TB 9-6625-2309-35
NOTE
Take care not to move CURSOR A control during
measurements to reduce error. If CURSOR A control is moved,
reposition cursor until TI displays A = recorded position again.
Doing this will reestablish same optical power reference level
as before and calibration may continue with no additional
error.
(19) Press HOR CONT pushbutton for maximum horizontal contraction.
(20) Press DISPLAY FROM pushbutton to select B.
(21) Adjust CURSOR B control to place cursor B in approximate middle of flat
portion on top of FOCUS generated pulse (fig. 12). Record B= distance indicated on TI
display on TD-260C (850 nm) Reference Cursor Position Data Sheet (appendix A).
0 km
4 km
8 km
B
A
0. 0
4, 095. 9
8, 191. 8
↑
1, 024. 0 km / div →
8. 0 dB / div
A=
11. 0 m
INDEX: 1. 4990
B = 5, 551. 9 m
λ: 850 MM
PW:
150 ns
A→B = 5, 540. 5 m
# AVG = 4, 096. 0
2-POINT LOSS: 3. 61 dB
Figure 12. Example of
cursor B
placement in
center flat portion on
FOCUS generated pulse (TD-260C).
NOTE
Take care not to move CURSOR B control during
measurements to reduce error. If CURSOR B control is
moved, reposition cursor B so TI displays B = recorded
reference cursor position again. This will reestablish same
measured power level on FOCUS generated pulse as before
(22) Perform (a) and (b) below:
(a) Press TI LOSS MODE pushbutton to select 2 POINT.
21