TB 9-6625-2235-24
(11) BASELINE CLIPPER control to OFF position.
(12) VIDEO FILTER control to OFF position.
e. Position display mainframe controls as listed in (1) through (5) below:
(1) DISPLAY switch to INT.
(2) MAGNIFIER switch to X1.
(3) SCALE (180TR, 182T) control to OFF.
(4) PERSISTENCE (181T/TR) control to MIN.
(5) DISPLAY MODE (180T/TR) switch to WRITE.
f. Position crt trace on horizontal graticule line near crt center with VERTICAL
POSN control and reduce amount of intensity to prevent burning crt phosphor.
g. Set SWEEP TIME/DIV switch to MAN and center crt dot with MAN SWEEP control.
CAUTION
A high intensity dot left on crt for prolonged periods can burn
the phosphor.
h. Adjust FOCUS and ASTIG controls for smallest round dot possible.
i. Set SWEEP TIME/DIV switch to AUTO and increase amount of intensity for an
optimum crt trace.
j. Center crt trace with HORIZONTAL POSITION control. Adjust HORIZ GAIN
control (located on TI rear panel) for exactly 10 divisions.
k. Position crt trace parallel to horizontal graticule line with TRACE ALIGN control,
and adjust VERTICAL POSN control to align crt trace with bottom graticule line.
l. Center LO feedthrough signal on crt with TUNING control and press
m. Set FREQ SPAN/DIV switch to 200 kHz and press FREQUENCY CAL
pushbutton.
n. Position signal peak near top crt graticule line with REF LEVEL FINE control.
o. Center LO feedthrough signal on crt with TUNING control and adjust
FREQUENCY ZERO control for 00.0 MHz indication on FREQUENCY MHz
readout display.
p. Set FREQ SPAN/DIV switch to 1 MHz and REF LEVEL FINE control to 0.
q. Adjust TUNING control for FREQUENCY MHz indication of approximately 280 MHz.
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