Tektronix 1503C, User Manual, Page: 95 / 128

Appendis B: Operator Performance Checks
1503C MTDR User Manual
B–3
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bat 10.00 ft
Figure B–3: Cursor at End of 10-foot Cable
4. Change the Vp to .30. Using the
n o
POSITION control, measure the distance
to the rising edge of the waveform at the open end of the cable. The distance
shown on the display distance window (upper right corner of the LCD) should
be from 3.50 to 3.70 feet (1.05 to 1.11 m).
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bat 3.60 ft
Figure B–4: Cursor at End of 10-foot Cable, Vp Set to .30
5. Remove the 10-foot cable and connect the 50 terminator. Change the 1503C
front-panel controls to:
VERT SCALE 0.00 dB
DIST/DIV 5000 ft/div (1000 m/div)
PULSE WIDTH 1000 ns
6. Turn the
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POSITION control clockwise until the display distance window
reads a distance greater the 50,000 feet (15,259 m). The waveform should
remain a flat line from zero to this distance.