Tektronix 2205 User manual

TEK 070-6717-00
PRODUCT GROUP 46
2205 OSCILLOSCOPE
OPERATOR’S MANUAL
First Printing October 1987 Tektro ix-
COMMITTED TO EXCELLENCE

Copyright © 1987 Tektro ix, I c. All rights reserved. Co te ts
of this publicatio may ot be reproduced i a y form without
the writte permissio of Tektro ix, I c.
Products of Tektro ix, I c. a d its subsidiaries are covered by
U.S. a d foreig pate ts issued a d pe di g.
I formatio i this publicatio supersedes that i all previously
published material. Specificatio a d price cha ge privileges re
served. TEKTRONIX, TEK, PLOT 10, TEKTEST, SCOPE-MOBILE,
a d are registered trademarks. For further i formatio ,
co tact Tektro ix, I c. Corporate Offices, P.O. Box 500, Beaver
to , OR 97077. Pho e: [phone]; TWX: [phone];
TLX: 151754. Subsidiaries a d distributors worldwide.
Pri ted i Ho g Ko g.
INSTRUMENT SERIAL NUMBERS
Each i strume t has a serial umber o a pa el i sert, tag, or
stamped o the chassis. The first umber or letter desig ates
the cou try of ma ufacture. The last five digits of the serial
umber are assig ed seque tially a d are u ique to each i stru
me t. Those ma ufactured i the U ited States have six u ique
digits.
B000000 Tektro ix, I c., Beaverto , Orego , U.S.A.
HK00001 Ho g Ko g
100000 Tektro ix Guer sey, Ltd., Cha el Isla ds
200000 Tektro ix U ited Ki gdom, Ltd., Lo do
300000 So y/Tektro ix, Japa
700000 Tektro ix Holla d, NV, Heere vee ,
The Netherla ds

NOTICE to the user/operator:
The Germa Postal Service requires that Systems assembled by the
operator/user of this i strume t must also comply with Postal
Regulatio , Vfg. 1046/1984, Par. 2, Sect. 1.
HINWEIS fur de Be utzer/Betreiber:
Die vom Betreiber zusamme gestellte A lage, i erhalb derer dies
Gerat ei gesetzt wird, mud ebe falls de Voraussetzu ge ach Par. 2,
Ziff. 1 der Vfg. 1046/1984 ge uge .
NOTICE to the user/operator:
The Germa Postal Service requires that this equipme t, whe used i a
test setup, may o ly be operated if the requireme ts of Postal
Regulatio , Vfg. 1046/1984, Par. 2, Sect. 1.7.1 are complied with.
HINWEIS flir de Be utzer/Betreiber:
Dies Gerat darf i Meflaufbaute ur betriebe werde , we die
Voraussetzu ge des Par. 2, Ziff. 1.7.1 der Vfg. 1046/1984 ei gehalte
werde .

Certificate of the Ma ufacturer/lmporter
We hereby certify that the 2205 oscilloscope ____________________
___________________ AND ALL INSTALLED OPTIONS __________________
complies with the RF I terfere ce Suppressio requireme ts of
Amtsbl.-Vfg 1046/1984.
The Germa Postal Service was otified that the equipme t is bei g
marketed.
The Germa Postal Service has the right to re-test the series a d to
verify that it complies.
TEKTRONIX
Beschei igu g des Herstellers/lmporteurs
Hiermit wird beschei igt, da3 der/die/das 2205 oscilloscope _______
AND ALL INSTALLED OPTIONS
i Uberei stimmu g mit de Bestimmu ge der Amtsblatt-Verfugu g
1046/1984 fu ke tstort ist.
Der Deutsche Bu despost wurde das I verkehrbri ge dieses Gerates
a gezeigt u d die Berechtigu g zur Uberprufu g der Serie auf Ei halte
der Bestimmu ge ei geraumt.
TEKTRONIX

CONTENTS
Page
Operator’s Safety Sum m ary ............................................................ iv
The 2205 Oscilloscope ....................................................................vii
SECTION 1-PREPARATION FOR USE
Safety ........................................................................................... .. 1-1
Li e Voltage Selectio ................................................................ 1-1
Li e Fuse ....................................................................................... 1-4
Power C ord....................................................................... 1-4
I strume t Cooli g ...................................... 1-4
I itial Start-Up ........................................................................... 1-5
SECTION 2-OPERATION
Fro t Pa el Orga izatio ............................................................ 2-1
Co trols, Co ectors, a d I dicators . . ................... .. 2-1
Lear i g the Co trols ........................................................... 2-6
Display Co trols ................................................... 2-8
Vertical Co trols.......................................... 2-8
I put Coupli g............................................................................ 2-8
Cha el Selectio . .................................................................. 2-9
Add a d I vert .................... 2-9
Chop or A lt? .............................................................................. 2-9
Horizo tal Co trols ......... .. ......................................................... 2-10
Sweep Speed Selectio ....................................................... 2-10
Mag ifyi g Waveform Details . ............................................ 2-10
2205 Operator's

