Tektronix 1503C, Руководство пользователя, Страница: 101 / 128

Appendis B: Operator Performance Checks
1503C MTDR User Manual
B–9
20. Place the baseline of the waveform on the center graticule using the
n
o
POSITION control.
21. Increase VERT SCALE to 30.00 dB.
22. Using the
n o
POSITION control, verify that the aberrations are less than four
divisions high out to 30 feet (9.15 m)
O
F
F
O
F
F
O
F
F
O
N
ac 30.00 ft
Figure B–13: Aberrations Less Than Four Divisions Out to 30.00 ft
23. Return the cursor to –2.00 ft (–0.61 m).
24. Turn NOISE FILTER back to VERT SET REF.
25. Set the DIST/DIV to 50 ft/div (10 m/div).
26. Turn PULSE WIDTH to 100 ns.
27. Adjust the pulse height to four major divisions.
O
F
F
O
F
F
O
F
F
O
N
ac
–2.00 ft
Figure B–14: Pulse Adjusted to Four Major Divisions in Height
28. Press STORE.
29. Return the NOISE FILTER control to 1 avg.