Re: [Discuss-gnuradio] AUTOMATIC START AND STOP FILE RECORDING

[Marcus Müller]

Hi Ernest,


On 25.08.2016 07:07, Ernest Matey wrote:
> It is critical for me to start the recording simultaneously and
> synchronized to more than 100ms accuracy between the stations.


100ms is a whole different story than nanoseconds in your other post;
You could probably achieve this 0.1s accuracy by coordinating computer
clocks (NTP, PTP) and then triggering recording with those.

Anyway, since your hardware, as far as I know, doesn't allow for timing
control itself, doing exactly what Kevin recommended sounds clever:
you've inserted PPS signals in your sample stream, so use the very rough
PC-clock-aligned sampling start to give your "roughly aligned" streams,
and extract the PPS information from your recordings later on to fine-align.

Best regards,
Marcus