SECTION 2-OPERATION (CONTINUED)
Trigger Co trols ......................................................................... 2-10
Which Mode to U s e .............................................................. 2-11
Source....................................................................................... 2-12
Slope......................................................................................... 2-12
Level ......................................................................................... 2-12
Co ecti g Sig als..................................................................... 2-12
Waveform Fidelity a d Probe Grou ds ............................. 2-13
Probe Compe satio ............................................................ 2-13
Probe Ha dli g....................................................................... 2-13
Coaxial Cables ....................................................................... 2-14
SECTION 3-APPLICATIONS
Amplitude Measureme ts .......................................................... 3-1
Peak-to-peak Voltage............................................................ 3-1
I sta ta eous Voltage ............................................................ 3-3
Algebraic Additio ................................................................... 3-5
Commo -mode Rejectio ..................................................... 3-6
Amplitude Compariso (Ratio) ............................................. 3-7
Time Measureme ts ................................................................... 3-8
Time Duratio ............................................................................ 3-8
Period a d Freque cy ......... ................................................ 3-10
Rise Time .......................... 3-10
Time Differe ce Betwee Pulses o
Time-Related Sig als........................................................ 3-12
Phase Differe ce ................................................................... 3-14
Televisio Displays..................................................................... 3-17
TV Field Sig als ........................................................... 3-17
TV Li e Sig als....................................................................... 3-18
Z-Modulatio .............................................................................. 3-18
SECTION 4-CHECKS AND ADJUSTMENTS
Trace Rotatio .............................................................................. 4-1
Probe Compe satio .................................................................. 4-1
jj 2205 Operator's

SECTION 5-PERFORMANCE CHARACTERISTICS
SECTION 6-OPTIONS AND ACCESSORIES
Sta dard Accessories ................................................................ 6-1
Optio s ........................................................................................... 6-1
Optio al Accessories................................................................... 6-4
APPENDIX A - Mag ified Sweep Speeds
APPENDIX B - Repackagi g for Shipme t
APPENDIX C - Glossary
2205 Operator's iii

Operator's Safety Summary
OPERATOR’S SAFETY SUMMARY
The ge eral safety i formatio i this summary is for both oper
ati g a d servici g perso el. Specific war i gs a d cautio s —
fou d throughout the ma ual where they apply — do ot appear
i this summary.
Terms
I This Ma ual
CAUTION stateme ts ide tify co ditio s or practices that
could result i damage to the equipme t or the property.
W ARNING stateme ts ide tify co ditio s or practices that
could result i perso al i jury or loss of life.
As Marked o Equipme t
CAUTION i dicates a perso al-i jury hazard that is ot im
mediately accessible as o e reads the marki gs, or a
hazard to property, i cludi g the equipme t itself.
DANGER i dicates a perso al-i jury hazard that is
immediately accessible as o e reads the marki g.
Symbols
I This Ma ual
This symbol i dicates applicable cautio ary or other
i formatio . For maximum i put voltage see
Table 5-1.
IV 2205 Operator’s

Operator’s Safety Summary
As Marked o Equipme t
f
A
DANGER—High voltage.
Protective grou d (earth) termi al,
ATTENTION—Refer to ma ual.
Power Source
This product is i te ded to operate from a power source that
does ot apply more tha 250 V rms betwee the supply co 
ductors or betwee either supply co ductor a d grou d. A pro
tective grou d co ectio , by way of the grou di g co ductor i
the power cord, is esse tial for safe operatio .
Grou di g the Product
This product is grou ded through the grou di g co ductor of the
power cord. To avoid electrical shock, plug the power cord i to
a properly wired receptacle before maki g a y co ectio s to
the product i put or output termi als. A protective grou d co 
ectio , by way of the grou di g co ductor i the power cord, is
esse tial for safe operatio ..
Da ger Arisi g From Loss of Grou d
Upo loss of the protective-grou d co ectio , all accessible
co ductive parts, i cludi g k obs a d co trols that may appear
to be i sulati g, ca re der a electric shock.
Use the Proper Power Cord
Use o ly the power cord a d co ector specified for your
product.
The power cord must be i good co ditio .
2205 Operator's V

