Performance
Check-2445A/2455A
Service
27.
Set the Calibration Generator STD AMPLITUDE
output
level
to 0.2
V.
28.
CHECK-
Trigger
Level
Readout
is
within the lim-
its given
in
Table 4-2 for NOISE
REJ
Coupling.
f.
Return the TRIGGER COUPLING to
DC.
g.
Set the
CH
1 VOL TS/DIV
and
the Calibration
Gen-
erator output
level
to produce a vertical signal display 5
divisions
in
amplitude.
h.
CHECK-Display amplitude reduces to 2 divisions
or
less
when
the VOL TS/DIV
VAR
control (of the channel
under test)
is
rotated fully
CCW.
Return the VOLTS/DIV
VAR
control to its maximum
CW
(detent) position.
i.
Set the Calibration Generator output
level
and
VERTICAL POSITION controls for a 2-division display
vertically centered on the graticule. Use the
CH
1
VAR
control if necessary to obtain the correct display
amplitude.
j. Set the VERTICAL POSITION control to align the top
edge of the display with the top graticule line.
k.
CHECK-Signal display amplitude is 1.9 to
2.1
divisions.
I.
Set the VERTICAL POSITION control to align the
bottom edge of the signal display with the bottom graticule
line.
m.
CHECK-Signal display amplitude
is
1.9 to
2.1
divisions.
Table 4-2
Accuracy Limits
CH
1,
CH
2 INVERT, and Delta Volts Readouts
VOLTS/
Stand- Vertical Delta Volts
Limits of Trigger LEVEL
DIV ard Deflection Readout
Readout
Switch
Ampli- Accuracy
Accuracy
Setting tude
(±2%
(in
(limits)
DC Coupling NOISE
REJ
Coupling
CH
1
Input divisions)
1.25%
+.03
div
and Level
+Peak
-Peak
+Peak
-Peak
CH2
2mV
10
mV
4.90 to 5.10 9.
81
mV
to 10.
20
mV
8.0
mv
to 12.0
mV
+1.7
mV
to
-1.7
mV
5
mV
20mV
3.92 to 4.08
19.6
mV
to 20.4
mV
16.8
mV
to 23.2
mV
+2.6
mV
to
-2
.6
mV
10
mV
50mV
4.90
to
5.10 49.0
mV
to 50.9
mV
44
mV
to 56
mV
+4
.5
mV
to
-4
.5
mV
20mV
0.1
V 4.90 to 5.10 98.1
mv
to 102.0 mV
89
mv
to
111
mV
+8
.0
mV
to
-8
.0
mV
50
mV
0.2 V
3.92 to 4.08
196
mV
to 204
mV
178
mV
to 222
mV
+16
mV
to 148
mV
+46mV
-16mV
to
to
252mV
-46mV
100
mV
0.5 V
4.90 to 5.10
490
mV
to 509
mV
0.450 V
to
+0
.035 V
0.550 V
-0
.035 V
200mV
1.0 V 4.90
to
5.10
0.
981
V
to
0.90 V
to
+0
.
07
V
to
1.
020V
1.10 V
-0.07
V
500mV 2.0 V 3.92 to 4.08
1.96 V
to
1.78 V
0.16 V to
2.
04
V 2.
22V
-0
.16 V
1.0 V 5.0 V 4.90
to
5.10 4.
90
V to 5.
09
V 4.
50
V to 5.50 V
+0.35
V
to
-0
.
35
V
2.0 V
10
.0 V
4.90
to
5.10
9.
81
V to 10.2 V 9.0 V to 11.0 V
+0
.7 V to
-0.7
V
5.0 V
20.
0V
3.92 to 4.08
19.6 V
to
20.4 V 17.8 V to 22.2 V
+1.6
V
to
-1.6
V
4-8
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