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Pan$aphs
5-14
to
b-16
5-14.
PULSE
RESPONSE
CHECK
(462A).
a-
ConDect the
Model462.{ as
shown
in
Fieure
5_5.
b.
Set
attenuator
to
S0
db.
c.
set
462A
GAIN (DB)
cont.ot
ro
40
db.
_d.
Setuptheputse
genentorfo!
a30
nsec
negative
pulse
at
a
repetition Iatebetweeno.
t
MHz and
I
MEz.
n.-
Connect rhe
osri
os,.ope
and
50
A
loadroposi_
,ion
B
3nd
ser
rhF
obcr
os.opF
ro
ctispl?\
one 30
ns€c
pulsc.
Obser\e
rhe snape
ot rte input p;tsF.
t.
ConnFcr
rhe oscilloscope
to
posir:on
A. tle
drsplared pJI6e .hould na\e iha samp suoe
as
rhe
pulsF ubscrvcd
in
step
..
The rise
a1d
taLl
rimee
should oe
less lhan 4
nsp,.
FisJrp
5_t0
shuss
rhe
rehtive
urveshaoes.
5-15. OUTPUT CHECK
(462A).
a.
Pedorm procedue
described
inparagaph
b_4,
--.b.
Comec( O6cittoscope (wrrh 50 ohm load)
to
OUTPUT
of
Sysrem Anenuator.
tposnron
B
in
FiC_
ue
5-5)
c.
Adjust Amplitude
of pulse
Generator
tor
an
0.01 volt peak-to-peak
output.
d.
coDe{r oulplr ot
Syslem Atrenuaror
ro
tNpUT
ot Model
462A
. e.
ConncctOs.iltoscoparoOUTpUTot
Modcl462A.
Amp,rrude
ot
putsF
obsert€d
on
oscilloscope
shouid
bc
I
loll
pFak-ro-ppat{ +lodo, and
rhe
pul6e shoutd
be
invcrtc.i
Moders 461A/462A
5-16-
OTTRLOAD
RECOVERY CHECK
(461A1462A).
-_:- -illl."",
a
purse eereruror
r_hp_
Modpr
212A)
ano
anos.
toscopea\shown
in
oosi,ionA jn
Fidure
J_6.
NOTE
Keep
all
leads short
as
possible.
b.
Set
pulse leneth
to
1 microsecond. Adjust
ampli'udp
oj
Pulse
ccnpra,or for
a
1.0
v
pcak_to_peak
dlsF
c.
Renovc50ohmtoadandcoMect
oulput
oI
putse
cenerator
to Model
461A
INPUT.
d.
Connect
a
50
ohm
load
termination
anrr
an
os-
cillo_s(oDcro[4^oel
461A
ouTpuT
tposirion
B
jn
Fie_
rre
5-6i
e.
The baselin€
should
be
restored within
l0%
in
less than 1 microsecond atter the
trailing
edge of
PUI,SF]
5-r7. ?uLsE
pECAY
CHECK
(462A).
a.
connecra
50
ohm load
across
outpur
ot
a
pulse
or
souare
wrve
cpnFrar or
such as
I
hF
_hp_ Modet
2t
1A.
b.
Aqjusr Pulsc cenFr.lor
for
a
30
microseconcl
purse
withamptrrudetess
rhan
0.01
voJr
peak_to_pFal.
-
c.
Re.nove
rhe
50
ohm
load
trom oupu, of
putse
Generator
-- d.
Connectoutput
of put6e C€nerator
to
INpUT of
Model462A.
e.
Rotat€ Model 462A GAIN
conirol to
40 db.
Y
ile
a.n
o
@uooer
rsso
@uooer
rese
@ztsa
--!
L
lr
r
LERMnaroN
@,*^
5-4
Fi$re 5-5.
Pulse
Response
Check
Setup
01358-2
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