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Read Differentially:
A and
B,
B Inverted
Time Base
:
10 msec per Division
External
Trigger:
Test Point
7,
Positive Edge
2.4.1 .10
Read the output
voltage.
2.4.1.11
With a gram
gauge,
carefully apply fifteen (15) grams pressure to the upper arm, increasing the load
force on the magnetic head.
Note
Fifteen grams is about the weight of a quarter.
2.4.1 .12
If the output shown on the dual-channel
,
wideband oscilloscope increases by more than ten percent
(10%), adjust the
compliance.
2.4.2
Compliance Adjustment
The compliance is adjusted by using the same procedure as is used in the compliance check (see Section 2.4.1 ).
2.4.2.1
Turn the two (2) nuts that attach the upper arm to the carriage assembly (see Figure 2-1 0) counter-
clockwise one-quarter (1
/4)
turn with a
3/16"
nut driver.
UPPER
ARM
Figure2-10
Upper Arm and Nuts
CARRIAGE
ASSEMBLY
2.4.2.2
While monitoring the
output,
move the upper arm around the axis of the head until the output is the
highest.
2-11
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