TB 9-6625-2309-24
Figure 20. Placement of cursor A to get reference position (TD-260C).
(9) Record A= distance in meters displayed on crt.
NOTE
Take care not to move cursor A from this reference position. If
cursor A is moved, reference position must be reestablished.
d. Remove fiber test box from test setup and connect equipment as shown in
Connection A (fig. 21) below.
e. Perform steps (1) through (7) below:
(1) Ensure FOCUS-SWCM POWER OFF ON key control switch is set to ON.
(2) Ensure digital delay/pulse generator POWER ON-OFF pushbutton is set to ON.
(3) Ensure lightwave multimeter power pushbutton is set to ON.
(4) Allow 15 minutes for test equipment to warm-up and stabilize.
(5) Set lightwave multimeter to measure optical power in dBm at 850 nm
wavelength or nominal wavelength to be tested.
(6) Set FOCUS-SWCM LD BIAS CURRENT switch to LD PULSED.
(7) Set FOCUS-SWCM SWITCHED ATTN switch to OUT.
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