Tektronix 465B User Manual

Calibration
Procedure—465B Service
Adjustment Procedure
1.
Check/
Adjust Sweep Start and A Sweep
Calibration
(R4570, R6053)
a. Connect 1 ms time
markers
to
the CH
1 input
from
the
time-mark generator via a 50 Q bnc cable and a 50
Q
termination.
Connect + Trigger Out from the time-mark
generator
to the
A External Trigger input via a 50 Q bnc
cable and a 50 Q termination.
b.
CHECK—Intensified portion of the sweep
begins
at
the second time
marker. (It may
be
necessary to readjust
the INTENSITY and B
INTENSITY controls,
so
that the
intensified portion of the sweep is
visible.)
c. ADJUST—
Sweep Start (R4570) so the intensified
portion of the sweep begins at the start of the
second
time
marker and the
pulse displayed on B DLY'D trace starts at
the
beginning of the sweep.
d.
Set
the DELAY
TIME POSITION
dial to 9.00.
e. CHECK—
Intensified
portion of
the sweep begins at
the tenth time
marker.
f. ADJUST—A Sweep Cal (R6053) so the intensified
portion of the sweep begins at the start of the tenth time
marker and the
pulse displayed on B DLY'D trace starts at
the
beginning of the sweep.
g.
INTERACTION—Between Sweep Start and A
Sweep
Cal adjustments. Repeat both until no further
improvement
is noted.
2.
Check Delay or
Differential Time Linearity
a. Set
the DELAY
TIME POSITION dial to position the
tenth time
marker
to the
beginning of the sweep.
b.
Note the reading on the
DELAY TIME POSITION
dial.
c.
Adjust the DELAY
TIME POSITION
dial sothe
ninth
time
marker is at the
beginning of
the sweep.
d.
CHECK—DELAY TIME POSITION dial for a dif-
ference in
reading of: 1.00 ±0.01 (0.99 to
1.01),
from
+15°
C to
+35°
C;
1.00 ±0.03 (0.99 to
1.03),
from
-15°C
to
55°
C,
than the reading
noted in part
c.
NOTE
1 division of the DELA Y TIME POSITION
dial
is one
complete revolution of the inner knob. 0.01 division
is
one minor division of the inner knob.
e.
Rotate the DELAY TIME POSITION dial to position
each
successive time marker
to
the beginning of the
sweep.
f.
CHECK-DELAY TIME POSITION dial for a
difference in
reading
of: 1.00 ±0.01 (0.99
to
1.01)
from
+1
5°
C to
+35°
C; 1 .00 ±0.
03
(0. 99 to
1
.03) ,
from
-
1
5°
C to
+55°
C,
than the adjacent time marker.
3.
Check/Adjust
Horizontal Amplifier Gain (R4373,
R4272)
a. Set:
HORIZ DISPLAY A
TIME/DIV (both) 1
ms
DELAY TIME
POSITION Fully counterclockwise
b.
Select
1
ms time markers from the
time-mark
generator.
c.
CHECK—
Display for 1
marker/division
±2%
(±0.2
division at the eleventh
time
marker).
d.
ADJUST—XI Gain
(R4274) for
exactly 1
marker/division.
e. Select 0.1 ms
time markers from the time-mark
generator.
f. Press
X10 MAG push button in.
g.
CHECK—X10 MAG LED is on when the X10 MAG
push button is in.
h. CHECK—1
marker/division
±3% (±1 1/2
minor
divisions at the eleventh time marker).
i. ADJUST—X10 Gain (R4373) for exactly
1
time
marker/division.
REV A
SEP 1979
4-53

Tektronix 465B Specifications

General

Brand	Tektronix
Model	465B
Category	Test Equipment
Language	English