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Re: [Discuss-gnuradio] How to show the internal clock on the flowgraph

From: Marcus Müller
Subject: Re: [Discuss-gnuradio] How to show the internal clock on the flowgraph
Date: Mon, 02 Mar 2015 21:11:43 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

Hi Manuel,

your signal is sampled with a sample rate. You can now estimate the time shift in (fractional) samples, and calculate the "wall clock" time difference by dividing by the sampling rate.
You, as a user, set the sampling rate that your device uses. The B210 is very flexible in respect to that.

Best regards,

On 03/02/2015 09:02 PM, Manuel David Lozano Amezquita wrote:

Hi Marcus

Thank you for your time,

I need to transmit a signal and then receive it, so I need the time difference between the two signals. I thought that I need a clock in both so I could compare in the same time scale the two signals. Thats why I need the clock.

Or how can I take the time between the 2 signals?

Thank you!

El mar 2, 2015 2:53 PM, =?ISO-8859-1?Q?Marcus_M=FCller?= <address@hidden> escribió:
Hi Manuel,
On 03/02/2015 08:38 PM, Manuel David Lozano Amezquita wrote:

Hi Marcus, I know that the clock of the USRP b210 is 62MHz, but I need to show it on the flowgraph to compare the phase of two signals.

I'm really confused. You *can* configure the master clock rate, which is the rate at which the signal is sampled, to be up to 61.44MHz, but that's neither the default nor 62MHz. There are several clocks in the B210, so maybe I'm missing something.

Where does that freuquency come from? What does it signify?
Why do you need it to compare phases? Of what?

Best regards,
Marcus Müller



El mar 2, 2015 2:26 PM, =?ISO-8859-1?Q?Marcus_M=FCller?= <address@hidden> escribió:
Hi Manuel,

could you explain what you mean with "internal clock of the board"?

Best regards,
Marcus Müller

On 03/02/2015 08:04 PM, Manuel David Lozano Amezquita wrote:
Hi everyone,

I'm using a USRP B210 board, and I don't know how to watch on the flowgraph the internal clock of the board, I need it to compare the time difference of two signals.

Please Help Meeeee.



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