--
Table A-5
Settings for Timing Accuracy Checks
SEC/DIV
Switch
Setting
0.05
µS
0.1
µS
0.2
µS
0.5
µS
1
µS
2
µS
5
µS
10
µS
20
µS
50
µS
0.1
ms
0.2
ms
0.5
ms
1 ms
2
ms
5
ms
10
ms
20
ms
50
ms
0.1
s
0.2 s
0.5 s
Time-Mark Generator Setting
Normal (X1)
50 ns
0.1
µS
0.2
µS
0.5
µS
1
µS
2
µS
5
µS
10
µS
20
µS
50
µS
0.1
ms
0.2
ms
0.5
ms
1
ms
2
ms
5
ms
10
ms
20
ms
50
ms
A Sweep Only
0.1
s
0.2 s
0.5 s
X10 Magnified
10
ns
10 ns
20
ns
50
ns
0.1
µS
0.2
µS
0.5
µS
1
µS
2
µS
5
µS
10
µS
20
µS
50
µS
0.1
ms
0.2
ms
0.5
ms
1
ms
2
ms
5
ms
10
ms
20
ms
50
ms
i.
Use
the
Horizontal POSITION control to align the 1st
time marker that
is
25
ns beyond the start of the sweep
with the
2nd
vertical graticule line.
j.
CHECK-Timing
accuracy
is
within 3% (0.24 division
at the 10th vertical graticule
line),
and
linearity
is
within 5%
(0.1
division over any 2 of the center 8 divisions). Exclude
any portion of the sweep past the 100th magnified
division.
k.
Repeat parts i
and
j for the remaining A SEC/DIV
and
time-mark generator setting combinations shown
in
Table A-5 under the "X1 O Magnified" column.
Appendix
A-2230
Operators
I.
Set:
HORIZONTAL MODE
A SEC/DIV
B SEC/DIV
X10 Magnifier
B
0.1
µS
0.05
µS
Off (knob
in)
m.
Repeat parts b through k for the B Sweep. Keep
the A SEC/DIV switch one setting slower than the B
SEC/DIV switch.
2. Check Store Differential and Cursor Time
Difference Accuracy
a.
Set:
Channel 1 AC-GND-DC
HORIZONTAL MODE
A SEC/DIV
X10 Magnifier
STORE/NON STORE
1K/4K
GND
A
0.1
ms
Off (knob
in)
STORE (button
in)
1 K (button
in)
b.
Use
the Channel 1 POSITION control to center the
base line vertically
and
the Horizontal POSITION control to
align the start of the trace with the 1st vertical graticule
line.
c.
Use
the CURSORS control
and
SELECT C1/C2
switch to set one cursor exactly on the 2nd vertical grati-
cule line
and
position the active cursor
to
the right using
the CURSORS control until
.:lT
readout displays 0.800
ms.
d.
CHECK-Graticule indication of cursor difference at
the 10th vertical graticule line
is
within 0.16 division.
e.
Set the Channel 1 AC-GND-DC switch to
DC.
f.
Select
0.1
ms
time markers from the time-mark gen-
erator.
g.
Align the
2nd
time marker with the
2nd
vertical grati-
cule line using the Horizontal POSITION control.
h.
Set the SAVE/CONTINUE switch to SAVE (button
in)
for a stable display.
i.
Use
the CURSORS control
and
SELECT C1/C2
switch to set the first cursor
on
the trailing edge
of
the
2nd
time marker.
A-13
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