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Tektronix Telescope 1502C Manual de usuario Pagina 94

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Appendix B: Operator Performance Checks
B–6
1502C MTDR User Manual
O
F
F
O
F
F
O
F
F
O
N
ac –2.000 ft
Waveform
Figure B–8: Waveform at the Bottom of the Display
If the instrument fails this check, it can still be usable for measurements of large
faults that do not require a lot of gain, but send the instrument to be serviced
when possible. A great deal of noise reduction can be made using the NOISE
FILTER control.
1. Adjust the
n
o
POSITION control to obtain 100.000 ft (30.500 m) in the
distance window.
O
N
ac 100.000 ft
O
F
F
O
F
F
O
F
F
Figure B–9: Waveform with Gain at 5.00 mr/div
2. Using the
n
o
POSITION control and VERT SCALE control, set the gain to
5.00 mr/div. Keep the waveform centered vertically in the display.
3. Press MENU.
4. Using the
n
o
POSITION control, select Diagnostics Menu.
5. Press MENU again.
6. Using the
n
o
POSITION control, select Service Diagnostic Menu.
3. Noise Check
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