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Section
III
Table 3-2
Table
3-2.
Irr-Cabinet
Performance Check (cont'd)
b.
Connect
output
from rear
panel SCALER RATIO OUTPUT
jack to Oscilloscope
or
another 5245L.
c.
Connect
output
of
Frequency Synthesizer
to
Counter DC SIGNAL INPUT.
d.
Set Frequency Synthesizer
for
50
MHz
at
0.
1
V
rms.
The scaled output should be
5
MHz.
Record
results
on
test
card.
2.
FACTOR: by
decade
selectable
from
10
to
109
a.
Set
Counter
controls
as
follows
SENSITMTYto.IVOLT
SAMPLE RATE
to slightly clockwise
out
of
POWER
OFF.
TIME
BASE
to
10 sec.
FUNCTION
to
MAN
START.
-
LEVEL
+
to
PRESET
MODE
(rear
panel)
to
SCALER
OUTPUT
(rear
panel)
to
SCALER
RATIO
10.
b.
Connect
rear
panel SCALER RATIO OUTPUT
to
the
Oscilloscope
or
another Counter.
c.
Connect
the output
of the Frequency Synthesizer to the Counter DC SIGNAL INPUT.
d.
Set
Frequency Synthesizer output
for
50
Mhz
at
0.
lV
rms.
e.
Rotate
rear
panel OUTPUT switch
through SCALER RATIO positions
from
10
through
109.
The
OUTPUT should reduce
by
a
factor of
10
for
each
setting.
Record results
on
test
card.
PERIOD
'NEASUREffIENTS
1.
FREQUENCY RANGE SINGLE
PERIOD:
0
to
1 MHz
a.
Set
Counter controls as follows:
SENSITIVITYto.I
VOLT
SAMPLE RATE
to slightly
clockwise out of
POWER
OFF
TIME
BASE
to
.1
psec
FUNCTION
to
1
PERIOD
AVERAGE
-
LEVEL
+
to
PRESET
b.
Connect
output
of
Frequency Synthesizer
to
Counter DC SIGNAL INPUT.
c.
Set
Synthesizer Frequency
for
1
Mhz
at
0.
lV
rms.
d.
Counter should
display
1
ps,
with decimal point correctly positioned
and
measurement
unit
displayed.
Record
results
on
test
card.
2.
FREQUENCY
RAT,IGE
MULTIPLE PERIOD:
0
to
300
kHz.
a,
Set
Counter controls
as
follows:
SENSITTVITY
to.l
VOLT
SAIVIPLE
RATE
to slightly
cloclnvise out
of
POWER
OFF
TIME
BASE
to
10 sec.
FIINCTION
to
PERIOD
AVERAGE
-
LEVEL
+
to
PRESET
b.
Connect output
of
Frequency Synthesizer
to
Counter DC SIGNAL INPUT.
c.
Set Frequency Synthesizer
for
300
kHz
at
0.
lV
rms.
d.
Rotate
TIME
BASE
switch cloclnrise to
.
1
ps observing
count. Slitch
FIJNCTION
switch
to
10
PERIOD AVERAGE
and
rotate TIME
BASE
switch counterclocliwise through
10
sec
observing
count
at each
setting.
Repeat
rotation of TIME
BASE
switch at
each
position of PERIOD
AVERAGE
switch.
Record
results
on
test
card.
This
check
also checks Item
5,
OUTPUT DISPLAY.
Model 5245L
3-4
02349-1
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