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I think it is a good idea to mention this signal and refer the reader to the ITU standards. Rich From: stds-1904-3-tf@xxxxxxxx [mailto:stds-1904-3-tf@xxxxxxxx]
On Behalf Of Bross, Kevin All, We’ve talked at various times about wanting to be able to measure the synchronization accuracy of RoE equipment. The 1PPS output signal is commonly used in telecom and test
equipment; even some standard Ethernet switches with 1588 support have 1PPS outputs. I think it would be good for the RoE spec to either encourage or require RoE equipment to provide the 1PPS output. Here is some proposed text to consider: RoE equipment should/shall provide a 1PPS output as described in clause A.1.3 and clause A.2 of ITU-T G.8271/Y.1366. Clause A.1.3 talks about the timing of the 1PPS coinciding with the transition to a new second, and clause A.2 describes the 50-ohm 1PPS signal. Feedback? --kb ------------------------------------------------------------------ |