Operating instructions

5s
REVAPR 1985
TABLE 5-6
Magnified Sweep Timing
Tolerance
(+-150 to 35 0 C)
W ithin 0 .32 div
Within 0 .2 div
Within
0 .2 div
Within
0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0
.2
div
Within
0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 div
Within 0 .2 d iv
Within 0 .2 div
Within
0 .2 div
Within
0 .2
div
Within
0 .
2
d
iv
Within 0 .4 div
Within 0
.4
div
Within
0 .4 div
Check for 1
time-marker in 2 divisions over the center eight divisions .
v Performance
Requirement check ; see introductory information .
Performance Check and Adjustment-71387
v B14 . CHECK SPECIAL
READOUT ENCODING
a .
Remove the 71387 from
the oscilloscope mainframe
.
b . Set the
AQS CLOCK/AQR
switch to INTERNAL .
c . Connect the digital multimeter
between pins A29
and
B37
on the plug-in rear interface
connector . Refer to Fig-
ure 4-5 in
the Maintenance
section for the location of pin
numbers
on the interface
connector .
v d . CHECK-The

resistance

should

measure

150 ko,
within the
limits of 142 .5 to 172 .5 kQ .
e . Set the AQS
CLOCK/AQR
switch to INT :-- 1000 .
f . CHECK-The
resistance should measure
75 kQ, within
the limits of 71 .25
to 78 .75 k52 .
g . Set the
AQS CLOCK/AQR switch
to EXTERNAL .
v h . CHECK-The
resistance should
measure 50 kQ, within
the limits of 47 .5
to 54 .1 ko .
This completes the
Performance Check and Adjustment
procedure .
5- 1 5