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Section
III
Table 3-2
Model 5245L
Table
3-2.
In-Cabinet Performance Check (cont'd)
F1
50 MHz
10 MHz
1 MHz
100
kHz
10
kHz
1
kHz
500
Hz
100
Hz
F2
100 Hz
100
Hz
100 Hz
100
Hz
100
Hz
100
Hz
100
Hz
100
Hz
Ratio FL/F2
500, oo0
100, 000
10,000
1,
000
100
10
5
1
2.
F2 FREQUENCY RANGE:
0
to
300
kHz.
Set
Counter
controls as follows:
SENSITTVITYto.IVOLT
SAMPLE RATE
to slightly
clockwise out of
POWER
OFF
TIME
BASE
to
EXT.
FUNCTION
to
10
PERIOD
AVERAGE.
-
LEVEL + to
PRESET
Connect Frequency Synthesizer set
for
1 MHz
at
0. 1V
rms to
the Counter
TIME
BASE EXT
connector.
Connect
Low Frequency Generator to Counter DC SIGNAL
INPUT. Vary
Low Frequency Generator
from
2,
5,
and 10
Hz
at
0.
lV
rms.
Observe Counter
display
for ratio
f
t/pZ.
Record
results
on
test
card.
Replace
Low Frequency Generator with Synthesizer
and
set
to frequencies as
shown
(F2).
Use
1
MHz
from
OUTPUT
STD
FREQ
for
Fl.
Record
readings
on
test
card.
F2
2
5
10
100
1kc
100
kc
300
kc
Ratio
Fl/Fz
500000
200000
100000
10000
1000
10
3.3
I
MULTIPLE PERIOD:
1
to
105
in
decade steps.
a.
Set
Counter
controls as follows:
SENSITIVITYto.IVOLT
SAMPLE RATE
to slightly
clockwise out of pOWER OFF
TIME
BASE
to
EXT
FUNCTION
to
1
PERIOD
AVERAGE
-
LEVEL + to
PRESET
c.
Connect Frequency Synthesizer set
to
1
MHz
at
0. 1V
rms to Counter TIME
BASE
EXT input.
d.
Connect
Oscillator
set
to
100
kHz
at
0. 1V
rms to
Counter DC SIGNAL INPUT
e.
Counter should display the
ratio
of.
Fl/r2 *
1
count.
Record results
on
test
card.
TIffiE BASE:
FREQUENCY
(INTERNAI):
I
MHz
Stability:
Aging
Rate:
Less than
3
p""tffiours.
As
a
function of line voltage: less than
r5
parts in
1010
for
changes
of
*L1Vo.
As
a
function of ambient temperature: less than +
2
parts in
1010
per
"C from
-20'C to
+bboC.
3-6
02349-1
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