Operator's Safety Summary
Read Sectio 1 for power-cord a d co ector i formatio .
Use the Proper Fuse
To avoid fire hazard, use o ly a fuse of the correct type, volt
age rati g a d curre t rati g as specified o the back of your
product a d i Table 6-1.
Do Not Operate i a Explosive Atmosphere
To avoid explosio , do ot operate this product i a explosive
atmosphere.
Do Not Remove Covers or Pa els
To avoid perso al i jury, do ot remove the product covers or
pa els. Do ot operate the product without the covers a d
pa els properly i stalled.
VI 2205 Operator's

Operator's Safety Summary
THE 2205 OSCILLOSCOPE
The TEKTRONIX 2205 Oscilloscope is a rugged, lightweight,
dual-cha el, 20 MHz i strume t that features a bright, sharply
defi ed trace o a 80 by 100 mm cathode-ray tube (crt).
Its low- oise vertical system supplies calibrated deflectio
factors from 5 mV to 5 V per divisio at full ba dwidth.
Stable triggeri g is achieved over the full ba dwidth of the verti
cal system. The flexibility a d high se sitivity of the trigger sys
tem provides a ra ge of co ve ie ces such as ha ds-free trig
geri g with the peak-to-peak automatic mode, ormal trigger
mode, i depe de t selectio of TV li e a d TV field triggeri g at
a y sweep speed, a d si gle-sweep triggeri g. The trigger sig
al is dc coupled. A exter al triggeri g sig al or a exter al
Z-axis modulatio sig al ca be applied via a fro t-pa el
co ector a d the source-selector switches.
The horizo tal system provides calibrated sweep speeds from
0.5 s to 100 s per divisio . For greater measureme t accu
racy, a X I0 mag ifier circuit exte ds the maximum sweep speed
to 10 s per divisio .
Accessories
The i strume t is shipped with the followi g accessories: opera
tor's ma ual, two sig al adapters, a power cord, a d a power-
cord clamp. Part umbers for these sta dard accessories, as
well as for other optio al accessories, are located i Sectio 6,
Options and Accessories. The voltage-se si g sig al adapters
were desig ed specifically to compleme t the performa ce of
your 2205.
2205 Operator’s vii

Operator’s Safety Summary
For More I formatio
Should you eed additio al i formatio about your 2205 Oscillo
scope or about other Tektro ix products; co tact the earest
Tektro ix Sales Office or Distributor, co sult the Tektro ix prod
uct catalog, or, i the U.S., call the Tektro ix Natio al Marketi g
Ce ter, toll free at 1-800-426-2200.
The 2205 Oscilloscope.
viii 2205 Operator's

SECTION 1
PREPARATION
FOR USE
2205 Operator's

1

Preparatio for Use
This sectio gives you importa t safety i formatio a d tells you
how to proceed with i itial start-up of the TEKTRONIX 2205 Oscil
loscope.
Before co ecti g the 2205 Oscilloscope to a power source,
read this e tire sectio . Also refer to the Safety Summary at the
fro t of this ma ual for power source, grou di g, a d other
safety co sideratio s pertai i g to the use of the i strume t. Be
sure that you have the trai i g required to safely co ect the
2205 to the sig als you wa t to measure.
The 2205 operates from either a 115-V or a 230-V omi al ac
power li e with a y freque cy from 48 Hz to 440 Hz. Before
co ecti g the power cord to a power source, verify that the
LINE VOLTAGE SELECTOR, located o the rear pa el, is set cor
rectly a d that the proper li e fuse is i stalled. Refer to Table
1-1, Figure 1-1, a d the i strume t rear pa el.
To co vert the 2205 for operatio o the other li e-voltage
ra ge, first check that the power cord is ot co ected to a y
power source. The use a flat-bladed screwdriver to move the
LINE VOLTAGE SELECTOR to the required positio a d i stall the
appropriate fuse (listed o the rear pa el a d i Table 6-1).
SAFETY
This i strume t may be damaged if operated with
the LINE VOLTAGE SELECTOR (o the rear pa el)
set for the wro g applied ac source voltage or if a
wro g li e fuse is i stalled.
LINE VOLTAGE SELECTION
2205 Operator's 1-1

