EasyManua.ls Logo

HP 416A - Page 51

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...
Substituting
app
r
oximate
valu
e
s,
F
3
may
have
typical
valu
e
of:
(.
2)
(.1)
(O.
1)
3
E i : 2 x 10- S
Ei
At
Reflected
Detector
-
Three
spurious
signals
of
co
nsequence
also
can
arrive
at
the
reverse
detector.
(Approximate
values
given
below
are
referred
to
the
r£
'
voltage
in
the
main
guide.
}
Spurious
Signal
R
1
-
This
error
signal
arrives
at
the
reverse
detector
because
of
the
imperfect
direct
ivi
ty
of
the
reverse
(r
eflected)
di
recti
onal
coupler.
A
sample
of
the
voltage
component
of
the
in
c
ident
wave
(E
1
}
is
couple
d
(ar}
into
the
secondary
arm
of
the
rever
se
di
rec
tional
coupler.
Because
of
the
imperfect
directivity
(dr}
of
the
c
ouple
r,
some
(a
small
part}
of
the
incident
wave
will
reach
the
reverse
detector.
The
value
of
R
1
i
·
s
~
R - d a E
, 1 -
r r i
where
dr
=
wo
rst
poss
i
bl
e
dire
ctiv
ity
of
reve
r
se
coupler
(.
01)
::
coupling
c
oeffi
c
ient
of
reverse
{10 db}
cou
pler
( .
316)
Substituting
app
roximate
values,
R
1
may
have
a
typical
value
of:
(.
01)
(.
316)
Ei
-
:;-
3 x
10-
3
Ei
Spurious
Signa
l
R2
-
This
error
signal
re
sults
from
discontinuities
in
the
system,
primarily
at
the
flange
joint
between
forward
and
reverse
coupler
.
The
voltage
component
of
the
refl
e
cte
d
wave
[{
pL
) (
Ei)
],
because
of
d is
conti
nuities,
is
reflected
(Pc}
ba
c k
to
the
l
oad
,
re
-reflecte
d ( p L )
by
the
loa
d ,
and
coupled
(
ar)
by
the
reflected
dire
cti
ona
l
coupler
to
the
re
ve
r s e
detector.
The
value
of
Rz
is:
R2
= Pc
E .
l
Assum
i
ng
that
dis
co
ntin
uit
ies
ma[
have
a
re~l
ection
coefficient
of
. 01,
R
2
may
have
a
typi
c al
value
of:
{. 0
1}
PL
(.
316)
Ei;
3 x
10-3
PL2
Ei
Spu
rious
Signal
R 3 -
This
error
signal
re
sults
from
reflection
from
the
reverse
(reflected)
detecto
r.
The
voltage
co
mponent
of
the
reflected
wave
[(pL)
(Ei}]
is
c
oupl
e d
(ar)
by
th
e
reflected
d
irecti
onal
c
oup
ler
to
the
detecto
r,
and
the
reflection
(pd)
from
the
d
etector
is
couple
d (a
r)
bac
k
through
the
coupler
to
the
load
,
re-reflected
(p.L}
by
the
load,
and
coupl
ed
(ar)
again
by
the
coupler
to
the
reverse
detector.
\
whe
re
Pd
=
re
fle
ctio
n
coefficient
of
reverse
d
etect
o r
(.
2)

Related product manuals