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Re: USRP N210 growing latencies
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From: |
Marcus Müller |
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Subject: |
Re: USRP N210 growing latencies |
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Date: |
Tue, 26 Oct 2021 19:43:02 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 |
Hello!
On 26.10.21 16:12, Fabien PELLET wrote:
>
> Why that propagation delay is always growing ?
>
Exactly *becuause* your underflowing.
Your Receive side produces N samples – but too slow at some point, leading to
your
transmitter needing to "invent" an amount P of samples, because it simply has a
fixed
sample rate.
So, now, from the point of view of the transmitter's DAC, N+P sample periods
have passed,
whereas the receiver's ADC saw N sample periods. This repeats, and every P > 0.
Therefore,
the delay is always only growing.
Best regards,
Marcus