Tektronix sg 502 User manual

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Te
k tro n i x ,
Inc .
Ρ . Ο . Box 500
B ea v erto n , O r ego n 97077
T EK TR
O
N
IX°
SG 502
OSCILLATOR
I N ST R U CTIO
N M A N U A L
Serial N u m be r
070-1430- 0 1

1176

REV . Β
NO V 197 6
S E CTIO N 1
S E CTIO
N 2
W A RN ING
TA
BLE
O
F
CO
N T EN TS
T he r
emai
n i ng portion o f t h is Table of Co n te n ts
lists servici ng Instr u ctio ns
t h
at
expose p e r so nn el to h azardo u s voltages .
T h ese Instructio ns a r e for
qu alifie d service pe r sonnel o n
ly .
CHANG
E I NF O RM ATIO N
SG 502
ί
S
E
CTIO
N 3 AD JUST MEN T
3-1
S E CTIO N 4 M AI N
T
EN
ANC E A ND I NT ERF ACI N G I NF O RM ATIO N
4-1
SE CTIO
N
5CI
R C U IT D E SCR I PTIO N
5-1
SE CTIO N 6
REPL AC EABLEELE CT R ICA L P AR TS L IST 6-1
O PTIO N S
SE CTIO N
7 DIAG R AMAND CI R CU IT B OA R D I LLU ST R ATIO
N 7-1
SE CTIO N 8
REPL
AC
EABLE MECHA N ICA L P A R TS L IST
8-1
AND EXPL OD ED V I EW
P age
O PER ATI NG
I N
ST RU
CTIO N S 1-1
S PE CI F ICATIO NAND PERF O
RM
A
N
C
E
C
HEC K 2-1

Fig . 1-1 . SG
502 Oscillator Plug-in Module
.

Th e SG 502 ge n erates low d istortion si n e
waves and
s qu are waves ove r α f r eque n cy r a n ge of 5
Hz to 500 kH z . Α
stable RC oscillato
r p rovides 5 V r ms out pu t u nder no
loa d , o
r 2 .5 V rms i n to α 600 Ω load . Α co n ti n uo
u sly-
variable co n trol affo rd s greater t h an 40 dB
sine-wave
attenuatio n in a dd itio n to pus hbutton -selecte
d 10, 20, a nd
40 dB steps . Α 0 to +5 V fixed am p lit u desqua
r e wave, at
t h e same freq u en cy as t h e si ne wave, is
available from α
sep a r ate fro n t pan el co nnector .
T h
e SG
502 also featu r es
an exte rn al sync in pu t w h ic
h loc ks t h e out p ut fre qu en cy to
Installation
and R emoval
T urn t he P owe r M
odule off before inse r ti ng t he plug-
in ; ot he r wise,
d amage may occu r to
t h ep lug-in
ci r cuit
r y .
REV
. C N O V 1976
IN ST RUMEN T
D E
SC
R I P TIO N
PREP A R ATIO
N F
O
R U S E
F ig . 1-2 . Plug-In M o du le Installation/removal .
Section 1-SG 502
O PER ATI N G
I N
ST
RU CTIO N S
α sync h ro n izi n g
sig n
al
. Α si ngle d ial a nd five decade
p us hbu ttons p
rovide fre quen cy selectio n .
T he elect r ical ch a r acteristics a
r
e
vali d
only
if t he
SG 502 is cali b rated at an am
b ie n t tempe r at u re betwee n
+20° C a nd +30° C and op
e r ate d betwee n 0° C a nd+50° C,
unless ot
herwise n oted . T he outp u ts must be terminated
i
n 600 Ω loads .
R efe r to F ig .
1-2 . C heck to see t h at t he plastic barriers
on t he i n terconnecti
ng j ac k of t h e selected P owe r M odule
com p art m en t matc
h t h e cut-outs i n t he SG 502 ci r cuit
boa r d edge
co n nector .

