Tektronix 7B15 User manual

7 Β 15
D EL AYI N G ΤΙ
B AS E
I NST RU CTIO N
M AN
U
AL'

T
e
I
d
ro n bc
I N ST RU CTIO N M A NU A L
Te k tro n ix, Inc .
Ρ . Ο . Box 500
B eaverto n , Orego n 97077

Serial Nu mber
CO MM ITTE D ΤΟ E XC ELLEN C E
PLE AS E C HE C KF O R C H A N G E I NF O RM ATIO N
AT THE RE A R O F T H IS M A NU A L .
7 Β
15
DEL AYI N G TIME
B AS E
O
PER ATO R S
070-2319-00

F i r
st Pr
i n
ti
ng
OCT 1978
P rodu ct G r o up 42

R
evise d OCT 1983

Co p yrig h t © 1978 Tek
tronix, Inc
. All
rig h ts reserved .
Conte n ts of t h is p ublication may
not
be
r ep r o du ced i n any
form wit h ou t t h e written p ermission of Tek
tro n ix, Inc .
P roducts of Tek tro n ix, Inc . and its s ub sidia
r
ies
are cove r ed
by U .S . and foreign p atents and/or pe n d
ing
patents .
T EK TR O N IX, ΤΕΚ , SCO PE-M O B I LE, a n d
"
are
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I PMEN T
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P rinted
in U .S .A . S p ecificatio n and price ch ange pr ivileges
are rese
r
ved
.
IN ST RUMEN T SER IA L NUMBER S
E ac h instr u ment
has α serial n um b e r on αp anel insert, tag,
or stam p ed on
t hech assis . T he first number or letter
d esig n ates t
he coun try of ma n ufactu r e . T he last five digits
of t h e serial number
are assig n ed se que n tially and a r e
uni q u e to each instrume
n t . T h ose ma n ufact u re d in t he
U nited States have
six uni q
ue
digits . T he cou ntry of
manufacture is identified as
follows :
ΒΟΟΟΟΟΟ

Tek tro n ix, Inc .,
B
eaverto
n ,
O
r ego n , U SA
100000

Tek tronix Gue
r
nsey,
L t d ., C hann el Islan d s
200000

Tek t r o n ix Un ite d
K i n gd om, L
td .,
L
o
n
do
n
300000

So n y/Te k tronix, J ap a
n
700000

Tek tro n ix H olla n d, NV, H eerenvee
n ,
T he N et h e r lan ds

TA BLE O F
CO
N T EN
TS
P AG E
L
IST
O
F I LLU ST R ATIO N S ........... . . . . . . . . ...... .. . . . . . . ii
L IST O F
TA BLE
S ...................... . . . . . ...... .... . . . .
ii
O PER ATO
R
SA
FE TY I NF O RM ATIO N . . . . . . . . . ...... ..... . . . iii
SE CTIO N 1 G ENER A L I NF O RM ATIO N
I N T R OD U CTIO N ............... . . . . . . . . ............ 1-1
OPER ATOR S M A NU A L . . . . . . . .................. 1-1
I N ST RU CTIO N M A NU A L .... . . . . . ............... 1-1
I NSTA LL ATIO N .............. . . . .................. 1-1
I N ST RUMEN T P AC K AGI N G . . . . . . .................. 1-1
S PE CI F ICATIO
N ...............
. . . . . .................. 1-2
STA N DA R D ACCESSO
R I E
S .... . . . . . ..................
1-5
SE CTIO
N 2 O PER ATI N
G
I N ST RU CTIO N S
CO N T R O L S, CO NNE CTOR S, AND I N DICATO R S .... 2-1
O PER ATOR S C HE C K O UT . . ........................ 2-1
SE T UP PR OC E D URE . . . . . . . .................... 2-1
S WEEP FUN CTIO N S . . . . . . ..................... 2-1
T R IGG ER I N G FUN CTIO N S .................... . . 2-4
D E TAI LE D O
PER ATI N
G
I NF
O
RM ATIO N ............
2-5
T R
IGG
ER I N
G
M
OD
E S . . . . . ..................... 2-5
T R IGG
ER
CO
UPL I N
G ......................... . . 2-6
T R
IGG
ER SO UR C E . . ...................... . . . . . 2-6
T R IGG ER SL O PE . . . . . . ...................... . . 2-6
T R IGG ER LEVEL . . . . . . . ...................... . . 2-8
H O R IZO N TA L SWEEP R AT E S ............. . . . . . 2-8
TIME ME AS UREMEN T . ...................... . . 2-8
SWEEP M AG N I F ICATIO N .................. . . . . . 2-8
V A R IA BLE H O L D O FF ................. . . . ... . . 2-8
DELAY-TIME OPER ATIO N ................. . . . . . 2-8
Δ TIME OPERATION ................... . . . ... . . 2-9
M AI NFR A ME OPER ATI N G M OD E S ........ . . . . 2-10
A PPL ICATIO N S . . . . . ................... . . . ...... . 2-10
D EL AY E D-S WEEP ME AS
UREMEN
TS .......... ... . 2-10
TIME-INTERVAL
ME AS UREMEN TS
(DELAY-TIME
M
OD
E ) ............... . . . . . . ... .
2-12
DI FFEREN TIA L TIME-INTERVAL
ME AS UREMEN TS ( Δ TIME MODE) ........ . . . . 2-12
DEL AY E D-S WEEP M AG N I F ICATIO N . . . . . . . . . . . . 2-14
TR IGG ERE D D EL AY E D-S WEEP
M AG N I F ICATIO
N
.................... ... . . . .... 2-16
I N D EPEN D EN
T
TIME-INTERVAL
ME
AS
UREMEN TS ...................
. . . ...... . 2-16
S E CTIO N 3 I N ST RUMEN T O P TIO N S
C H A N G E I NF
O
RM
ATIO N
719115
Ope
r
ato
rs

