HP 5383A

3-1,
I N TR OD
UCTIO
N
3-2
.

Th
is section
co n tai n s d esc r i p tions of t he con trols, co nn ecto r s a n d i nd icato r s, meas ur e-
me n t
tec hn i qu es,
a nd ope
r
ato
r
c
h
ec
k
s .
3-3
. CO
N TR O L S, CO
NNE CTO R S AN D I N DICATO R S
3-4
.

F
ig ur es 3-1 a nd 3-2
d
esc
r i be t h
e o p
e r atio n of
t
h
e 5383
Α co n t r ols
a
nd t h
e
f
un ctio n of
t h e
va rio u s co nn ecto
r s and i nd icato r s . The followi n g p arag r a ph s also pr ovi de op
erati
ng
g u ideli n es an
d b r ief ope r ato r main te na n ce pr oce dur es for t h e f r equen cy coun te r .
3-5 .
M EAS UREMEN
T T E C HN IQ U ES
S E CTIO N III
O PER ATIO N
3-6 .

N oise
r idi ng on t h e in pu t sig n al ca n ca u se e rr o n eo u s o r un stable f r
eq
ue n cy
meas
ur
e-
m e
n
ts
. U sing t h e i n ter n al Χ 10 atten u ato r , o r exte rn al attenuato r s mi n imizes t h is pr oblem .
Pr op er selectio n of t
h
e
i npu
t
imp
e
d
a
n
ce also allows fo r stable a nd acc ur ate f r equ ency mea-
s ur eme n ts . Wh e
n
t
he r e is α d iffe r e n ce betwee n t h
e
sig n
al so
ur
ce
i mp
e
d
a
n
ce a
nd
t h e co un te r
in pu t impe
d
a
n
ce,
r i n gi ng may appea r
on
t h
e
sig n
al
.
T
h is r i n gi n g
co
u l d i n
te
r
fe r e wit h , a nd
d eg r ade t
h
e capab
ility of t he cou n te r .

Kn owle d ge of t h
e
sig n
al
so ur
ce
ci r
c
u
it c
h
a
r
acte r istics
a nd selectio n of com p atible 5383 Α i npu t impe d a n ces and atte n uatio n pe r mits
proper
mea-
su r ements . Table 3-1 (page 3-2) pr ovides some s u ggeste d meas ur eme n t tec hn i qu es to h elp
t
h
e u se
r
o b tai n m axim
u m u
se of t
h
e
f r
eque
n
cy co un te
r .
3-7
.

R
atio
M
easu
r eme n ts (Sta nda rd
Co
un te r
Only)
3-8 .

T he sta nd a rd coun te r will meas ur e t he r atio betwee n t he f r e qu e n cies of two signals if o ne
of t he sig nals is a pp lie d to t he r ea r -pa n el OSCI LL ATO R - ΕΧΤ IN co nn ecto r a nd t he ot he r sig n al is
app lie d
to t
h
e
f
r o nt- p anel I NPU T co nn ecto r . (T he O p tio n 001 co un ter
d
oes
n
ot
h
avean exte
rn
al
oscillato r i npu t
co
nn ecto r .) B
e su
r
eto
r
efe
r to Ta
b le
1-2
fo
r sig n
al
level a nd f r
equ
ency limits . T h e
d is p laye d val u e is i n un its w h ic h r
e pr
esen t t h e r atio of one frequency to t he ot he r as s h own by t he
followi
ng fo r m u la :
f r equ ency at f r ont p a n el I NPU
T

__

Dis p lay V
al
ue
fre q at r ea r p a n el OSCI LL ATO R - ΕΧΤ
IN

Χ
10 if GAT E TIME is As
w h e r e Χ =

10 if GAT E TIME is is
J 10 7 if GAT E TIME is 10s
3-9 .

N ote t h at in
t
h
e above fo
r
m u la t he te r
m "
Χ " c
h
a n ges by
α facto r of 10 7 w hen α 10s GAT E
TIME is
set . The GAT E TIME is t h
e same
w he n 1s a nd 1s selectio n s a r e ma de . N ote, also, t h at
act
u al
meas ur eme n t time inc r eases as t h e f r e qu ency app lie d to t he OSCI LL ATO R - ΕΧΤ IN
co
nn ecto r
dec r eases . 1f t h e f r equen cy a pp lie d to t h e OSCI LL ATO R - ΕΧΤ IN co n necto r is 1 MHz,
fo r
example,
a nd GAT E TIME is set to 1s, act u al meas ur eme n t time will be 10 second s .
M
o d el 5383 Α
Ope r atio n