GnuRadio File sink Operation, Need help

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1

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2

There’s the metadata file sink. You could insert date/time tags.

Or, if the rates are quite low (a few Hz at most), you could use a
probe, and have a poller function that grabs data from the probe, and

formats it all pretty like. That’s how simple_ra writes its data log
files…

On 2014-09-05 11:06, Sumit Saluja wrote:

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Hi Sumit,

that’s kind of redundant – you know the start time and you know the
constant sampling rate, so you know the time of each sample in your
file. Anyway, the metadata sink saves every tag you specify, so just
write a block that calculates the time to a given sample number, and
occasionally adds a tag to the stream.

Greetings,
Marcus

5

This then turns into a discussion about tagging during flow-graph
operation. A subject I’m not that familiar with, so perhaps someone

else can insert their $0.02.

On 2014-09-05 11:12, Sumit Saluja wrote:

SUBJECT: Re: [Discuss-gnuradio] GnuRadio File sink Operation, Need help

Princeton, NJ 08540

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6

I’ll flip you $0.01; I found the new tutorials to be really helpful, and
this
one specifically shows how to write a block that inserts stream tags
(the
preceding tutorial shows how to write a block):

http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_Programming_Topics

Although adding system time to every Nth sample may be pointless on a
high
rate stream, it may be useful for low rate stuff.

Lou
KD4HSO

mleech wrote

This then turns into a discussion about tagging during flow-graph
operation. A subject I’m not that familiar with, so perhaps someone

else can insert their $0.02.

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