Fluke 6060B Instruction Manual page 208

OPTION
-132
MEDIUM
STABILITY
REFERENCE
The
following
test
equipment
is
required:
Frequency Standard
Oscilloscope
Two
3-ft,
50-ohm
coaxial cables (Fluke Accessory
Y91
II)
In
this
procedure,
the
waveforms
of the
Unit
Under
Test
(UUT)
and
the
Frequency
Standard
are
viewed on
the oscilloscope
while triggering
on
the Frequency
Standard.
The evened
oscillator's
FREQ ADJ
control
is
then adjusted for a stationary display.
NOTE
An
alternate
method
of adjustment
is
to
count
the
lO-MHz
reference signal
at
the 10
MHz OUT
connector with a counter
that has a
suitably stable
and
accurate
reference.
To
perform
the
procedure, proceed
as follows;
1.
Turn
the
Generator
on,
set
the
REF INT/EXT
switch
to
INT, and
then wait
1
hour.
(If
the
Generator has
already
warmed up
for
at least
40
minutes,
it is
sufficient
to wait
an
additional 20 minutes
after the the
REF
INT/
EXT
switch
is
set
to INT.)
2.
Remove
the top Generator
cover.
The
frequency adjustment
control
is
accessed
through
the
upper
rear
left side.
3.
Connect
the
Frequency
Standard's output
signal to the oscilloscope's vertical
input
channel
I,
with 50
ohms
termination. Connect
the
UUT's
rear panel
lO-MHz
OUT
to the oscilloscope's vertical
input channel
2,
with 50
ohms
termination.
4.
Set the vertical controls of the oscilloscope to display the UUT's
lO-MHz
signal
and
the
Frequency
Standard's
lO-MHz
signal.
Set the oscilloscope
for internal
triggering
on
channel
1
and
adjust the timebase
for 0.1
usec/division.
5.
Adjust
the
oscillator
FREQ
for a
drift
of
less
than one
cycle in 10
seconds
(or a
counter frequency within
0.
1
Hz
of 10
MHz)
for O.OI
ppm
or
better
if
desired.
132-5. LIST
OF REPLACEABLE PARTS
A
list
of replaceable
parts for Option
-1
32
is
shown
in
Table
1
32-
1
.
A
component
location
diagram
for
Option
-132
is
shown
in
Figure 132-1.
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132-2