HP 3336A - Page 121

Performance Tests
4-36
h. Repeat Steps e thru g until time interval measurements have been taken for each
voltage listed in Step d. The repeating sequence is:
1. Set the time interval to 200 ns.
2. Increment the dc voltage by 1 V.
3. Record the new time interval on the work sheet.
i. Each value entered in column ‘‘T”’’ is the incremental time interval for a 1 volt input
step, plus 200 ns. The accumulative time interval is the sum of all the preceeding incremental
time intervals, less 200 ns per time interval. Find the accumulative time intervals (yn) and
enter the results in column ‘‘C’’, and in the ‘‘Measured Results’? column on the Perfor-
mance Test Record. If, for example, all the incremental time intervals are 700 ns, the ac-
cumulative time intervals would be:
0, 500 ns, 1000 ns, 1500 ns, . . . 5000 ns
j. Total all the entries in column ‘‘C’’.
k.
Multiply
the
corresponding
entries
in
column
‘‘A’”’
and
column
“‘C’’
together
and
enter
the
results
to
5
decimal places in
column
‘‘D’’.
1. Total all the entries in column ‘‘D’’.
m.
The
general
equations
to
find
the
slope
and
y
intercept
for
a
‘‘best
fit
straight
line’
are
rather
involved,
however,
in
this
particular
procedure
they
reduce
to:
ae
DL
eee
3
~
110
=
11
n.
Using
the
values
for
C
and
D
from
the
work
sheet
and
the
formula
from
the
previous
step,
compute
values
for m
and
b.
o.
Using
the
formula
y
=
mx
+
b,
with
the
specific
values
m
and
b
just
found,
compute
a
value
y
for
each
x
recorded
in
column
‘‘A’’.
Enter
the
results
in
the
‘‘Specification’’
column
on
the
Performance
Test
Record.
p.
Take
the
last
entry
in
the
‘‘Specification”
column
and
multiply
it
by
.005.
Enter
this
number
in
all
the spaces
in
the
‘‘Tolerance’’
column.
q.
In
order
for
the
3336
to
pass
this
performance
test,
the
‘‘Measured
Results’?
must
equal
the
corresponding
‘‘Specification’’,
plus
or
minus
the
‘‘Tolerance’’.
Model 3336A/B/C