--
k.
Rotate the B DELAY TIME POSITION control fully
clockwise until the top of the 10th time marker
on
the B
Sweep
is
aligned with the same selected reference vertical
line
as
in
part
j.
Record the
DL
Y>
readout for part
I.
I.
CHECK-Delay
time readout
is
within the limits
given
in
Table A-6 (Delay Readout Limits column)
by
subtracting
the delay time reading
in
part j from part
k.
m.
Repeat parts k through I for the remaining B
SEC/DIV
and
time-mark generator settings given
in
Table
A-6, check
the
8-division delay time accuracy for
each
A
SEC/DIV switch setting given
in
column 1 of the table.
Table A-6
Settings for Delay Time Differential Checks
Time-Mark B
Generator
SEC/DIV
and A Setting
SEC/DIV
Settings
0.5
µ,S
0.05
µ,S
5
µ,S
0.5
µ,S
50
µ,S
5
µ,S
0.5
ms
50
µ,S
5
ms
0.5
ms
50
ms
5
ms
0.5 s
50
ms
5. Check Delay Jitter
a.
Set:
A SEC/DIV
B SEC/DIV
HORIZONTAL MODE
Eight
Division
Delay
4.000
µ,S
40.00
µ,S
400.0
µ,S
4.000
ms
40.00
ms
400.0
ms
4.000 s
0.5
ms
0.5
µ,S
B
Delay
Readout
Limits
3.948 to 4.052
µ,S
39.48 to 40.52
µ,S
394.8 to 405.2
µ,S
3.948 to 4.052
ms
39.48 to 40.52
ms
394.8 to 405.2
ms
3.948 to 4.052 s
b.
Select 50
µ,s
time markers from the time-mark
generator.
c.
Rotate the B DELAY TIME POSITION control coun-
terclockwise to position a time marker within the graticule
area
for
each
major dial division
and
CHECK that the jitter
on
the leading edge of the time marker does not exceed 2
divisions. Disregard slow drift.
Appendix
A-2230
Operators
6. Check Position Range
a.
Set:
HORIZONTAL MODE A
A SEC/DIV 10
µ,S
b.
Select
10
µ,s time markers from the time-mark
generator.
c.
CHECK-Start
of the sweep can
be
positioned to
the right of the center vertical graticule
line
by
rotating the
Horizontal POSITION control fully clockwise.
d.
CHECK-
The
11th time marker
can
be
positioned to
the left of the center vertical graticule line by rotating the
Horizontal POSITION control fully counterclockwise.
e.
Select
50
µ,s
time markers from the time-mark
generator.
f.
Align the 3rd time marker with the center vertical
graticule
line
using the Horizontal POSITION control.
g.
Set the
X10
Magnifier knob to
On
(knob out).
h.
CHECK-Magnified time marker
can
be
positioned
to the left of the center vertical graticule line by rotating
the Horizontal POSITION control fully counterclockwise.
i.
CHECK-Start
of the sweep
can
be
positioned to
the right of the center vertical graticule
line
by
rotating the
Horizontal POSITION control fully clockwise.
7.
Check Store Expansion Range
a.
Set:
A SEC/DIV
X10
Magnifier
0.1
µ,S
Off (knob
in)
b.
Select
10
ns
time markers from the time-mark gen-
erator.
c.
Use
the Horizontal POSITION control to align the
start of the A Sweep with the 1st vertical graticule
line.
d.
Set the STORE/NON STORE switch to STORE
(button
in).
A-15