TB 9-6625-2309-35
0 km
4 km
8 km
V-OFFSET: 0.00 dB
CORRECT LEADING
EDGE POSITION
0. 0
16. 0
32. 0
↑ 8.0 dB / div
4. 0 m / div →
A = 2, 431. 9 m
INDEX: 1. 4990
B = 4, 927. 9 m
λ: 850 MM
PW: 150 ns
A→B = 2, 495.9 m
# AVG = 4, 048. 0
2-POINT LOSS: -1.50 dB
Figure 1. Example of
correct leading edge position of
dead zone pulse (TD-260C).
(5) If leading edge is not visible or is located to right of the origin (dashed lines,
figure 2), set ON-OFF switch to
OFF and
repeat steps (1) through (4) above.
c.
Connect equipment as
shown in
figure 3, CONNECTION A.
Connect optical fiber
jumper cable from FOCUS-SWCM OPTICAL I-O to ST CONNECTOR ADAPTER attached
to OPTICAL INPUT of LIGHTWAVE MULTIMETER (fig. 3).
0 km
4 km
8 km
V -O F F S E T : 0.00 dB
L E A D IN G E D G E
N O T V IS IB L E
LE A D IN G E D G E LO C A T E D
T O R IG H T O F O R IG IN
0. 0
16. 0
32. 0
↑ 8.0 dB / div
4. 0 m / div →
A = 2, 431. 9 m
INDEX: 1. 4990
B = 4, 927. 9 m
λ: 850 MM
PW: 150 ns
A→B = 2, 495.9 m
# AVG = 4, 048. 0
2-POINT LOSS: -1.50 dB
Figure 2. Example: Example of
incorrect leading edge position of
dead zone pulse (TD-260C).
6