Tektronix 5110, Инструкция по эксплуатации

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Operating lnstructions-5110
5. Adjust the horizontal Position control to move the
10% point of the waveform to the second vertical line of the
graticule.
6. Measure the horizontal distance between the 10%
and 90% points. Be sure the variable Seconds/Div control
is in the Cal position.
7. Multiply the distance measured in step 6 by the
setting of the Seconds/Div switch.
EXAMPLE: Assume that the horizontal distance
between the 10% and 90% points is four divisions and the
Seconds/Div switch is set to 1 µs.
Using the period formula to find risetime:
Risetime
period
horizontal Sec/Div
distance X switch — (4) (1 µs) - 4 µs
(divisions) setting
The risetime is 4 microseconds.
4. Connect the reference signal to the Channel 1 input
connector and the comparison signal to the Channel 2 (or
center plug-in) input connector. The reference signal
should precede the comparison signal in time. Use coaxial
cables or probes which have similar time-delay
characteristics to connect the signal to the input connec­
tors.
5. If the signals are of opposite polarity, invert the
Channel 2 (or center plug-in) display. (Signals may be of
opposite polarity due to 180° phase difference; if so, take
this into account in the final calculation.)
6. Set the Volts/Div switches to produce about four
divisions of display waveform.
7. Set the time-base triggering controls for a stable
display. Set the Seconds/Div switch for a sweep rate which
shows three or more divisions between the measurement
points, if possible.
8. Adjust the vertical Position controls to bring the
measurement points to the center horizontal reference
line.
9. Adjust the horizontal Position control so the
Channel 1 (or left plug-in) waveform (reference) crosses
the center horizontal line at a vertical graticule line.
10. Measure the horizontal distance between the two
measurement points (see Fig. 1-7).
Time Difference Measurements
When used in conjunction with a calibrated time-base
plug-in unit, the multi-trace feature of the oscilloscope
permits measurement of time difference between two or
more separate events. To measure ti me difference, use the
following procedure:
1. Set the input coupling switches of the amplifier
channels to either ac or de.
2. Set the Display switch on the time-base unit to either
Chop or Alt. In general, Chop is more suitable for low-
frequency signals. More information on determining the
mode is given under Vertical Display Mode in thissection.
3. Set the vertical plug-in triggering switches to trigger
the display on Channel 1 (or left plug-in) and Channel 2 (or
center plug-in). Fig. 1-7. Measuring time difference between two pulses.
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