Table of Contents
Advertisement
-\
Models 461Al462A
t.
MFasurF
rhF
di5rorrion al
po<rlron A.
g.
Measure the
distortion at position
B.
The
dil-
ferencebetween the two
distortion readings
should
be
5-
1r'
I9l9!!I4!5
11q143!q
49?4).
a.
Connect
RF Millivoltmeter
and
a 50
ohm load to
oUTPUT
of Model
461A.
b.
Rotate Model 461A GAIN
control
to
40
db.
c.
RF Millivoltmcter
should indicate less
than
4
millivolts.
5-12. LOT'
FREQUENCY
RESPONSE
CIIECK.
a.
Connect
lheModel46lAas
shown
in
Figue
5-3.
b.
Set
the attenuator
to
40 db and set the
461A
GAIN (DB) to
40
db.
c.
Adjust
the
frequenc
y
r
espons
e
test
set frequency
to
500 KHz and
adjust
its
output
for
an
indication
of
-5
db
on the
Rl
miliivoltm€ter.
d.
Adjrist the frequency response test set's
set
levol contlot
for
a
conv€nient
indication.
Reco.d the
sct level
indication-
e.
Change
the test set frequency
to
10 MHz
and
readjust
theamplitudefor ihe
same set
levelrecorded
l.
The
RF millivoltmeter indicaiion
shorild
not
change
by
more
than
+1 db.
g.
Repeat steps e
and
f
at
frequencies of
5
MHz
and
1
MHz.
h.
Use
an
enernal oscillator to drive
the lrequency
response t€st
s€t
at
1
I(Ilz,
and
adjust ihe
amplitude
for
the
set
level indication in
step
d.
j.
Connect
a
1ow
frequency voltmeter in
place
of
the
Rl
millivoltmeier.
The voltmeter should
read
-5
db +1
db.
Paragraphs
5-11
to
5-
13
5-13.
HIGH
FREQUENCY RESPONSE
CHECK
(461.{).
NOTE
Either Palagraph 5-13,
steps a
thru
m
(Fisae
5-4),
or
Pa.aslaph 5-22,
st€ps
a
thru i
(Fisure 5-8),
can be used
fo.
a.
Connect
Model
461A
as sh@n in Figrlre
5-4.
b.
Set System
Attenuator to
40 db.
c.
RoiateModel
461A GAIN (DB)
contror to
40
db.
d.
Adjust Siglral
Generator
lor
a
lrequency oi
10
MHz.
e.
Connect
Power Meter
to
OUTPUT
oI
Modet
4614
iposition A in Fisure
5-4).
i.
Adjust the
Si$al
Generator output
amplitude
for
2n
indication of -5
rlb
on
Pdver
M.t.r.
g.
Disconnect Signal
Generator
from Attenuator.
NOTE
Do
notdisturb
Signal
Generator
controls.
h.
Connect
Power Meter
to
OUTPUT
ol
Signal
Gene.ator; record Power Meter indication for
use
as
j.
Adjust sisnal generator to
20
MHz-
k.
Adjust
Siglal cenerator
ouiput
leveltothe level
recorded in
step
h.
m. Couect
PowerMeterto
Model
461A
OUTPUT.
Comect OUTPUT
of
Signal Generator
to
input
of
Slstem Attenuator.
n.
Power
Meier
should
indicate
5
db
+1 db.
o.
Repeat
steps
e
thru
o
at 50,
100
and
150
MHz.
SIGNAL
GENERATOR
6pvooer eosczo
@uooer
rrro
62nooer rera
WIDE
AANO AMPLIFIER
TH
ERi/I
ISTOR
@)uooee
+zoa
TYPE
,.N"
TO
BNC
AOAPTER
@rzso-oosz
ATTENUATOR
@uooer rsso
L-.j
PosrTloN
'8'
l
tiieso-oozt
o
lJ,-
t,s
ro)
|ooll
a'
oll
,"",'9",
Figure
5-4.
High
Frequency
Response Check
Setup
/-\
01358-2
Advertisement
Table of Contents