Preparatio for Use
Table 1-1
Power Plugs a d Li e Voltage Selectio
Plug
Co figuratio Power Optio Plug Type
Li e
Voltage
Selector Refere ce
Sta dards11
i8s Std United
States
1 0 V
115V ANSI C73.11
NEMA 5-15-P
IEC 83
UL 198.6
t=^ A1 Europe
0 V 30V CEE (7), II, IV, VII
IEC83
IEC 1 7
"ft A United
Kingdom
40 V
30Va BS 1363
IEC 83
IEC 1 7
A3 Australia
40 V 30V AS Cl 1 IEC 1 7
A4 North
America
40 V
30V ANSI C73. 0
NEMA 6-15-P
IEC 83
UL 198.6
A5 Switzerland
0 V 30V SEV
IEC 1 7
a A 5 A, Type C fuse is installed inside the plug of the Option A power cord.
b Reference Standards Abbreviations:
ANSI —American National Standards Institute
AS —Standards Association of Australia
BS — British Standards Institution
CEE —International Commission on Rules for the Approval of Electric
— Equipment
IEC — International Electrotechnical Commission
NEMA— National Electrical Manufacturer’s Association
SEV —Schweizerischer Elektrotechnischer Verein
UL — Underwriters Laboratories Inc.
1-2 2205 Operator's

Preparatio for Use
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C A U T IO N
DISCONNECT INPUT POWER
BEFORE REPLACING FUSE.
FOR CONTINUED FIRE
PROTECTION REPLACE
C A U T IO N
TO AVOID ELECTRIC
SHOCK. THE POWER
CORD PROTECTION
GROUNDING CONDUCTOR
M U ST BE CONNECTED
TO GROUND.
DO NOT REMOVE
COVERS. REFER
SERVICING TO
QUALIFIED PERSONNEL.
ONLY W ITH SPECIFIEO
TYPE AND RATED FUSE.
POWER
M AX WATTS
50
M AX VA
60
FREQUENCY
4 8 -4 4 0 H z
LINE VOLTAGE
SELECTOR
2 3 0 V
n
TEKTRONIX INC., BEAVERTON. OREGON, U S.A
MADE IN HONG KONG
Figure 1-1. Voltage selector switch, fuse,
a d power-cord receptacle.
2205 Operator's 1-3

Preparatio for Use
LINE FUSE
The fuse holder is located o the rear pa el a d co tai s the li e
(mai s) fuse. Use the followi g procedure to verify, that the
proper fuse is i stalled or to i stall a replaceme t fuse.
1. U plug the power cord from the power source (if applica
ble).
2. Use a screwdriver to press i a d slightly rotate the fuse-
holder cap cou terclockwise to release it.
3. Pull the cap (with the fuse) out of the fuse holder.
4. Verify that the fuse is the same type listed o the back of the
i strume t. The two type of fuses listed are ot directly i 
tercha geable; they require differe t types of fuse caps.
5. Rei stall the fuse (or replaceme t fuse) i the fuse-holder
cap.
6. Replace the fuse holder a d cap.
POW ER CORD
This i strume t has a detachable, three-wire power cord with a
three-co tact plug for co ectio to both the power source a d
protective grou d. The grou d co tact o the plug co ects
through the power-cord to the exter al metal parts of the i stru
me t. For electrical shock protectio , i sert this plug o ly i to a
power source outlet that has a properly grou ded protective-
grou d co tact.
I strume ts are shipped with the required power cord as or
dered by the customer. Power cord plug i formatio is pre
se ted i Table 1-1, a d part umbers are listed i Table 6-1.
INSTRUM ENT COOLING
Mai tai adequate airflow to preve t i strume t damage from
i ter ally ge erated heat. Before tur i g o the power, check
that the spaces arou d the air-i take holes o the sides of the
cabi et are free of a y obstructio to airflow.
1-4 2205 Operator’s

Preparatio for Use
INITIAL STA R T-U P
Up to ow, you should have made the followi g preparatio :
1. Read the safety i formatio .
2. Verified that the LINE VOLTAGE SELECTOR is set for the
source voltage to be used.
3. Verified the fuse.
4. Attached the power cord.
5. E sured adequate ve tilatio arou d the i strume t.
6. Plugged the power cord i to the appropriate power source
outlet.
Now tur o your oscilloscope by pressi g i the POWER butto .
Observe that the Power-O i dicator, located below the butto ,
illumi ates.
2205 Operator's 1-5