7
Β 15 Operato r s
LIST OF
ILLUSTRATIONS
FIG URE
NO .

P
AG
E
Frontis-
p
iece

7Β15 Feat ur es
........... . . . . . . . . . . .
. .......... .iv
1-1

L
ocatio
n
of
r
elease latc h . . . . . . . . . . ............ 1-1
1-2

7Β15 d i m ensional dr awi n g . . ... . . . . . . .........
1-5
2-1

Fr o n t- pan
el co
n
tr ols, con n ecto r s,
a nd i nd icato r s ............ . . . ... . . . . . . .........
2-2
2-2

E ffects of LEVEL con t r ol a nd S L
O
PE
switc hon c r t d is
p
lay ........ . . . ... . . . . . . ......
2-7
2-3

A r ea of g r atic u le used fo r most acc ur ate
ti m e meas ur eme n ts ......... . . . ... . . . . . . ...... 2-8
2-4

E ffects of swee p mag n ifie r on c r t d is p lay . . . ... 2-9
2-5

( Α ) Delayi n g-swee p d is p lay pr o du ced b y 71315
i n
t
he Α ho r izo n
tal com p a
r
tment . ( Β ) Delaye d -
swee p d
is p
lay pr
oduce d by com pan io n
ti m e-base unit in t he Β h
o
r izo n
tal
com p a r tme n t ......................... . . . ... ...
2-9
2-6

Ty p ical Δ (Diffe r en tial) Time O pe r ation
. ....... 2-11
2-7

M eas ur i ng time i n te r vals f r o m α tr igge r i n g
even t (sta r t of swee p ) to any p oi n t on
waveform .................... . . . . . . . . . . . ..... 2-12
2-8

M easu r i ng r isetime, fall time, pe r io d ,
f r equ ency, o r pu lse wi d t h i n t he Δ ( d iffe r ential)
ti m e mo de ...................... . . . . . . . . ..... 2-13
2-9

M
ag
n ifying
α selecte d seg m ent of t h e d elayi n g
(
Α )
swee p
i
n t he d elay-time mo de wit h
mainf r
a m e alte
r
nate or cho pp e d ho r izo n tal
o peration . . . . . ........................ .
. . . . . . . 2-14
2-10

Time-in te r val m eas ur eme nts i n
t
h
ed elay-time
a nd Δ (diffe r e n tial) time mo d e wit h mai n fr
ame
alte rn ate o r c hoppe d ope r atio n ........ . . . . . . . 2-15
2-11

E xa m ini n g an eve n t t h at occ ur s wit h i nα
selecte d time i n te r val afte rα kn ow n d elay
ti m e in t he delay-ti m e m ode ............. . . . . 2-16
L IST
O F TA BLE S
TABLE
NO .

P AG E
1-1

E lectrical C h aracteristics ... .... . . . . . .

1-2
1-2

En vironmental C h aracteristics
... . .... .

