On 02/25/2018 05:16 AM, Piotr Krysik via USRP-users wrote:
To check this I connected two tag_debug blocks to usrp sources. They
caught following tags at offset 0 (first sample of the stream):
----------------------------------------------------------------------
Tag Debug:
Input Stream: 00
Offset: 0 Source: gr uhd usrp source2 Key: rx_time Value: {9
3.86875e-05}
Offset: 0 Source: gr uhd usrp source2 Key: rx_rate Value: 1e+06
Offset: 0 Source: gr uhd usrp source2 Key: rx_freq Value: 1e+09
----------------------------------------------------------------------
----------------------------------------------------------------------
Tag Debug:
Input Stream: 00
Offset: 0 Source: gr uhd usrp source1 Key: rx_time Value: {9
3.86875e-05}
Offset: 0 Source: gr uhd usrp source1 Key: rx_rate Value: 1e+06
Offset: 0 Source: gr uhd usrp source1 Key: rx_freq Value: 1e+09
----------------------------------------------------------------------
There are two rx_time tags with the same value. So they should be
aligned in time, but they aren't.
What is a bit unexpected for me is the non-zero fractional part.
OK, so (and apologies if this was in your previous data) what is the
average magnitude of the time discrepancy?
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