Tektronix 070-7169-05, User Manual

Page: 94 / 127

Appendix B: Operator Performance Checks
1502C MTDR User Manual
B–5
O
F
F
O
F
F
O
F
F
O
N
ac –2.000 ft
Figure B–6: Flat-Line Display at –2.000 ft
This last step has set up the instrument for the next check.
If the instrument fails this test, it can be used, but should be serviced when
possible. Not all of the waveforms will be viewable at all gain settings.
1. Using the
n
o
POSITION control, verify that the entire waveform can be
moved to the very top of the display (off the graticule area).
O
F
F
O
F
F
O
F
F
O
N
ac –2.000 ft
Waveform
off display
Figure B–7: Waveform Off the Top of the Display
2. Using the
n
o
POSITION control, verify that the entire waveform can be
moved to the very bottom of the display (to the bottom graticule line).
2. Vertical Position
(Offset) Check