TB 9-6625-2163-24
(7) Set RTS MENU 16 TO PULSE to 1. Measure width of first pulse (select
PULSE WIDTH and press ENTER on keypad). Measure width of second pulse (change
MENU 16 PULSE# to 2 and TO PULSE to 2, then select WIDTH and press ENTER on
keypad). If width of both pulses is not between 0.7 and 0.9 s perform b (7) below.
(8) Set ISLS switch to ON and verify pulse width of ISLS pulse is between 0.7 and 0.9 s.
b. Adjustments
(1) Adjust A5R1 (fig. 2) until spacing between first and third pulse is 3 s (R).
(2) Set MODE switch to 2. Adjust A5R2 (fig. 2) until spacing between first and third
pulse is 5 s (R).
(3) Set MODE switch to 3/A. Adjust A5R3 (fig. 2) until spacing between first and
third pulse is 8 s (R).
(4) Set MODE switch to TEST. Adjust A5R5 (fig. 2) until spacing between first and
third pulse is 6.5 s (R).
(5) Set MODE switch to C. Adjust A5R4 (fig. 2) until spacing between first and
third pulse is 21 s (R).
(6) Set ISLS switch to ON. Adjust A4R22 (fig. 2) until spacing between first and
second pulse is 2 s (R).
(7) Adjust A4R41 (fig. 2) until width of first pulse is 0.8 s, and for second pulse
adjust A4R29 (fig. 2) (R).
18. Mode 4 Decoder Characteristics
a. Performance Check
(1) Connect equipment as shown in figure 4.
(2) Set switches as listed in (a) through (c) below:
(a) FUNCTION switch to SYSTEM.
(b) MODE switch to 4.
(c) ISLS switch to OFF.
(3) Position pulse generator controls as listed in (a) through (i) below:
VHIGH ----------- 4.000V.
(a)
VLOW ------------ 0mV.
(b)
WIDTH ----------- 500.0ns.
(c)
DELAY ----------- 65.00 s.
(d)
LEAD and TRAIL -- 1.00ns.
(e)
PERIOD ---------- 4.400ms.
(f)
TRIGGER MODE ---- Single.
(g)
LEVEL ---------- 0.50V.
(h)
SLOPE ---------- Positive.
(i)
