NetBSD/dist/ntp/README.refclocks

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This is a list of the #define REFCLK_* stuff.
If you want to add a new refclock let us know and we'll assign you a number.
Should this list also include the name of the party responsible for the
refclock?
LOCALCLOCK 1 /* external (e.g., lockclock) */
GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
WWV_PST 3 /* PST/Traconex 1020 WWV/H */
SPECTRACOM 4 /* Spectracom (generic) Receivers */
TRUETIME 5 /* TrueTime (generic) Receivers */
IRIG_AUDIO 6 /* IRIG-B/W audio decoder */
CHU_AUDIO 7 /* CHU audio demodulator/decoder */
PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
GPS_MX4200 9 /* Magnavox MX4200 GPS */
GPS_AS2201 10 /* Austron 2201A GPS */
GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
MSF_EES 14 /* EES M201 MSF Receiver */
GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
GPS_DATUM 17 /* Datum Programmable Time System */
NIST_ACTS 18 /* NIST Auto Computer Time Service */
WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
GPS_NMEA 20 /* NMEA based GPS clock */
GPS_VME 21 /* TrueTime GPS-VME Interface */
ATOM_PPS 22 /* 1-PPS Clock Discipline */
PTB_ACTS NIST_ACTS
USNO NIST_ACTS
GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
ARCRON_MSF 27 /* ARCRON MSF radio clock. */
SHM 28 /* clock attached thru shared memory */
PALISADE 29 /* Trimble Navigation Palisade GPS */
ONCORE 30 /* Motorola UT Oncore GPS */
GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
CHRONOLOG 32 /* Chrono-log K WWVB receiver */
DUMBCLOCK 33 /* Dumb localtime clock */
ULINK 34 /* Ultralink M320 WWVB receiver */
PCF 35 /* Conrad parallel port radio clock */
WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */
FG 37 /* Forum Graphic GPS */
HOPF_SERIAL 38 /* hopf DCF77/GPS serial line receiver */
HOPF_PCI 39 /* hopf DCF77/GPS PCI receiver */
JJY 40 /* JJY receiver */
TT560 41 /* TrueTime 560 IRIG-B decoder */
ZYFER 42 /* Zyfer GPStarplus receiver */
RIPENCC 43 /* RIPE NCC Trimble driver */
??????? 44 Claas Hilbrecht (20020711)