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@ MANUAL
CHANGES
MODEL 5245L
ELECTROMC
COT'NTER
Manual
Serial Prefixed:
408-
Manual
Printed:
MAR
1964
MAKE
ALL
CORRECTIONS IN THIS MANUAL
ACCORDING
TO ERRATA BELOW, THEN CHECK
THE
FOLLOWING
TABLE
FOR
YOUR
INSTRUMENT
sERIAL PREFIX
{3 OIGITS)
OR
SERIAL
NUMBER
(8 DIGITS}
Ai{O
MAKE ANY LISTED CHANGE(S) IN
THE
MANUAL.
>
NEW ITEM.
5ERIAL PREFIX
OR
NUMBER
MAKE MANUAL
CHANGES
SERIAL PREFIX
OR
NUMBER
MAKE MANUAL CHAI{CEs
425-
429-
1.2
430-
t-2.3
442-
Lr2,3,4
Figure 5-35, Table
6-1,
Change:
A25Q4 to_2N2043; @
Stock
No. 1850-0092.
Recornmended
replacement
for all
5243A-65T assemblies.
Table 6-1,
Delete:
MP39
Bracket; Transformer
5248
A-LZA.
Paragraph 5-18 should
be
corrected to read as follows:
e.
Adjust
A19R?
until correct
count
appears. Alternately
decrease the output
of the
oscillator
and
adjust AlgR?
until
manimum
sensitivity
is
obtained.
f.
Vary frequency below
50
Mc.
Correct
count should
be
obained over the frequency range with a signal input of
100 mv.
Add:
h.
The
above
procedure adjusts the counter
for
manimum
sine wave
operation.
For pulse operatlon the sensttivity mugt
be
readjusted
for
manlmum
performance with either positive
'
or
negative pulses.
i.
For
negative
pulse operation, adjust sensitivity by turning
A19R7
in
a
clockwise direction.
j.
For positive pulse operation, adjust sensitivity by turning
A19R?
in
a
counterclockwise direction.
Paragraph 5-28
a.
change
last line to read
as
follows: ".
.
.
to pERroD
or
FREeuENcy.
"
Paragraphs 5-28
c,
and
5-29 c.
,
"
Change 20
Mc
to
50
Mc.
Figure
5-5:
Correct Figure 5-5
as
shown
in
Figure
1.
Figure
5-29:
Change
"GATED
SIG
TO A17
(2)" to "A1?(13)".
Table 6-1:
Add:
A8DS2
through
DSg
2140-0028.
Change: A21T1
to
9130-0035.
Supplement
A
for
05245-9001
t0-22-64
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