Tektronix 2205 Service Manual

Adjustment Procedure—2205 Service
f. Set the MAG switch from XI to X I0 position
and CHECK for no Horizontal shift in the time
marker..
g. Repeat parts c through f until no further
improvement is noted.
4. Check Position Range
a. Set:
SEC/DIV 0.1 ms
Horizontal MAG XI
b. Select 0.1 ms time markers from the time-
mark generator.
c. CHECK—The start of the sweep can be
positioned to the right of the center vertical graticule
line by rotating the Horizontal POSITION control fully
clockwise.
6. Adjust 0.1-ms and 0,1- jis Timing (R722 and
C703)
a. Set the SEC/DIV switch to 0.1 ms.
b. Select 0.1-ms time markers from the time-
mark generator.
c. ADJUST—0.1-ms Timing (R722) for 1 marker
per division.
d. Set the SEC/DIV switch to 0.1 ps.
e. Select 0.1-ps time markers from the time-
mark generator.
f. ADJUST—0.1-jis Timing (C703) for 1 marker
per division.
7. Adjust High-Speed Timing (C783, C794)
a. Set:
d. CHECK—The tenth time marker can be
positioned to the left of the center vertical graticule
line by rotating the Horizontal POSITION control fully
counterclockwise.
e. Select 0.5 ms time markers from the time-
mark generator.
f. Align the 3rd time marker with the center
vertical graticule line using the Horizontal POSITION
control.
g. Set the Horizontal MAG switch to X I0.
h. Check—Magnified time marker can be
positioned to the left of the center vertical graticule
line by rotating the Horizontal POSITION control fully
counterclockwise.
i. Check—The tenth time marker can be
positioned to the right of the center vertical graticule
by rotating the Horizontal POSITION control fully
clockwise. "
5. Check Variable Range
a. Set Horizontal MAG switch to XI and center
the display.
b. Set the SEC/DIV Variable control knob fully
counterclockwise.
Channel 1 AC-GND-DC AC
Horizontal MAG X I0
b. Select 20-ns time markers from the time-
mark generator and set the display for maximum
amplitude within the graticule area.
c. Adjust the Trigger LEVEL control for a stable
triggered display,
d. ADJUST-HS Timing (C783 and C794) for two
divisions between each time marker.
NOTE
The 20-ns time-markers tips are rounded off
&nd cannot be used as measurement
reference points. Use the rising edge of the
time markers as measurement reference
points to adjust the high-speed timing
capacitors. Vertically adjust the 50% point of
the time markers on the center horizontal
graticule line.
8. Check Timing Accuracy and Linearity
a. Set:
CH VOLTS/DIV 0.5 V
Horizontal MAG XI
c. CHECK—The spacing between time markers is
2 divisions or less.
d. Return the SEC/DIV Variable knob to the CAL
detent position.
b. Select 0.1 -ps time markers from the time-
mark generator.
c. Adjust the Trigger LEVEL control for a stable,
triggered display.
5-13

Tektronix 2205 Specifications

General

Brand	Tektronix
Model	2205
Category	Test Equipment
Language	English