Tektronix 5441 Instruction Manual page 83

Adjustment Procedure-5441lR5441
P 2 0 0
' c s 4 :
43jEl-.
--7------
----------
0 1 5 2
...
R251
-
.
-
( R Z l l h m
10
ns
TIMING
r-
CR212
JIOO
0 2 1 4 0 2 8 0
,
,
R212
I
5 ns TIMING
C116
0
-*
C R I I 5
.f
R 3 6 4
" '
-c@3
-
R 2 6 5
1
C 2 4 4
2140-28
Fig. 4-6. Location of Horizontal adjustments (Horizontal circuit board).
d. Set the time-base unit for auto, internal triggering, and
the sweep rate to 10 nsldiv. Adjust the time-base triggering
controls for a stable display.
e. CHECK-For one 10 ns marker per division over the
center eight major graticule divisions of the display (position
as necessary).
f. ADJUST-C210 for one 10 ns marker per: division
over the center eight major graticule divisions of the display.
Sweep accuracy is ? 5 % over the entire sweep, excluding
the first 30 ns and the last 10 div of the magnified sweep.
See Fig. 4-6 for the adjustment location.
4. Adjust 5 ns Timing
d. ADJUST-C235 for two 5 ns markers per division
over the center eight graticule divisions of the display.
Sweep accuracy is +6% over the entire sweep, excluding
the first 30 ns and the last 10 div of the magnified sweep.
See Fig. 4-6 for the adjustment location.
e. Interaction will occur between the adjustment of C210
and C235. Repeat step 3 and step 4 to achieve a timing
compromise.
f. Press the POWER switch to turn off the oscilloscope.
Disconnect all cables.
ALTERNATE PROCEDURE
a. Set the time-mark generator for 5 ns markers. Set the
Pulser Amplitude control so the markers are at least five
NOTE
divisions in amplitude.
Use the following alternate procedure when the 5A48
is substituted for the calibration fixture (Pulser) plug-in
unit.
b. Set the time-base unit for auto, internal triggering, and
the sweep rate to 10 nsldiv. Adjust the time-base triggering
controls for a stable display.
Control Settings
c. CHECK-For two 5 ns markers per division over the
Amplifier Unit
center eight major graticule divisions of the display (position
as necessary). Position
Midrange
REV MAY 1982