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Tektronix 2235 Operator's Manual

Tektronix 2235
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Page #36 background image
Operating
Proce
d
ures-2235
ΑΝ
/USM-488
O
p
erators
11
.
R
ea
d
just
the
Α
TRIGGER
LEVEL
control
for
α
stable
NOTE
d
isplay
.
TheΑ
T
R
IGG
ER
mode
can
be
use
d
to
trigger
on
ei-
ther
t
h
e
TV
L
ine
or
TV
F
ield
.
F
or
familiarization
w
i
t
h
12
.
R
emove
the
square-wave
signal
from
the
CH
1
input
t
h
ese
functions
see
T
V
Line
Signal
an
d
T
V
Field
S
ί
g-
connector
.
ηαΙ
in
t
he
"
B
asic
Applications"
part
of
this
section
.
13
.
Press
in
the
ΑTRIGGER
SGL
SWP
button
momen-
tarily
for
single-sweep
operation
.
14
.
Observe
that
the
READY-TRIG'D
light
illuminates,
indicating
that
the
Α
Trigger
circuit
is
armed
(READY)
for
α
single-sweep
dis
p
lay
.
No
d
isplay
should
be
p
resent
on
the
crt
screen
.
15
.
R
econnect
the
s
q
uare-wave
signal
to
the
CH
1
input
connector
.
Α
single
swee
p
of
the
applie
d
signal
should
ap-
pear
on
the
screen
.
When
t
he
READY-TRIG'D
light
is
out,
another
single
sweep
cannot b
e
d
isplayed
until
the
SGL
SWP
button
is
pressed
in
again
to
reset
the
Α
Trigger
circuit
.
16
.
Set
the
Α
SOURCE
switch to
EXT
.
Move
the
square-wave
signal
from
the
CH
2
input
connector
to
the
ΕΧΤ
INPUT
connector
.
17
.
Set
the
Α
TRIGGER
Mode
switch
to
Ρ
-
Ρ
AUTO
.
18
.
Set
the
CH
1
V
OLTS/DIV
switch
to
0
.5
V
(1X)
and
ad
just
the
output
of
the
square-wave
generator
to
provi
de
α
4-division
d
isplay
.
Adjust the
Α
TRIGGER
LEVEL
control
for
α
stable
d
isplay
and
n
ote the
range
over
which
α
stable
display
can
be
obtained
(for
comparison
in
step
20)
.
19
.
Set
the
Α
ΕΧΤ
COUPLING
switch
to
DC-
-
10
.
U
sing
the
Delayed-Sweep
Controls
1
.
Set
the
Β
SEC/DIV
switch
to
50
As
.
2
.
Select
ALT
HORIZONTAL
MODE
.
Ensure
that
the
Β
TRIGGER
LEVEL
control
is
fully
clockwise
(
Β
RUNS
AFTER
IDLY)
and
that
the
Β
DELAY
TIMEPOSITION
control
is
fully
counterclockwise
.
3
.
Adjust the
Β
I
NTENSITY
control
for
desired
Β
Sweep
display
brightness
.
4
.
Adjust
the
Channel
1
POSITION
and
the
Α
/
Β
SWP
SEP
controls
as
r
equired
to
display
the
Α
Sweep
(with
t
he
intensifie
d
zone)
above
the
Β
Delayed
Sweep
.
The
d
isplays
alternate
between
the
Α
Sweep
(upper)
and
the
Β
Delayed
Sweep
(Lower)
.
Adjust the
Α
and
Β
I
NTENSITY
controls
as
necessary
to
view
the
two
dis
p
lays
.
5
.
Observe
that
the
intensifie
d
zone
is
approximately
one
d
ivision
in
length at
the
start
of
the
Α
Sweep
and
t
hat
the
Β
Delayed
Sweep
displays
the
intensifie
d
portion
of
the
Α
Swee
p
.
6
.
Rotate
the
Β
DELAY
TIME POSITION
control
;
the
intensified
zone
of
the
Α
Sweep
and
the
display
of
the
Β
Delayed
Sweep
will
move
continuously
across
the
ε
rt
screen
.
7
.
Select
the
Β
H
ORIZONTAL
MODE
and
observe
that
only
the
Β
Delayed
Sweep
is
now
d
isplaye
d
on
the
crt
20
.
Observe
that
adjustment
of
the
Α
T
RIGGER
LEVEL
screen
.
control
p
rovides
α
triggered
dis
p
lay
over
α narrower range
than
in
preceding
step
18,
indicating trigger-signal
attenuation
.
8
.
Observe
that
the
d
isplay
moves
continuously
across
the
crt
screen
as
the
Β
DELAY
TIME
POSITION
control
is
rotate
d
.
R
eturn
the
Β
DELAY
TIME
POSITION
control
to
21
.
Move
the
s
q
uare-wave
signal
from
the
ΕΧΤ
INPUT
the
fully
counterclockwise
p
osition
.
connector
to
the
CH
2
input
connector
.
Set
the
Α
SOURCE
switch to
ΙΝΤand
adjust
the
Α
T
RIGGERLEVEL
control
to
the
mid
range
position
.
9
.
Select the
ALT
HORIZONTAL
MODE
and
set the
Β
SEC/DIV
switch
to
0
.5
ms
.

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Tektronix 2235 Specifications

General IconGeneral
Bandwidth100 MHz
Channels2
Vertical Sensitivity2 mV/div to 5 V/div
Maximum Input Voltage400 V (DC + AC peak)
Rise Time3.5 ns
Vertical Resolution8 bit
Input Impedance1 MΩ || 20 pF
Power Requirements90 to 250 V AC, 48 to 440 Hz
Trigger ModesAuto, Normal, Single
DisplayCRT
Weight17 lb (7.7 kg)

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