Tektronix 2235 Operator's Manual

Operating Procedures-2235 ΑΝ /USM-488
Operators
6 . Select ADD VERTICAL MODE and pull out the Chan-
nel 2
POSITION control k nob to invert the Channel 2 d
is-
p
lay . Slightly rea d just the CH 2 V OLTS/DIV Variable control
for
maximum
cancellation of the und esired signal compo-
nent
(see
F
igure
4-4
Β ) .
Amplitu de Comparison (Ratio)
In some applications it may b e n ecessary to
establish α
set of deflection factors other than those indicated
by the
V OLTS/DIV switch settings . This is useful for comparing
u nknown signals to α reference signal of known amplitude .
To accom p lish t his, α reference signal of known amplitu de is
first set to an exact number of vertical d ivisions by adjusting
the V OLTS/DIV switch and V ariable control . Unknown sig-
nals can then be quickly and accurately compared with t he
reference
signal
without disturbing the setting of the
V OLTS/DIV
Variable control . This procedure is as follows :
1 .
Preset instrument controls and obtain α b aseline
trace .
2 . Apply t he reference signal to either vertical channel
input
and set the VERTICAL MODE switch to d is p lay the
channel used .
3 . Set the amplitude of the reference signal to five verti-
cal d
ivisions
by adjusting the V OLTS/DIV switch and
V OLTS/DIV Variable control .
4 .
Disconnect the reference signal and app ly the un-
known
signal
to
b
e measured to the same channel input .
Adjust the vertical position
of the waveform so that its b ot-
tom edge j ust touches the
0%
line
on the crt .
5 . H orizontally p
osition the waveform so that its top-
most features
cross
the
center vertical graticule line (see
Figure 4-5) .
6 . R ead the p ercent ratio
directly from the graduations
of the center line, r eferring to the
0% and 100% marks on
the left edge of the graticule
(1
minor
division equals 4% for
α 5- d ivision d is p lay) .
Time Duration
To measure time b etween two points
on α waveform,
u
se
the
following procedure :
1 .
Preset instrument controls and o btain α
baseline
Substituting the given values :
trace .

Time Duration = 8 .3 d iv χ 2 ms/div = 16 .6 ms
N O ND EL AY E D TIME ME
AS UREMEN TS
=MMENEEN1
=I
OWN
11111111111111111110
on MENEM
MENU
ME
NU
1111111110 NONE
Figure 4-5 . V oltage ratios .
4732-10
2 . Apply t he signal to either vertical-channel input con-
nector and set the VERTICAL
MODE switch to display the
channel
use d .
3 . Adjust
the Α
TRIGGER LEVEL control to obtain α sta-
ble d isplay
.
4 . Set the Α
SEC/DIV switch to d isplay one complete
p eriod of the waveform .
Ensure that the SEC/DIV Variable
control is in the CAL
d etent .
5 . Position the
dis p lay to p lace the time-measurement
p oints
on
the
center horizontal graticule line (see Figure 4-6) .
6 . M easure the h orizontal
distance b etween the time-
measurement p oints .
7 . Calculate time duration using the following
formula :
h orizontal

Α SEC/DIV
distance χ switch
Time -_ (division)

setting
Duration

magnification
factor
EXAMPLE : The distance between the
time measurement
p oints is 8 .3 divisions (see Figure 4-6),
an d t he Α
SEC/DIV switch is set to 2 ms per d ivision . The
X10
M agnifier is off (knob in) .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English