Advertisement
"
,1.
'LEAKAGE CURRENT.
<When
back-biased
typica11~
less than,50J.t4 for
"A"
models and typically
'lesstlian
lQO
~A
for'
"B"lnod~ls
(see
Not?
4).
. '
. ' "
( .
. '," ; . "
, ' i
,
r-'~
,
I
;;
/ ,i
,
Tablei2. Performance Check Procedure '(1,'of3) ,,"
'\,),
.
1 ' 1 ' "
_<I
I
!, . •
,
,
.
,'I
'
,
,I
'
,
'
\
I
/
I :1
s :
Mddel 8730A
&
B
Series
!
,
II
.
,ii,
I ,
,
I
, i
'
"
,
,)
~
"
.
,I,
'
,.'
I
" j
ii,
"1
,
"
'-",,'
,','"
'? '
,
' , .,/
.
'
,'.
'/
,
I
Page 12",
v.'.
,
)
,
, l
,
' I
,/
•
DYN'AMIC
R~NGE
(dB)., .For
','A"
models (9NLY)at 35 dB across frequencyrange
,
'
,
.
,"
'.
,i:,
I
,
~'1
.'
\
,
,
, )
.
'.
lao.. .
'I
,
,
Voltmeter. used
_
PIN Mod Serial
No'~'_.,_.....;....
......
"
Measured de Voltage
L ;
_ _
TEST RESULTS (see Note 1),
,
'
'Date _.
-,-_ _
,
,
2.
. PROCEDURE
\'
\,"
"
I
a. Apply +20 voltsde
(re(eren~ed
to PIN Modu-.
lator ground)
to
the BlA,S inptit through
a
10Q
kn ...
'10% 1/4W
resistor.
I "
,
,
. b. Using a
de
voltmeter, 'measure voltage across
.'resistor. For "A" models less than 5V (less than
"
' I ,
,
,
'
lOV
for
"B"
models).
, c. If leakage!current' is excessive, the cause is
., .either a defective BIAS input filter (see paragraph .
entitled Bias Input Check and Repair) or internal
·dam~e.
' ,
" ,
I
)
,
PROCEDURE
,
',,
I
a.' With, 5 "Vdc appliedto BIA,S input, attach
a80-dB attenuator to PIN Modulator RF output.
,I
\
,
I
b. Using a Power Meter, adjust RF power, source
fot a
near
full scale reference.
c.
Turn off
Power
Supply and reconnect to
PIN
Modulator
as
shown 'on next page. Adjust Power
Supply for rated
current
(stamped on label, .
attached to underside of PIN Modulator).
, d. Remove. "30-dBattenuator and' measure at-
•tenuated RF power level: it should be at least 5
dB lower than original reference setting,
TEST RESULTS (see Note 1)
Date. . . . . ; . . ,
,
_
PIN Mod Serial(No.
..;...;._~----_·
,
., Attenuation
~------
Frequ~ncy,_-----------
Power
Meter
used -:--
_
Measure forward
I
bias current
-----
a,
'.
3.
DYNAMIC RANGE (dB). ,For"B" models (ONLY) 'at least' 80
dB~
,\
-.'.
I
"
Date
~-~-----
PIN Mod
Serial No.
_
PROCEDURE
.'. a.
Set Spectrum' Analyzer INrUT ATTENUA- '
TOR to 60 dB and connect test equipment (N01'i
INCLUDING THE DC POWER
SUPPLY OR
DC
AMMETER)
'~
shown beneath step,c.
t-----------:---------.....;...----r------~----./~
---------:-----1
TEST RESULTS
(self~,INotel)
)
~'
.
"
,
.,
"
",-
"
J
,
,
.,
I
.
Frequency
- -
_
,
Attenuation
- - -
_
Measured forward bias 'circuit
_
, Atteunator used
_
"
.~.,',\
For testing the 8733B, 8734B,
or
8735B
'a TWT,Amplifier must
beused as
part of
the
RF
Source. Be
earefut not
to apply
, 'more than
1
Wof
R~i,)pwer:to
PIN.
Modulator,
•.:
.
'
,
i
, I
\
II'
I
\
•
b.
Apply +5V de (referenced in PIN Modu..
Jatar
ground) to BIAS input.
'
, ,\ "
-,
1-)
'r,
\'
,
'
.'--~_._.,-
Advertisement
