Adjustment Procedure-2225 Service
HORIZONTAL
Equipment Required (See Table 4-1):
Calibration Generator (Item 1
)
Test Oscilloscope (Item
6)
Leveled Sine-Wave Generator (Item
2)
50-fi BNC Termination (Item 10)
Time-Mark Generator
(Item3)
Low-Reactance Alignment tool (Item 15)
Screwdriver (Item 5)
50-fi Coaxial Cable (Item
8)
See
ADJUSTMENT LOCATIONS
at the back of this manual for adjustment locations.
INITIAL CONTROL SETTINGS
b. Align the first time marker with the first
(extreme left) vertical graticule line using the Horizon-
Vertical
tal POSITION control.
POSITION (both) Midrange
NOTE
-
MODE CH
1
VOLTSIDIV (both) 0.5 V
When making timing measurements, use the
tips of the time markers positioned at the center
VOLTSIDIV Variable (both) CAL detent
Xl (CAL
horizontal graticule line as the measurement
Magnification (both)
reference points.
knobs in)
AC-GND-DC (both)
Horizontal
c. ADJUST-X1 Gain (R775) for one marker per
division over the center eight divisions.
POSITION Midranae
2. Adjust Magnifier Gain (R731, R777)
MODE
SECIDIV
SECIDIV Variable
SLOPE
LEVEL
MODE
HOLDOFF
SOURCE
COUPLING
a. SET:
CAL detent
Horizontal MODE MAG
Horizontal MAG X5
/
b. Align the first time marker with the first
Positive
(I)
(extreme left) vertical graticule line using the Horizon-
Midrange tal POSITION control.
P-P AUTO
MIN
c. ADJUST-X5 Mag Gain
(R731) for five divisions
CH 1 between magnified markers.
AC
d. Set Horizontal MAG to
X10.
PROCEDURE STEPS
e. ADJUST-XI0 Mag Gain (R777) for 10 divisions
between magnified markers.
1.
Adjust 1-ms Timing (R775)
3. Adjust Magnifier Registration (R782, R730)
a. Connect 1-ms time markers from the time-
a. Set the Horizontal MAG to X50.
mark generator via a
50-a BNC coaxial cable and a
504 BNC termination to the CH 1
OR
X input b. Select
1
ms time-markers from the time-mark
connector. generator.
REV
APR
1990
Scans
by
ARTEK
MEDLA
=>
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