Performance
Check-2445A/2455A
Service
Table 4-8
Horizontal Timing Accuracy Checked
Against the Graticule
1 Div 2 Div 3 Div
Time-marker Accuracy ±0.07 ±0.07
±0.08
(X10
MAG
Off)
Div
Div
Div
Time-marker Accuracy ±0.07 ±0.08 ±0.1
(X10
MAG
On)
Div
Div Div
As Measured Against These Time-
1-2
1-3 1-4
Marker Pairs (X10 MAG Off
Only)
2-3
2-4
2-5
3-4 3-5 3-6
4-5
4-6 4-7
5-6
5-7
5-8
6-7
6-8 6-9
7-8 7-9 7-10
8-9
8-10
8-11
9-10
9-11
10-11
g. Rotate the
~
REF
OR
DL y
POS
control
ccw
until
the cursor stops moving.
h.
CHECK-~
REF
cursor aligns with the 1st graticule
line within 0.2 division.
i. Rotate the
~
control
CW
until the cursor stops
moving.
j.
CHECK-~
cursor aligns with the 11th graticule line
within 0.2 division.
k.
Set
the A SEC/DIV to
10
ns.
I.
Rotate the
~
REF
OR
DL
Y
and
the
~
controls to pre-
cisely superimpose the cursors near the 2nd graticule
line.
m.
CHECK-~t
readout indicates a difference of
0.30
ns
or less.
4-24
Over Any
4 Div 5 Div
6 Div 7 Div 8 Div 9 Div
10 Div
±0.09
±0.10
±0
.10 ±0.11
±0.12
±0.12
±0.13
Div
Div
Div
Div
Div Div Div
±0.11 ±0.12
±0
.13
±0.14
±0.16
±0.17
±0.18
Div Div
Div
Div
Div
Div Div
1-5 1-6 1-7
1-8
1-9
1-10
1-11
2-6 2-7 2-8
2-9
2-10
2-11
3-7 3-8
3-9
3-10
3-11
4-8 4-9 4-10
4-11
5-9
5-10
5-11
6-10
6-11
7-11
n.
Rotate the
~
REF
OR
DL Y
and
the
~
controls to pre-
cisely superimpose the cursors near the 10th graticule line.
o.
CHECK-~t
readout indicates a difference
of
0.30 ns
or
less.
p.
Set:
HORIZONTAL
A SEC/DIV
B SEC/DIV
X10
MAG
TRIGGER
B TRIGGER MODE
Delta
~t
20 ns
10 ns (knob
in)
Off
RUN AFT
DLY
On
(Push
~t
for
~t
cursors)
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