TB 9-6625-2163
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).
Mode 4 Decoder Characteristics
a. Performance Check
(1) Connect equipment as shown in figure 4.
(2) Set switches as listed in (a) through (d) 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:
(a) VHIGH ----------- 4.000V.
(b) VLOW ------------ 0mV.
(c) WIDTH ----------- 500.0ns.
(d) DELAY ----------- 65.00s.
(e) LEAD and TRAIL -- 1.00ns.
(f) PERIOD ---------- 4.400ms.
(g) TRIGGER MODE ---- Single.
