Adjustment Procedure-2225 Service
10.
Check Vertical ALT Operation
a. SET:
AC-GND-DC (both)
Vertical MODE
SECIDIV
Trigger SOURCE
GND
BOTH, NORM,
and ALT
0.1
s
CH 1
b. Position the Channel 1 and Channel 2 traces
about two divisions apart using the CH 1 and CH 2
POSITION controls.
c. CHECK-That the MAG trace can be positioned
three divisions or more ABOVE the unmagnified trace
using the TRACE SEP control. SN 202908 and
above-
check for positioning three divisions above and below
the unmagnified trace.
13.
Check ADD MODE Operation
a. SET:
VOLTSlDlV (both) 20 mV
AC-GND-DC (both) DC
Vertical MODE BOTH, NORM,
and ALT
c. CHECK-Channel 1 and Channel 2 traces move
SECIDIV
across the screen alternately.
Horizontal MODE
Trigger SOURCE
11.
Check CHOP Operation
NOTE
Chop Switch Balance adjust only applies to
the following range of instruments: Serial
Numbers
100000
-
100809
and
202908
-
209929
.
a. SET:
Vertical MODE
SECIDIV
Trigger MODE
Trigger SOURCE
BOTH, NORM,
and CHOP
1 FS
NORM
VERT MODE
b. ADJUST-Chop Switch Balance
(R140) for no
triggering on chop segments when rotating the Trig-
ger LEVEL control.
12.
Check TRACE SEP Range
a. SET:
VOLTSIDIV (both)
Vertical MODE
SECIDIV
Horizontal MODE
Trigger MODE
Trigger SOURCE
TRACE SEP
5
mV
CH 1
10
FS
ALT
P-P AUTO
EXT, EXT
Fully ccw
b. Position the trace on the center horizontal
graticule line using the CH 1 POSITION control.
b. Position both traces on the center horizontal
graticule line using the CH 1 and CH 2 POSITION con-
trols.
c. Set the calibration generator to produce a
50-mV signal.
d. Connect the output of the calibration generator
to both the CH 1
OR X input and the CH 2 OR
Y
input
with dual-input coupler.
e. Check that both channels show a 2.5-division
display.
f. SET:
Vertical MODE ADD
AC-GND-DC (both) DC
g. CHECK-That the resultant display is five divi-
sions
f
3%
(4.85 to 5.15 divisions).
h. Disconnect the test equipment from the instru-
ment.
14.
Adjust High-Frequency Compensation
a. SET:
VOLTSIDIV (both)
MODE
SECIDIV
10
mV Vertical
CH 1
0.2
FS
b. Connect the positive-going, fast-rise, square-
wave output from the calibration generator via a 50-a
BNC coaxial cable, a 1 OX BNC attenuator, and a 50-a
BNC termination to the CH
1
OR
X
input connector.
5-1
0
REV
APR
1990
Scam
by
ARTEK
MEDLQ
=>
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