a position change &lt; 10 div
Procedure Select AV Mode for a given channel and set the zero reference point by pressing &copy; 2 a while the Control Knobs
assigned to that channel's vertical position variable function.
While the Control Knob is assigned to channel 1 or 2 AV, pressing | UU turns off AV mode for that channel.
Select step resolution by pressing
EEE Program Codes
Turn on AV mode for channel 1 or 2 and assign Control Knob:
DV &lt;channel&gt;, &lt; state &gt;
channel: = 1 channel 1
2 channel 2
state! = О AV off
1 AV on,zeroed, Control Knob assigned
Select Control Knob step resolution:
RC &lt;channel &gt;| &lt; step &gt;|
channel. = 5 channel 1
6 channel 2
step: = O coarse
1 fine
3-62
Mode! 1980A/B Operation
Delta Volts (Cont'd)
Example Turn on channel 1 AV.
LOCAL Fans —5]
(keys) —
REMOTE DVi,1 &lt;CR&gt;&lt;LE&gt;
(codes) identifier — | | TU eos
channel state
indication = When AV is on for a channel, the LED and CRT readouts display the AV value instead of deflection factor. The
LED readout displays |“ 000 -Elwhen AV is zeroed.
Comments If channel deflection factor is changed after AV mode is selected, AV is turned off.
Related Control Knob
Sections Reading Values Via HP-1B
Scope Mode
Vertical Mode
Vertical Deflection Factor
Vertical Position
3-63
Operation
Description
Indication
Comments
Related
Sections
3-64
Model 1980A/85
Error Messages
If the 19BOA/B detects an internal hardware error, an error message is displayed in the LED readout. The error
message is primarily meant as a diagnostic aid; it indicates a failure that requires the attention of qualified
service personnei. Table 3-11 lists the error conditions that can be detected.
The instrument can be programmed to send the Require Service message when an error condition is detected.
The condition can also be read by the system controller, refer to the “Instrument Status” Detailed Operating
Instruction, Table 3-11 includes the HP-IB codes for the various error conditions.
When an error is detected, the LED readout displays an error message, Such as: Err -34]
If an error occurs duringthe balance seif-cal, RAM test, ROM checksum, or Confidence Test, the error message
is displayed briefly in the LED readout. Then the procedure terminates and displays FL LED TE STonthe CRT.
if a cal factor or horizontal word output error occurs, the error message is displayed inthe LED readout until any
key except ‘saw’ is pressed.
The HP-IB code “25” is sent for many of the error conditions. It is the code for the advisory FHILED TE,
which is displayed on the CRT when an error is detected during any of the procedures described in paragraph
3-44, Operator's Checks.
instrument Status
Remote Operation (paragraph 3-21)
Operator's Checks {paragraph 3-44)
Power-on Sequence and Default Conditions
Service Request Condition
Model 1980A/8 Operation
Error Messages (Cont'd)
Table 3-11. Hardware Error Codes
LED code HP-18 Code ‚ Error Description
Err 9] 25 &quot;ROMO Failed checksum
Е гг E 25 ROM 2 Failed checksum
Err ui 25 ROM 4 Failed checksum
Err E 25 ROM 6 Failed checksum
Err Bl 25 ROM 8 Failed checksum
Ere = 10 25 ROM 10 Failed checksum
Err - I 25 ROM 12 Failed checksum
Ere IM 25 ROM 14 Failed checksum
JE - 16 25 ROM 16 Failed checksum
25 ROM 18 Failed checksum
25 ROM 20 Failed checksum
25 ROM 22 — Failed checksum
Err о-в Ч 25 ROM 24 Failed checksum
Err - eb 25 ROM 26 Failed checksum
Ere 7286 25 ROM 28 Failed checksum
Err -3d] 25 ROM 30 Failed checksum
Err 31 25 Confidence-test vertical channel error
E rr -38] 25 Confidence-test horizontal range error
Err -33] 25 Confidence-test 10 V signal not found
25 Confidence-test 1 V signal not found
25 Confidence-test 0.1 V signal not found
bre 756 25. Confidence-test 0.02 V signal not found
66 1 980A/B cal factor checksum error
77 Channel! 1 failed autobalance
78 Channel 2 failed autobalance
Err _-B0 25 Scratch RAM (U16) failed
err Bl 25 Nonvolatile RAM (U42, 43) failed
Err 78€ 25 Character RAM (U32, 33) failed
Err 755 25 Feature RAM (U34, 36) failed
25 Save/Recall RAM (U35, 37) failed
Erro el 38 Horizontal Word output failed
3-65
Operation
Description
Procedure
GE
3-66
Model 1980A/8
Horizontal Mode
in V vs T scope made, four horizontal modes are avaliabie. The modes are: Main, main intensified, delayed, and
dual, Main displays vertical inputs with respect to the main timebase, Main intensified displays the vertical
inputs with respect to the main timebase, and intensifies the portion of the trace that occurs during delayed
sweep. Delayed displays the vertical inputs with respect to the delayed timebase, Dual displays both the main
intensified and the delayed sweep traces using the selected vertical mode {alternate ог спор).
