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Re: [Discuss-gnuradio] Configure UHD source and File sink to save intege

From: mepard
Subject: Re: [Discuss-gnuradio] Configure UHD source and File sink to save integers
Date: Mon, 4 Mar 2013 15:07:47 -0600

On Mar 4, 2013, at 2:43 PM, Josh Blum <address@hidden> wrote:
> On 03/04/2013 02:36 PM, mepard wrote:
>> I'd like to feed a File Sink from a UHD Source with 4 channels -- 2
>> motherboards, each with A:A A:B subdev specs. To cut down on the file
>> size, I'd like to record integers instead of floating point.
>> Which data type should I tell the UHD source to produce? Which type
>> should I tell the File Sink to record? What conversions do I need in
>> between? I'd like to stay in GRC, if possible.
> Sure thing. You can set the file sink to integer (int32), and either set
> the usrp source block to vita word32 or sc16 type (both are 32 bits per
> sample).
> Thats still 4 streams, not sure if you are interleaving them or using 4
> file sinks.

One thing I forgot is that I'd like to convert complex<sint16> to a single 
sint16 with just the "real" part, like I can convert complex<float> to single 
float. It doesn't look like there is the equivalent of Complex To Real for 

Is there an alternative to converting to floating point and back?


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