TB 9-6625-2197-40
(a) Display to CH 2.
(b) TRIGGER SOURCE to 2.
(c) TIME/DIV to 500 ns.
(d) Press Autostore pushbutton to STORE and press ERASE pushbutton.
NOTE
Press and release TI LAMP TEST pushbutton to initiate
MODE 4 simulated word.
(48) Press and release LAMP TEST pushbutton and adjust radar test set
oscilloscope HORIZONTAL position control for a waveform similar to figure 6, inset E.
(49) Measure MODE 4 (SUM) pulse width. If pulse width is not between 0.4 and
0.6 s, perform b (3) below.
(50) Measure pulse spacing. Pulse spacing will be between 1.8 and 2.2 s.
(51) Set control box PWR switch to OFF.
(52) Connect TI as shown in figure 5, CONNECTION B.
(53) Press radar test set oscilloscope ERASE pushbutton then press Autostore
pushbutton to STORE.
(54) Set control box PWR switch to ON and press LAMP TEST pushbutton.
NOTE
Radar test set oscilloscope trigger level may need to be
readjusted to view the small amplitude waveform.
(55) Measure MODE 4 (DIFF) pulse width. If pulse width is not between 0.4 and
0.6 s, perform b (4) below.
b. Adjustments
(1) Adjust A3R32 (fig. 7) for a SUM pulse width between 0.7 and 0.9 s.
(2) Adjust A3R34 (fig. 7) for a DIFF pulse width between 0.7 and 0.9 s.
NOTE
MODES 1, 2, 3, and C have common adjustments A3R32 for
SUM pulses and A3R34 for DIFF pulses. (Adjust these
resistors for best compromise.)
(3) Adjust A3R33 (fig. 7) for a pulse width between 0.4 and 0.6 s.
(4) Adjust A3R35 (fig. 7) for a pulse width between 0.4 and 0.6 s.
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