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From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] If uhd support a more precise In band signaling timestamp in the resolution 1ns or 10ns? |
Date: | Fri, 04 Jun 2010 03:04:06 -0700 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc12 Thunderbird/3.0.4 |
On 06/04/2010 02:34 AM, John Wu wrote:
Hi Matt, I recently learn the uhd project which contain a double type timestamp in band signaling. I want to know if this change really take a more precise timestamp from usrp hardware or it just an interface change to meet other hardware? For now, I want to measure the time of flight to count a distance, so the timestamp should be as precise as at least 100ns to meet my need.
The UHD will give you sample times which are accurate to 1 cycle. On the USRP2 this is 10ns.
Matt
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