xref: /freebsd/contrib/ntp/clockstuff/README (revision faf25f48d601ae39f5752602f3020e2e92605625)
1README file for directory ./clockstuff of the NTP Version 4 distribution
2
3This directory contains the sources for utility programs designed to
4support radio clocks.  chutest.c is desgined to test the depredated
5chu_clk line discipline or STREAMS module and can also test a CHU
6modem in raw mode.
7
8You can make things in here by typing one or more of:
9
10	make propdelay (or `make')
11	make chutest
12
13Propdelay computes high frequency propagation delays, given the
14longitude and latitude of the transmitter and receiver.  Use
15this for WWV/H and CHU.  Don't use it for WWVB (the computation
16is easier for that).
17
18Chutest can be used to input and process data from a CHU modem
19attached to a serial port.  It will use the CHU line discipline
20(if installed), or raw mode otherwise.  This was used to test
21out the initial reduction algorithms, and may not be up to date.
22