TB 9-6625-2309-24
c. To establish reference cursor position value perform steps (1) through (9) below:
(1) Press PULSE WIDTH pushbutton as required to select SHORT.
(2) Ensure INDEX is set to 1.4990.
NOTE
To change index value, press and hold N/LASER pushbutton
and adjust CURSOR A control to set INDEX to new value.
(3) Press DISPLAY FROM pushbutton as required to select ORIGIN.
(4) Press FAST SCAN pushbutton and wait for LASER ON/AVG to indication on
TI display to go off.
NOTE
It may be necessary to press HOR CONT or HOR EXP
pushbuttons in order to view REFLECTIVE EVENT (fig. 19).
(5) Adjust CURSOR A control to place cursor A at leading edge of REFLECTIVE
EVENT (fig. 19).
Figure 19. Course placement of cursor A after completing fast scan (TD-260C).
(6) Press DISPLAY FROM pushbutton as required to select A.
(7) Press HOR EXP pushbutton as required to display 4.0 m/div on crt.
(8) Adjust CURSOR A control to carefully adjust cursor A to beginning of reflective
event as shown in figure 20.
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