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M
odel 435 Β
Installation
2-1 .
INTRODUCTION
100 mW to 3 μ W (+20 to-25 d Bm) and 10 μW 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 and minimum full scale meter 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 void haza rd ous elect rical
s
h ock, do
n
ot
p
erform electrical tests wh en
t
her e
a
re signs ofshipping damage to any po r-
tion of the outer enclosure (covers and
panels) .
Inspect the shipping container for damage . If
t
he
shipping container or cushioning material is dam-
aged,
i
t should be
k
ept until
t
he contents of the
shipment have been checked for completeness and
t
he instrument
h
as been checked mechanically
and
e
lectrically . The contents of the shipment
should be as shown in Figure 1-1 . Procedures
f
or
checking electrical performance are given in Sec-
tion IV. If
t
he contents are incomplete, if
t
here
i
s
mechanical damage or defect, or if
t
he instrument
does not pass the electrical performance tests, no-
tify the nearest
H
ewlett-Packard office. If
t
he
shipping container is damaged, or
t
he cushioning
material shows signs of stress, n otify
t
he carrier
as well as the
H
ewlett-Packard office.
K
eep the
shipping materials
f
or the carrier's inspection.
2-3 .
PREP
A
R
ATIO
N F
O
R U
S
E
2-4 .
M eter Zeroing
With
t
he LINE switch set to OFF, the m eter ρο _nt-
er should be positioned directly over zero . If neces-
sary, insert α screwdriver into the mechanical
Meter Zero control (beneath
t
he meter) and a lign
t
he pointer with zero.
B
ack
t
he ad
j
ustment off
slightly . The backlash in
t
he control ensures
against α meter indication error 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) knob by t urning
i
t
counterclockwise. Then,
r
emove the outer knob.
b .
R
emove the two scale rings.
c .
D etermine which of
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 the selected scale out.
£
Line up the tabs of the 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 o nto 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 measurement
capabilities of compatible power sensors . The
r
ange scales are 3W to 0.3 mW (+35 to -5 dBm),
Figure 2-1 . Changing
R
ange Switch Scale
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