Tektronix TDS6404, Руководство по обслуживанию

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Performance Tests
TDS6000 Series Service Manual
4- 65
H
CHECK that the Lower Limit readout, after the oscilloscope loses
triggering, is within 3.5 ns to 6.5 ns, inclusive.
H
Enter the time on the test record.
H
Use the keypad to return the Lower Limit to 2 ns and reestablish
triggering.
H
Touch Upper Limit ; then use the multipurpose knob to slowly
decrease the Upper Limit readout until triggering is lost.
H
CHECK that the Upper Limit readout, after the oscilloscope loses
triggering, is within 3.5 ns to 6.5 ns, inclusive.
H
Enter the time on the test record.
Set upper and lower
limits that ensure
triggering. Then
change limits until
triggering stops.
Figure 4- 25: Measurement of time accuracy for pulse and glitch triggering
3. Confirm the trigger system is within time-accuracy limits for pulse-glitch or
pulse-width triggering (time range >520 ns
) :
a. Set upper and lower limits that ensure triggering at 250 kHz:
H
Touch Upper Limit . Use the keyboard to set the upper limit to 4 s.
H
Touch Lower Limit . Use the keypad to set the lower limit to 500 ns.
b. Display the test signal:
H
Set the Horizontal SCALE to 4 s.