Fluke 6060B - 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