Operating instructions
'
Check
for
1
time-marker
in
2
divisions
over
the
center
eight
divisions
.
J
Performance
Requirement
check
;
see
introductory
section
.
TABLE
5-3
Magnified
Sweep
Timing
Performance
Check
and
Adjustment-71380
N/
c
.
CHECK-Using
the
TIME/DIV
settings
and
time-mark
generator
settings
in
Table
5-3,
check
magnified
sweep
accuracy
for
1
time
mark/division, over
the
center
8
divisions,
within
the
tolerance given
in
Table
5-3
.
Set the
POSITION
controls
and
TRIGGERING
LEVEL
control
as
necessary for
a
stable
display aligned
with
the
vertical
graticule
lines
.
NOTE
The
7880
may
be operated
as
a
delayed
sweep
unit (8
horizontal
compartment)
with
a
companion
delaying
sweep
unit
(A
horizontal
compartment)
.
To
check
7880
delayed
sweep
operation,
refer
to
a
delaying
sweep
checkoutprocedure
in
the
Operating
Instructions
or
calibration
sections
of
the
instruction
manual
for
the
delaying
sweep
unit
.
This
completes
the
Performance
Check
and
Adjustment
procedure
.
TIME/DIV
Time
Markers
Tolerance
(+15
°
to
35
°
C)
10
ns
2
ns
1
W
ithin
0
.32
div
20
ns
2
ns
Within
0
.32
div
50
ns
5
ns
Within
0
.32 div
.1
p
s
10
ns
Within
0
.2
div
.2
ps
20
ns
Within
0
.2
div
.5
As
50
ns
Within
0
.2
div
1
As
.1
As
Within
0
.2
div
2 ps
.2
ps
Within
0
.2
div
5
ps
.5
ps
Within
0
.2
div
10 ps
1
ps
Within
0
.2
div
20
ps
2
ps
Within
0
.2
div
50
/is
5
ps
Within
0
.2
div
.1
ms
logs
Within
0
.2
div
.2
ms
20 ps
Within
0
.2
div
.5
ms 50
ps
Within
0
.2
div
1
ms
.1
ms
Within
0
.2
div
2
ms
.2
ms
Within
0
.2
div
5
ms
.5
ms
Within
0
.2
div
10
ms
1
ms
Within
0
.2
div
20
ms
2
ms
Within
0
.2
div
50
ms
5
ms
Within
0
.2
div
.1
s
10
ms
Within
0
.2
div
.2
s
20
ms
With
in
0
.2
div
.5s
50
ms
Within
0
.2
div
1
s
.1
s
Within
0
.4
div
2
s
.2
s
Within
0
.4
div
5
s
.5
s
Within
0
.4
div
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