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HP 5384A Service Manual

HP 5384A
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HP
5384A and HP 5385A
Service
A 1
U4t3!
0.01 /JS/div.
A1U5A
i
2~
0.02 ,us/div.
0.1V/div. ac
coupled
0.5V/div.
ac
coupled
de
level is
approximately
3.6V de level is
approximately
3.8V
A 1U6(
11
l 0.02
J.LS/div.
0.2V/div.
ac
coupled
de level
is
approximately
2.8V
figure
8-46.
HP
5384A
Channel
B
Waveforms
(Continued)
8-300. To
troubleshoot
the
HP 538SA
Channel
B
input
amplifier,
first
check
for
a
blown
INPUT
fuse.
Refer
to
figure
2-5.
If
the
fuse
is
blown,
replace
it
and
apply
a 100
MHz
signal at
25
mY
rms
(70
mV
p-to-p)
to
the
Channel
B
input
BNC. Press
the
FREQ B key.
Referring
to
figure
5-3,
check
that
the
proper
wave-
form
exists at A 1 U6A
i11
).
If
the
proper
signa I
is
not
present,
probe
the
followig
list
of
nodes. (
Follow
the
sequence
shown
in
the
list
or
or
use
the
half-splitting
technique
and
begin
with
A 1U19(10).) Refer
to
Figure
B-47, HP 5385A
Channel
B
Waveforms,
for
the
proper
signal
you
should
observe
at each
node.
CIRCUIT NODE
A1CR25 icathode)
A 1 L
10
(lead nearest
front
panel
)
A1L12 (lead nearest
front
panel)
A1U19i101
A1U19(4)
A1U6At111
CIRCUITRY
Channel B
limiter
output
Channel B
1st
gain stage
output
Channel B 2nd gain stage
output
Channel B divide-by-256
frequency
divider
input
Channel B divide-by-256
frequency
divider
output
Channel B
to
MRC
output
8-39

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HP 5384A Specifications

General IconGeneral
BrandHP
Model5384A
CategoryCash Counter
LanguageEnglish

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