1-5
1-3

Ph ysical C h aracteristics . . .....
. ... . . . . 1-5
REV Α S EP 1980

OPERATORS
SAFETY SUMMARY
71315 Operators
The following general safety inform service personnel . Specific
warnings and service personnel . Specific warnings and
cautions
will
be
found
throughout the manual where they apply and should be
followed in each instance .
WARNING statements identify conditions
or practices which could result in personal injury
or loss of life .
CAUTION statements identify conditions
or practices which could result in damage
to
the equipment
or
other
property .
GROUNDING THE INSTRUMENT
WARNING
To reduce electrical-shock hazard, the mainframe (oscilloscope)
chassis must be properly grounded . Refer to
the mainframe manual for grounding information .
DO NOT REMOVE INSTRUMENT COVERS
To avoid electric-shock hazard, operating personnel must not
remove the protective instrument covers .
Component
replacement and internal adjustments must be made
by qualified service personnel only .
DO NOT
OPERATE
IN
EXPLOSIVE
ATMOSPHERE
To avoid explosion, do not operate this instrument
in an explosive atmosphere unless it has been certified for
such operation .
PREVENT INSTRUMENT
DAMAGE
CAUTION
Plug-in units should not be installed or
removed without first turning the instrument
power
off,
to prevent instrument
damage .

7113115 Ope
r ato r s
71315 F eat u res
2319-1
The 7B15 Delaying Time- B ase u nit pr ovi des cali br ate d swee p r ates from .2 seco nd s
to 2
nanoseco nd s an d t r igge r ing
to
1 Giga he r tz fo r
7100-, 7700-, 7800-, an
d
7900-se r ies oscillosco pes . T h e Χ 10 M agnifie r i nc r eases eac h swee p r ate by
α factor of
10
an d α V A R IA BLE co n trol allows
co n tin uou sly va r ia b le swee p r ates between calibrate d ste ps . V aria b le
h ol
d off
an d
al pha-n u me r ic r ea d
o
u
ts are pr ovi ded . Also, w h en o p e r ati n g i n t he A U TO TR IGG ER I N G M OD E , α br ig h t
b aseline trace is d is p layed in t he absence
of α t r igger sig n al .
Ot h er feat ur es inclu d e in d epe nde n t swee p ope r ation of contin
uou sly varia b le swee pd elay (D EL AY TIME) and
d iffe r ential sweep d elay ( Δ TIME) with α companion time- b ase un it .
Delay time or
d
iffe r ential delay time readou t is
d isplaye d on t h e mainf r ame cat h o d e- r ay t ube .

I N T R OD U CTIO N
O PER ATO
R
S
M A
NU A
L
I N ST RU CTIO N M A NU A L
G
E N ER A L
INF O RM ATIO N
The
O p e
r
ators Manual co n tai ns info r mationnecessa r y to
effectively ope r ate t h e
71315
Time B
ase an d is d ivi ded
into
t
h
ree sections
:
Section 1
p rovi
d es α b asic
d esc r i p tion of t h e
71315
wit h
instrument specifications
a nd accessories ; section2 co n tains
ope rati ng
information for t he instr u ment ; inst r ument op tion
i
n for mation is located in section 3 of t he manual .
The Instruction Manual pr ovi d es bot h o pe r ati n g
an d
servici ng informatio n fo rt he 71315 Time B ase
.
T he
I n structio n Manual is d ivi ded into nine sectio n s .
O pe r ati ng i n fo r matio n is cove r e d i n t he first two sectio n s ;
se
rvici
ng i n for mation for u se b y q ualifie d se r vice
p erson
n
el is
containe d in
t
he
remaini n g seven sections
of t he manual .
Sc
hematic
d
iag r
ams
are
locate dat t he
r ea r of t h e man u al and
can
be un fol d
ed fo
rr
efe r ence
w h ile r ea d ing ot he r p arts of t he ma nu al . T he
reference
d esig n ators an d symbols u se d
on
t he
sc hematicsa r e
define d on t h e fi r st page of t h e Diag r ams an d
Ci r cu it
B oar d Ill u st r ations section . All ab br eviations use d in
t
h
is
man u al, wit h t he exce p tion of t he p arts lists
and
sc h ematic d iagrams, com p ly wit h t h e American N ational
Instit u te
Υ
1 .1-1972 pu blication . T he parts lists are
comp u te r p r into u ts an d u se com pu ter-supp
lied
a bbr eviatio n s . Instrument option information is locate d in
section 6 of t
he I
n st ru ctio n Manual .
I N STA LL ATIO N
T he time- b ase unit is
d
esig n e
d
to ope
r
ate in t h e
h orizontal plug-in com p artme n t of t he mai n f r ame . Th is
instr ument can also be
installe d in
α ve
r tical p
lug-i n
compa
r
tment
to p r ovide α ve rtical swee p on t h e c r t .
H owever,
w h
en
u se d i n t h is manne r , t he r e are no
inter n al t r iggering or ret r ace bla nk i ng p r ovisions, an d t h e
u n it may not meet sp ecifications .
Section 1-7 Β 15 O p erators
wit h t h e front panel of t
he mainframe
.
E ven t h
oug
h
t
h
e
gain of t he mainframe is sta nd a rd ize d , t he swee p
cali b rationof t h e un it sh ould be c h ec k ed w
h
en installe d .
The p roce du re fo r c h ec k
ing
t
h
e unit is
given
un de r
Sweep F un ctio ns in t he Ope r ato
r
s Ch ec kou t p r oce dur e in
section 2 .
To remove t h e unit, pull t he release latc h (see F ig . 1-1) to
d isengage t
he unit f r
om
t he mai n f r
ame, a
nd
pull
it
out of
t h e p l u g-in compa
r
tment .
IN ST RUMEN TP AC
K AGI N
G
If t
h
is
instr u
me
n t is to b e sh i pp e d fo r long d istances by
com m ercial means of trans p ortation, it is recomme nd e d
t h at it be r e p ac k age d i n t he o r igi n al man n e r fo r
maximum pr otection . T he original sh i p ping carto nshou l d
be saved an du se d for t h is pur pose .
If
mo
r
e
i
n formation is
n ee d ed, contact you r local Te k tronix F iel d Office o r
r ep rese n tative .
ι
Ι
Ι
ΙΙ
Ι
Ί
i
Ί
Ί
Ι
Ί
Ί
Ί
Ι
RELE AS E
To install t he un it i n α p lug-in com pa r tment, align t h e