In main mode, only the main timebase is on. The delayed timebase and trigger controls are not enabled.
Irn main intensified, delayed, and dual modes the main and delayed timebases are on. The main and delayed
sweeps are dependent on each other in two ways:
* Delayed sweep cannot begin until main sweep has been triggered.
x
Main sweep cannot repeat until delayed sweep is completed.
Uniike traditional scopes, the 1980A /B allows main and delayed sweep speeds to be set independently. Also,
the delay until start of delayed sweep is totally independent of the main sweep speed. This allows considerable
versatility in waveform measurement and viewing. For exampie, the first and last events of a block of serial
data can be displayed simultaneousiy at any sweep speed by triggering main at the first event and delaying
delayed sweep until the last event,
For more information about using the main and delaved sweeps, refer to the sections listed at the end of this
instruction.
Select horizontal mode with the following keys: -
NTRA :
fm main sweep
UNTEN. ; ; fi
rene main sweep intensified by delayed
rio delayed sweep
DE dual sweep
Program codes
Select horizontal mode:
HM &lt; mode &gt;
mode::= TT main
2 main intensified
3 delayed
4 dual
Model 1980A/B
Example
Indication
Related
Sections
Horizontal Mode (Cont'd)
Select dual sweep horizontal mode.
Operation
LOCAL Te
REMOTE HMA&lt;CR&gt;&lt;LF&gt;
(codes) identifier — TL EOS
mode
Horizontal mode is indicated by lighting the corresponding key.
Delay
Deita Time
Scope Mode
Sweep Mode, Delayed
Sweep Mode, Main
Sweep Speed, Delayed
Sweep Speed, Main
Trigger, Delayed
Trigger, Main
3-67
Operation Model 1980A/B
Horizontal! Position
Description In V vs T mode, the horizontal position of the displayed waveforms can be adjusted for viewing convenience.
When horizontal position is zero, the sweeps begin at the leftmost vertical graticule line.
Horizontal Position Characteristics
range iit 176,00 div
resolution .....e...e errores aaron... 0.02 div
Procedure = Tochange horizontal position, press and adiust with Control Knob. Resolution is the same in coarse
and fine. In coarse, step size is a function of speed of rotation of the Control Knob.
ar Program Codes
Enter horizontal position value:
HP &lt;value&gt;
value: = decimal
i+j-1&lt;SP&gt;][did.did]
-6.00 to +6.00 div
value must be multiple of 0.02 div
Example Change horizontal position setting to +2 44.
LOCAL
(keys)
REMOTE HP+244&lt;CR&gt;&lt;LF&gt;
(codes) identifier fos
value
Indication When Control Knob is assigned to horizontal position,
in the LED readout,
is lighted and the position value is displayed
Related Control Knob
Sections Reading Values Via HP-iB
3-68
Model 1980A/B | Operation
TIT
B Address
Description The HP-IB addressing mode and address can be displayed and changed from the front-panel using soft key
Procedure
Exampie
Indication
Comments
Related
Sections
Menus.
lee
; LME MEE HTA to step the 1980A/B through the three addressing modes.
When the 1980A/ B is set to addressable (EEE &lt;dd&gt; ) mode, the address value can be changed by
HA DEERE MENT
pressing 218% INCEEMENT ora
Press fev to return the soft keys to their normal functions.
Check the HP-IB addressing mode and address.
LOCAL a
(keys)
then exit the menu with a
The following information is displayed in the MF ~ TF HEIRESS MOTE menu to indicate the current addressing
mode and address:
MIHIREL EE &lt;dd&gt; - indicates instrument is addressable. &lt;dd&gt; is the instrument talk and listen address.
