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Section
VI
Paragraphs 6-34 to
6-37
6-34.
MALFUNCTION DURING
SELF
C H
E
C
K.
If
counter malfunctions
in
some,
but not all, check func-
tions,
see Table
6-8 for
probable
cause.
If
counter
will
not self-check
for
any
function,
see Trouble-
shooting
"Tree,
"
Table 6-7.
6-35.
MALFUNCTION
DURING
OPERATION.
If
the
counter
will
turn
on,
but malfunctions
when
operation
is
attempted, switch
to
Self
Check
for
the
function
and
time
base
desired.
If
Counter
will
Self
Check
but
will
not function
with
an
external signal, check setting
of
SENSITIVITY and
LEVEL controls, input
signal
level,
and
connections
to
counter.
Model 5245L
6-36.
If
counter
will
function
in
FREQUENCy
mode
but not
in
PERIOD
(betow 1
MHz)
check
control
gate
b
(A21
cR5,
cR11). If
counter
will
function
in
pERIoD
but
not in FREQUENcY,
check
control gate
z
(AzlcR3,
CRg).
rf
counter malfunctions
in
both pERIoD
and
FREQUENCY,
but self checks in both functions,
check
input attenuator
and
input amplifier.
6-37.
If
counter malfunctions
when
operation
is
at-
tempted
and
fails to
self-check in thefunctiondesired
(see
Paragraph
6-34).
213
1,
2.
3.
4.
5.
Turn SAMPLE RATE
contror cloclnvise from
POWER
OFF position to
turn
counter
on.
Set
SENSITIVITY
switch to
CHECK.
Set
LEVEL control to
PRESET.
Set
FUNCTION
switch
to
FREeUENCY.
see
table
below
for proper
display
(r
r
count)
for
each
position of TIME BASE switch.
6.
Set
FUNCTION switch
to
MAITUAL
START.
Counter should count continuously
at
fre-
quency selected on
TIME BASE switch.
set FUNCTION
switchto
1
PERIOD AVERAGE.
See
table below
for proper
display (r1
count)
for
each PERIOD AVERAGE position
of
the
'l
.
8.
TIME
BASE
1ps
10
i/
s
.1ms
1ms
10 ms
.Ls
1s
10
s
DISPLAY
00000010. MHz
0000010.
0
MHz
000010.
00
MHz
00010000.
kHz
0010000.
0
kHz
010000.00
kHz
10000.
000
kH.z
0000.
0000 kHz
FUNCTION switch.
PERIOD
AVERAGE
DISPLAY
00000001
000000
1
0
00000
1
00
0000
1
000
0001
0000
00
1
00000
1
10
100
1K
10K
100K
4,6,7
Figure
6-1.
Self
Check
02349-
1
o5245-8-tl
6-4
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