Performance Check Procedure-2225 Service
HORIZONTAL
1
Equipment Required (See Table
4-1):
Calibration Generator (Item 1)
Leveled Sine-Wave Generator (Item
2)
Time-Mark Generator (Item 3)
Test Oscilloscope (Item
6)
50-a Coaxial Cable (Item
8)
50-52 BNC Termination (Item 10)
INITIAL CONTROL SETTINGS
Vertical
POSITION (both)
Midrange
MODE
CH
1,
NORM
VOLTSIDIV (both)
0.5
V
VOLTSIDIV Variable (both) CAL detent
Magnification (both)
Xl
(CAL
knobs in)
AC-GND-DC (both) DC
Horizontal
POSITION (COARSE and FINE) Midrange
MODE
XI
SECIDIV
0.05
JLS
SEClDlV Variable CAL detent
MAG
X5
SLOPE
LEVEL
MODE
HOLDOFF
SOLlRCE
COUPLING
Positive
(I)
Midrange
P-P AUTO
MIN
CH 1
AC
PROCEDURE STEPS
1.
Check Timing Accuracy and Linearity
a. Connect 50-ns time markers from the time-
mark generator via a
504 BNC coaxial cable and a
504 BNC termination to the CH
1
OR
X
input
connector.
b. Adjust the Trigger LEVEL control for a stable,
triggered display.
c. Use the Horizontal POSITION controls to align
the second time marker with the second vertical
graticule line.
d. CHECK-Timing accuracy is within 3% (0.24
division at the tenth vertical graticule line), and
linearity is within 5% (0.10 division over any two of
the center eight divisions).
NOTE
For checking the timing accuracy of the
SECIDIV switch settings from
50
ms to
0.5
s,
watch the time marker tips only at the second
and tenth vertical graticule lines while adjust-
ing the COARSE and
FINE Horizontal
POSITION controls to line up the time markers.
e. Repeat Parts b through d for the remaining
SECJDIV and time-mark generator setting combina-
tions shown in Table 4-3 under the Normal column.
Scam
by
ARTEK
MEDLQ
*
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