EasyManua.ls Logo

HP 416A - Page 61

HP 416A
109 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
GENERAL A
PP
LICATIONS
Requirements
The
ratio
meter
may
be
used
to
make
measurements
of
the
ratio
of
any
two
parameters
when
certain
conditions
are
fulfilled,
a.
The
two
voltage
waveforms
,
for
which
the
ratio
meter
will
form
the
ratio,
must
be
in
phase
and
must
ha
v e
1000
-
cycle
components.
b.
The
rms
voltage
of
the
1,
000
-
cycle
components
must
be
within
certain
voltage
ranges.
(
1)
The
incident
channel
input
rms
voltage
range
is
3
mv
to
100
mv
with
the
EXCESS
COUPLER
LOSS
switch
in
the
0
DB
position.
When
this
switch
is
in
the
10
DB
position,
the
range
is
O. 3 m v
to
10
m v .
(2)
The
reflected
channel
i
nput
rms
v
oltage
ran
ge
is
from
about
0.
3
to
100
m
v.
NOTE
:
The
meter
is
calibrated
to
read
the
square
root
of
the
_
actual
input
v
oltage
ratio
.
This
fact
must
be
kept
in
mirid
when
linear
trans
d
ucers
are
used.
Exam
p
le
(Fig.
17)
As
an
example
,
consider
the
measurement
of
the
transfer
function
of
a
radio
-
frequency
amplifier
where
the
a v
ailable
signal
g
enerator
has
an
out-
put
that
is
not
flat
with
frequency
.
The
ratio
to
be
measured
is
the
output
voltage
over
the
input
volta
g
e.
Because
the
Model
416A
is
designed
so
that
accurate
ratio
readings
may
be
obta
i
ned
regardless
of
signal
source
ampli-
tude
variations
which
may
occur
during
measurement
, a
measurement
system
using
the
Model
416A
a v
oids
the
necessity
for
an
rf
si
g
nal
g
enerator
which
has
an
output
that
is
independent
of
frequency
.
The
procedure
for
set
ting
up
and
operatin
g a
typical
measurement
system
of
this
type
is
described
below.
a.
Set
up
the
signal
generator
so
that
the
s
ig
nal
is
modulated
at
1000
cps.
b.
Connect
the
g
enerator
output
to
the
amplifier
i
nput
through
an
attenuator
of
such
range
that
the
signal
into
the
amplifier
can
be
attenuated
suffic
i
ently
to
compensate
for
the
gain
of
the
am-
plifier
.
This
attenuation
is
ne
c
essary
durin
g
calibration
(see
step
f,
below).
c.
Plug
the
Model
416A
into
a
suitable
power
source
and
turn
the
power
switch
to
ON.
Set
the
EXCESS
COUPLER
LOSS
switch
at
0
DB
,
and
the
RANGE
switch
at
0
DB
100%
.
-
45
-
,j:
,...
0
,;:t
c
c
,j:
I
,...
..
I-
C
--...
r-
0
--...
IJ
IJ

Related product manuals