TB 9-6625-2309-35
(18) Adjust CURSOR A control to place cursor A on peak (or approximate middle if
no peak is evident) of TI dead zone pulse (fig. 10) or peak of dead zone pulse if peak is evident
(TD-260C and TD-261C optical modules) (fig. 11). Record A= distance indicated on TI
display on appropriate Reference Cursor Position Data Sheet (appendix A).
0 km
4 km
8 km
A
V-OFFSET: 0. 00 dB
0. 0
16. 0
32. 0
↑
4. 0 m / div →
8. 0 dB / div
A = 7, 567. 8 m
INDEX: 1. 4990
B = 8, 047. 8 m
λ: 850 MM
PW: 150 ns
A→B =
480. 0 m
# AVG = 4, 096. 0
2-POINT LOSS: 0. 00 dB
Figure 10. Example of
cursor A on
approximate middle of
dead zone pulse
with no peak evident (TD-260C shown for example).
0 km
4 km
8 km
A
0. 0
53. 0
117. 0
↑
16. 0 m / div →
4. 0 dB / div
A=
53. 0 m
INDEX: 1. 4990
B = 8, 063. 8 m
λ: 1300 MM
PW:
500 ns
A→B = 8, 010. 8 m
# AVG = 4, 096. 0
2-POINT LOSS: 31. 99 dB
Figure 11. Example of
cursor A on
peak of
dead zone pulse-
(TD260C).
20