Tektronix 465M User Manual

AIR FORCE
T033A1-13-496-1
NAVELEX
0969-LP-170-0010
Maintenance
Instructions
m. Trigger
Hystersis and Slope Centering
(Figure 5-20).
(1
)
Set controls as follows:
VOLTS/D IV
5
m
AANDBTIME/DIV
5
/is
XI
0
MAG Out (off)
VERT MODE
CH 2
A
LEVEL
0
A
SOURCE
CH2
(2)
Connect
a sine wave generator
to
CH
1
and CH 2
through a 50 ohm
BNC cable,
50 ohm terminator, and
dual
input coupler. Set the
output
for
50 kilohertz and
adjust
for
a
4 division display.
(3)
Set R2245
at
midrange.
(4)
Adjust R2249
so
trace
starts
at
the same point
when
switching ASLOPE
between IN:
—
and
OUT:
+.
(5)
Set
CH 2
VOLTS/DIV to
.1,
A
AND B
TIME/
Dl V to
50
MS,
and A
SLOPE
to
OUT:+.
TOP OF
INSTRUMENT
NOTE
When
making the
next
adjustment, set
CH 2
VOL TS/DIV to
.1
for
a
0.2
division signal
and .2
for a 0.1
division
signal.
(6)
Adjust
R2245 and A
LEVEL
so a
stable
display
is
obtained with a
0.2
division display, but
not
with
a 0.1
division display.
NOTE
If
R2245
is set too
sensitive, double
triggering
may occur at
low
frequencies. To
desensitize
R2245,
adjust A
LEVEL
until the display just
double triggers.
Then
slightly readjust R2245
until the double
triggering
disappears.
(7)
Set CH 2
VOLTS/DIV to 5
m and A
AND
B
TIME/DlVto
5 ms.
(8)
Repeat step
(4)
above.
(9)
Set CH 2
VOLTS/DIV to 20 m
and adjust A
LEVEL for
a
stable display.
(10)
Set controls as
follows:
VERT
MODE
CHI
HORIZMODE
BDLY'D
B SOURCE CHI
B
LEVEL 0
AANDBTIME/DIV
5 ms
(11)
Set R2185to
midrange.
(12)
Adjust R2183 so trace starts at
the same point
when switching B
SLOPE between IN:
—
and OUT:
+.
(13)
Set CH
1
VOLTS/DIV
to
.1,
A
AND B TIME/
Dl V to
50
MS,
and B
SLOPE
to
OUT:
+.
NOTE
When making the next adjustment, set CH 1
VOLTS/DIV to .1
fora
0.2
division display
and
.2
for
a 0.1 division display.
(14)
Adjust R2185 and
B
LEVEL
so a stable display
is obtained
with a 0.2 division display, but not with
a
0.1
division
display.
TRIGGER
BOARD
NOTE
RIGHT SIDE
REAR
OF
If H2 185
is set
too
sensitive,
double
triggering
INSTRUMENT
may occur
at
low
frequencies. To
desensitize
R2185,
adjust
B
LEVEL
until
the display just
double
triggers,
then
slightly
readjust R2185
Figure
5-20.
Trigger hysteresis
and slope centering adjustment locations.
until
the
double
triggering
disappears.
5-50

Tektronix 465M Specifications

General

Brand	Tektronix
Model	465M
Category	Test Equipment
Language	English