[ntp:questions] WWV audio driver, FreeBSD, Can't seem to get it going

wa6zvp at gmail.com wa6zvp at gmail.com
Fri May 20 17:12:05 UTC 2005


Folks,
 I suspect that interest in drivers other than GPS and PPS are waning,
in fact I have 3 GPS based servers as well, but thought I'd try
something else.

I have a Traconex 1020 WWV receiver used with driver 3 which works
rather well, so I thought I would add the audio driver (36) to the mix.

System is an older Dell workstation with FreeBSD 5.3.  The NTP version
is 4.2.0a-20050303, although I've tried others, and even BSD 5.4
The sound 'card' is on the motherboard.

I did:
kldload snd_driver
which resulted in:
May 19 19:57:01 Fuzzball kernel: pcm0: <Intel ICH2 (82801BA)> port
0xdc40-0xdc7f,0xd800-0xd8ff irq 10 at device 31.5 on pci0
May 19 19:57:01 Fuzzball kernel: pcm0: <Analog Devices AD1885 AC97
Codec>
May 19 19:57:01 Fuzzball kernel: pcm0: measured ac97 link rate at 55945
Hz
May 19 20:08:03 Fuzzball ntpd[970]: ntpd 4.2.0a at 1.1191-r Wed May 18
20:59:11 PM

and it created /dev/audio0.0 to which I symlinked ntp.audio.0

ntp.conf contains:
server 127.127.36.0
fudge 127.127.36.0 flag2 1 flag3 1 flag4 1

Here is the last 3 samples from clockstats:

53510 59149.914 127.127.36.0 wwv8 2  91 WV15 0   226  10.1 62698  4880
62698
53510 59149.914 127.127.36.0 wwv8 2  91 WH15 0   248  12.5 443431  4880
443431
53510 59208.430 127.127.36.0 wwv8 2 111 WV15 0   361  13.2 24318  2480
24318
53510 59208.430 127.127.36.0 wwv8 2 111 WH15 0   264  15.7 35736  2480
35736
53510 59266.946 127.127.36.0 wwv8 2  91 WV15 0   298   9.5 28666    80
28666
53510 59266.946 127.127.36.0 wwv8 2  91 WH15 0   254  12.0 239884    80
239884

The AGC does show action and responds to removing/inserting audio.
However, the tone filters never seem to get a grasp on things, like
perhaps the output of the A/D is garbage?

I know that Dave Mills has said that this driver is no longer
maintainable, at least by him, but I found references from last year
that it did work under FreeBSD.

Does anyone have any ideas on where I should go from here?

        Roger




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