HP 435B - Page 41

Ad j u st m e n ts

M o d e l 435 Β
A 4 R 12, R 16
A 4 R 66
A 4 VR 1, V R 2
Ta b le 5-1
. F acto r y Selecte d Com p onents
B asis ο ( Selection
A 3 R 5
i
s se l ecte d f o
r
α p
owe r refer e n ce o u t pu t o f 1 m W
(in to 50 Ω )
if
t hi s va lu e
i
s
ou ts id e t h e ad j u st m e n t r ange
o f LEVEL ADJ A 3 R 4 .
See Mul ti vibr ato r Ad j
u
st
m e n t (p a r ag r a ph 5-7) .
Α
41112 a nd R 16 a
r e se l ecte d f o r co rr ect z er o ca rry ov er
b etwee
n r a n ges . See Z er o Ca rry ov er T est (p a r ag r a ph
4-6) fo
r t h
e
limi ts fo r eac h r a n ge .
A 4 R
66
i s se
l
ecte
d fo r α full -sca l e r ea din g (100 m W)
wi t h an acc
ur ate 10 m W inpu t a fte r co mpl et in g P o w er
M
ete r Ad j
u
st
m en ts w i t hCa libr ato r (see pa r ag r a ph 5-
9) . H ew l ett- P ac
k
a
rd r eco mm e nd s u s in g α M od e l
11683 Α Ca libr
ato r to
ac
hi e v e t h e n ee d e d acc ur ac y f o r
se l ect in g t
hi
s
r es i sto r . Th e DVM r ea din g at t h e P o w e
r
M ete
r
's RECO
RDEROUTPUT will b e 1000 ±3 mVd c
wi t h t
h
e cor
r
ect
res i sto r in pl ace .
A 4
VR
1 a nd VR 2 a re se l ecte d to achi e v e acc ur ac y on
t h e to p two r an ges w h e n t h e acc urac y on ot h e
r r
a
n ges
i s
within
specifications . See Instrumentation
Acc ur ac y T est w i t hCa li b r ato r (p a r ag r a ph 4-7)
for t h e
limi ts f o r eac h r an ge .
Service
S h eet
5
2