ι

L ATC H

Ι 196ο -13 Ι 2319- τ
u pp er and lower rails of t h e pl u g-in wit h t he mai n frame
trac ks and p us h it i n until it fits fir m ly i n to t h e
com partment . T he front p anel of t he unit s h oul db e fl u s h

F ig ur e 1-1 . L ocatio n of r elease latc h .

Gene r al Information-713115
Operato r s
Th
is
i n st rum ent will meet t h e elect r ical cha r acte r istics liste d i n Table 1-1, followi ng com p lete a dju stment . T h e
following
elect r ical cha r acte r istics a r e valid ove r t he state d envi r on me n tal ra nge fo r i n st r uments cali b rated at an
am b ie n t
te mp erat ur e of +20° to +30° C, an d afte r αtwenty- m in u te wa r mu p u n less ot h erwise note d .
Swee pR ates
C
h
a
r acte r istics
S PE CI F ICATIO N
TA BLE
1-1
E lectrical C
haracte r istics
S WEEP G
ENER ATO R
Calib r ated R ange

0 .2 s/d
iv
to
2ns/d iv in 25 ste p s . Χ 10
M agnifie r exten d s
~
fastest cali br ated swee p rate to 0 .2 ns/
d iv .
V a r ia b le
R ange

Co n tin uously va r ia b le u ncali b rate
d swee p r ate to at least
~
2 .5 times t h e cali br ate d swee p r ate
setti ng .
Swee p Accuracy'
with
7104, 7900 and 7800

M eas ur e d ove r center 8
d
is p
laye d d ivisio ns . S WP CA L is
Se r ies
M ainf r ames

a dj uste d at 1 ms/ d iv with in t
he +20 to +30° C r an ge .
(7 Β 15 Delay M o de
Switc h set to Indepen de n t .)
+15 to +35° C

UNM AG

M AG Χ 10
0 .2 s/ d iv to 10
n s/ d iv

2% ο

3°/ ο
5 ns/ d iv and 2
n
s/d
iv

3°/ ο

4 %
2
0 to +50°
C

De r ate +15 to +35° C acc ur acy b yadd
itio n al 1 °/ ο .
E xcl ud e
dP o r tions of Swee p
7104

N one .
7800, 7900 Se
r
ies

F i r st 5 ns .
Swee pLen
gt h
At least 10 .2 div .
M
AG
R egist r ation

0 .5 div o r less from g
r aticule center w hen c han
ging f r o m
M AG Χ 10 to M AG Χ 1
.
P osition R ange
P OSITIO N Cont r ols
f
u
lly C W Sta
rt
of
swee p m u st b e to r ig h t of gratic
u le cente r at
1 ms/div .
P OSITIO N Cont
r ols f u lly CC W

