I am currently setting up a NTP stratum 1 time server with a DIY DCF77 clock. According to the documentation I need to configure one of the lines below.
# Walter Schmid DCF receiver Kit (AM demodulation / 1ms)
#server 127.127.8.0 mode 4
# RAW DCF77 100/200ms pulses (Conrad DCF77 receiver module / 5ms)
#server 127.127.8.0 mode 5
# RAW DCF77 100/200ms pulses (TimeBrick DCF77 receiver module / 5ms)
#server 127.127.8.0 mode 6
# RAWDCF receiver (DTR=high/RTS=low)
#server 127.127.8.0 mode 14
# RAWDCF receiver (DTR=low/RTS=high)
#server 127.127.8.0 mode 16
Unfortunately the documentation does not provide much detail about the differences between those drivers. Has anyone a hint which one I should chose and why?