Operating Instructions-SG 502
VAR AMPLITUDE
0 to > 40 dB
attenuation
continuously variable
.
Square-wave
output BNC
connector .
SYNC INPUT
Connect to external signal
source for synchronization .
Sine-wave output BNC
connector .
STEP ATTEN
Calibrated
attenuation steps .
Fig . 1-3 . Front panel controls and connectors .
POWER
When lit, indicates power
is
applied .
FREQUENCY Hz
Calibrated from 0 .5 to 5.0
.
Selects frequency in con-
junction with MULTI-
PLIER .
MULTIPLIER
Multiply FREQUENCY Hz
dial setting by active push-
button to obtain output
frequency .
1430-03
REV .
C
NOV
1976

Alig n t h e SG 502 c h assis wit h t h e upper an d lower
guides of t he selected com p artme n t . Pu s h t he mo dule in
a nd press fi r mly to seat t h e circuit boa r d i n t he i n te r-
conn ecti n g j ack .
To r e m ove t he SG 502, pull on t he release latc h , located
i n
t
he
lowe
r left
corn
e r ,
un til
t h
e
i
n terco n necti n g j ack
d ise n gages an d t he SG 502 will sli d e ou t .
Apply p ower to t he SG 502 b y p
ulli n go u
t
t he powe r
switch kn
o
b
of
t he P owe r M od u le .
M ak i ng Con n ectio n s
F ig . 1-4 s h ows an
eq uivalent ci r cuit fo r t h e 600 Ω sine-
wave an d s q ua
r e-wave out p uts of t h e SG 502 . Α 50 Ω
coaxial cab le adds abo u t 30 pF per foot to t h e output
.
U se
sh ort cables to avoi d reduced si n e-wave am
p lit ud e an d
roun ded square waves, especially at
h ig h er fre q ue n cies .
Sync
hr
o
n
izatio
n W it h an E xter n al Device
To
sy nc h ro n ize t he SG 502 wit h an exter n al oscillato r ,
p lug t he si n e-wave outp u t of t h e exte rn al oscillator
i n
to
t he SY N C I NPU T j ack on t h e front p a
n el . Attem p ti ng
sy nc h ro n izatio n wit h ot h er t
h
anα si
n e-wave may cause
h
a
r
mo
n ic d istortion of t h e SG 502 o u tp u t . M axim u m
pur ity is obtained wh en bot h signals a
r e t h e same
fre q ue ncy .
T h e f r eque n cy range over w h ic h t h e syn c h ro n ization
occurs de p ends upon t h e
amplitude
of
t h e syn c h ro n izi n g
signal .
T he voltage
req
u ire d fo r syn c h ro n izatio n varies
li n early f r
om
0 V (when t he fre qu e n cies are i d e n tical) to
a pp roximately 5 V rms (w hen t h e f r eq uencies diffe
r
by
5 ο/ο ) .
A pp roximately α
1 V ρ - ρ si n e wave at t he oscillato r
fre q ue ncy is available from t he SY NC I NPU T conn ecto r .
Th e sou r ce im p eda n ce is 10 k Ω .
REV . C
N O V 197 6
Co
n trols
an d Co nn ecto r s
R efer to F ig . 1-3 . Eve n t h o u g h t h e
SG 502 is
fully
cali brated an d r ea d y to u se, t he f un ctio ns an d actio n s of
t h e cont r
ols a nd conn ecto r s sh ou ld b e r eviewe d befo r e
attem p ti ng
to
u
se it .
Note
t he ST EP ΑΤΤΕΝ pu s hb utto ns
a r epush -p ush actio n
s,
w h ile all t h
e r est a
r
e self-
ca n celli n g actio ns . N ote also t h at t h e P O WER lig h t is t he
only visual i nd icatio n t h at t h e p owe r is b ei n g a pp lied to t he
SG 502
.
O PER ATI N G CO N SID ER ATIO
N
S
Sy nch ro n izing an E xter n al Device
T h e +5 V s q uare-wave o u t pu t can be used to syn
-
ch ronize an exte r nal d evice suc
has α
coun
te r o r os-
cilloscope :
T h e s qu are-wave am p lit ud e will be +5 V ope n-
ci r cuited, and will d ecrease as t he loa d im ped an ce
decreases .
O p
e r
at
i ng I n str u ctio n s-SG 502
600 Ω
F ig . 1-4 . Eq uivale
n
t
600 Ω ou t pu t ci r cu its .
1 α 3ο - οα

