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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] File sink question |
Date: | Fri, 31 Mar 2017 01:02:15 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
Dear Ellie, I'm not aware of any GNU Radio-compatible SDR receiver with a sampling rate of 300 MHz - that is very high - are you perhaps confusing sampling rate and center frequency? How do you "measure" 5min? GNU Radio doesn't "run" at the sampling rate you set in things like the signal source – that is really just a number, a parameter, that the signal source uses together with the signal frequency you configure to calculate how long a period is in samples. Samples will be produced as fast as your computer is – which is probably less then 300 MS/s. So, if you'd want 5mins of "simulated signal", you'd use a "head"
block, with the number of samples being set to 300,000,000·60·5.
Notice that you **do not** want to do that, usually. In GNU
Radio's default complex signal type, which is complex numbers
composed of 32 bit real and 32bit imaginary float, that's 720 GB. Best regards, Marcus On 03/31/2017 12:13 AM, Ellie White
wrote:
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