Tektronix 2213 Operator's Instruction Manual

2213 Operators
CHANNEL 1
(REFERENCE)
CHANINEL 2
MEASURE
TIME FROM
@TO@
HORIZONTAL ’
;_ DIFFERENCE 7
465/DM-O-16
Figure 19. High-resolution phase difference.
Amplitude Comparison
In some applications it may be necessary to establish
a set of deflection factors other than those indicated by
the
VOLTS/DIV switch settings. This is useful for com-
paring unknown signals to a reference signal of known
amplitude. To accomplish this, a reference signal of known
amplitude is first set to an exact number of vertical
divisions by adjusting the
VOLTS/DlV switch and Variable
control. Unknown signals can then be quickly and
accurately compared with the reference signal without
disturbing the setting of the
VOLTS/DlV Variable control.
The procedure is as follows.
1. Preset instrument controls and obtain a baseline
trace.
2. Apply the reference signal to either vertical channel
input and set the VERTICAL MODE switch to display the
channel used.
3. Set the amplitude of the reference signal to an exact
number of vertical divisions by adjusting the
VOLTS/DIV
switch and VOLTS/DIV Variable control.
4. Establish a vertical conversion factor, using the fol-
lowing formula (reference signal amplitude must be known):
Vertical
Conversion =
reference signal amplitude (volts)
Factor
vertical
VOLTS/DIV
deflection x switch
(divisions)
setting
5. Disconnect the reference signal and apply the
unknown signal to be measured to the same channel input.
Adjust the
VOLTS/DIV switch to a setting that provides
sufficient vertical deflection to make an accurate measure-
ment. Do not readjust the
VOLTS/DlV Variable control.
6. Establish an arbitrary deflection factor, using the
following formula:
Arbitrary
vertical
VOLTS/DIV
Deflection = conversion x
switch
Factor
factor
setting
7. Measure the vertical deflection of the unknown signal
in divisions and calculate its amplitude using the following
formula:
Unknown arbitrary
vertical
Signal
= deflection x deflection
Amplitude factor
(divisions)
EXAMPLE: The reference signal amplitude is 30 V,
with a
VOLTS/DIV switch setting of 5 and the VOLTS/
DIV Variable control adjusted to provide a vertical
deflection of exactly 4 divisions,
Substituting these values in the vertical conversion factor
formula:
Vertical
Conversion =
30 v
4 div x 5
V/div
= 1.5
Factor
Continuing, for the unknown signal the
VOLTS/DIV
switch setting is 1, and the peak-to-peak amplitude spans
five vertical divisions. The arbitrary deflection factor is then
determined by substituting values in the formual:
Arbitrary
Deflection = 1.5 x 1
V/div = 1.5 V/div
Factor
The amplitude of the unknown signal can then be
determined by substituting values in the unknown signal
amplitude formula:
Amplitude
= 1.5
V/div x 5 div = 7.5 V
23

Tektronix 2213 Specifications

General

Brand	Tektronix
Model	2213
Category	Test Equipment
Language	English