Adjustment Procedure—2205 Service
HORIZONTAL
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
50-fl Coaxial Cable (Item 6)
Leveled Sine-Wave Generator (Item 2)
5 0 -fl Termination (Item 8)
Time-Mark Generator (item 3)
Alignment Tool (Item 11)
Test Oscilloscope (Item 4)
See ADJUSTMENT LOCATIONS 1 and ADJUSTMENT LOCATIONS 2
at the back of this manual for test point and adjustment locations.
INITIAL CONTROL SETTINGS
Vertical
POSITION (both) Midrange
MODE CH 1
VOLTS/DIV (both) 0.5 V
VOLTS/DIV Variable (both) Cal detent
AC-GND-DC (both) DC
Horizontal
POSITION Midrange
MAG XI
SEC/DIV 1 ms
SEC/DIV Variable CAL detent
Trigger
SLOPE Positive (~J~)
LEVEL Midrange
MODE P-P AUTO
SOURCE CH 1
PROCEDURE STEPS
1. Adjust 1-ms Timing (R744)
a. Connect 1-ms time markers from the time-
mark generator via a 50-fl coaxial cable and a 50-fl
termination to the CH 1 or X input connector.
b. Align the first time marker with the first
(extreme left) vertical graticule line using the
Horizontal POSITION control.
NOTE
When making timing measurements, use the
tips of the time markers positioned at the
center horizontal graticule line as the
measurement reference points.
c. ADJUST—XI Gain (R744) for one marker per
division over the center eight divisions.
2. Adjust Magnifier Gain (R777)
a. Set the MAG switch to X I0.
b. Select 100 ns time markers from the time-
mark generator.
c. Align the first time marker with the first
(extreme left) vertical graticule line using the
Horizontal POSITION control.
d. ADJUST—X I0 Mag Gain (R777) for 1 time
marker per division.
3. Adjust Magnifier Registration (R782)
a. Set the SEC/DIV switch to 0.2 ms.
b. Select 1 ms time markers from the time-mark
generator.
c. Position the middle time marker to the center
vertical graticule line using the Horizontal POSITION
control.
d. Set the MAG switch from X I0 to XI position.
e. ADJUST—Mag Reg (R782) to position the mid
dle time marker to the center vertical graticule line.
5-12
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