HP 5383A

5-5 . AD JU ST MEN TS
5-6 .

The co un ter r eq u i r es two ci
r
cuit a
dju stme n ts : T h e B alance d I n pu t Am p lifie r a dj ustme n t,
and t h e Time B ase
Oscillato r a dj ustme n t . P e r fo r m these a dju stme
n
ts acco
rd i ng to t he followi n g
p r oce dur es :
5-7 .

Balanced Inpu t A m p
lifie r
5-8 . The in pu t am
p lifie r p ositive a nd n egative t r igge r i n g t hres h ol d s a
r
e a
dj
uste
d wit h t h e
followi ng r ecomme nd ed test e qu ipme n t :
HP 180 Α Oscillosco pe
HP 1801 Α Oscillosco pe P
l
u g-i
n
HP 651 Β Test Oscillato
r
5-9 .

P e r fo r m t he a dju stme
n
t as
follows :
α .

R emove t
h
e to p
a nd bottom cove r s f r om t h e co un te r as d escribe d in, P a
r
ag r ap h 5-16 .
Obse r ve W A RN I N G n ote .
b .

Con n ect t h e oscillosco pe to
Α 1 ΤΡ 1 of t he M ain B oa rd Assembly .
ε .

Co nn ect t h e Test
Oscillato r 50 O hm o u tp u ttot h e f r ont p anel 50 Ω /1 ΜΩ i npu t con n ecto r
of t h e coun
te r . Set t h e co un te r I NPU T switc h to 50 Ω Χ 1 .
d .

Set t he Test Oscillato r fo r α 1 MH z o u t pu t at α
15 m V level .
e .

Co nn ect AC powe
r
to t
h
e co
un
te
r . Observe W A RN I NG n ote . Set t he co un ter L I NE
switc h to ON .
f .

A dju st t h e oscilloscope sweep timeve rn ie r so t h at one cycle ta k es up t he complete
wid
t
h
of t h e oscillosco p e d is p lay .
9
. On t he counte r , a dju st p
otentiomete r A1 R 32 u ntil t h e sig n al on t h e oscilloscope s h ows α
50% d uty cycle .
h .

R e m ove test e qu i p me n t, ac powe r fro m t h e coun te r , a nd install t he top a nd b ottom
counte r cove r s pe r P a r ag r aph 5-16 .
5-10 .

Sta nd a rd Time B ase Oscillato r A dju stme n t
5-11 .

T he sta nd a rd time b ase oscillato r is a dju ste
d
wit h t
h e followi n g test e qu i p ment :
HP 5328
Α
Un
ive r
sal Co un te
r wit h
O p
tio n 10
HP 11048C o
r
e q
uivalent
5011
Feed t hru conn ecto r
O
R
HP 5345 Α E lect r o n ic Co un te r
M od el 5383 Α
M ai
n
te
n
a
n
ce