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r
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i.
I'
I
2.0
30,
20
:l.5
1.6:
2.2
,
1,
+20,
-10
100.
W/G
7'
'30
20
1.7
2.0
1
2.5
.1.1
.:
+20,~10
300
I
~
\
:.
'(, ; ,
'\
\'
1.8,
from
1.8
to 4.0 GHz
2.0, from 4.0 to 4.5 GHz
Model
8730A&
B Series
.
:::1,';,
t,
.',
I'"
1.\
,
",',
II
+20,,-10'
1,00
9.
i
8734~,
. "
87348
,".'
8735A
87'35,IS'
7.0-12.4
\7.0-.12.4 8:2-12.4," 8.2-12.4
35
I
;,;?~O
.35
80
<4..
(},
< 5.0 <4.0 <5.0
I
30 ' 30:
20 20
\ "
La
2.0
I I
·~.O
2.2
1 1
N
8,
N
8'
N
8
3.5 2.5
a.5
1.6
1.1
I
1.6
,',
, ,
.:.
I
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I
-
I
,.'1'1'://
+20,~10
.+20,-10
+20,-10
300 100 300
8
N
2.5
~.1
8733A
87~3B
3
..
7-8.:1 ,,3;7-8.3
35 . 80
<2.0' < 3.0
30 30
20"
20 '
1.8 2.0
a.o
2.2
j,l'
~
\ 1
Nlj
5.5
2.5
"
'87328
1.8~4.5
I
,80
2
<3.5
30
20'
"
1.6
4
,2.0
1
8732A
1.8":4.5
35
<
2.0,
40
30
1.5
1.8
9
1,
, Table 1. .Speciftcations
'-',. '
5"
"I
"
•.
,
I"
Negative.
voltage,applieli forwardbias to diodes
,6. At
attenuation levels
01;
10 dB or more, ' "
7.
Fit~
1 x 0:5 inches
(WFL
90)
waveS:;..tid~',',
8. Standard female type N " ,
30
20
1.6
'2.0
'
1
87318
o..8~,2.4
80,
'
, ,
<2.0,
, .
\'
,,8731A
I
+5 Vdc bias
1.
Frequency
Range
(GH
z,)
0.8-2.4
, )
0111:1 mic: Range
(dB)
"
3~
,
'.,
.'
1
Mh"
InserttonLoss
(dB)
<1.5
Typical
Rise
Time
(n8)3 40,
Typical
DecayTi~'~
(DI)S ; 30
SWR, Minimum:,Atte auatton l . 1.5
I
SWP.,
Maximum Atten iatlon t..8
" '
Maximum'Input
Power,
1 "
'~:::'~:~~~~::~:I~:s
;11~
+2;O~1
0
+2~~~1
O+2~~~
o
+2~'O-OI
0
Resistance
(ohms)6
'
pu\
"
,
'i
8 ' 8 8
R,
F connector.
Type'
"
,\~N
I,
N N
Weig~t{lbS~
3 5.5 a
! ,(kg) 1.4 0 2.5' I 1.4
Dimenstons
'UU8trated
in Figure 1. '
,\
'
2.
<4.0
dB, 4.0 to
4.Ej
GHz \ .,
a.Driven
by HP 8403A Modul \tor
, , "
4.'
210,
from
4.0
to 4;5 GHz "
"
,\P~e4
0,
..
" I
.'
.
, "--,'.
1'::,.,;,'/,/',
,'"
,,'
•
'.
I
" ,
'\ ,
,
·f.
!
I,
-t--
.........
_~----_.'----
-,----'
2,0
,
,4.0·
.
6.0,
12.4
. FREQUENCY· (GH1)
".
01,0
',1
"j"
",f,
/ I
.
F;gure,'3.
Typical Insertion Loss
Curves
".
•
'I"
.........
'" , ,
CD
3
-,-,
...
~---
-'-,,----~
.•-_:..-
.:-.
_."'~"--'
-,
-".,
...
'0'
"
.......
'I
" I"
(I)
, )'
t/)
"
o "
..J'
'
.
2----,,-~
~
, ,
c
-,I
....
'
Il:
~
8732B~.
~ I
I" •
I '
1
dB'irripro.~ement
in
insertion.loss over zero bias.
A typical plot.
of
the
maximum values
of
minimum'
insertion 'loss is shown in Figure 3. Note: a.typical
, plot
fcir
the
"A'" models would be
the
same except '
I . : . .
that
maximum losses are less,
...
, '
'.'
,'.:'
'.'
The
attenuation
increases with forward
bioi
cur-
rent
almost linearly in dBuntil
diode
saturation
co-
curs. The
attenuation,
sensitivity varies
from
unit
to
unit
but
the
sensitiV',ity of. 'a 'given unit
is
predict-
able, Therefore, .intermediete values of' attenuation
can
be
derived
once
,the
current
values,
for
t, low
. .and high
attenuation
are 'established, The range
~f
expected
sensitivities
is
shown
as
the
shaded areas
• I _, I •
\'
"
currents
will',
flow
down
the
'~ransmissibn
path
be-
cause";
diode resistance
camp
ired
to
the
50-ohm
path
impedance
is
negligible.
, ,
~
"
J
I
\
',',.' .\'
>+:i:,1('
~~_
..
Lk
,',
- Figure 2. Simplified
Block
\?iagram
~.
' I
of
PIN
Modulator \:
, .
".'\
I:, :
~IASING
, •
.'
'"
'I.'
,:!,
:0 "
Each individual PIN Modulator
has'
label
attached
to
the
'underside
of
its casting body
Thi's
label has
'a,
'dc
bias currentvalue stampedjonto:
it.
This
, stamped current,
is'
the'
forward-blas
current
re-
quiredto produce rated" RF attenua ion across
the
'"
, frequency
band,
For
"A"
models,
the
.bias
current
I •
. for atleast 35 dB is typically
3~5
to'
milliamperea'
(about
...:.0.7
volts 'de
at
.the BIAS
in
ut),
For
'''B''
i ,
)models;
the
bias current for
at,:le~st8(),
dB
istypi-
cally 6 to 7 milliamperes
(about
"--0.1'
volts de
at
.
the,
BIAS
input).
~or
applications. W iere a .mini-
. ',l,nup} insertion loss is
imporl~nt,
a
re
rerse
bias
of
about
+5.'to
7(.vo~tsd~may
be applied, 0
the
BIAS'
,
,in~ut.
,R~verse"biaSin~can,result
jn
'~s
much
as a
I '
I
, .
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