Tektronix 3B2 TIME-BASE Instruction Manual page 9

SECTION 3
APPLICATIONS
Introduction
Since the Type 3B2 can be used with a digital readout
unit, many applications are described in the digital read-
Type 3B2 is used without a digital readout unit, the follow-
ing applications may be helpful. .
Thus, the time interval between points on a display can be
measured (within 3%) by counting the horizontal graticule
ing this by the setting of the TIME/DIV switch. However,
2. Use a vertical graticule line as a reference and move
Time measurements may also be used for frequency
functions, the frequency of any signal is the reciprocal of the
period (time) of 1 cycle. For example, if the time for ] cycle
3. Divide this number by 10 times the TIME/DIV switch
setting. This is the frequency of the waveform,
Sweep delay can also be used to measure frequency as
1. Measure the time length of 1 cycle as described under
"Time Measurements".
2. The reciprocal of step 1 is the frequency.
Phase-Shift Measurement
To measure the phase difference between two sine waves,
proceed as follows:
1, Connect each signal to a separate input channel on the
dual-trace amplifier. Adjust the Type 3B2 to display at
2. Set the dual-trace amplifier for chopped-mode opera-
tion triggered from Channel 1.
3. Use the DELAY TIME switch and multiplier dial to
measure the time of 1 cycle.
4. Similarly, measure the horizontal time difference be-
tween the same points on the Channel 1 and 2 displays.
5. Divide the time measured in step 4 by the time meas-
ured in step 3, and multiply the result by 360°. This is
the phase difference between the two sine waves.
and five seconds later a return pulse occurs. Also assume
that the duration of the return pulse is Smsec. With an
1. Set the TIME/DIV switch to 1 SEC, and adjust the
switch to 1s, and the multiplier dial to 5.00.
will be displayed in a single sweep, 5 seconds after the
initial trigger pulse. The pulse can then be photographed,
if desired.