HP 435B - Page 73

M o d
e l 435 Β
S ERV IC E S HEE T 1
(Cont'd)

M
iscellaneous
V o l tages at
ΤΡ 4 5 6 a nd 12 are co rr ect
as s h ow n
,,
f or full -sca l e
m ete r readings on a ny r an
ge .
ACAm p lifiers
If t h e w a v ef o
rm a nd /o r vo l tage at ΤΡ
1
i
s in co r-

Wit
hα full sca l
e
inpu
t, on 1 mW r an geo nly,
pr ess-
r ect, i t mu st b
e d ete rmin e d if t h e c ir c ui
t m a lfun c-
in g t h e fr o n t p an
e
l
ZER O s wi tc h s h ould pr
o du ce α
ti o n i s in t h e P o
w e r M ete r , p o w e r se n so r
o r ca bl e .

mete r readin g o f
a bo u t 0 .96 . If t h e r eadin g i
s inco r-
S ub st i t u t i o n w ill
qui c kly i so l ate t h e d ef
ect iv e in-

rect, r e fer to
Sect
i
o n V a nd pe rf o rm t h
e ad j u st-
st rum e n t . If α
s p a
r
e ca bl e a nd po w er
se n so r o r

me
n ts . If t h epr
o bl e m st ill exi sts, r e fer to Au
to Z e ro
r an ge ca libr
ato
r
i s n ot av a il a bl e, r efe r
to t h e t rou -

ci r c ui t tr o ubl
es
h
oot in g on Ser vi ce Sh eet
3 .
bl es h oot in g inf
o rm at i o n fo r t h e Fir st
Amplifie r on

Α n o i se pr
o bl e m evid e n t as m ete r vibr
at i o n m a y
Se rvi ce Sh eet
2 . Also, c h ec k t h e mul t ivibr
ato r ou t-

b e due to d
e
f
ect iv e co mp o n e n ts illu st r
ate d on Se r -
pu t ( ΤΡ 7 a nd
ΤΡ 8) o f t h e P o w er M ete r .

vi ce S h eets
2, 3, o r 4 .