Agilent Technologies 83620A User Manual

6.
Calculate
the
aging
rate
as
follo
ws:
Aging
Rate
=
(1
cycle/10
MHz)
(1/T1
0
1/T3)
(24
hours/T2)
Example:
T1
=
351
seconds
T2
=
3
hours
T3 =
349 seconds
=
(1
cycle/10
MHz)
(1/351s
0
1/349s)
(24h/3h)
= 1.306x10
0
11
per day
7.
En
ter
the aging
rate on
the test
record.
Note
If
the
absolute
frequency
of
the standard
and
of
the
timebase
oscillator are
extremely
close,
y
ou
can
reduce
the
measuremen
t
time
(T1 and
T3) b
y measuring
the time
required
for
a
phase
c
hange
of
less
than
360

.
In
step
6,
c
hange
1
cycle
to
0.5
cycle
for
180

,
or
0.25
cycle
for
90

.
Related
Adjustments
10
MHz
Standard
In
Case
of Difficulty
1.
Ensure
that
the
instrumen
ts
ha
v
e
warmed
up long
enough
and
that
en
vironmen
tal
conditions
ha
v
e
not
c
hanged
throughout
the
test.
2.
If
the
frequency
standard
and
the
in
ternal
standard
are
v
ery
dieren
t
in
frequency,
the time
required
for
a
360

phase
shift is
to o
short
for
an
accurate
measuremen
t.
If
the 360

phase
shift
tak
es
less than
tw
omin
utes,
p
erform
the
\10
MHz
Standard"
adjustmen
t.
3.
Refer
to
the
T
r
oublesho
oting
man
ual.
HP 8360 Performance Tests
Internal Timebase: Aging Rate
2-11
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Agilent Technologies 83620A Specifications

General

Brand	Agilent Technologies
Model	83620A
Category	Blower
Language	English