I Ntrod Uctio N; Voltage Measurements; Television Displays - Tektronix 2213A Operator's Manual

I
N
T
R
OD
U
CTIO
N
After
b
ecoming familiar with
t
he capabilities of the 2213 Α
Oscilloscope an operator can then easily develop conve-
nient methods for making
p
articular measurements . The in-
formation in this section is designed to enhance operator
understanding and to assist in developing efficient tech-
ni ques for making specific measurements . Recommended
methods for making basic measurements with your instru-
ment are described in the
p
rocedures contained in
t
his
section.
When α
p
rocedure first calls for presetting instrument
controls and obtaining α
b
aseline trace, refer to the "Oper-
ator's Adjustments"
p
art in Section 3 and perform steps 1
through 4
u
nder "Baseline Trace" .
IN
D
E
X TO
B
ASIC
A
PPL
ICATIO
N PR
OC
E
D
URE
S
V
OLTAGE MEASUREMENTS . . . . . . . . . . . . . . . . . 4-1
AC Peak-to-Peak Voltage
. . . . . . . . . . . . . . . . . . 4-1
Instantaneous
V
oltage . . . . . . . . . . . . . . . . . . . . .
4-2
Algebraic Addition . . . . . . . . . . . . . . . . . . . . . . . . .
4-3
Common-Mode Rejection . . . . . . . . . . . . . . . . . . . 4-3
Amplitude Comparison . . . . . . . . . . . . . . . . . . . . . 4-4
TIME MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . 4-4
Time Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Time Difference
B
etween Pulses On Time
Related Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Phase Difference . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
TELEVISION DISPLAYS . . . . . . . . . . . . . . . . . . . . . . 4-8
TV Line Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
TV Field Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
DELAYED-SWEEP MAGNIFICATION . . . . . . . . . . . . 4-9
V
O
L
TAG
E ME
AS
UREMEN
TS
AC
P
eak-to-Peak Voltage
To make α peak-to-peak voltage measurement, use the
following procedure:
ΝΟΤΕ
This
p rocedure may also be used to mak e voltage
measurements
b etween any two
p
oints on the
waveform .
1 . Preset instrument controls and obtain α baseline
trace.
2. Apply
t he ac signal to either vertical-channel in p ut
connector and set the VERTICAL MODE switch to display
the channel used .
3. Set the appropriate
V
OLTS/DIV switch to display
about five
d
ivisions of the waveform, ensuring that the
V
OLTS/DIV Variable control is in the CAL detent .
4. Adjust the TRIGGER LEVEL control to obtain α stable
display.
5. Set the SEC/DIV switch to α p osition that displays
several cycles of the waveform .
6.
V
ertically position the
d
isplay so that the negative
peak of the waveform coincides with one of the
h
orizontal
graticule lines (see Figure 4-1,
P
oint Α).
7 . Horizontally position the display so that one of the
p
ositive peaks coincides with
t
he center vertical graticule
line (see Figure 4-1,
P
oint Β).
8.
M
easure the vertical
d
eflection from
p
eak-to-peak
(see Figure 4-1, Point Α to
P
oint Β).