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HP 5245L Service Manual page 127

Electronic counter
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Section
VI
2Y/cm,
1
ps/cm
2Y/cm,.5ps/cm
5Y
/cm,
50
ms/cm
LY
/cm,
50
ms/cm
lY
/cm,
1
lt
s/crn
.2Y/cm,
.1 lts/cm
2Y
/cm,
1
ps/cnr
See
Paragraph
6-34
2Y/cm,
.
5
ms/cm
Attempt
to
complete
period
aver-
I
Self
Check
e Self Check
Attempt
to
com-
plete
Frequency
SeIf
Check
Self
Check
OK
SeIf
Check
in
some
positions
only
5Y
/cm,
1
ps/cm
See
Table
Period
SeIf Check
(cont'd
from
p.
6-11)
SeIf Check
in
some
positions
only
I
lsoo Table
G-B
r'"
Check Sample
Trigger
Amplifier
A22Q10
Frequency
SeIf Check
lr
@
igure
7-
19
Check signal
at
422(6)
Figure
?-
19
Signal weak
or
absent
Check signal
at
A23(a)
signal
weak
or
absent
MVB
CR4
Figure
7-20
Left
DCA
steady
10
counts
at
see
rate
Check Sample Rate MVB
A23Q3,
Q4,
Q5,
Q6, Q7
Check
Holdoff
Trigger
Emitter
Follower
Figure
7
-20
Count
changes
with
setting
of
Sample
Rate
Control
=
+
10V
RESET depressed
=
0V RESET released
Figure
7
-20
E
0V constant
Check signal
at
M2(7)
signal
absent
or
weak
Check
Holdoff
MVB
A23Q11,
Q12
Check Gate
Inhibit
Amplifier
A22Q6
C
heck Transf
er
A22QB,
Q9,
CR3
Vary
setting
of
Sample Rate
Control,
Observe
Readout
contrd
from
p.6-11)
Check voltage
at
A23 (tO1
while
depressing
&
releasing
RESET
Figure
7-
19
Model 5245L
02349-
1
o5245-B-t2
6-L2

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