Tektronix 1503C, Руководство пользователя, Страница: 54 / 128

Operator Tutorial
2–12
1503C MTDR User Manual
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ac 10.00 ft
Figure 2–18: Incident and Reflected Pulses with Cursor at 10.0 ft
4. Press STORE.
5. Turn the NOISE FILTER control to 1 avg. Note that the distance window now
reads 0.00 ft . This means that everything from the front panel BNC to the end
of the cable is subtracted from the distance calculations. You have set zero at the
far end of the test cable.
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ac 0.00 ft
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Figure 2–19: New Zero Set at End of Test Cable
6. To change the HORZ SET REF position, turn the NOISE FILTER back to
HORZ SET REF and repeat the above procedure with a new cursor location.
7. To exit HORZ SET REF, do the following:
a. Set the
n o
POSITION control to exactly 0.00 ft (you might have to set
DIST/DIV to 1 ft/div).
b. Push STORE.
c. Turn the NOISE FILTER control to the desired noise setting.
This control is nearly the same as HORZ SET REF except it sets the vertical zero
reference. It would be helpful to read the section of VERT SET REF in the Operation
Instructions chapter to give you some technical background.
VERT SET REF