HP 435B Service Manual

Ad j ustments

M odel 435 Β
5-9 . P O WERME T ER AD JU ST
MEN TS WIT H CA L I BR ATO R (Cont' d )
AD JU ST MEN TS
3 .
Set t h e R a n ge Ca libr ato r RAN GE s wi tc h to
1 mW, FUN C TI O N s wi tc h to
S TANDBY, and POLARITY s witch to N ORMAL
.
4 .

Set the DVM RANGE s witch to Vdc .
5 .

R emove the right side cover o f t he P ower Meter,
connectthe equipment as shown
in Figure 5-5 and set the LINE s witch to
ON
.
ΝΟΤΕ
B efo r e p r oceedin gw i t h t h e a d ju st m
e n t, co nn ect t h e in p u t of α
f r e qu e n c y co un te r (s u c h as t he HP
5314 Α ) to ΤΡ 7 o r ΤΡ 8 a nd
v e ri fy t h at t h e mul t ivi b
r
ato
r f r e qu e n c y i s 220 ±12 H z . I f t h e
f r e qu e n c y i s in co rr ect,
pe r fo rm t h e Mul t ivi b r ato r A d ju st m e n t
(5-
7
) .
6 .

Center t he P ower Meter Balance
control, A 4R46 .
7 .

Ad j ust A 4R32 D C Offset control
for
α
DVM reading of 0 ±0 .2 mVdc .
8 .

Set the P ower Meter RANGE s
witch 5 turns from t he fully ccw p osition .
9 . Set the R ange Calibrator
FUNCTION s witch to CALIBRATE .
10 . Ad j ust the P ower Meter
front p anel C AL ADJ control for α DVM reading
of 1000
±1 mVdc .
11 . Ad j ust the M eter
control A4R35 f or α full-scale m eter reading .
12 . Set the R ange
Calibrator FUNCTION switch to STANDBY .
13 . Set the P ower
Meter RANGE s witch fully ccw, press and hold t he
ZERO switch,
and a d j ust
A 4R42 Auto Z ero Offset control for α DVM reading of 0 ±1
mVdc .
14 . Set the P
ower Meter RANGE switch 5 turns from t he
fully ccw p osition ; set the
R ange
Calibrator's FUNCTION s witch to CALIBRATE .
15 . Press
and hold t he P ower Meter ZERO switch a
nd
a
d j ust the A 4R46 B alance
control for α DVM reading of 961 ±3 mVdc .

HP 435B Specifications

General

Brand	HP
Model	435B
Category	Measuring Instruments
Language	English