HP 435B Service Manual

M odel 435 Β

Installation
2-1 .

INTRODUCTION

100 mW to 3
μ
W (+20 to-25 d Bm) and 10 μ W to 0 .3 nW
This section includes information on the initial

( - 20
to -65 dBm) . E ach scale listed indicates the
inspection, preparation for use, and storage and

maximum a nd minimum full scale m eter readings .
shipment instructions f or t he P ower Meter .
2-2 .

I N ITIA L I N S PE CTIO N
W A RN I N G
To a v o id h aza rd o u s e l ect ri ca l s h oc k , d o
n ot p e r fo rm el ect ri ca l tests w h e n t he r e
a
re s i g n s of s hip p in g da m age to anypo r -
t i on of t h e o u te r en c l osur e (cover s a nd
p a n e ls) .
Inspect the shipping container for damage . If t he
shipping container o r c ushioning m aterial is d am-
aged, i t should be k ept until t he contents of t he
shipment h ave b een c hecked for completeness and
t he instrument h as b een c hecked mechanically
a nd e lectrically . The contents of t he shipment
should beas shown in Figure 1-1 . Procedures f or
c hecking electrical performance are given in Sec-
tion IV . If t he contents are incomplete, if t here i s
m echanical damage or defect, or if t he instrument
does n ot p ass the electrical performance tests, no-
tify the n earest H ewlett-Packard o ffice . If t he
shipping container is d amaged, or t he cushioning
m aterial s hows signs of stress, n otify t he carrier
as well as the H ewlett-Packard o ffice . K eep t he
shipping m aterials f or t he carrier's inspection .
2-3 .

PREP A R ATIO N F O RU S E
2-4
.

M
eter Zeroing
W ith t he LINE switch set to OFF, the m
eter
ρο
_nt-
er s hould be p ositioned directly overzero . If neces-
sary, insert α screwdriver into the m echanical
Meter Zero control (beneath t
he
m eter) and
a
lign
t he p ointer w ith zero . B ack t he ad j ustment off
s lightly . The b acklash in t he control e nsures
against α m eter indication e rror caused
by j
arring
the instrument .
2-5 .

R ange Switc h
Scale Selection
SE CTIO
N ΙΙ
I N STA LL ATIO N
To select the correct RANGE switch knob assem-
bly scale (see Figure 2-1) :
α .

Unscrew t he outer (black) knobby t urning i t
counterclockwise . Then, r emove the outer knob .
b .

R emove the two scale rings .
c .

D etermine which o f t he 3 scales i s to be u sed .
d . Place the other scale ring on the knob
assembly .
e .

Place the selected ring on the knob assembly
with t he selected scale out .
£

Lineup the tabs of t he scale rings with t he
slot in t he knob assembly .
g . Hold the scale rings in place with your
fingers
. Thread t he outer knob onto the knob
assembly . Lightly
t ighten t he knob .
SCA
LE
B AS E
The RANGE
s
witch
has three scales on 2
r
emov-
able rings which correspond to the m easurement
capabilities of compatible p ower sensors . The
r ange scales are 3W to 0 .3 mW (+35 to -5 dBm),

Figure 2-1 . Changing R ange Switch Scale

HP 435B Specifications

General

Brand	HP
Model	435B
Category	Measuring Instruments
Language	English