Adjustment Procedure—2205 Service
VERTICAL
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
10X Attenuator (Item 9)
Leveled Sine-Wave Generator (Item 2)
Miniature Probe Tip to BNC Adapter (Item 10)
50-fl Coaxial Cable (Item 6)
Alignment Tool (Item 11)
Dual-Input Coupler (Item 7)
10X Probe (Item 12)
50-0 Termination (Item 8)
See a d j u s t m e n t l o c a t io n s i a nd ADJUSTMENT LOCATIONS 2
at the back of this manual for adjustment locations.
INITIAL CONTROL SETTINGS
Vertical :
POSITION (both) Midrange
MODE CH 1, NORM
VOLTS/DIV (both) 5 mV
VOLTS/DIV Variable (both) Cal detent
AC-GND-DC (both) GND
Horizontal
POSITION Midrange
MAG XI
SEC/DIV 0.5 ms
SEC/DIV Variable CAL detent
Trigger
SLOPE Positive (_r)
LEVEL Midrange
MODE P-P AUTO
SOURCE EXT, EXT
PROCEDURE STEPS
t. Adjust Channel 1 Variable Balance (R33)
a. Rotate the CH 1 VOLTS/DIV Variable control
fully counterclockwise.
b. Position the trace on the center horizontal
graticule line using the CH t POSITION control.
c. Rotate the CH 1 VOLTS/DIV Variable control
clockwise to the GAL dSteht.
d. ADJUST-CH 1 Var Bal (R33) to set the trace
to the center horizontal graticule line.
e. Repeat parts a through d until there is no trace
shift between the fully clockwise and the fully
counterclockwise positions of the CH 1 VOLTS/DIV
Variable control.
f. Return the CH 1 VOLTS/DIV Variable control to
the CAL detent.
2. Adjust Channel 2 Variable Balance (R83)
a. Set Vertical MODE switch to CH 2.
b. Rotate the CH 2 VOLTS/DIV Variable control
fully counterclockwise.
c. Position the trace on the center horizontal
graticule line using the CH 2 POSITION control.
d. Rotate the CH 2 VOLTS/DIV Variable control
clockwise to the CAL detent.
e. ADJUST—CH 2 Var Bal (R83) to set the trace
to the center horizontal graticule line.
f. Repeat parts a through d until there is no trace
shift between the fully clockwise and the fully
counterclockwise positions of the CH 1 VOLTS/DIV
Variable control.
5-8
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