TB 9-6625-2340-35
(85) Adjust A4A4R49 (fig. 19) to align markers on TI display. MKR ∆ level should
indicate 1.00X.
(86) Disconnect 97 (white/violet) cable from A4A6J1 (fig. 9).
(87) Connect 97 (white/violet) cable to A4A8J1 (fig. 13).
(88) Connect 89 (gray/white) cable to A4A6J1 (fig. 9).
(89) Press TI keys as listed in (a) through (d) below:
(a)
MARKER NORMAL.
(b)
RES BW, 1, MHz.
(c)
FREQUENCY SPAN, 200, kHz.
(d)
REFERENCE LEVEL.
(90) Adjust TI DATA knob to position trace at (or just below) reference level (top)
graticule line.
(91) Adjust A4A8C32 and A4A8C46 (fig. 13) for maximum MKR LVL as by TI
annotation.
(92) Remove short from A4A9TP1 and A4A9TP2 (fig. 8).
(93) Press TI MARKER ∆ key.
(94) Reinstall short between A4A9TP1 and A4A9TP2 (fig. 8).
(95) Adjust A4A8R35 (fig. 13) to align markers on TI display. MKR ∆ LVL indication
should be 1.00X.
(96) Remove short from A4A9TP1 and A4A9TP2 (fig. 8).
(97) Press TI keys as listed in (a) through (c) below:
(a) MARKER OFF.
(b) RES BW, 30, kHz.
(c) FREQUENCY SPAN, 100, kHz.
(98) Connect 21.4 MHZ CRYSTAL FILTER BYPASS NETWORK(S) (fig. 18) between
A4A8TP1 and A4A8TP2 (fig. 20).
Figure 20. A4A8 board.
(99) Adjust A4A8C44 (fig. 20) to center signal on center vertical graticule line.
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