Ope
r ating Inst ru ctions-SG
502
REPAC K AGI N G
F
O
R S H I PMEN T
If t
h
e
Te k tronix i n strument is to
be s h i p pe d to α
Te
k tronix Service Ce n ter for
service or re p air, attac h α tag
sh owi n g : owner
(wit h ad dress) a nd t
he n ame of an
i n dividual at
your firm t h at can be co
n tacte d , com p lete
i n
str u me n t serial num ber an dα d
escriptio n of t h e service
re q uire d .
Save a nd re- use t h e pac
k age i n w h ic h your instrument
was sh i pp ed . If t h e
original p ac k agi ng is
unfit for use or
n ot available,
repac k age t he i n str u me
n t as follows :
1 . O b tai n α carto
n of corrugated cardboar
d h avi ng
i n si d e dimensio nsof no
less t han six i n c hes
more t han t h e
i n strume n t dime
n sio n s ; t h is will allow for
c ush io n ing .
R efe
r to t h e following table for
carto n test st r ength
re q uirements .
2 . Surrou nd t he
instrume n t wit h p olyet h yle
n e
sh eeting to
protect t he fi n is h of t h e instrume
n t .
3 . C us h io n t h e i n str
u ment on all sides b y
tig h tly
pac k i n g dunn age
or uret h ane foam b etwee
n carton and
i n str u me
n t, allowi n g t hree inc hes on
all si d es .
4 .

Seal carton wit h s h
i pp i n g ta p e or i n dustrial stapler
.
S
H I PP I N G CA R TO NT E STST
REN GT H
G r oss W eig h t (I b ) Ca
r to n Test St r e n gt h (lb)
0-10
200
10-30
275
30-120
375
120-140
500
140-160
600

S PE CI F
ICATIO N
S
Table 2-1
E lectrical C h aracte
r istics
Section
2-SG 502
S
PE
CI
F ICATIO N
A N D
PERF O
RM A N
C
E C HE C K
I n troduction
T h
is p roced
ur
ec
h eck s t he electrical ch aracteristics of
t he SG 502 t h at appear in t he Specificatio n . If t he
i n st r ume n t fails to meet t h e r e qu i r eme n ts given in t h is
perfo r ma nce c h eck , t he cali b ration procedure sh oul d be
p erformed . T h is proce dure ca n also be used by an
i n comi n g i nspectio
n
facility to determi
n
e acce
p tability
of
p e r forma
n ce .
REV . Α JUN 197 7
PERF O RM A N C E C HE C K
T h e electrical c h aracteristics are valid only if t he
SG 502 is cali b rate d at an am b ie n t tem pe r ature of +20° C
to +30 0 C and op erate d at an ambient tem p eratu r e of 0° C
to +50°C . F orce d air circ u latio n
is
requ
ired for
am b
ie
n t
tem p erat u res above +40°C .
Toleran ces t h at are specified i n t h is p e r fo r ma n ce ch ec k
proced u re apply to t h e i n st ru me n t un der test a
nd
do
n
ot
include test e q uipme n t erro r .
C h aracte r istics
P erforma n ce R equi r ements Su ppleme
n tal I n fo r matio n
Si ne W ave
Fr e q ue n cy R an ge
5 Hz to 500 kH z
Calibratio
n Accuracy W it h in 5 ο / ο of dial setti n g
f r
om
5Hz
to less t
h
a
n
50
kH z ; wit h i n 10 ο/ο
of d ial setti n g from 50 kH z to
500 kH z
Am p litude R esponse
W it h in 0 .3 dB over en tire r an ge
(1 kH z refe r e n ce)
M axim u m Out p ut
V oltage 5 V r ms, o pen circ u it, 2 .5 V rms
into α 600 Ω loa d
H a r mo n ic Distortio nL
ess t h an 0 .035% from 20 Hz to
50 kH z . L ess t h a n 0 .15% ove r t he
remaining fre q uency ra n ge
Hum/ N oise
L ess t han 0 .1 ο / ο of rate d ou
tput
Atte n tuatio n0
to greater t han 40 d B
conti n
uo
u sly
varia b le . 10, 20, a nd 40 d
B ste ps
wit h in
t2°/
ο
for eac h ste p
Sq uare W ave
F re quen cy R an ge 5 H z to 500
kH
z
Am p litu de
Approximately +5 V op en-circ u it
(+2 .5 V i n to α 600 Ω load)
R
ise
a ndF all Time L ess t h a n 50 n s i n to 50
Ω
o
r 600 Ω ;
te r mi n ated an d
meas u red at t he fro n t p anel
Sy n c I np ut
In p ut Im p eda nce 10 k
Ω