End of swee p m u st b e left of g r atic
u le cen te r at 1 m s/ d iv .
'So m e main
fra m es limit fastest cali br ate d sweep
r ate .
2 200 ρα
/ d iv is m eas ur e d ove
r
any 5 d
ivisio n s wit h i n t h e ce n te r 8 d ivisio n s .
P erfo r mance Req
uireme n t

Δ TIME
R ange
Acc
ur
acy (20 ms/
d iv to
100 ns/
d iv)
+15 ο
το +35 ο C
Οο to +50 ο C
T R AC ES EP R ange
D EL AY TIME
R ange
J itte r
0 .2 s/div το 50 μ s/div
20 μ s/d iv το 100 ns/div
A b solute Delay Acc ur acy (Sta r t of delaye d swee p
wit h r esp ect to start of delaying swee p ; Οο to
+50
ο
C)
0 .2 s/
d
iv to 10 μ s/
d iv
Diffe r
ential
M
easurement Acc ur acy ( M easu r e-
ment is ma d e by sub t r acting 2 delay time
r ead i ngs
;
0 .2 s/d iv to
100
ns/ d iv ;
Οο to 50 0 C)
T r igge r
Se
n sitivity fo r R ep etitive Sig n
als
Co up ling
AC
AC
LF REJ °
AC HF REJ
DC 5
C h a r acte r istics
TA BLE 1-1
(CO
N T .)
E lectrical C h a r acteristics
V A R IA BLE TIME D EL AY
P erforma n
ce
Req
ui
r
ement
0 .0 to at least 9 .0 times ΤΙΜΕ /DI V setting .
W it h in (0 .5% of M eas ur eme n t + 3 d igits) .
W it h i
n
(0 .5% ο of M easure m ent + 4 d igits) .
Gene r al
Information-7131 5
Operators
F unctio n
al only in t h e Δ TIME M od e w hen alte rn ati ng o r
chopp i ng
b etwee
ntimeb
ase u nits . Th e seco nd d elayed
swee p d is p lay
can
b
e vertically p ositio n e d at least
3d ivisions b elow t he fi r st d elaye d
swee pd is p lay w
h
en t he
m ai n f r ame ve r tical trace sepa r atio nco n
t
r
ol is cen tere d
.
0 .2 o r less to at least 9 .0 ti m es ΤΙΜΕ /DI V setti ng .
(0 .02%ο of ΤΙΜΕ /DI V setting) o r less
(0 .03% of ΤΙΜΕ /DI V setting
+ 100 p
s) or less .
W it h i n
(0 .5
ο /
ο of Delay + 5 ο/ ο of ΤΙΜΕ /DI V setting) .
W it h in
(0 .5 ο % ο of M eas ur eme n t + 4 d igits) .
T R
IGG
ER I
N G
T r igge r i ng Fr equ ency

M inimu m T r igge r ing
R ange 3

Ι

Sig n al Re qu i r ed
30 H z
to 250 MH z

0 .5 d iv
250
MHz το 1 G H
z

Ι

1 .5 d iv
50 kH z to 250 MHz

0 .5
d iv
250 MHz to 1 G H z

Ι

1
.5
d iv
30 Hz to 30 kH z

Ι

0 .5 d iv
Dc to 250 MHz

0 .5 d iv
250 MH z to 1 GH z

Ι

1 .5 d iv
Inte rn al Ι E xte r nal
50
m V
150 m V
50
mV
50
mV
150 m V
'T h
e
t r igge
r i n g f r e qu e n cy r an
ges give n he r e a r e li m ite d to t h e -3 d8 fre qu e n cy of t h e oscillosco pe
vertical syste mw h e n ope r ati ng i n t h e
I n ter n
al m o d e .
° W ill n ot t r igge
r on si n e waves at o r b elow 60 Hz w hen a mp
lit
udes a
r
e less tha n 8 d ivisions
I
n te rn al o
r
3
volts E xter n
al
.
50 m V
150 m V
'T h e
T r igge r i n g Fr e qu e n cy R a n ge fo r DC CO UPL I NG a p p lie d to f r e qu e n
cies a b ove 30 Hz w h e nop e r ati n g i n t he A U TO TRIGG ER I NG
M OD E .