1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Implementers Guide to Recommendation ITU-T P.10/G.100 Amd.4 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (21 January 2016) Implementers Guide to Recommendation ITU-T P.10/G.100 Amd.4 ii Implementers Guide to Recommendati
2、on ITU-T P.10/G.100 Amd.4 Contact Information ITU-T Study Group 12 / Question 2/12 Rapporteurs Joachim Pomy Opticom GmbH Germany Tel: +49 177 78 71958 Email: consultantjoachimpomy.de iii Implementers Guide to Recommendation ITU-T P.10/G.100 Amd.4 Implementers Guide to Recommendation ITU-T P.10/G.100
3、 Amd.4 This Implementers Guide provides clarification regarding the use of the term “max.” in the tables of Amd.4 to Recommendation ITU-T P.10/G.100. It was agreed by ITU-T Study Group 12 on 21 January 2016. In P.10/G.100 the definition of the attenuation at the bandwidth limits in Tables 1 to 4, ar
4、e typographically misleading. 1. You should interpret “-40 dB (max.)” in Tables 1 to 4 as a minimum stop-band attenuation of 40dB in the filter definition (and thus a maximum stop-band gain of -40dB) 2. You should interpret “-50 dB (max.)” in Table 1 as a minimum stop-band attenuation of 50dB in the
5、 filter definition (and thus a maximum stop-band gain of -50dB) 3. You should interpret “-20 dB (max.)” in Table 1 as a minimum stop-band attenuation of 20dB in the filter definition (and thus a maximum stop-band gain of -20dB) The values define the minimum attenuation, it can be exceeded until the technical maximum. _