S p ecificatio ns and P erformance C h ec
k
-SG
502
Test
Eq ui p ment R equi r e d
The following test eq uip
m e n t, ore q uivalen t, is re qu
ire d
to perform t he
performance ch ec k , Test eq u i p
me n t
c h aracteristics
liste d are t h eminimum re q
uire d to verify
t he
performance of t h e eq ui p me n t u n d er
test . Su b stitute
e quipme
n t mustmeet or exceed t he state
d re qu i r eme n ts .
All test e qu i p me n t is ass
u med to be operating
wit h i n
tolera nce .
' R
equ
i
r es TM 500 se r ies p owe r
mo
d
ule
.
2-2
Ta b le 2-2
L ist of Test Eq
uipme n t R eq u irements
S p ecial test devices are used
w h ere necessary to
facilitate t h e p rocedure .
M ost of t h ese are availa b le from
Te k tro n ix, Inc .
a nd ca n be o rd ere d t hroug h your local
Te k
t r onix F ield Office or represen tative .
REV 13, JUN 197 8
P erfo rm ance
Desc
r i p tio
nR
equi r
ements A p plication
E xample
Oscilloscope
B a ndwi d t h , do to 50 MHz ; min
- Used t hr o ugh out
proce- α . Te k tro n ix 5440,
im u m d eflectio n facto r , 5
m V /div ; du re to pr
ovi de dis p lay . 5 Α 45, 5A1 3N, 51342
sweep rate, to at least
50 n s/div ;
Oscilloscope System .
differe n tial com p arator
ampli-
fier, compariso n
voltage,
0 V to±10
V .
Cou n ter M aximum F re q ue
n
cy,
500 kH z ; U sed for ste p
1 . α . Te k tronix DC
503 .'
P erio d
Avg mo d e ca p able to
10 3 ; O u tp u t sen sitivity,
5 V ; Display acc ur acy,
1 cou n t
i n 10 3 .
Distortio n
M easure h armo n ic d istortio
n , less U sed fo r ste ps 3, 4, and 6 .
α . H ewlett- P ack ar d
A n alyzer
t han .035% fro m 20 H z to 50
kH z ;
ΗΡ 334 Α .
less t h a n 0 .15%
over t h e r emai n i n g
fre q uen cy
r ange .
P owe r M od ule
Acce p ts TM 500-series p
l
u g-i
n s . P rovi d es p ower fo
r SG 502 α . Te k t r o n ix TM 503
.
a nd DC 503 .
10 Χ p assive Compati b le wit h test oscillosco p eU sed for ste p s 7 an d 8 . α . Te k tro n ix Ρ 6060 p r o be
.
pro be to be used
Termi n ation Im pedance, 50
Ω ; connectors, O
u tput termi n atio n fo r α .
Te k tro n ix P art No .
BN C ;
accu r acy, 2 ο/ο
sig n al ge n e r ators, if
011-0049-01 .
amplifier is n ot
50 Ω in p ut
im p
edance .
Terminatio nI
m
peda
n ce, 6000 ; conn ecto r s,
O u tput te r min ation fo r
α . Te k tro n ix P art No .
BN C .
sig n al ge n erators,
if 011-0092-00 .
am p lifier is
not 600 Ω i n put
im p edance
.
Ada p te r Connecto
r
s,
b a n an a plug to
H armonic distortio n and
α . Te k t r onix P art No .
BN C .
si n e-wave o u t p ut c
h ec k . 103-0090-00 .
Cable
Impe d a n ce, 50 Ω ; ty peR G-58
U ; U se d for sig n al
α . Te k t r o
n ix P art
No .
le n gt h , 42 i nch es ; con
n ectors, BN C . connectio
n t h ro ugh -
012-0057-01 .
out proced
u re .