Tektronix Telescope 1502C Manual de usuario descargar pdf (Pagina 54)

Operator Tutorial

2–4

1502C MTDR User Manual

ac 3.000 ft

Open

Figure 2–3: Waveform with VERT SCALE Increased Showing an Open

5. The

POSITION control moves the waveform up and down the display.

Adjust this for best viewing.

6. Short the end of the cable with an electrical clip or other suitable device. See

the pulse take a dive? That is the classic signature of a short, a point of lower

impedance.

ac 3.000 ft

Short

Figure 2–4: Waveform with Short

The distance window still reads 3.000 ft. If the short is not directly across the

conductors of the BNC (e.g., needle nose pliers) the downward edge of the

waveform might be slightly past the cursor, indicating the length of the

shorting device (e.g., jumper wire).

7. Remove the short.

With a little practice, you will be able to identify many kinds of cable faults.

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Tektronix Telescope 1502C Manual de usuario Pagina 54