ntp/util/tg.c

2  * tg.c generate WWV or IRIG signals for test
6  * broadcast timecode. Alternatively, it can generate the IRIG-B
8  * intended to test the WWV/H driver (refclock_wwv.c) and the IRIG
26  * switches to IRIG-B format.
40  * or IRIG timecode (20 digits) as each new string is constructed. The
44  * For IRIG the on-time marker M preceeds the first (units) bit, so its
68 #define	IRIG	1		/* IRIG-B encoder */
75 #define	M2	2		/* IRIG 0 pulse */
76 #define	M5	5		/* IRIG 1 pulse */
77 #define	M8	8		/* IRIG PI pulse */
193  * IRIG format except first frame (1000 Hz, 20 digits, 1 s frame)
209  * IRIG format first frame (1000 Hz, 20 digits, 1 s frame)
287 			encode = IRIG;
388 	 * For IRIG the signal generator runs every second, so requires
391 	case IRIG:
399 	 * once per minute for WWV/H and once per second for IRIG.
441 		if (encode == IRIG) {
455 		 * The IRIG second consists of 20 BCD digits of width-
459 		case IRIG: