Ntp Chu_Audio | Audio-Digital.net

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Radio CHU Audio Demodulator/Decoder - doc.ntp.org

http://doc.ntp.org/archives/drivers/driver7/

The audio gain shows the current codec gain setting in the range 0 to 255. Ordinarily, the receiver audio gain control should be set for a value midway in this range. ident. The CHU identifier CHU followed by the current radio frequency code, if the CI-V interface is active, or CHU if not. The radio frequncy is encoded as 0 for 3.330 MHz, 1 for 7.850 MHz and 2 …

ConfiguringAudioRefclocks < Support < NTP

https://support.ntp.org/bin/view/Support/ConfiguringAudioRefclocks

With linux, I configure for ALSA audio fragment size with echo: echo "ntpd 2 128" > /proc/asound/card0/pcm0c/oss To actually debug the ntpd audio setup, build an ntp.conf with only the irig/wwv/chu driver, then "ntpd -D2" to get a view of the audio gain adjustments. I see things like this: audio_gain: gain 139/54 audio_gain: gain 143/56 ..etc

Reference Clock Audio Drivers - doc.ntp.org

http://doc.ntp.org/archives/4.2.2-series/audio/

The suite of NTP reference clock drivers currently includes three drivers suitable for these applications. They include a driver for the Inter Range Instrumentation Group (IRIG) signals produced by many radio clocks and timing devices, another for the Canadian time/frequency radio station CHU and a third for the NIST time/frequency radio ...

Radio CHU Audio Demodulator/Decoder

http://web.mit.edu/freebsd/head/contrib/ntp/html/drivers/driver7.html

Synopsis. Address: 127.127.7.u. Reference ID: CHU. Driver ID: CHU. Modem Port: /dev/chuu; 300 baud, 8-bits, no parity. Autotune Port: /dev/icom; 1200/9600 baud, 8-bits, no parity. Audio Device: /dev/chu_audioand /dev/audioctl. Description. This driver synchronizes the computer time using data encoded in radio transmissions from Canadian time/frequency station CHU in Ottawa, …

[SOLVED] NTP Problem - LinuxQuestions.org

https://www.linuxquestions.org/questions/slackware-14/ntp-problem-4175503347/

If you can get one of them going, you can have good time while working out the rest of the issues. Should you need to recompile ntpd in order to use them, I think the ./configure flags will include "--enable-WWV --enable-CHU --enable-AUDIO-CHU". You can add them directly to the ntp.SlackBuild file that comes with Slackware's ntpd source code. If you remove the NTP …

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