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-'tx: MANUAL.
C;A
l'f,-
s\i1(,h.
\\,hi)r
OPEN.
r,r,,1
r,rls
r'l' lrltli
:. rjt:1..rs
ll tll
r
I,st.r- rr,. ,,,.,. Il .,r,:r..-
qrr(,ncv
DtailsLll'uutcllt
il
fi,.
r,,sc(.oltrl
(u1(,
tInte is.l(,_
sired,
tht]
IIANL]AL GAaE s\!itch shoirl(i
i)e
Cl(Js(,(l
sonre
ljnte
'Det,,vec[
th{,
,lth
a .] stjl
si,(.i)Dil
llItcr.
.OLii
I
_
it,t
h.,s
r,,.-uD.
lJl('L
.,1
,
r., ;:r i
.-,
.
.,
r
I-
r.t,.,.
rr
,
ll,'xl.llrru]r
l)ul5n
.rrl.,
1.,s.
rl,'
:1..1,.
'Ihcn:
Freq.
in
r:1ts
,
total
nuntber'
ol
(,ounts
gatc
tinrc
(scc.
)
Sin(i.r
with a
longer.
girte
ti
rc the total colllit in-
crcitsoS, the
.1
(.ount er.r.of der,r'r,ases,
Thtrs
[ot
r
5-s.rc. gate,
loI
cxalnplc. tho
. 1
(oul]t
arrl)r
is
1.5 rh.rr ,rr
lr
l-se,
,
ilJle.
The
llul]rbcr.oI perio.ls l)eil]g nleasuroti
a:ut
ilLso
l).
extended by using
the M,ANUAL GATII s!vir(.h i,r
l
simiLar
mannarr.
FreqLrenci,
Iiatio
The
pcriod
(]1
a
\\.ave
gencrlllv is
mr)usul.cd
in
tcr.n)s
oI
tinle.
If the I'IME UNIi s,vit(h is
turnecl
to EXT.
thc
period
tilat
l)e
lnoasurt{i in ternrs of anothcr Ire_
quency.
and
t]}c
displiived count
will
l)e
the
l.lrlio
ll.-
tlveen the
two freqLrcnci('s.
Il
the lower of thc two
lrequclcies is
connected to
INPUT.
the
higher of
the
two
connected
to
EXT..
an.l
Lhe
FUNC
f
ION
SELEC
tOI(
snr
:r' pEIrlOD.
f
r..qu(,n(,!
r.ltros fron)
1:l to
100.UoU:l 0rirv
l,{
t..Jd.
With
FLrNC
IION SEUCTOR sct
at
10
PERIOD
A\.FlIt_
AGE, ratios mav
l)e
rer.i lr.oIlt
.
1:1
up
to
10.000:1.
Il it
is desired
to
rl)casurc
larger ritfi()s.
a
mecluni_
cal
registcr
nrav l)e connected
to the
C:OUIITER
OLT-
PU'I-
to
ext(,nd
the rrngc.
Time Lrteryal
Measu
renrenls
Sect.
II
Page
?
CAUTION
\!'itttr
nirIrIII.Lnic
lrI
(,onla(
ts ol alt\
I.iind
tlr
1.,\
-'.\,r.
ltr.5
,
r i
.n.C
.rSrrl
t
,
a,.lr-
Clillo
rilrt)LtlSaS
lr)r'
linra
illtcr.,
iil
nlclls-
Lr
rci)tr
nts.
nre( !ruti()Ds
lnust
l)e
titk(
n.
Mt:charrit
irl (,ontllrts iu'e sill)jcct
t1)
(rl)n-
liic
l'... 1,.i \!'l.i, lr l,l.u,lLt!,.s .l \ L.l.\ |l.-
tosular
lnlpLrLso
irs indicate.l
in
I.lgur'e
2-4.
This
type
of pulse .\,il.l not
tr.igger
th(,
co!ntcf
.11
thc
.l(,sired
tinle lr(l
ul]-
dcr tllesc .ondittons
it is
il1rpossil]Ie to
ul
iil{(,
i1c c u
t:1t
(,
o
r.
(ons ista]]tt
In
eas
u
re
-
nr.,l)ts.
Whalr
luechallical contacts
ar(l
!.is(,:l
to tl igSCI the
(
oLlntcr, the intpulso
Ir'ont lhasa
a,rnta(ts should
be
f.ie,,ved
on
.r
lr L
l,rrrr,l
.,sr
illos,,rt,r.
Arr\.
iltr-itr_
lnritles th.lt llrc
pr(.scl]t lrtay thcn
i]c
takell !llto
iICcoLlnt
Figut'e
2-,1.
Elfect of Coutact
Bouncc.
I'lru!!.1-,llt99-
Photoelect|ic
transducer.s
nre
used
where
it
is
in]_
possible
or
inlpr.actical to use ntcchanical
connec-
tiors lor
the
desilcd measurement. A g0-volt
photo_
tubc polar.izing \.oltage
is
available at the
r;ar
of
the instr.utuent. Tllc
outpLrt
oI the phototulle lnav
be
.{,nne,
l.d
r,,
'.ithr.r rhI StArlT,'r.STOP inpur
,t
rhe
roultter through
a
(
()upling
cap.rcitor.
Sincc thcse
aIe direct-.oupled inputs.
it
is dcsiral)le to
iDcluale
a l)il)cking ci.rplrcitor' bct!veen
the phototulte
and the
instrument
inpLlt.
Phasc
Shitt
Measu
l,eDt
ents
Ihe
phase
dilfefence
between
trvo
wavelorms having
the srme IreqLlency ma! lle measured in terms oi
tirne
or
electl.ic:lL lle€lr.ces.
Direct
measur.ernents
in
degrees recluir.e usiug an
external source, having
a
Irequency
that
is
360
times that of
ure
waveform
being
measured. as the
TIME
IINIT.
(This voltage is
ap_
plied at thc
EXT.
input connector.)
To make phase measurements the
instrunlent
is
set
Lrp
as follo\r,s:
1
FUNCTION SELECTOR on .I
ME
INTEIiVAT.
2.
TTiIGCER
INPUT on SEp.
3.
MANUAL GATE
c
tosed.
Connect
the
two
!va!.efor.nls
to tite
STOP and
START
TRICCER INPI-ITS,
set lDth
TRIrcER
LEVEL VOLTS
controls at appr-oxinlttely
zero, tnth
TRIGGEIi
SLOPE
IUany
time intert,al
measur.enlents
are possible with
Ure
Model 5228. the basic r.equil'cnient
l)eing an
elec-
trical
iutpulsc at the
l)eginDing and end
oJ
the
desired
time
intenal.
This impulse
may
be
genelated by
any
one
oi
a nurnber
of speciatizcd transclucels. swtches.
phototubes, etc.
Thc
Hewlett-Packard Jour.nal,
Vol.
i.
No.
1_2. is
devoted
t,,r
ltnle intcI-\al
meirsuren)ents
wlth the Model
5228.
It
discusses
a
ntilrker.generaror that
nlaY be
of
Ialue
when makjnF
tlnre
ijttcn.Jl
rncJsurentntrls.
Wl)Cll
rnlking tinte
inten'al
nleasurenlents
on
ii
.,ontpli.i.ttcd
wavelorm. the nlarker
will
be
helplul in setling
the
trigger leyel
coDtr.rls
correctlv. Contlct
the
Herviett_
Packar1l Company
iI
you
desire
any
lurther
cletails
on
time irlter1al iteasutements
or
Ure
n]arker generator.
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