TB 9-6625-2283-35
(7) Adjust DIST/DIV control to 10 meters to expand trace.
(8) Press VERTICAL SCALE .5 dB/DIV pushbutton.
(9) Adjust VERTICAL POSITION control to center the trace on crt.
(10) Adjust MARKER control until marker on crt is on the shoulder of the first step
(best possible obtainable). Record LCD reading.
(11) Adjust DIST/DIV control to 50 meters.
(12) Adjust MARKER control until marker is on second step from the left on the
trace (fig. 1).
(13) Adjust DIST/DIV control to 10 meters.
(14) Adjust MARKER control until marker on crt is on the shoulder of the second
step (best position obtainable). Record LCD reading.
(15) Adjust DIST/DIV control to 100 meters (or position required to obtain third step
on crt) (fig. 1).
(16) Adjust VERTICAL POSITION control as required to display third step of the trace.
(17) Adjust MARKER control until marker on crt is at the third step from the left on
the trace.
(18) Adjust DIST/DIV control to 10 meters. (Adjust VERTICAL POSITION control
as required to center the trace on the crt.)
(19) Adjust MARKER control until marker on crt is on the shoulder of the third step
(best position obtainable). Record LCD reading.
(20) Adjust DIST/DIV control to 100 meters, or to a position required to view the end
of the fiber trace (a large spike at the end of the trace) (fig. 1). Adjust MARKER control
until marker on crt is at the leading edge of the spike.
(21) Adjust DIST/DIV control to 10 meters.
5
