Horizontal; Initial Control Settings; Procedure Steps; Adjust 1-Ms Tim Ing - Tektronix 2205 Service Manual

Adjustment Procedure—2205 Service
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
Leveled Sine-Wave Generator (Item 2)
Time-Mark Generator (item 3)
Test Oscilloscope (Item 4)
See
at the back of this manual for test point and adjustment locations.

INITIAL CONTROL SETTINGS

Vertical
POSITION (both)
MODE
VOLTS/DIV (both)
VOLTS/DIV Variable (both)
AC-GND-DC (both)

Horizontal

POSITION
MAG
SEC/DIV
SEC/DIV Variable
Trigger
SLOPE
LEVEL
MODE
SOURCE

PROCEDURE STEPS

1. Adjust 1-m s Timing (R744)
a. Connect 1-ms time markers from the tim e-
mark generator via a 5 0 -fl coaxial cable and a 5 0 -fl
termination to the CH 1
b. Align the first time marker with the first
(extreme left) vertical graticule line using the
Horizontal POSITION control.
5-12
HORIZONTAL
ADJUSTMENT LOCATIONS
Midrange
CH 1
0.5 V
Cal detent
DC
Midrange
XI
1 ms
CAL detent
Positive (~J~)
Midrange
P-P AUTO
CH 1
X input connector.
or
5 0 - fl Coaxial Cable (Item 6)
5 0 - fl Termination (Item 8)
Alignment Tool (Item 11)
1 and
ADJUSTMENT LOCATIONS
When making timing measurements, use the
tips of the time markers positioned at the
center horizontal
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.
2
NOTE
graticule line as the