LISTEN OMLY - indicates listen-oniy mode selected.
THLE Li. Y - indicates talk-only mode is selected,
When listen-only mode is selected, the HP-IB status advisory displays HF IE: L.
Calling the HPA TE ATTRESS MOTE menu resets all HP-IB parameters, except the address value and
addressing mode, to the states described in the &quot;Power-on Default Conditions” Detailed Operating
Instruction.
HP-IB Status Advisory
Power-on Sequence and Defauit Conditions
Remote Operation (paragraph 3-21)
3-69
Operation Model 1980A/B
Status Advisory
Description The HP-IB status advisory displays basic HP-IB status information onthe CRT. The advisory indicates when the
instrument is in remote mode; is addressed to tatk or listen; or if it has issued the Require Service message. If
none of these conditions are in effect, the advisory is not displayed. The status advisory can be disabled via the
HP-IB.
Table 3-12. Symbols Used in HP-IB Status Advisory
Advisory HP-1B Status Indication
Symbol
К Switched to remote mode
A Addressed to listen
Е Addressed to talk
Issued the Require Service message
&ntilde;
В
#
$
=
$
E
#
E
Е:
=
28
Program Codes
SCOPE MEASUREMENT SYS
Figure 3-18. The HP-IB Status Advisory
Enable or disable the HP-IB status advisory:
BA &lt;state &gt;
state ..—= O status advisory off
1 status advisory on
3-70
Model 1980A/8 Operation
HP-IB Status Advisory (Cont'd)
Example Turn off the status advisory.
REMOTE BAO&lt;CR&gt;&lt;LF&gt;
(codes) identifier ———- L EOS
state
Comments In listen-only or talk-only addressing modes, status advisory is enabled. HF -iti: |. апа ни еп: &copy; are
displayed, respectively,
Related Character Generator
Sections HP-IB Address
Intensity, Characters and Lamps
3-71
Operation
Model 1980A/B
HP-1B Syntax Errors
Description When an error in HP-IB message syntax is detected by the 1980A/B, it aborts the execution of the Data
Indication
Comments
Related
Sections
3-72
message. Program codes up to the error are executed, those following the error are ignored. For more specific
information on message execution, refer to Receiving the Data Message, paragraph 3-30.
The instrument can be programmed to issue the Require Service message in response to syntax errors. The
type of error can then be determined by reading the error code via the HP-IB. Table 3-13 lists the types of syntax
errors the instrument detects, and their corresponding HP-18 codes. The “Service Request Condition” and
“Instrument Status” Detailed Operating Instructions explain how to detect errors and read their codes.
Table 3-13. HP-IB Syntax Errors
HP-1B Code Syntax Error Description
Parameter out of range
Command not recognized
Missing terminator
Unexpected character
Input buffer overfiow
Data output not specified
Si WN
A syntax error causes HF -16: ENTER ERETIT advisory to be displayed on the CRT if advisories are enabled.
If the 1980A/B is addressed to talk before the output data is specified. it outputs ASCII character “E” to
compiete the bus transaction. This syntax error does not cause HF ~ 1k ТРЛН НА hie = advisory, anddoes not
cause the Require Service message to be sent. However, if the status qualifier for HP-13 syntax is read, the
1980A/B outputs error code 6.
Advisory Messages
Instrument Status
Reading Values Via HP-iB
Remote Operation (paragraph 3-21)
Service Request Condition
Mode! 1980A/B Operation
Initialize
Description The 1980A/B can be initialized to a defined state using the soft keys or via the HP-IB. Table 3-14 contains a
complete description of the initialized state.
Procedure To initialize the instrument, press Sy
&laquo;НЕЕ&raquo; Program Codes
Execute initialize:
IN
Exampie Initialize the 1980A/B.
LOCAL
{keys}
REMOTE IN&lt;CH&gt;&lt;LF&gt;
{codes} identifier mad т EOS
indication The instrument changes to the setup described in table 3-14.
Comments Initializing via the HP-IB turns off soft key menus. Therefore, it provides a known “starting point” for selecting
menu functions via HP-1B.
Related Soft Key Menus
Sections
3-73
Operation
Initialize (Cont'd)
Table 3-14. 1980A/8 Initialized State
Model 1980A/8
instrument Function
initialized State
Advisory Messages
Bandwidth Limit
Calibrator Level
Character Generator
Control Knob Assignment
Delay
Delta Time
Deita Volts
channei 1
channel 2
Horizontal Position
Horizontal Mode
HP-IB Status Advisory
intensity, Characters
intensity, Lamps
Intensity, Trace
Scope Mode
Separation, Dual
Soft Key Menus
Sweep Mode, Delayed
Sweep Mode, Main
Sweep Speed, Delayed
Sweep Speed, Main
Text Display
Trigger, Delayed
source
slope
level, external +10
level, internal
coupling
Trigger, Main
source
siope
level, externa! + 10
level, internal
coupling
Trigger View
Vertical Coupling
channel 1
channel 2
Vertical Deflection
channel 1
channel 2
Vertical Mode
Vertical Position
channel 1
channe! 2
no change
off
| Vp-p
on
trace intensity
0.0 nsec, coarse
off
off
off
0.00 div, coarse
main-intensified
no change
70%, coarse
30%, coarse
25%, coarse
\ ме Т
- 3.00 div, coarse
off
auto-sweep
auto
10.0 usec/div, fine
100 usec/div, coarse
off
channel 1
positive
1 Y, coarse
1.00 div, coarse
AC
channel 1
positive
1 V, coarse
1.00 div, coarse
AC
off
AC
AC
2.00 V/div, fine
2.00 V/div, fine
channel 1 and 2 on, auto-alternate display
0.00 div, coarse
- 2.00 div, coarse
3-74
Mode! 1980A/8B | | Operation
instrument Status CEE
Description The 1980A/B can issue a Require Service message on the HP-IB under one or more operator selectable
Procedure
conditions. Whenever the enabled condition occurs, it sets both the bit corresponding to the condition andthe
RQS bit {bit 6} in the Status Byte, The bits set in the Status Byte are not cleared unless the Status Byte is read
{by serial polling}, or the LINE switch is cycled.
If more than one enabled condition occurs before the Status Byte is read, the 1980A/B queues them, eachina
separate byte, inthe order inwhich they happened. Up to 8 conditions (Status Bytes) can be stacked inthis way.
The stack must be read, byte by byte, using successive serial polls. Each byte contains an RQS bit so that the
Instrument will issue and reissue the Request Service message until the entire stack is cleared.
For applications where the ROS interrupt is inconvenient or unnecessary, the Require Service message can he
inhibited. In this mode, a single Status Byte register in the 1280A/B traps the occurance of all of the 7
conditions. Although the instrument will not issue the Require Service message, the Status Byte may stiii be
read by ser&iacute;al polling.
Supplemental information about status conditions that occur is contained in the status qualifier registers.
These can be read to determine which error occurred, which key was pressed, etc. The qualifier registers can
be read without reading the Status Byte message if desired.
The instrument status registers are not accessible from the front-panel.
The Status Byte is read via the serial poll sequence described in figures 3-14 and 3-15.
Program Codes
To read the status qualifiers, select the data to be output by the 1980A/B:
OQ&lt;code&gt;
code ::= HP-13 syntax error code
last key code
trigger flag state
advisory or error code
internai option code
&copy;) 1 BW N=
plug-in option code
Then, address the instrument to talk and read the data,
3-75
Operation
Example
Indication
Comments
Related
Sections
3-76
Instrument Status (Cont'd)
Command the 1980A/B to output trigger flag state.
Mode! 1980A/B
REMOTE
(codes)
identifier
QQ3&lt;CR&gt;&lt;LF&gt;
=
qualifier code
EOS
if an enabled Service Request condition occurs, the HP-IB status advisory displays
message is cleared.
: until the Status Byte
The status qualifier registers contain information pertaining only to the last occurrance of the corresponding
condition.
Advisory Messages
Error Messages
HP-1B Status Advisory
НР-1В Syntax Errors
Key
Service Request Condition
Soft Key Menus
Trigger Flag
Model 1980A/8 Operation
Description
Procedure
GED
Example
Comments
Related
Sections
Intensity, Characters and Lamps
The brightness of the characters displayed on the CRT, and of the panel lamps {including the LED readout) can
be adjusted from the front-panel or via the HP-IB. The intensities of both the characters and lamps are
expressed as % of fuit intensity.
To change the brightness of the character display, press and adjust with the Control Knob.
To change the brightness of the pane! lamps and the LED readout, press g
Control Knob.
and adjust intensity with the
Program Codes
Enter character and ">

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